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  • Wiley  (270)
  • Oxford University Press
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  • 1
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    New Mediums, Better Messages? (2022)
    Oxford University Press
    Details
    Publication Date: 2022-11-18
    Description: The notion of development influences and is influenced by all aspects of human life. Social science is but one representational option among many for conveying the myriad ways in which development is conceived, encountered, experienced, justified, courted, and/or resisted by different groups at particular times and places. This wide-ranging collection from a diverse group of academic and non-academic authors engages with the broad field of development through twelve chapters that deal with music, theatre, fiction, photography, festivals, computer games, the arts, blogging, and other media. It explores three broad areas of alternative forms of knowledge about development, organized around the three themes of ‘translation’, ‘advocacy’, and ‘engagement’. The first of these is concerned with how popular representations of development can successfully compete with and complement formal social scientific representations; the second relates to the politics of popular representations of development, and the way that popular productions shape debates; and the third asks whether popular representations of development can generate alternative critiques that allow for the articulation of views that would be unacceptable to more orthodox means.
    Keywords: international development, popular representations of development, culture, translation, advocacy, arts and international development, media and development, development studies, festivals, music, theatre, fiction, photography, computer games, blogging, politics of representation, decolonizing knowledge ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics::KCM Development economics & emerging economies ; bic Book Industry Communication::A The arts
    Language: English
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  • 2
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    Gauge Theory of Elementary Particle Physics (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-05
    Description: The aim of this book is to provide student and researcher with a practical introduction to some of the principal ideas in gauge theories and their applications to elementary particle physics. Elementary particle physics has made remarkable progress. We have a comprehensive theory of particle interactions. One can argue that it gives a complete and correct description of all non-gravitational physics. This theory is based on the principle of gauge symmetry. Strong, weak, and electromagnetic interactions are all gauge interactions. A knowledge of gauge theory is essential for anyone interested in modern high energy physics. Regardless of the ultimate correctness of every detail of this theory, it is the framework within which new theoretical and experimental advances will be interpreted in the foreseeable future.
    Keywords: Particle physics, relativistic quantum field theory, gauge symmetry, strong interactions, weak interactions, electromagnetic interactions, principles of locality, causality, renormalizability ; thema EDItEUR::P Mathematics and Science::PH Physics::PHN Nuclear physics
    Language: English
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  • 3
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    Chapter 17 Technology to Prevent Criminal Behavior (2022)
    Oxford University Press
    Details
    Publication Date: 2022-09-24
    Description: technology; prevent; criminal behavior
    Keywords: crime prevention; neurointerventions; neuroethics ; bic Book Industry Communication::J Society & social sciences::JK Social services & welfare, criminology::JKV Crime & criminology::JKVC Causes & prevention of crime
    Language: English
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  • 4
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    Sticky Power (2022)
    Oxford University Press
    Details
    Publication Date: 2022-09-13
    Description: Modern civilization revolves around money. However, money is a paradox. It is nothing more than a representation of and medium for decentralized networks of social trust, but its production is controlled by highly centralized networks of firms, places, and governments, and there is never enough of it to go around. Moreover, given that the creation of money, as credit, is based on expectations, money is at its heart an instrument for human agency to change the future. At the same time, however, the financial systems that produce money are deeply rooted in the past, and perpetuate themselves through history. This book seeks to deepen our understanding of the paradox of money, by introducing a novel conceptual lens—that of Global Financial Networks—to cast new light on the geography, history, politics, and sociology of finance from the middle ages to the global financial crisis and beyond. It shows that the power of finance is inherently “sticky”; with what are generally assumed to be new innovations such as “offshore” finance actually dating back centuries, and the architecture of global financial networks more broadly adapting to the rise and fall of empires and new technologies while changing surprisingly little in their basic character; or at most changing very slowly. A recognition of the mechanics of this durability, it is argued, calls for a new approach to reforming finance which is less reactively focused on regulation, and more proactively focused on building new institutional systems with a long-term “sticky power” of their own.
    Keywords: Financial geography, economic geography, economic history, international political economy, global financial networks, financial centers, financial and business services, offshore jurisdictions, financial innovation, financial institutions ; bic Book Industry Communication::K Economics, finance, business & management::KF Finance & accounting::KFF Finance ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics::KCL International economics ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics::KCZ Economic history
    Language: English
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  • 5
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    Chapter 1 Rethinking our Assumptions about Moral Status (2022)
    Oxford University Press | Rethinking Moral Status
    Details
    Publication Date: 2024-04-14
    Description: Recent technological developments and potential technological developments of the near future require us to try to think clearly about what it is to have moral status and about when and why we should attribute moral status to beings and entities. What should we say about the moral status of human non-human chimeras, human brain organoids, artificial intelligence, cyborgs, post-humans, and human minds that have been uploaded into a computer, or onto the internet? In this introductory chapter we survey some key assumptions ordinarily made about moral status that may require rethinking. These include the assumptions that all humans who are not severely cognitively impaired have equal moral status, that possession of the sophisticated cognitive capacities typical of human adults is necessary for full moral status, that only humans can have full moral status, and that there can be no beings with higher moral status than ordinary adult humans. We also need to consider how we should treat beings and entities when we find ourselves uncertain about their moral status.
    Keywords: artificial intelligence, cyborgs, human brain organoids, human non-human chimeras, moral uncertainty, moral status, post-humans, slavery, species membership, uploaded minds ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYQ Artificial intelligence
    Language: English
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  • 6
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    Social Mobility in Developing Countries (2022)
    Oxford University Press
    Details
    Publication Date: 2024-03-30
    Description: Social mobility is the hope of economic development and the mantra of a good society. There are disagreements about what constitutes social mobility, but there is broad agreement that people should have roughly equal chances of success regardless of their economic status at birth. Concerns about rising inequality have engendered a renewed interest in social mobility—especially in the developing world. However, efforts to construct the databases and meet the standards required for conventional analyses of social mobility are at a preliminary stage and need to be complemented by innovative, conceptual, and methodological advances. If forms of mobility have slowed in the West, then we might be entering an age of rigid stratification with defined boundaries between the always-haves and the never-haves—which does not augur well for social stability. Social mobility research is ongoing, with substantive findings in different disciplines—typically with researchers in isolation from each other. A key contribution of this book is the pulling together of the emerging streams of knowledge. Generating policy-relevant knowledge is a principal concern. Three basic questions frame the study of diverse aspects of social mobility in the book. How to assess the extent of social mobility in a given development context when the datasets by conventional measurement techniques are unavailable? How to identify drivers and inhibitors of social mobility in particular developing country contexts? How to acquire the knowledge required to design interventions to raise social mobility, either by increasing upward mobility or by lowering downward mobility?
    Keywords: Development economics & emerging economies; social mobility; welfare economics; economic growth ; thema EDItEUR::K Economics, Finance, Business and Management::KC Economics::KCM Development economics and emerging economies ; thema EDItEUR::J Society and Social Sciences::JB Society and culture: general::JBF Social and ethical issues::JBFQ Social mobility ; thema EDItEUR::K Economics, Finance, Business and Management::KC Economics::KCV Economics of specific sectors::KCVK Welfare economics
    Language: English
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  • 7
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    Global Legitimacy Crises (2022)
    Oxford University Press
    Details
    Publication Date: 2022-11-24
    Description: This book addresses the consequences of legitimacy in global governance, in particular asking: when and how do legitimacy crises affect international organizations (IOs) and their capacity to rule. The book starts with a new conceptualization of legitimacy crisis that looks at public challenges from a variety of actors. Based on this conceptualization, it applies a mixed-methods approach to identify and examine legitimacy crises, starting with a quantitative analysis of mass media data on challenges of a sample of 32 IOs. It shows that some, but not all organizations have experienced legitimacy crises, spread over several decades from 1985 to 2020. Following this, the book presents a qualitative study to further examine legitimacy crises of two selected case studies: the WTO and the UNFCCC. Whereas earlier research assumed that legitimacy crises have negative consequences, the book introduces a theoretical framework that privileges the activation inherent in a legitimacy crisis. It holds that this activation may not only harm an IO, but could also strengthen it, in terms of its material, institutional, and decision-making capacity. The following statistical analysis shows that whether a crisis has predominantly negative or positive effects depends on a variety of factors. These include the specific audience whose challenges define a certain crisis, and several institutional properties of the targeted organization. The ensuing in-depth analysis of the WTO and the UNFCCC further reveals how legitimacy crises and both positive and negative consequences are interlinked, and that effects of crises are sometimes even visible beyond the organizational borders.
    Keywords: legitimacy, legitimacy crises, global governance, international organizations, legitimacy audiences, effects of legitimacy, capacity to rule, liberal world order, UNFCCC, WTO ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPS International relations ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPS International relations::JPSN International institutions ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPH Political structure & processes::JPHV Political structures: democracy ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPA Political science & theory
    Language: English
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  • 8
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    Elementary Scattering Theory (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-05
    Description: The opportunities for doing scattering experiments at synchrotron and neutron facilities have grown rapidly in recent years and are set to continue to do so into the foreseeable future. This text provides a basic understanding of how these techniques enable the structure and dynamics of materials to be studied at the atomic and molecular level. Although mathematics cannot be avoided in a theoretical discussion, the aim has been to write a book that most scientists will still find approachable. To this end, the first two chapters are devoted to providing a tutorial background in the mathematics and physics that are implicitly assumed in other texts. Thereafter, the philosophy has been one of keeping things as simple as possible.
    Keywords: scattering experiments, synchrotron facilities, neutron facilities, dynamics of materials, structure of materials ; thema EDItEUR::P Mathematics and Science::PH Physics::PHF Materials / States of matter::PHFC Condensed matter physics (liquid state and solid state physics) ; thema EDItEUR::P Mathematics and Science::PN Chemistry::PNT Crystallography ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials::TGM Materials science
    Language: English
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  • 9
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    Policy Success in Canada (2022)
    Oxford University Press
    Details
    Publication Date: 2022-11-18
    Description: This book offers twenty-two in-depth case studies of public policies and programs of both provincial and federal governments in Canada that have been markedly successful. Using a common analytical framework, each case study describes the history and evolution of the policy, and assesses the extent of its programmatic, process, political and long-term success. Combined, the cases provide a unique collection of stories about instances in which Canadian institutions and policymakers actually worked as taxpayers would hope they always do. The volume provides a key and open access resource for teachers and researchers of both Canadian and comparative public policy.
    Keywords: Policy Success, Canada, Program success, Political success, Policymaking, Policy endurance ; bic Book Industry Communication::J Society & social sciences::JP Politics & government ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPA Political science & theory ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPQ Central government::JPQB Central government policies ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPP Public administration
    Language: English
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  • 10
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    Oxford Handbook of Philosophy and Disability (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-05
    Description: This Handbook introduces philosophers, as well as other scholars in the humanities and social sciences, to one of the most dynamic new areas of philosophical inquiry. Disability raises some of the deepest conceptual and normative issues about human embodiment and well-being; dignity, respect, justice and equality; and personal and social identity. But it also raises pressing practical questions for educational, health, reproductive, and technology policy, and confronts controversial questions about the scope and direction of the human and civil rights movements. The Handbook addresses these issues and more, with contributions from some of the most prominent philosophers in the field. The clarity it brings to these discussions demonstrates fully the continued centrality and importance of philosophical inquiry.
    Keywords: Philosophy, disability, human embodiment, social identity, normative, conceptual, dignity, human well-being, civil rights, human rights ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy
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  • 11
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    Comparative Policy Agendas (2022)
    Oxford University Press
    Details
    Publication Date: 2024-03-29
    Description: The Comparative Agendas Project (CAP) brings together data on government activities in over twenty countries, and provides a consistent categorizing system to understand when a given institution of government in a particular country took action on any issue of public policy. All topics are covered, comprehensively, over several decades, in some countries going back to World War II. Because of the open-data philosophy that animates the international network of scholars involved in the project and their meticulous attention to comparability and common data coding conventions, the databases of the CAP represent an unprecedented resource for the study of public policy across national borders. In this major new book, leaders of each national team provide the background and information needed for anyone to understand how best to make use of these newly available historical databases. Interested users will range from novice students of public policy to accomplished scholars, from interested citizens to professional journalists, political or partisan activists, and professional staff of legislative assemblies or national administrative agencies. The book’s sections include chapters introducing the CAP to a new audience, describing each national project, illustrating various cross-national uses and analyses that the CAP data allow, and concluding with ideas for further practical and research uses.
    Keywords: comparative public policy, comparative public administration, comparative legislative institutions, comparative media systems, comparative party systems, comparative politics, Comparative Agendas Project ; thema EDItEUR::J Society and Social Sciences::JP Politics and government::JPA Political science and theory ; thema EDItEUR::J Society and Social Sciences::JP Politics and government::JPB Comparative politics
    Language: English
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  • 12
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    Victims' State (2022)
    Oxford University Press | OUP USA
    Details
    Publication Date: 2024-04-04
    Description: Victims' State is the first integrated account of how Imperial Austria and the successor Austrian Republic responded to the needs of citizen-soldiers and their families in the age of mass politics and the First World War. It shows that compulsory military service and war mobilization changed the mission of the Austrian state and citizens' understanding of what they were entitled to, thus showing how war victim welfare was central to shaping modern European welfare state.
    Keywords: warfare-welfare nexus;Imperial Austria;Austrian First Republic;welfare state;First World War;disabled veteran;pension;conscription;war victim;social citizenship ; thema EDItEUR::N History and Archaeology::NH History::NHW Military history::NHWR Specific wars and campaigns::NHWR5 First World War ; thema EDItEUR::3 Time period qualifiers::3M c 1500 onwards to present day::3MP 20th century, c 1900 to c 1999::3MPB Early 20th century c 1900 to c 1950::3MPBF c 1910 to c 1919::3MPBFB c 1914 to c 1918 (World War One period) ; thema EDItEUR::N History and Archaeology::NH History::NHD European history ; thema EDItEUR::N History and Archaeology::NH History
    Language: English
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  • 13
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    The Digital Humanities and Literary Studies (2022)
    Oxford University Press
    Details
    Publication Date: 2024-03-27
    Description: This book delivers an introduction and overview of developing intersections between digital methods and literary studies. The Digital Humanities and Literary Studies serves as a starting place for those who wish to learn more about the possibilities, and the limitations, of the oft-touted digital humanities in the literary space. The volume engages with the proponents of digital humanities and its detractors alike, aiming to offer a fair and balanced perspective on this controversial topic. The book combines a survey and background approach with original literary research and, therefore, straddles the divide between seasoned digital experts and interested newcomers.
    Keywords: literary studies; literature; history; criticism; ethical & social aspects of IT ; thema EDItEUR::D Biography, Literature and Literary studies::DS Literature: history and criticism::DSB Literary studies: general ; thema EDItEUR::D Biography, Literature and Literary studies::D Biography, Literature and Literary studies::DS Literature: history and criticism ; thema EDItEUR::U Computing and Information Technology::UB Information technology: general topics::UBJ Digital and information technologies: social and ethical aspects
    Language: English
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  • 14
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    Vulnerability and the Politics of Care (2022)
    Oxford University Press
    Details
    Publication Date: 2024-03-30
    Description: Vulnerability is a fundamental aspect of existence, giving rise to the need for care in various forms. Yet we are not all vulnerable in the same way, and not all vulnerabilities are equally recognised or cared for. This transdisciplinary volume considers how vulnerability and care are shaped by relations of power within contemporary contexts of war, development, environmental degradation, sexual violence, aging populations and economic precarity. It proposes that care for vulnerable populations or individuals is inseparable from other political processes of recognition, welfare, healthcare and security, whilst also exploring vulnerability as a shared, generative condition that makes caring possible. Ethnographic and narrative accounts of vulnerable life and caring relations in various geographical regions - including Japan, Uganda, Micronesia, Iraq, Mexico, the UK and the US - are interspersed with perspectives from philosophy, International Relations, social and cultural theory, and more, resulting in a compelling series of intellectual exchanges, creative frictions and provocative insights.
    Keywords: health; politics
    Language: English
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  • 15
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    New Models for Managing Longevity Risk (2022)
    Oxford University Press
    Details
    Publication Date: 2022-03-10
    Description: Notwithstanding the terrible price the world has paid in the Coronavirus pandemic, the fact remains that longevity at older ages is likely to continue to rise in the medium and longer term. This volume explores how the private and public sectors can collaborate via public-private partnerships (PPPs) to develop new mechanisms to reduce older people’s risk of outliving their assets in later life. As we show in this volume, PPPs typically involve shared government financing alongside private-sector partner expertise, management responsibility, and accountability. In addition to offering empirical evidence on examples where this is working well, our contributors provide case studies, discuss survey results, and examine a variety of different financial and insurance products to better meet the needs of the aging population. The volume will be informative to researchers, plan sponsors, students, and policymakers seeking to enhance retirement plan offerings.
    Keywords: Longevity risk, public-private partnerships, retirement, pension, security ; bic Book Industry Communication::K Economics, finance, business & management::KF Finance & accounting::KFF Finance::KFFP Pensions ; bic Book Industry Communication::K Economics, finance, business & management::KN Industry & industrial studies::KNS Service industries::KNST Financial services industry ; bic Book Industry Communication::J Society & social sciences::JH Sociology & anthropology::JHB Sociology::JHBD Population & demography
    Language: English
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  • 16
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    Open Source Law, Policy and Practice (2022)
    Oxford University Press
    Details
    Publication Date: 2022-12-03
    Description: This book examines various policies, including the legal and commercial aspects of the Open Source phenomenon. Here, ‘Open Source’ is adopted as convenient shorthand for a collection of diverse users and communities, whose differences can be as great as their similarities. The common thread is their reliance on, and use of, law and legal mechanisms to govern the source code they write, use, and distribute. The central fact of open source is that maintaining control over source code relies on the existence and efficacy of intellectual property (‘IP’) laws, particularly copyright law. Copyright law is the primary statutory tool that achieves the end of openness, although implemented through private law arrangements at varying points within the software supply chain. This dependent relationship is itself a cause of concern for some philosophically in favour of ‘open’, with some predicting (or hoping) that the free software movement will bring about the end of copyright as a means for protecting software.
    Keywords: open source, free software, intellectual property, copyright law, source code, private law, software supply, object code ; bic Book Industry Communication::L Law::LN Laws of Specific jurisdictions::LNQ IT & Communications law::LNQD Data protection law ; bic Book Industry Communication::L Law::LN Laws of Specific jurisdictions::LNQ IT & Communications law ; bic Book Industry Communication::L Law::LN Laws of Specific jurisdictions::LNR Intellectual property law
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  • 17
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    The Digital Continent (2022)
    Oxford University Press
    Details
    Publication Date: 2023-03-03
    Description: Only ten years ago, there were more internet users in countries like France or Germany than in all of Africa put together. But much has changed in a decade. The year 2018 marks the first year in human history in which a majority of the world’s population are now connected to the internet. This mass connectivity means that we have an internet that no longer connects only the world’s wealthy. Workers from Lagos to Johannesburg to Nairobi and everywhere in between can now apply for and carry out jobs coming from clients who themselves can be located anywhere in the world. Digital outsourcing firms can now also set up operations in the most unlikely of places in order to tap into hitherto disconnected labour forces. With CEOs in the Global North proclaiming that ‘location is a thing of the past’ (Upwork, 2018), and governments and civil society in Africa promising to create millions of jobs on the continent, the book asks what this ‘new world of digital work’ means to the lives of African workers. It draws from a year-long fieldwork in South Africa, Kenya, Nigeria, Ghana, and Uganda, with over 200 interviews with participants including gig workers, call and contact centre workers, self-employed freelancers, small-business owners, government officials, labour union officials, and industry experts. Focusing on both platform-based remote work and call and contact centre work, the book examines the job quality implications of digital work for the lives and livelihoods of African workers.
    Keywords: gig economy, outsourcing, digital work, labour, job quality, precarity, flexibility, labour agency, Africa ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics::KCM Development economics & emerging economies ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics::KCL International economics ; bic Book Industry Communication::R Earth sciences, geography, environment, planning::RG Geography::RGC Human geography::RGCM Economic geography ; bic Book Industry Communication::1 Geographical Qualifiers::1H Africa
    Language: English
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  • 18
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    Middle English Medical Recipes and Literary Play, 1375-1500 (2022)
    Oxford University Press
    Details
    Publication Date: 2024-03-27
    Description: This volume is the first detailed, book-length study of Middle English medical recipes in their literary, imaginative, social, and codicological contexts. Analysing recipe collections in over seventy late medieval manuscripts, this book explores how the words and structures of recipes could contribute to those texts’ healing purpose, but could also confuse, impede, exceed, and redefine that purpose. The study therefore presents a challenge to recipes’ traditional reputation as mundane, unartful texts written and read solely for the sake of directing practical action. Crucially, it also relocates these neglected texts and overlooked manuscripts within the complex networks forming medieval textual culture, demonstrating that—though marginalized in modern scholarship—medical recipes were actually linguistically, formally, materially, and imaginatively interconnected with many other late medieval discourses, including devotional writings, romances, fabliaux, and Chaucerian poetry. The monograph thus models for readers modes of analysis and close reading that might be deployed in relation to recipes in order to understand better their allusive, fragmentary, and playful qualities as well as their wide-ranging influence on medieval imaginations.
    Keywords: recipes, remedies, medicine, Middle English, poetry, networks, imagination, close reading, play, fragments ; thema EDItEUR::D Biography, Literature and Literary studies::DS Literature: history and criticism::DSB Literary studies: general::DSBB Literary studies: ancient, classical and medieval ; thema EDItEUR::M Medicine and Nursing::MB Medicine: general issues::MBX History of medicine ; thema EDItEUR::3 Time period qualifiers::3K CE period up to c 1500::3KL c 1000 CE to c 1500
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  • 19
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    Chapter 11 Watchful Waiting (2022)
    Oxford University Press
    Details
    Publication Date: 2024-03-31
    Description: This paper opens up the relationship between vulnerability and the temporalities of care. It takes ‘care’ as not just a material practice that supports, manages and sustains vulnerable bodies, but as a temporal practice, one that produces time in situations that are otherwise felt to be stuck or ‘chronic’. It draws on some co-written anecdotes about the use of ‘watchful waiting’ by medical practitioners working in general practice in the UK’s National Health System (NHS) to think through the meanings of waiting in relation to chronic health and mental health crises. The offer of ‘watchful waiting’ as a response to ‘chronic crisis’ becomes a test case for understanding a more general condition of watchful waiting as a form of care, in a context in which waiting for healthcare has become an agony for many, experienced as a form of abandonment or a key sign of health service failure. The paper attempts to re-think ‘waiting times’ within a wider history of the temporalities of care, in order to elucidate the ways an offer of waiting can itself be understood as a response to vulnerability through a practice of staying with or alongside the chronic temporalities of others.
    Keywords: Temporality, waiting, care, crisis, mental health, general practice, NHS ; thema EDItEUR::M Medicine and Nursing::MB Medicine: general issues::MBP Health systems and services::MBPK Mental health services
    Language: English
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  • 20
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    Citizens, Elites, and the Legitimacy of Global Governance (2022)
    Oxford University Press
    Details
    Publication Date: 2022-11-18
    Description: Contemporary society has witnessed major growth in global governance, yet the legitimacy of global governance remains deeply in question. This book offers the first full comparative investigation of citizen and elite legitimacy beliefs toward global governance. Empirically, it provides a comprehensive analysis of public and elite opinion toward global governance, building on two uniquely coordinated surveys covering multiple countries and international organizations. Theoretically, it develops an individual-level approach, exploring how a person’s characteristics in respect of socioeconomic status, political values, geographical identification, and domestic institutional trust shape legitimacy beliefs toward global governance. The book’s central findings are threefold. First, there is a notable and general elite–citizen gap in legitimacy beliefs toward global governance. While elites on average hold moderately high levels of legitimacy toward international organizations, the general public is decidedly more skeptical. Second, individual-level differences in interests, values, identities, and trust dispositions provide significant drivers of citizen and elite legitimacy beliefs toward global governance, as well as the gap between the two groups. Most important on the whole are differences in the extent to which citizens and elites trust domestic political institutions, which shape how these groups assess the legitimacy of international organizations. Third, both patterns and sources of citizen and elite legitimacy beliefs vary across organizations and countries. These variations suggest that institutional and societal contexts condition attitudes toward global governance. The book’s findings shed light on future opportunities and constraints in international cooperation, suggesting that current levels of legitimacy point neither to a general crisis of global governance nor to a general readiness for its expansion.
    Keywords: global governance, international organizations, legitimacy, confidence, trust, citizens, elites, public opinion, elite opinion, International Criminal Court, International Monetary Fund, United Nations, World Bank, World Health Organization, World Trade Organization ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPS International relations ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPA Political science & theory ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPH Political structure & processes
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  • 21
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    Topics of Thought (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-08
    Description: This book concerns mental states such as thinking that Obama is tall, imagining that there will be a climate change catastrophe, knowing that one is not a brain in a vat, or believing that Martina Navratilova is the greatest tennis player ever. Such states are usually understood as having intentionality, that is, as being about things or situations to which the mind is directed. The contents of such states are often taken to be propositions. The book presents a new framework for the logic of thought, so understood—an answer to the question: Given that one thinks (believes, knows, etc.) something, what else must one think (ditto) as a matter of logic? This should depend on the propositions which make for the contents of the relevant thoughts. And the book defends the idea that propositions should be individuated hyperintensionally, i.e. not just by the sets of worlds at which they are true (as in standard ‘intensional’ possible worlds semantics), but also by what they are about: their topic or subject matter. Thus, the logic of thought should be ‘topic-sensitive’. After the philosophical foundations have been presented in Chapters 1−2, Chapter 3 develops a theory of Topic-Sensitive Intentional Modals (TSIMs): modal operators representing attitude ascriptions, which embed a topicality or subject matter constraint. Subsequent chapters explore applications ranging from mainstream epistemology (dogmatism, scepticism, fallibilism: Chapter 4), to the nature of suppositional thinking and imagination (Chapter 5), conditional belief and belief revision (Chapter 6), framing effects (Chapter 7), probabilities and indicative conditionals (Chapter 8).
    Keywords: Modal logic, Epistemic logic, Conditional logic, Hyperintensionality, Subject matters, Suppositional thought, Imagination, Belief revision, Framing effects, Indicative conditionals ; bic Book Industry Communication::H Humanities::HP Philosophy::HPL Philosophy: logic ; bic Book Industry Communication::H Humanities::HP Philosophy::HPK Philosophy: epistemology & theory of knowledge ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy::QDT Topics in philosophy::QDTL Philosophy: logic ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy::QDT Topics in philosophy::QDTK Philosophy: epistemology and theory of knowledge
    Language: English
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    Neutron Interferometry (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-05
    Description: Quantum mechanics is a part of physics where experiment and theory are inseparably intertwined. This general theme permeates the 2nd edition of this book. It discusses more than 40 neutron interferometry experiments along with their theoretical motivations and explanations. The basic ideas and results of interference experiments related to coherence and decoherence of matter waves and certain post-selection variations, gravitationally induced quantum phase shifts, Berry’s geometrical phases, spinor symmetry and spin superposition, and Bell’s inequalities are all discussed in this book. Both the scalar and vector Aharonov-Bohm topological interference effects and the neutron version of the Sagnac effect are presented in a self-contained and pedagogical way. Interferometry with perfect crystals, artificial lattices, and spin-echo systems are described in some detail. The book includes the theoretical underpinning as well as connections to other areas of experimental physics, such as quantum optics, nuclear physics, gravitation, and atom interferometry. The observed phase shifts due to the Earth’s gravity and rotation indicate a close connection to relativity theory. Neutron interferometry can be considered as a central technique of quantum optics with massive particles. It has stimulated the development of interferometry with atoms, molecules, and clusters. Quantum interference experiments with massive particles have direct consequences on the discussion of epistemological questions since they show explicitly the wave-particle duality, and the entanglement and the contextuality of various parameters governing our modern view of nature.
    Keywords: interferometry, neutrons, coherence, quantum mechanics, wave packets, spinor symmetry, quantum contextuality, AB effects, COW experiment, wave-particle duality, dynamical diffraction theory ; thema EDItEUR::P Mathematics and Science::PH Physics::PHM Atomic and molecular physics ; thema EDItEUR::P Mathematics and Science::PH Physics::PHJ Optical physics
    Language: English
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    Algorithmic Reason (2022)
    Oxford University Press
    Details
    Publication Date: 2022-09-06
    Description: Are algorithms ruling the world today? Is artificial intelligence making life-and-death decisions? Are social media companies able to manipulate elections? As we are confronted with public and academic anxieties about unprecedented changes, this book offers a different analytical prism to investigate these transformations as more mundane and fraught. Aradau and Blanke develop conceptual and methodological tools to understand how algorithmic operations shape the government of self and other. While disperse and messy, these operations are held together by an ascendant algorithmic reason. Through a global perspective on algorithmic operations, the book helps us understand how algorithmic reason redraws boundaries and reconfigures differences. The book explores the emergence of algorithmic reason through rationalities, materializations, and interventions. It traces how algorithmic rationalities of decomposition, recomposition, and partitioning are materialized in the construction of dangerous others, the power of platforms, and the production of economic value. The book shows how political interventions to make algorithms governable encounter friction, refusal, and resistance. The theoretical perspective on algorithmic reason is developed through qualitative and digital methods to investigate scenes and controversies that range from mass surveillance and the Cambridge Analytica scandal in the UK to predictive policing in the US, and from the use of facial recognition in China and drone targeting in Pakistan to the regulation of hate speech in Germany. Algorithmic Reason offers an alternative to dystopia and despair through a transdisciplinary approach made possible by the authors’ backgrounds, which span the humanities, social sciences, and computer sciences.
    Keywords: algorithms, governmentality, big data, artificial intelligence, politics, difference, self/other, friction, refusal, resistance ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPA Political science & theory ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPS International relations ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPV Political control & freedoms ; bic Book Industry Communication::U Computing & information technology::UM Computer programming / software development::UMB Algorithms & data structures ; bic Book Industry Communication::U Computing & information technology::UY Computer science::UYQ Artificial intelligence
    Language: English
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    Political Settlements and Development (2022)
    Oxford University Press
    Details
    Publication Date: 2022-09-06
    Description: Few concepts have captured the imagination of the conflict and development communities in recent years as powerfully as the idea of a ‘political settlement’. At its most ambitious, ‘political settlements analysis’ (PSA) promises to explain why conflicts occur and states collapse, the conditions for their successful rehabilitation, different developmental pathways from peace, and how to better fit development policy to country context. Yet despite the meteoric rise of the term and its tremendous promise, not all is well in the world of PSA. Rival definitions of the concept abound; there are disagreements about its scope and the way it should be used; a growing schism between conflict specialists and economists; basic concepts are ambiguous; and little progress has been made on measurement. This book consequently has three main aims. The first is to argue for a revised definition of a political settlement, capable of unifying its diverse strands. The second is to put the concept on a more solid theoretical and scientific footing, providing a method for measuring and categorizing political settlements, using both qualitative case studies and a large-n statistical analysis to illustrate its potential. And the third is to examine the implications of the findings for mainstream social science analysis and for policymakers.
    Keywords: Government Policy, Provision and Effects of Welfare Programmes, Economic Development, Development Planning and Policy, Rent-Seeking, Lobbying, Elections, Legislatures, and Voting Behavior, Bureaucracy, Administrative Processes in Public Organizations, Corruption, Conflict, Conflict Resolution, Alliances, Revolutions, Positive Analysis of Policy Formulation and Implementation, Political Economy ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics::KCP Political economy ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics::KCM Development economics & emerging economies ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics::KCS Economic systems & structures
    Language: English
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    Perceptual Experience (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-08
    Description: This book offers an account of perceptual experience—its intrinsic nature, its engagement with the world, its relations to mental states of other kinds, and its role in epistemic norms. One of the book’s main claims is that perceptual experience constitutively involves representations of worldly items. A second claim is that the relevant form of representation can be explained in broadly biological terms. After defending these foundational doctrines, the book proceeds to give an account of perceptual appearances and how they are related to the objective world. Appearances turn out to be relational, viewpoint dependent properties of external objects. There is also a complementary account of how the objects that possess these properties are represented. Another major concern is the phenomenological dimension of perception. The book maintains that perceptual phenomenology can be explained reductively in terms of the representational contents of experiences, and it uses this doctrine to undercut the traditional arguments for dualism. This treatment of perceptual phenomenology is then expanded to encompass cognitive phenomenology, the phenomenology of moods and emotions, and the phenomenology of pain. The next topic is the various forms of consciousness that perceptual experience can possess. A principal aim is to show that phenomenology is metaphysically independent of these forms of consciousness, and another is to de-mystify the form known as phenomenal consciousness. The book concludes by discussing the relations of various kinds that perceptual experiences bear to higher level cognitive states, including relations of format, content, and justification or support.
    Keywords: perception, experience, representation, teleosemantics, appearance, phenomenology, pain, consciousness, iconic representation, epistemic justification ; bic Book Industry Communication::H Humanities::HP Philosophy::HPJ Philosophy: metaphysics & ontology ; bic Book Industry Communication::H Humanities::HP Philosophy::HPM Philosophy of mind ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy::QDT Topics in philosophy::QDTJ Philosophy: metaphysics and ontology ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy::QDT Topics in philosophy::QDTM Philosophy of mind
    Language: English
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    The Black Book of Quantum Chromodynamics (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-05
    Description: The LHC (Large Hadron Collider) will serve as the energy frontier for high-energy physics for the next 20 years. The highlight of the LHC running so far has been the discovery of the Higgs boson, but the LHC programme has also consisted of the measurement of a myriad of other Standard Model processes, as well as searches for Beyond-the-Standard-Model physics, and the discrimination between possible new physics signatures and their Standard Model backgrounds. Essentially all of the physics processes at the LHC depend on quantum chromodynamics, or QCD, in the production, or in the decay stages, or in both. This book has been written as an advanced primer for physics at the LHC, providing a pedagogical guide for the calculation of QCD and Standard Model predictions, using state-of-the-art theoretical frameworks. The predictions are compared to both the legacy data from the Tevatron, as well as the data obtained thus far from the LHC, with intuitive connections between data and theory supplied where possible. The book is written at a level suitable for advanced graduate students, and thus could be used in a graduate course, but is also intended for every physicist interested in physics at the LHC.
    Keywords: LHC, Tevatron, QCD, Standard Model, Higgs boson, W/Z bosons, jets, parton showers, resummation, parton distribution functions ; thema EDItEUR::P Mathematics and Science::PH Physics::PHQ Quantum physics (quantum mechanics and quantum field theory) ; thema EDItEUR::P Mathematics and Science::PH Physics::PHP Particle and high-energy physics ; thema EDItEUR::P Mathematics and Science::PH Physics
    Language: English
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    The Challenges of Technology and Economic Catch-up in Emerging Economies (2022)
    Oxford University Press
    Details
    Publication Date: 2022-09-13
    Description: This book synthesizes and interprets existing knowledge on technology upgrading failures as well as lessons from successes and failures in order to better understand the challenges of technology upgrading in emerging economies. The objective is to bring together in one volume diverse evidence regarding three major dimensions of technology upgrading: paths of technology upgrading, structural changes in the nature of technology upgrading, and the issues of technology transfer and technology upgrading. The knowledge of these three dimensions is being synthesized at the firm, sector, and macro levels across different countries and world macro-regions. Compared to the old and new challenges and uncertainties facing emerging economies, our understanding of the technology upgrading is sparse, unsystematic, and scattered. While our understanding of these issues from the 1980s and 1990s is relatively more systematized, the changes that took place during the globalization and proliferation of GVCs, the effects of the post-2008 events, and the effects of the current COVID-19 and geopolitical struggles on technology upgrading have not been explored and compared synthetically. Moreover, the recent growth slowdown in many emerging economies, often known as a middle-income trap, has reinforced the importance of understanding the technology upgrading challenges of catching-up economies. We believe that the time is ripe for “taking stock of the area” in order to systematize and evaluate the existing knowledge on processes of technology upgrading of emerging economies at the firm, sector, and international levels and to make further inroads in research on this issue. This volume aims to significantly contribute towards this end.
    Keywords: technological capabilities, technology upgrading, global value chain, middle-income trap, emerging economies, innovation and economic growth, technology transfer, economic catching-up ; bic Book Industry Communication::K Economics, finance, business & management::KJ Business & management::KJD Business innovation ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics::KCG Economic growth ; bic Book Industry Communication::K Economics, finance, business & management::KJ Business & management::KJM Management & management techniques::KJMV Management of specific areas::KJMV3 Knowledge management
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    The Spirit of Global Health (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-08
    Description: Since the beginning of the World Health Organization, many of its staff members, regional offices, Member States, and directors-general have grappled with the question of what a ‘spiritual dimension’ of health looks like, and how it might enrich the health policies advocated by their organization. Contrary to the widespread perception that ‘spirituality’ is primarily related to palliative care and has emerged relatively recently within the WHO, this book shows that its history is considerably longer and more complex, and has been closely connected to the organization’s ethical aspirations, its quest for more holistic and equitable healthcare, and its struggle with the colonial legacy of international health organizations. Such ideals and struggles silently motivated many of its key actors and policies—such as the provision of universal primary healthcare—which for decades have embodied the organization’s loftiest aspirations. The WHO’s official relationship with ‘spirituality’ advanced in fits, leaps, and setbacks. At times creative and interdisciplinary, at others deeply political, this process was marked by cycles of institutional forgetting and remembering. Rather than a triumph of religious lobbyists, this book argues, the ‘spiritual dimension’ of health may be better understood as a ‘ghost’ that has haunted—and continues to haunt—the WHO as it comes to terms with its mandate of advancing health as a state of ‘complete well-being’ available to all.
    Keywords: religion, spirituality, global health, World Health Organization, United Nations, primary healthcare, healthcare reform, social determinants of health ; bic Book Industry Communication::H Humanities::HR Religion & beliefs::HRA Religion: general::HRAM Religious issues & debates::HRAM3 Religion & science ; bic Book Industry Communication::H Humanities::HR Religion & beliefs::HRA Religion: general::HRAM Religious issues & debates::HRAM2 Religion & politics ; bic Book Industry Communication::H Humanities::HR Religion & beliefs::HRA Religion: general::HRAX History of religion ; bic Book Industry Communication::M Medicine::MB Medicine: general issues::MBX History of medicine ; thema EDItEUR::Q Philosophy and Religion::QR Religion and beliefs::QRA Religion: general::QRAM Religious issues and debates::QRAM3 Religion and science ; thema EDItEUR::Q Philosophy and Religion::QR Religion and beliefs::QRA Religion: general::QRAM Religious issues and debates::QRAM2 Religion and politics ; thema EDItEUR::Q Philosophy and Religion::QR Religion and beliefs::QRA Religion: general::QRAX History of religion ; thema EDItEUR::M Medicine and Nursing::MB Medicine: general issues::MBX History of medicine
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    Bad Beliefs (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-08
    Description: Why do people come to reject climate science or the safety and efficacy of vaccines, in defiance of the scientific consensus? A popular view explains bad beliefs like these as resulting from a range of biases that together ensure that human beings fall short of being genuinely rational animals. This book presents an alternative account. It argues that bad beliefs arise from genuinely rational processes. We’ve missed the rationality of bad beliefs because we’ve failed to recognize the ubiquity of the higher-order evidence that shapes beliefs, and the rationality of being guided by this evidence. The book argues that attention to higher-order evidence should lead us to rethink both how minds are best changed and the ethics of changing them: we should come to see that nudging—at least usually—changes belief (and behavior) by presenting rational agents with genuine evidence, and is therefore fully respectful of intellectual agency. We needn’t rethink Enlightenment ideals of intellectual autonomy and rationality, but we should reshape them to take account of our deeply social epistemic agency.
    Keywords: belief, evidence, rationality, autonomy, nudging ; bic Book Industry Communication::H Humanities::HP Philosophy::HPK Philosophy: epistemology & theory of knowledge ; bic Book Industry Communication::H Humanities::HP Philosophy::HPQ Ethics & moral philosophy ; bic Book Industry Communication::H Humanities::HP Philosophy::HPS Social & political philosophy ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy::QDT Topics in philosophy::QDTK Philosophy: epistemology and theory of knowledge ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy::QDT Topics in philosophy::QDTQ Ethics and moral philosophy ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy::QDT Topics in philosophy::QDTS Social and political philosophy
    Language: English
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    The Oxford Handbook of Digital Ethics (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-08
    Description: digital ethics
    Keywords: digital ethics ; bic Book Industry Communication::H Humanities::HP Philosophy ; bic Book Industry Communication::H Humanities::HP Philosophy::HPQ Ethics & moral philosophy ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy::QDT Topics in philosophy::QDTQ Ethics and moral philosophy
    Language: English
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    The Politics of Distributing Social Transfers (2022)
    Oxford University Press
    Details
    Publication Date: 2022-09-06
    Description: This book provides a systematic analysis of the political processes shaping the distribution of social transfers in six countries in sub-Saharan Africa and South Asia. In doing so, the book addresses a notable gap in recent research on social protection concerning the politics of implementation. While considerable attention has been devoted to debating the merits of different policy designs and the political factors shaping the adoption and diffusion of different policy models, ultimately the ability of any social transfer programme to deliver on its promises is dependent on the effective implementation and distribution of social transfers in line with intended objectives. The chapters in this book examine international and sub-national variation in programme implementation in Bangladesh, Ethiopia, Ghana, Kenya, Nepal, and Rwanda, drawing on a common analytical framework that highlights the importance of state capacity and reach, rooted in histories of state formation, and contemporary political competition in shaping the distribution of social transfers. Comparative analysis of the case studies supports the view that variation in the capacity and reach of the state within countries is a centrally important factor shaping the effectiveness and impartiality of distribution. Yet state capacity alone is insufficient. Rather, political competition and power relations shape how this capacity is actually deployed in practice. As such, the book underscores the inherently political nature of implementation and questions common technocratic efforts to improve implementation by de-politicizing the social protection policy process.
    Keywords: social protection, social transfer, policy implementation, political economy, power relations, state capacity, Africa, South Asia ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics::KCP Political economy ; bic Book Industry Communication::J Society & social sciences::JF Society & culture: general::JFF Social issues & processes ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GT Interdisciplinary studies::GTF Development studies ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics::KCM Development economics & emerging economies
    Language: English
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    Movements After Revolution (2022)
    Oxford University Press
    Details
    Publication Date: 2022-07-16
    Keywords: Agrarian Movement;Communism;Communist Party;Labor Movement;Land Reform;Latin America;Mexican Revolution;Modern Mexico;People’s Movement;Popular Movement ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPW Political activism::JPWQ Revolutionary groups & movements ; bic Book Industry Communication::H Humanities::HB History
    Language: English
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    Chapter Disabilities and wellbeing (2022)
    Oxford University Press | Oxford Handbook of Philosophy and Disability
    Details
    Publication Date: 2024-04-05
    Description: This chapter argues for a normative distinction between disabilities that are inherently negative with respect to wellbeing and disabilities that are inherently neutral with respect to wellbeing. First, after clarifying terms I discuss recent arguments according to which possession of a disability is inherently neutral with respect to wellbeing. I note that though these arguments are compelling, they are only intended to cover certain disabilities, and in fact there exists a broad class regarding which they do not apply. In section three I discuss two such problem cases: Locked-in Syndrome and the Minimally Conscious State. In section four I explain why these are cases in which possession of the disability makes one worse off overall. I do so by explicating the notion of control over one’s situation. I argue that disabilities that significantly impair control over one’s own situation – e.g., Locked-in Syndrome and the Minimally Conscious State – strongly tend to be inherently negative with respect to wellbeing, while disabilities that do not strongly tend to be inherently neutral. The upshot is that we must draw an important normative distinction between disabilities that undermine this kind of control, and disabilities that do not.
    Keywords: wellbeing, Minimally Conscious State, Locked-in Syndrome, control over one’s situation ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy
    Language: English
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    Particle Physics in the LHC era (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-05
    Description: This book gives a modern introduction to particle physics. The main mathematical tools required for the rest of the book are developed in Chapter 2. A quantitative introduction to accelerator physics is presented in Chapter 3. Chapter 4 covers detector physics, with an emphasis on fundamental physical principles. Chapter 5 covers the static quark model, with applications to light mesons and baryons as well as heavier states containing charm and beauty quarks. Chapter 6 introduces relativistic quantum mechanics and uses spinors to relate Lorentz invariance to the Dirac equation. Chapter 7 covers the basics of the electroweak theory based on broken SU(2) × U(1) symmetry. Chapter 8 reviews some of the key experiments that led to the development of the electroweak theory. Chapter 9 explains the importance of deep inelastic scattering data for providing direct evidence for the existence of quarks. It also gives a brief introduction to quantum chromodynamics (QCD). Chapter 10 considers flavour oscillations in the quark sector and then discusses the evidence for CP violation. Chapter 11 examines the theory of neutrino oscillations as well as the evidence for these oscillations. Chapter 12 gives an elementary introduction to the Higgs mechanism as well as a careful explanation of the experimental evidence for the existence of a Higgs boson. Chapter 13 looks at LHC physics and explains how searches for Beyond the Standard Model Physics are performed. It concludes with a discussion of the evidence for dark matter and dark energy.
    Keywords: Particle physics, nuclear physics, astrophysics, cosmology, accelerator physics, detector physics, quarks and leptons, Dirac equation, electroweak theory, quantum chromodynamics, flavour oscillations, CP violation, Higgs boson, Beyond the Standard Model physics ; thema EDItEUR::P Mathematics and Science::PH Physics::PHP Particle and high-energy physics ; thema EDItEUR::P Mathematics and Science::PH Physics::PHN Nuclear physics ; thema EDItEUR::P Mathematics and Science::PH Physics::PHV Applied physics::PHVB Astrophysics ; thema EDItEUR::P Mathematics and Science::PG Astronomy, space and time::PGK Cosmology and the universe ; thema EDItEUR::P Mathematics and Science::PH Physics::PHM Atomic and molecular physics
    Language: English
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    A Featural Typology of Bantu Agreement (2022)
    Oxford University Press
    Details
    Publication Date: 2024-03-24
    Description: The Bantu languages are in some sense remarkably uniform (SVO basic word order, noun classes, verbal morphology), but this extensive language family also show a wealth of morphosyntactic variation. Two core areas in which such variation is attested are subject and object agreement. The book explores the variation in Bantu subject and object marking on the basis of data from 75 Bantu languages, discovering striking patterns (the RANDOM and the AWSOM correlation), and providing a novel syntactic analysis. This analysis takes into account not just phi agreement, but also nominal licensing and information structure. A Person feature, associated with animacy, definiteness, or givenness, is shown to be responsible for differential object agreement, while at the same time accounting for doubling vs. non-doubling object marking – a hybrid solution to an age-old debate in Bantu comparative morphosyntax. It is furthermore proposed that low functional heads can Case-license flexibly downwards or upwards, depending on the relative topicality of the two arguments involved. This accounts for the properties of symmetric object marking in ditransitives (for Appl), and subject inversion constructions (for v). By keeping Agree constant and systematically determining which featural parameters are responsible for the attested variation, the proposed analysis argues for an emergentist view of features and parameters (following Biberauer 2018, 2019), and against both Strong Uniformity and Strong Modularity.
    Keywords: Bantu languages, agreement, Agree, comparative morphosyntax, Case, information structure, nominal licensing, Person, Topic, subject marking, object marking, crosslinguistic variation ; thema EDItEUR::C Language and Linguistics::CF Linguistics::CFK Grammar, syntax and morphology ; thema EDItEUR::C Language and Linguistics::CF Linguistics::CFF Historical and comparative linguistics ; thema EDItEUR::2 Language qualifiers::2H African languages::2HC Niger-Congo languages::2HCB Bantu languages
    Language: English
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    How to Achieve Inclusive Growth (2022)
    Oxford University Press
    Details
    Publication Date: 2024-03-30
    Description: Rising inequality and widespread poverty, social unrest and polarization, gender and ethnic disparities, declining social mobility, economic fragility, unbalanced growth due to technology and globalization, and existential danger from climate change are urgent global concerns of our day. These issues are intertwined. They therefore require a holistic framework to examine their interplay and bring the various strands together. This book brings together leading academic economists and experts from several international institutions to explain the sources and scale of these challenges. The book summarizes a wide array of empirical evidence and country experiences, lays out practical policy solutions, and devises a comprehensive and unified plan of action for combatting these economic and social disparities. This authoritative book is accessible to policy makers, students, and the general public interested in how to craft a brighter future by building a sustainable, green, and inclusive society in the years ahead.
    Keywords: Inclusive growth, growth, inequality, equality, poverty, development, climate change, disparities, income distribution, economic policy ; thema EDItEUR::K Economics, Finance, Business and Management::KC Economics ; thema EDItEUR::K Economics, Finance, Business and Management::KC Economics::KCV Economics of specific sectors::KCVG Environmental economics ; thema EDItEUR::K Economics, Finance, Business and Management::KC Economics::KCG Economic growth ; thema EDItEUR::K Economics, Finance, Business and Management::KC Economics::KCA Economic theory and philosophy
    Language: English
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    Bell Nonlocality (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-05
    Description: Nonlocality was discovered by John Bell in 1964, in the context of the debates about quantum theory, but is a phenomenon that can be studied in its own right. Its observation proves that measurements are not revealing pre-determined values, falsifying the idea of “local hidden variables” suggested by Einstein and others. One is then forced to make some radical choice: either nature is intrinsically statistical and individual events are unspeakable, or our familiar space-time cannot be the setting for the whole of physics. As phenomena, nonlocality and its consequences will have to be predicted by any future theory, and may possibly play the role of foundational principles in these developments. But nonlocality has found a role in applied physics too: it can be used for “device-independent” certification of the correct functioning of random number generators and other devices. After a self-contained introduction to the topic, this monograph on nonlocality presents the main tools and results following a logical, rather than a chronological, order.
    Keywords: Nonlocality, Bell’s theorem, John Bell, quantum entanglement, Einstein-Podolsky-Rosen, device-independent, quantum foundations, local hidden variables, local realism, spooky action ; thema EDItEUR::P Mathematics and Science::PH Physics::PHQ Quantum physics (quantum mechanics and quantum field theory) ; thema EDItEUR::P Mathematics and Science::PH Physics::PHP Particle and high-energy physics ; thema EDItEUR::U Computing and Information Technology::UY Computer science
    Language: English
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    Rethinking Moral Status (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-14
    Description: Common-sense morality implicitly assumes that reasonably clear distinctions can be drawn between the ‘full’ moral status usually attributed to ordinary adult humans, the partial moral status attributed to non-human animals, and the absence of moral status, usually ascribed to machines and other artefacts. These assumptions were always subject to challenge; but they now come under renewed pressure because there are beings we are now able to create, and beings we may soon be able to create, which blur traditional distinctions between humans, non-human animals, and non-biological beings. Examples are human non-human chimeras, cyborgs, human brain organoids, post-humans, human minds that have been uploaded into computers and onto the internet, and artificial intelligence. It is far from clear what moral status we should attribute to any of these beings. While commonsensical views of moral status have always been questioned, the latest technological developments recast many of the questions and raise additional objections. There are a number of ways we could respond, such as revising our ordinary suppositions about the prerequisites for full moral status. We might also reject the assumption that there is a sharp distinction between full and partial moral status. The present volume provides a forum for philosophical reflection about the usual presuppositions and intuitions about moral status, especially in light of the aforementioned recent and emerging technological advances.
    Keywords: morality, moral status, chimera, cyborg, human brain organoid, post human, non-human animal, artificial intelligence ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYQ Artificial intelligence
    Language: English
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    The Changing German Voter (2022)
    Oxford University Press
    Details
    Publication Date: 2022-06-11
    Description: Over the past half century, the behavior of German voters has changed profoundly—at first rather gradually but during the last decade at accelerated speed. Electoral decision-making has become much more volatile, rendering election outcomes less predictable. Party system fragmentation intensified sharply. The success of the Alternative for Germany (AfD) put an end to Germany’s exceptionality as one of the few European countries without a strong right-wing populist party. Utilizing a wide range of data compiled by the German Longitudinal Election Study, the book examines changing voters’ behavior in the context of changing parties, campaigns, and media during the period of its hitherto most dramatically increased fluidity at the 2009, 2013, and 2017 federal elections. Guided by the notions of realignment and dealignment, the study addresses three questions: How did the turbulences that increasingly characterize German electoral politics come about? How did they in turn condition voters’ decision-making? How were voters’ attitudes and choices affected by situational factors that pertained to the specifics of particular elections? The book demonstrates how traditional cleavages lost their grip on voters and a new socio-cultural line of conflict became the dominant axis of party competition. A series of major crises, but also programmatic shifts of the established parties promoted this development. It led to a segmentation of the party system that pits the right-wing populist AfD against the traditional parties. The book also demonstrates the relevance of coalition preferences, candidate images as well as media and campaign effects for voters’ attitudes, beliefs, and preferences.
    Keywords: Germany, electoral behavior, electoral change, party system development, realignment, dealignment, party competition, socio-economic conflict dimension, socio-cultural conflict dimension, right-wing populism ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPA Political science & theory ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPB Comparative politics ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPH Political structure & processes::JPHF Elections & referenda ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPH Political structure & processes ; bic Book Industry Communication::1 Geographical Qualifiers::1D Europe::1DF Central Europe::1DFG Germany
    Language: English
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    Future Morality (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-05
    Description: The world is changing so fast that it's hard to know how to think about what we ought to do. We barely have time to reflect on how scientific advances will affect our lives before they're upon us. New kinds of dilemma are springing up. Can robots be held responsible for their actions? Will artificial intelligence be able to predict criminal activity? Is the future gender-fluid? Should we strive to become post-human? Should we use drugs to improve our intimate relationships — or to reduce crime? Our intuitions about questions like these are often both weak and confused. David Edmonds has put together a philosophical task force to get to grips with these challenges. Twenty-nine philosophers present provocative and engaging pieces about aspects of life today, and life tomorrow — birth and death, health and medicine, brain and body, personal relationships, wrongdoing and justice, the internet, animals, and the environment. The future won't look the same when you've finished this book.
    Keywords: philosophy; moral philosophy; social & political philosophy ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy
    Language: English
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    Voices in Psychosis (2022)
    Oxford University Press
    Details
    Publication Date: 2022-09-10
    Description: Voices in Psychosis: Interdisciplinary Perspectives deepens and extends the understanding of hearing voices in psychosis in a striking way. For the first time, this collection brings multiple disciplinary, clinical and experiential perspectives to bear on an original and extraordinarily rich body of testimony: transcripts of forty in-depth phenomenological interviews conducted with people who hear voices and who have accessed Early Intervention in Psychosis services. Voice-hearing experiences associated with psychosis are highly varied, frequently distressing, poorly understood, and deeply stigmatized, even within mental health services. Voices in Psychosis responds to the urgent need for new ways of listening to and making sense of these experiences. The book addresses the social, clinical and research contexts in which the interviews took place, thoroughly investigating the embodied, multisensory, affective, linguistic, spatial, and relational qualities of voice-hearing experiences. The nature, politics, and consequences of these analytic endeavours is a focus of critical reflection throughout. This volume presents a collection of essays by members and associates of the Hearing the Voice project that were written in response to the transcripts. Each chapter gives a multifaceted insight into the experiences of voice-hearers in the North East of England and to their wider resonance in contexts ranging from medieval mysticism to Amazonian shamanism, from the nineteenth-century novel to the twenty-first-century survivor movement.
    Keywords: voice-hearing, phenomenology, interdisciplinarity, psychosis, mental health services, trauma ; bic Book Industry Communication::J Society & social sciences::JM Psychology::JMP Abnormal psychology ; bic Book Industry Communication::J Society & social sciences::JM Psychology::JMQ Psychology: emotions ; bic Book Industry Communication::J Society & social sciences::JM Psychology::JMS The self, ego, identity, personality ; bic Book Industry Communication::M Medicine::MM Other branches of medicine::MMH Psychiatry ; bic Book Industry Communication::J Society & social sciences::JK Social services & welfare, criminology::JKS Social welfare & social services::JKSM Care of the mentally ill
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    Dancing the World Smaller (2022)
    Oxford University Press
    Details
    Publication Date: 2024-03-24
    Description: This book examines international dance performances in New York City in the 1940s as sites in which dance artists and audiences contested what it meant to practice globalism in mid-twentieth-century America. Debates over globalism in dance proxied larger cultural struggles over how to reconcile the nation’s new role as a global superpower. In dance as in cultural politics, Americans labored over how to realize diversity while honoring difference and manage dueling impulses toward globalism, on the one hand, and isolationism, on the other.
    Keywords: Performing arts, dance, ballet, modern dance, world dance, dance, globalism, internationalism, modernism, ethnic, ethnologic, New York City, 1940s, mid-century, mid-twentieth century ; thema EDItEUR::A The Arts::AT Performing arts::ATQ Dance ; thema EDItEUR::A The Arts::AT Performing arts::ATX Other performing arts
    Language: English
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    Public Law and Economics (2022)
    Oxford University Press
    Details
    Publication Date: 2023-03-03
    Description: This comprehensive textbook applies economic analysis to public law. The economic analysis of law has revolutionized legal scholarship and teaching in the last half-century, but it has focused mostly on private law, business law, and criminal law. This book extends the analysis to fundamental topics in public law, such as the separation of government powers, regulation by agencies, constitutional rights, and elections. Every public law involves six fundamental processes of government: bargaining, voting, entrenching, delegating, adjudicating, and enforcing. The book devotes two chapters to each process, beginning with the economic theory and then applying the theory to a wide range of puzzles and problems in law. Each chapter concentrates on cases and legal doctrine, showing the relevance of economics to the work of lawyers and judges. Featuring lucid, accessible writing and engaging examples, the book addresses enduring topics in public law as well as modern controversies, including gerrymandering, voter identification laws, and qualified immunity for police.
    Keywords: law and economics, interpretive economics, constitutional economics, economics of rights, economics of bargaining, economics of voting, economics of entrenchment, economics of delegation, economics of adjudication, economics of enforcement ; bic Book Industry Communication::L Law::LB International law::LBB Public international law ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics ; bic Book Industry Communication::L Law::LB International law
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    Sacred Rivals (2022)
    Oxford University Press | OUP USA
    Details
    Publication Date: 2024-04-08
    Description: France;Algeria;Ottoman Syria;Islam;Catholicism;Catholic Orientalism;Imperialism;Missions;Jesuits;Louis Veuillot;Melchior de Vogüé;Charles Lavigerie;White Fathers;Humanitarianism;Œuvre d'Orient;Civilizing Mission
    Keywords: France;Algeria;Ottoman Syria;Islam;Catholicism;Catholic Orientalism;Imperialism;Missions;Jesuits;Louis Veuillot;Melchior de Vogüé;Charles Lavigerie;White Fathers;Humanitarianism;Œuvre d'Orient;Civilizing Mission ; bic Book Industry Communication::H Humanities::HR Religion & beliefs::HRA Religion: general::HRAX History of religion ; bic Book Industry Communication::H Humanities::HB History::HBJ Regional & national history::HBJD European history ; bic Book Industry Communication::H Humanities::HB History::HBT History: specific events & topics::HBTQ Colonialism & imperialism ; thema EDItEUR::Q Philosophy and Religion::QR Religion and beliefs::QRA Religion: general::QRAX History of religion ; thema EDItEUR::N History and Archaeology::NH History::NHD European history ; thema EDItEUR::N History and Archaeology::NH History::NHT History: specific events and topics::NHTQ Colonialism and imperialism
    Language: English
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    Chapter (When) Is Adblocking Wrong? (2022)
    Oxford University Press
    Details
    Publication Date: 2022-11-22
    Description: In this chapter, I examine three deontological objections to adblocking: the objection from property (according to which adblocking involves accessing another’s property without satisfying the conditions placed on such access by the owner), the objection from complicity (according to which, by blocking ads, consumers become complicit in wrongdoing of adblocking software providers), and the objection from freeriding (according to which adblocking consumers free-ride on other consumers who allow ads to be served). I argue that, though these objections plausibly establish the moral impermissibility of some instances of adblocking, they do not, even collectively, establish a blanket moral prohibition on adblocking, as it is currently done.
    Keywords: Adblocking, Piracy, Theft, Intellectual Property, Complicity, Extortion, Free-Riding ; bic Book Industry Communication::L Law::LN Laws of Specific jurisdictions::LNR Intellectual property law
    Language: English
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    Empires and Communities in the Post-Roman and Islamic World, c. 400 – 1000 CE (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-01
    Description: This book deals with the ways in which empires affect smaller communities – for instance, ethnic groups, religious communities, local or peripheral populations. It addresses Byzantinium, the early Islamic World and the West in the 5th to 10th centuries CE, a period with a particular dynamic of imperial formation and decline in Europe and the Mediterranean.
    Description: Dieser Band beschäftigt sich mit den Auswirkungen von Imperien auf kleinere Gemeinschaften – zum Beispiel ethnische verbände, religiöse Gemeinschaften, lokale oder periphere Bevölkerungen. Behnadelt werden Byzanz, die frühislamische Welt und der Westen im 5.-10. Jahrhundert n. Chr., eine Zeit von besonders dynamischen Prozessen von Neubildung und verfall von Imperien in Europa und dem Mittelmeeraum.
    Keywords: Imperien – Geschichte – vor 1500; Zivilisation, mittelalterliche; Mittelalter; Islamisches Imperium, Geschichte; Ethnizität, Geschichte, bis 1500; Ost und West ; ÖFOS 2012, Byzantinistik ; ÖFOS 2012, Globalgeschichte ; ÖFOS 2012, Islam ; Imperialism—History—To 1500; Civilization, Medieval; Middle Ages; Islamic Empire—History; Ethnicity—History—To 1500; East and West (nach LCSH) ; ÖFOS 2012, Byzantine studies ; ÖFOS 2012, Global history ; ÖFOS 2012, Islam ; thema EDItEUR::N History and Archaeology ; thema EDItEUR::3 Time period qualifiers::3K CE period up to c 1500 ; thema EDItEUR::N History and Archaeology::NH History::NHD European history ; thema EDItEUR::N History and Archaeology::NH History::NHG Middle Eastern history
    Language: English
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    Sick Note (2022)
    Oxford University Press
    Details
    Publication Date: 2024-04-02
    Description: Sick Note is a history of how the British state asked, ‘who is really sick?’ Tracing medical certification for absence from work from 1948 to 2010, it shows that doctors, employers, employees, politicians, media commentators, and citizens each concerned themselves with measuring sickness. At various times, each understood that a signed note from a doctor was not enough to ‘prove’ whether someone was ‘really’ sick. Yet, with no better alternative on offer, the sick note survived in practice and in the popular imagination—just like the welfare state itself. Sick Note reveals the interplay between medical, employment, and social security policy. The physical note became an integral part of working and living in Britain, while the term ‘sick note’ was often deployed rhetorically as a mocking nickname or symbol of Britain’s economic and political troubles. Using government policy documents, popular media, internet archives, and contemporary research, this book covers the evolution of medical certification and the welfare state since the Second World War, demonstrating how sickness and disability policies responded to demographic and economic changes—though not always satisfactorily for administrators or claimants. Moreover, despite the creation of ‘the fit note’ in 2010, the idea of ‘the sick note’ has remained. With the specific challenges posed by the global pandemic in the early 2020s, Sick Note shows how the question of ‘who is really sick?’ has never been straightforward and will continue to perplex the British state.
    Keywords: history, welfare, United Kingdom, social security, medicine, employment, absenteeism, disability, politics ; thema EDItEUR::N History and Archaeology::NH History::NHD European history ; thema EDItEUR::N History and Archaeology ; thema EDItEUR::3 Time period qualifiers::3M c 1500 onwards to present day ; thema EDItEUR::N History and Archaeology::NH History::NHT History: specific events and topics::NHTB Social and cultural history ; thema EDItEUR::M Medicine and Nursing::MB Medicine: general issues::MBX History of medicine
    Language: English
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    India in the Persian World of Letters (2022)
    Oxford University Press
    Details
    Publication Date: 2024-03-24
    Description: This study traces the development of philology (the analysis of literary language) in the Persian tradition in India, concentrating on its socio-political ramifications. The most influential Indo-Persian philologist of the eighteenth century was Sirāj al-Dīn ʿAlī Ḳhān (d. 1756), whose pen-name was Ārzū. Besides being a respected poet, Ārzū was a rigorous theoretician of language whose intellectual legacy was side-lined by colonialism. His conception of language accounted for literary innovation and historical change in part to theorize the tāzah-goʾī [literally, “fresh-speaking”] movement in Persian literary culture. Although later scholarship has tended to frame this debate in anachronistically nationalist terms (Iranian native speakers versus Indian imitators), the primary sources show that contemporary concerns had less to do with geography than with the question of how to assess innovative “fresh-speaking” poetry, a situation analogous to the Quarrel of the Ancients and the Moderns in early modern Europe. Ārzū used historical reasoning to argue that as a cosmopolitan language Persian could not be the property of one nation or be subject to one narrow kind of interpretation. Ārzū also shaped attitudes about reḳhtah, the Persianized form of vernacular poetry that would later be renamed and reconceptualized as Urdu, helping the vernacular to gain acceptance in elite literary circles in northern India. This study puts to rest the persistent misconception that Indians started writing the vernacular because they were ashamed of their poor grasp of Persian at the twilight of the Mughal Empire.
    Keywords: Persian, Indo-Persian, Urdu, philology, Sirāj al-Dīn ʿAlī Ḳhān Ārzū, tāzah-goʾī, vernacularization, literary culture, early modern, Mughal Empire ; thema EDItEUR::C Language and Linguistics::CB Language: reference and general::CBX Language: history and general works ; thema EDItEUR::D Biography, Literature and Literary studies::DC Poetry::DCF Poetry by individual poets ; thema EDItEUR::D Biography, Literature and Literary studies::DS Literature: history and criticism::DSC Literary studies: poetry and poets ; thema EDItEUR::C Language and Linguistics::CF Linguistics::CFF Historical and comparative linguistics ; thema EDItEUR::3 Time period qualifiers::3M c 1500 onwards to present day::3ML 18th century, c 1700 to c 1799
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    Improving the ocean and atmosphere in a coupled ocean–atmosphere model by assimilating satellite sea‐surface temperature and subsurface profile data (2020)
    Wiley
    In:  EPIC3Quarterly Journal of the Royal Meteorological Society, Wiley, 146(733), pp. 4014-4029, ISSN: 0035-9009
    Details
    Publication Date: 2023-06-21
    Description: An ensemble-based data assimilation framework for a coupled ocean–atmosphere model is applied to investigate the influence of assimilating different types of ocean observations on the ocean and atmosphere simulation. The data assimilation is performed with the parallel data assimilation framework (PDAF) for the climate model AWI-CM. Observations of the ocean, namely satellite sea-surface temperature (SST) and temperature and salinity profiles, are assimilated into the ocean component. The atmospheric state is only influenced by the model dynamics. Different assimilation scenarios were carried out with different combinations of observations to investigate to what extent the assimilation into the coupled model leads to a better estimation of the state of the ocean as well as the atmosphere. The influence of the data assimilation is assessed by comparing the ocean prediction with dependent and independent ocean observations. For the atmosphere, the assimilation result is compared with the ERA-Interim atmospheric reanalysis data. The ocean temperature and salinity are improved by all the assimilation scenarios in the coupled system. The assimilation leads to a response of the atmosphere throughout the troposphere and impacts the global atmospheric circulation. Globally the temperature and wind speed are improved in the atmosphere on average.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , NonPeerReviewed
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    Annual transcriptome of a key zooplankton species, the copepod Calanus finmarchicus (2022)
    Wiley
    In:  EPIC3Ecology and Evolution, Wiley, 12(e8605)
    Details
    Publication Date: 2023-06-21
    Description: The copepod Calanus finmarchicus (Crustacea, Copepoda) is a key zooplanktonic spe-cies with a crucial position in the North Atlantic food web and significant contributor to ocean carbon flux. Like many other high latitude animals, it has evolved a programmed arrested development called diapause to cope with long periods of limited food sup-ply, while growth and reproduction are timed to take advantage of seasonal peaks in primary production. However, anthropogenic warming is inducing changes in the expected timing of phytoplankton blooms, suggesting phenological mismatches with negative consequences for the N. Atlantic ecosystem. While diapause mechanisms are mainly studied in terrestrial arthropods, specifically on laboratory model species, such as the fruit fly Drosophila, the molecular investigations of annual rhythms in wild marine species remain fragmentary. Here we performed a rigorous year-l ong monthly sampling campaign of C. finmarchicus in a Scottish Loch (UK; 56.45°N, 5.18°W) to generate an annual transcriptome. The mRNA of 36 samples (monthly triplicate of 25 individuals) have been deeply sequenced with an average depth of 137 ± 4 million reads (mean ± SE) per sample, aligned to the reference transcriptome, and filtered. We detail the quality assessment of the datasets and provide a high- quality resource for the investigation of wild annual transcriptomic rhythms (35,357 components) in a key diapausing zooplanktonic species.
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    Transformation of dissolved organic matter by two 〈scp〉Indo‐Pacific〈/scp〉 sponges (2022)
    Wiley
    In:  EPIC3Limnology and Oceanography, Wiley, ISSN: 0024-3590
    Details
    Publication Date: 2023-06-21
    Description: Dissolved organic matter (DOM) is the largest organic carbon reservoir in the ocean and an integral component of biogeochemical cycles. The role of free-living microbes in DOM transformation has been studied thoroughly, whereas little attention has been directed towards the influence of benthic organisms. Sponges are efficient filter feeders and common inhabitants of many benthic communities circumglobally. Here, we investigated how two tropical coral reef sponges shape marine DOM. We compared bacterial abundance, inorganic and organic nutrients in off reef, sponge inhalant, and sponge exhalant water of Melophlus sarasinorum and Rhabdastrella globostellata. DOM and bacterial cells were taken up, and dissolved inorganic nitrogen was released by the two Indo-Pacific sponges. Both sponge species utilized a common set of 142 of a total of 3040 compounds detected in DOM on a molecular formula level via ultrahigh-resolution mass spectrometry. In addition, species-specific uptake was observed, likely due to differences in their associated microbial communities. Overall, the sponges removed presumably semi-labile and semi-refractory compounds from the water column, thereby competing with pelagic bacteria. Within minutes, sponge holobionts altered the molecular composition of surface water DOM (inhalant) into a composition similar to deep-sea DOM (exhalent). The apparent radiocarbon age of DOM increased consistently from off reef and inhalant to exhalant by about 900 14C years for M. sarasinorum. In the pelagic, similar transformations require decades to centuries. Our results stress the dependence of DOM lability definition on the respective environment and illustrate that sponges are hotspots of DOM transformation in the ocean.
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    Biomarker Distributions in (Sub)‐Arctic Surface Sediments and Their Potential for Sea Ice Reconstructions (2020)
    Wiley
    In:  EPIC3Geochemistry Geophysics Geosystems, Wiley, 21(10), pp. e2019GC008629, ISSN: 1525-2027
    Details
    Publication Date: 2023-06-21
    Description: To evaluate the present sea-ice changes in a longer-term perspective the knowledge of sea-ice variability on pre-industrial and geological time scales is essential. For the interpretation of proxy reconstructions it is necessary to understand the recent signals of different sea-ice proxies from various regions. We present 260 new sediment surface samples collected in the (sub-) Arctic Oceans that were analysed for specific sea-ice (IP25) and open-water phytoplankton biomarkers (brassicasterol, dinosterol, HBI III). This new biomarker dataset was combined with 615 previously published biomarker surface samples into a pan-Arctic database. The resulting pan-Arctic biomarker and sea-ice index (PIP25) database shows a spatial distribution correlating well with the diverse modern sea-ice concentrations. We find correlations of PBIP25, PDIP25 and PIIIIP25 with spring and autumn concentrations. Similar correlations with modern sea-ice concentrations are observed in Baffin Bay. However, the correlations of the PIP25 indices with modern sea-ice concentrations differ in Fram Strait from those of the (sub-) Arctic dataset, which is likely caused by region-specific differences in sea-ice variability, nutrient availability and other environmental conditions. The extended (sea-ice) biomarker database strengthens the validity of biomarker sea-ice reconstructions in different Arctic regions and shows how different sea-ice proxies combined may resolve specific seasonal sea-ice signals.
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    A common temperature dependence of nutritional demands in ectotherms (2022)
    Wiley
    In:  EPIC3Ecology Letters, Wiley, ISSN: 1461-023X
    Details
    Publication Date: 2023-06-21
    Description: In light of ongoing climate change, it is increasingly important to know how nutritional requirements of ectotherms are affected by changing temperatures. Here, we analyse the wide thermal response of phosphorus (P) requirements via elemental gross growth efficiencies of Carbon (C) and P, and the Threshold Elemental Ratios in different aquatic invertebrate ectotherms: the freshwater model species Daphnia magna, the marine copepod Acartia tonsa, the marine heterotrophic dinoflagellate Oxyrrhis marina, and larvae of two populations of the marine crab Carcinus maenas. We show that they all share a non-linear cubic thermal response of nutrient requirements. Phosphorus requirements decrease from low to intermediate temperatures, increase at higher temperatures and decrease again when temperature is excessive. This common thermal response of nutrient requirements is of great importance if we aim to understand or even predict how ectotherm communities will react to global warming and nutrient-driven eutrophication.
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    Red and green loops help uncover missing feedbacks in a coral reef social–ecological system (2020)
    Wiley
    In:  EPIC3People and Nature, Wiley, 2(3), pp. 608-618, ISSN: 2575-8314
    Details
    Publication Date: 2023-10-04
    Description: 〈jats:title〉Abstract〈/jats:title〉〈jats:p〉 〈jats:list〉 〈jats:list-item〉〈jats:p〉Social–ecological systems (SES) exhibit complex cause‐and‐effect relationships. Capturing, interpreting, and responding to signals that indicate changes in ecosystems is key for sustainable management in SES. Breaks in this signal–response chain, when feedbacks are missing, will allow change to continue until a point when abrupt ecological surprises may occur.〈/jats:p〉〈/jats:list-item〉 〈jats:list-item〉〈jats:p〉In these situations, societies and local ecosystems can often become uncoupled. In this paper, we demonstrate how the red loop–green loop (RL–GL) concept can be used to uncover missing feedbacks and to better understand past social–ecological dynamics. Reinstating these feedbacks in order to recouple the SES may ultimately create more sustainable systems on local scales.〈/jats:p〉〈/jats:list-item〉 〈jats:list-item〉〈jats:p〉The RL–GL concept can uncover missing feedbacks through the characterization of SES dynamics along a spectrum of human resource dependence. Drawing on diverse qualitative and quantitative data sources, we classify SES dynamics throughout the history of Jamaican coral reefs along the RL–GL spectrum. We uncover missing feedbacks in red‐loop and red‐trap scenarios from around the year 600 until now. The Jamaican coral reef SES dynamics have moved between all four dynamic states described in the RL–GL concept: green loop, green trap, red loop and red trap.〈/jats:p〉〈/jats:list-item〉 〈jats:list-item〉〈jats:p〉We then propose mechanisms to guide the current unsustainable red traps back to more sustainable green loops, involving mechanisms of seafood trade and ecological monitoring. By gradually moving away from seafood exports, Jamaica may be able to return to green‐loop dynamics between the local society and their locally sourced seafood. We discuss the potential benefits and drawbacks of this proposed intervention and give indications of why an export ban may insure against future missing feedbacks and could prolong the sustainability of the Jamaican coral reef ecosystem.〈/jats:p〉〈/jats:list-item〉 〈jats:list-item〉〈jats:p〉Our approach demonstrates how the RL–GL approach can uncover missing feedbacks in a coral reef SES, a way the concept has not been used before. We advocate for how the RL–GL concept in a feedback setting can be used to synthesize various types of data and to gain an understanding of past, present and future sustainability that can be applied in diverse social–ecological settings.〈/jats:p〉〈/jats:list-item〉 〈/jats:list〉 〈/jats:p〉〈jats:p〉A free 〈jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://onlinelibrary.wiley.com/doi/10.1002/pan3.10092/suppinfo"〉Plain Language Summary〈/jats:ext-link〉 can be found within the Supporting Information of this article.〈/jats:p〉
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  • 55
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    Modeling drivers of biodiversity change emphasizes the need for multivariate assessments and rescaled targeting for management (2022)
    Wiley
    In:  EPIC3Conservation Science and Practice, Wiley, 4(10), ISSN: 2578-4854
    Details
    Publication Date: 2023-10-04
    Description: The current policy and goals aimed to conserve biodiversity and manage biodiversity change are often formulated at the global scale. At smaller scales however, biodiversity change is more nuanced leading to a plethora of trends in different metrics of alpha diversity and temporal turnover. Therefore, large-scale policy targets do not translate easily into local to regional management decisions for biodiversity. Using long-term monitoring data from the Wadden Sea (Southern North Sea), joining structural equation models and general dissimilarity models enabled a better overview of the drivers of biodiversity change. Few commonalities emerged as birds, fish, macroinvertebrates, and phytoplankton differed in their response to certain drivers of change. These differences were additionally dependent upon the biodiversity aspect in question and which environmental data were recorded in each monitoring program. No single biodiversity metric or model sufficed to capture all ongoing change, which requires an explicitly multivariate approaches to biodiversity assessment in local ecosystem management.
    Repository Name: EPIC Alfred Wegener Institut
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  • 56
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    Habitat and fishing control grazing potential on coral reefs (2020)
    Wiley
    In:  EPIC3Functional Ecology, Wiley, 34(1), pp. 240-251, ISSN: 0269-8463
    Details
    Publication Date: 2023-10-04
    Description: 〈jats:title〉Abstract〈/jats:title〉〈jats:p〉 〈jats:list〉 〈jats:list-item〉〈jats:p〉Herbivory is a key process on coral reefs, which, through grazing of algae, can help sustain coral‐dominated states on frequently disturbed reefs and reverse macroalgal regime shifts on degraded ones.〈/jats:p〉〈/jats:list-item〉 〈jats:list-item〉〈jats:p〉Our understanding of herbivory on reefs is largely founded on feeding observations at small spatial scales, yet the biomass and structure of herbivore populations is more closely linked to processes which can be highly variable across large areas, such as benthic habitat turnover and fishing pressure. Though our understanding of spatiotemporal variation in grazer biomass is well developed, equivalent macroscale approaches to understanding bottom‐up and top‐down controls on herbivory are lacking.〈/jats:p〉〈/jats:list-item〉 〈jats:list-item〉〈jats:p〉Here, we integrate underwater survey data of fish abundances from four Indo‐Pacific island regions with herbivore feeding observations to estimate grazing rates for two herbivore functions, cropping (which controls turf algae) and scraping (which promotes coral settlement by clearing benthic substrate), for 72 coral reefs. By including a range of reef states, from coral to algal dominance and heavily fished to remote wilderness areas, we evaluate the influences of benthic habitat and fishing on the grazing rates of fish assemblages.〈/jats:p〉〈/jats:list-item〉 〈jats:list-item〉〈jats:p〉Cropping rates were primarily influenced by benthic condition, with cropping maximized on structurally complex reefs with high substratum availability and low macroalgal cover. Fishing was the primary driver of scraping function, with scraping rates depleted at most reefs relative to remote, unfished reefs, though scraping did increase with substratum availability and structural complexity.〈/jats:p〉〈/jats:list-item〉 〈jats:list-item〉〈jats:p〉Ultimately, benthic and fishing conditions influenced herbivore functioning through their effect on grazer biomass, which was tightly correlated to grazing rates. For a given level of biomass, we show that grazing rates are higher on reefs dominated by small‐bodied fishes, suggesting that grazing pressure is greatest when grazer size structure is truncated.〈/jats:p〉〈/jats:list-item〉 〈jats:list-item〉〈jats:p〉Stressors which cause coral declines and clear substrate for turf algae will likely stimulate increases in cropping rates, in both fished and protected areas. In contrast, scraping functions are already impaired at reefs inhabited by people, particularly where structural complexity has collapsed, indicating that restoration of these key processes will require scraper biomass to be rebuilt towards wilderness levels.〈/jats:p〉〈/jats:list-item〉 〈/jats:list〉 〈/jats:p〉〈jats:p〉A free 〈jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://onlinelibrary.wiley.com/doi/10.1111/1365-2435.13457/suppinfo"〉Plain Language Summary〈/jats:ext-link〉 can be found within the Supporting Information of this article.〈/jats:p〉
    Repository Name: EPIC Alfred Wegener Institut
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    Physics-based simulation of sequences with multiple main shocks in Central Italy (2020)
    Oxford University Press
    Details
    Publication Date: 2023-10-26
    Description: This article has been accepted for publication in Geophysical Journal International ©:The Author(s) 2020. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.Uploaded in accordance with the publisher's self-archiving policy. All rights reserved
    Description: The application of a physics-based earthquake simulator to Central Italy allowed the compilation of a synthetic seismic catalogue spanning 100 000 yr, containing more than 300 000 M ≥ 4.0 simulated earthquakes, without the limitations that real catalogues suffer in terms of completeness, homogeneity and time duration. The seismogenic model upon which we applied the simulator code was derived from version 3.2.1 of the Database of Individual Seismogenic Sources (DISS; http://diss.rm.ingv.it/diss/), selecting, and modifying where appropriate, all the fault systems that are recognized in the portion of Central Italy considered in this study, with a total of 54 faults. Besides tectonic stress loading and static stress transfer as in the previous versions, the physical model on which the latest version of our simulation algorithm is based also includes the Rate and State constitutive law that helps to reproduce Omori’s law. One further improvement in our code was also the introduction of trapezoidalshaped faults that perform better than known faults. The resulting synthetic seismic catalogue exhibits typical magnitude, space and time features which are comparable to those in real observations. These features include the total seismic moment rate, the earthquake magnitude distribution, and the short- and medium-term earthquake clustering. A typical aspect of the observed seismicity in Central Italy, aswell as across thewhole Italian landmass and elsewhere, is the occurrence of earthquake sequences characterized by multiple main shocks of similar magnitude. These sequences are different from the usual earthquake clusters and aftershock sequences, since they have at least two main shocks of similar magnitude. Therefore, special attentionwas devoted to verifyingwhether the simulated catalogue includes this notable aspect. For this purpose, we developed a computer code especially for this work to count the number of multiple events contained in a seismic catalogue under a quantitative definition. We found that the last version of the simulator code produces a slightly larger number of multiple events than the previous versions, but not as large as in the real catalogue. A possible reason for this drawback is the lack of components such as pore-pressure changes due to fluid-diffusion in the adopted physical model.
    Description: Published
    Description: 526–542
    Description: 6T. Studi di pericolosità sismica e da maremoto
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 58
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    Temporal declines in Wadden Sea phytoplankton cell volumes observed within and across species (2022)
    Wiley
    In:  EPIC3Limnology and Oceanography, Wiley, 67(2), pp. 468-481, ISSN: 0024-3590
    Details
    Publication Date: 2023-09-27
    Description: Cell size is a master trait in the functional ecology of phytoplankton correlating with numerous morphological, physiological, and life-cycle characteristics of species that constrain their nutrient use, growth, and edibility. In contrast to well-known spatial patterns in cell size at macroecological scales or temporal changes in experimental contexts, few data sets allow testing temporal changes in cell sizes within ecosystems. To analyze the temporal changes of intraspecific and community-wide cell size, we use the phytoplankton data derived from the Lower Saxony Wadden Sea monitoring program, which comprises sample- and species-specific measurements of cell volume from 1710 samples collected over 14 yr. We find significant reductions in both the cell volume of most species and the weighted mean cell size of communities. Mainly diatoms showed this decline, whereas the size of dinoflagellates seemed to be less responsive. The magnitude of the trend indicates that cell volumes are about 30% smaller now than a decade ago. This interannual trend is overlayed by seasonal cycles with smaller cells typically observed in summer. In the subset of samples including environmental conditions, small community cell size was strongly related to high temperatures and low total phosphorus concentration. We conclude that cell size captures ongoing changes in phytoplankton communities beyond the changes in species composition. In addition, based on the changes in species biovolumes revealed by our analysis, we warn that using standard cell size values in phytoplankton assessment will not only miss temporal changes in size, but also lead to systematic errors in biomass estimates over time.
    Repository Name: EPIC Alfred Wegener Institut
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  • 59
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    Drivers of global pre‐industrial patterns of species turnover in planktonic foraminifera (2022)
    Wiley
    In:  EPIC3Ecography, Wiley, 2022(1), ISSN: 0906-7590
    Details
    Publication Date: 2023-09-27
    Description: 〈jats:p〉Anthropogenic climate change is altering global biogeographical patterns. However, it remains difficult to quantify how bioregions are changing because pre‐industrial records of species distributions are rare. Marine microfossils, such as planktonic foraminifera, are preserved in seafloor sediments and allow the quantification of bioregions in the past. Using a recently compiled data set of pre‐industrial species composition of planktonic foraminifera in 3802 worldwide seafloor sediments, we employed multivariate and statistical model‐based approaches to study spatial turnover in order to 1) quantify planktonic foraminifera bioregions and 2) understand the environmental drivers of species turnover. Four latitudinally banded bioregions emerge from the global assemblage data. The polar and temperate bioregions are bi‐hemispheric, supporting the idea that planktonic foraminifera species are not limited by dispersal. The equatorial bioregion shows complex longitudinal patterns and overlaps in sea surface temperature (SST) range with the tropical bioregion. Compositional‐turnover models (Bayesian bootstrap generalised dissimilarity models) identify SST as the strongest driver of species turnover. The turnover rate is constant across most of the SST gradient, showing no SST threshold values with rapid shifts in species composition, but decelerates above 25°C, suggesting SST is less predictive of species composition in warmer waters. Other environmental predictors affect species turnover non‐linearly, and their importance differs across regions. In the Pacific ocean, net primary productivity below 500 mgC m〈jats:sup〉−2〈/jats:sup〉 day〈jats:sup〉−1〈/jats:sup〉 drives fast compositional change. Water depth values below 3000 m (which affect calcareous microfossil preservation) increasingly drive changes in species composition among death assemblages in the Pacific and Indian oceans. Together, our results suggest that the dynamics of planktonic foraminifera bioregions are expected to be highly responsive to climate change; however, at lower latitudes, environmental drivers other than SST may affect these dynamics.〈/jats:p〉
    Repository Name: EPIC Alfred Wegener Institut
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  • 60
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    Failures to disagree are essential for environmental science to effectively influence policy development (2022)
    Wiley
    In:  EPIC3Ecology Letters, Wiley, 25(5), pp. 1075-1093, ISSN: 1461-023X
    Details
    Publication Date: 2023-09-27
    Description: While environmental science, and ecology in particular, is working to provide better understanding to base sustainable decisions on, the way scientific understanding is developed can at times be detrimental to this cause. Locked-in debates are often unnecessarily polarised and can compromise any common goals of the opposing camps. The present paper is inspired by a resolved debate from an unrelated field of psychology where Nobel laureate David Kahneman and Garry Klein turned what seemed to be a locked-in debate into a constructive process for their fields. The present paper is also motivated by previous discourses regarding the role of thresholds in natural systems for management and governance, but its scope of analysis targets the scientific process within complex social-ecological systems in general. We identified four features of environmental science that appear to predispose for locked-in debates: (1) The strongly context-dependent behaviour of ecological systems. (2) The dominant role of single hypothesis testing. (3) The high prominence given to theory demonstration compared investigation. (4) The effect of urgent demands to inform and steer policy. This fertile ground is further cultivated by human psychological aspects as well as the structure of funding and publication systems.
    Repository Name: EPIC Alfred Wegener Institut
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  • 61
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    Low statistical power and overestimated anthropogenic impacts, exacerbated by publication bias, dominate field studies in global change biology (2022)
    Wiley
    In:  EPIC3Global Change Biology, Wiley, 28(3), pp. 969-989, ISSN: 1354-1013
    Details
    Publication Date: 2023-09-27
    Description: Field studies are essential to reliably quantify ecological responses to global change because they are exposed to realistic climate manipulations. Yet such studies are limited in replicates, resulting in less power and, therefore, potentially unreliable effect estimates. Furthermore, while manipulative field experiments are assumed to be more powerful than non-manipulative observations, it has rarely been scrutinized using extensive data. Here, using 3847 field experiments that were designed to estimate the effect of environmental stressors on ecosystems, we systematically quantified their statistical power and magnitude (Type M) and sign (Type S) errors. Our investigations focused upon the reliability of field experiments to assess the effect of stressors on both ecosystem's response magnitude and variability. When controlling for publication bias, single experiments were underpowered to detect response magnitude (median power: 18%–38% depending on effect sizes). Single experiments also had much lower power to detect response variability (6%–12% depending on effect sizes) than response magnitude. Such underpowered studies could exaggerate estimates of response magnitude by 2–3 times (Type M errors) and variability by 4–10 times. Type S errors were comparatively rare. These observations indicate that low power, coupled with publication bias, inflates the estimates of anthropogenic impacts. Importantly, we found that meta-analyses largely mitigated the issues of low power and exaggerated effect size estimates. Rather surprisingly, manipulative experiments and non-manipulative observations had very similar results in terms of their power, Type M and S errors. Therefore, the previous assumption about the superiority of manipulative experiments in terms of power is overstated. These results call for highly powered field studies to reliably inform theory building and policymaking, via more collaboration and team science, and large-scale ecosystem facilities. Future studies also require transparent reporting and open science practices to approach reproducible and reliable empirical work and evidence synthesis.
    Repository Name: EPIC Alfred Wegener Institut
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  • 62
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    Cell size as driver and sentinel of phytoplankton community structure and functioning (2022)
    Wiley
    In:  EPIC3Functional Ecology, Wiley, 36(2), pp. 276-293, ISSN: 0269-8463
    Details
    Publication Date: 2023-09-27
    Description: Body size is a decisive functional trait in many organisms, especially for phytoplankton, which span several orders of magnitude in cell volume. Therefore, the analysis of size as a functional trait driving species’ performance has received wide attention in aquatic ecology, amended in recent decades by studies documenting changes in phytoplankton size in response to abiotic or biotic factors in the environment. We performed a systematic literature review to provide an overarching, partially quantitative synthesis of cell size as a driver and sentinel of phytoplankton ecology. We found consistent and significant allometric relationships between cell sizes and the functional performance of phytoplankton species (cellular rates of carbon fixation, respiration and exudation as well as resource affinities, uptake and content). Size scaling became weaker, absent or even negative when addressing C- or volume-specific rates or growth. C-specific photosynthesis and population growth rate peaked at intermediate cell sizes around 100 µm3. Additionally, we found a rich literature on sizes changing in response to warming, nutrients and pollutants. Whereas small cells tended to dominate under oligotrophic and warm conditions, there are a few notable exceptions, which indicates that other environmental or biotic constraints alter this general trend. Grazing seems a likely explanation, which we reviewed to understand both how size affects edibility and how size structure changes in response to grazing. Cell size also predisposes the strength and outcome of competitive interactions between algal species. Finally, we address size in a community context, where size-abundance scaling describes community composition and thereby the biodiversity in phytoplankton assemblages. We conclude that (a) size is a highly predictive trait for phytoplankton metabolism at the cellular scale, with less strong and nonlinear implications for growth and specific metabolism and (b) size structure is a highly suitable sentinel of phytoplankton responses to changing environments. A free Plain Language Summary can be found within the Supporting Information of this article.
    Repository Name: EPIC Alfred Wegener Institut
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  • 63
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    The Underwater Vision Profiler 6: an imaging sensor of particle size spectra and plankton, for autonomous and cabled platforms (2022)
    Wiley
    In:  EPIC3Limnology and Oceanography Methods, Wiley, 20(2), pp. 115-129, ISSN: 1541-5856
    Details
    Publication Date: 2023-08-01
    Description: Autonomous and cabled platforms are revolutionizing our understanding of ocean systems by providing 4D monitoring of the water column, thus going beyond the reach of ship-based surveys and increasing the depth of remotely sensed observations. However, very few commercially available sensors for such platforms are capable of monitoring large particulate matter (100–2000 μm) and plankton despite their important roles in the biological carbon pump and as trophic links from phytoplankton to fish. Here, we provide details of a new, commercially available scientific camera-based particle counter, specifically designed to be deployed on autonomous and cabled platforms: the Underwater Vision Profiler 6 (UVP6). Indeed, the UVP6 camera-and-lighting and processing system, while small in size and requiring low power, provides data of quality comparable to that of previous much larger UVPs deployed from ships. We detail the UVP6 camera settings, its performance when acquiring data on aquatic particles and plankton, their quality control, analysis of its recordings, and streaming from in situ acquisition to users. In addition, we explain how the UVP6 has already been integrated into platforms such as BGC-Argo floats, gliders and long-term mooring systems (autonomous platforms). Finally, we use results from actual deployments to illustrate how UVP6 data can contribute to addressing longstanding questions in marine science, and also suggest new avenues that can be explored using UVP6-equipped autonomous platforms.
    Repository Name: EPIC Alfred Wegener Institut
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    Front Cover: Transcriptome–proteome compendium of the Antarctic krill (Euphausia superba): Metabolic potential and repertoire of hydrolytic enzymes (2022)
    Wiley
    In:  EPIC3Proteomics, Wiley, 22(18), pp. 2270121-2270121, ISSN: 1615-9853
    Details
    Publication Date: 2023-05-10
    Description: The Antarctic krill (Euphausia superba Dana) is a keystone species in the Southern Ocean that uses an arsenal of hydrolases for biomacromolecule decomposition to effectively digest its omnivorous diet. The present study builds on a hybrid-assembled transcriptome (13,671 ORFs) combined with comprehensive proteome profiling. The analysis of individual krill compartments allowed detection of significantly more different proteins compared to that of the entire animal (1464 vs. 294 proteins). The nearby krill sampling stations in the Bransfield Strait (Antarctic Peninsula) yielded rather uniform proteome datasets. Proteins related to energy production and lipid degradation were particularly abundant in the abdomen, agreeing with the high energy demand of muscle tissue. A total of 378 different biomacromolecule hydrolysing enzymes were detected, including 250 proteases, 99 CAZymes, 14 nucleases and 15 lipases. The large repertoire in proteases is in accord with the protein-rich diet affiliatedwith E. superba’s omnivorous lifestyle and complex biology. The richness in chitin-degrading enzymes allows not only digestion of zooplankton diet, but also the utilisation of the discharged exoskeleton after moulting.
    Repository Name: EPIC Alfred Wegener Institut
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  • 65
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    Environmentally induced functional shifts in phytoplankton and their potential consequences for ecosystem functioning (2022)
    Wiley
    In:  EPIC3Global Change Biology, Wiley, 28(8), pp. 2804-2819, ISSN: 1354-1013
    Details
    Publication Date: 2023-06-21
    Description: Phytoplanktonic organisms are particularly sensitive to environmental change, and, as they represent a direct link between abiotic and biotic compartments within the marine food web, changes in the functional structure of phytoplankton communities can result in profound impacts on ecosystem functioning. Using a trait-based approach, we examined changes in the functional structure of the southern North Sea phytoplankton over the past five decades in relation to environmental conditions. We identified a shift in functional structure between 1998 and 2004 which coincides with a pronounced increase in diatom and decrease in dinoflagellate abundances, and we provide a mechanistic explanation for this taxonomic change. Early in the 2000s, the phytoplankton functional structure shifted from slow growing, autumn blooming, mixotrophic organisms, towards earlier blooming and faster-growing microalgae. Warming and decreasing dissolved phosphorus concentrations were linked to this rapid reorganization of the functional structure. We identified a potential link between this shift and dissolved nutrient concentrations, and we hypothesise that organisms blooming early and displaying high growth rates efficiently take up nutrients which then are no longer available to late bloomers. Moreover, we identified that the above-mentioned functional change may have bottom-up consequences, through a food quality-driven negative influence on copepod abundances. Overall, our study highlights that, by altering the phytoplankton functional composition, global and regional changes may have profound long-term impacts on coastal ecosystems, impacting both food-web structure and biogeochemical cycles.
    Repository Name: EPIC Alfred Wegener Institut
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  • 66
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    Method optimization of the simultaneous detection of B12 congeners leading to the detection of a novel isomer of hydroxycobalamin in seawater (2022)
    Wiley
    In:  EPIC3Rapid Communications in Mass Spectrometry, Wiley, 36(23), pp. e9401-e9401, ISSN: 0951-4198
    Details
    Publication Date: 2023-01-17
    Description: Rationale More than half of surveyed microalgae and over 90% of harmful algae have an obligate requirement for vitamin B12, but methods for directly measuring dissolved B12 in seawater are scarce due to low concentrations and rapid light-induced hydrolysis. Methods We present a method to detect and measure the four main congeners of vitamin B12 dissolved in seawater. The method includes solid-phase extraction, separation by ultrahigh-performance liquid chromatography and detection by triple-quadrupole tandem mass spectrometry utilizing an electrospray ion source. This method was applied to coastal field samples collected in the German Bay, Baltic Sea and the Danish Limfjord system. Results The total dissolved B12 pool ranged between 0.5 and 2.1 pM. Under ambient conditions methyl-B12 and adenosyl-B12 were nearly fully hydrolyzed to hydroxy-B12 in less than 1 h. Hydroxy-B12 and a novel, corresponding isomer were the main forms of B12 found at all field sites. This isomer eluted well after the OH-B12 peak and was also detected in commercially available OH-B12. Both compounds showed very high similarity in their collision-induced dissociation spectra. Conclusions The high instability of the biologically active forms of Me-B12 and Ado-B12 towards hydrolysis was shown, highlighting the importance of reducing the duration of the extraction protocol. In addition, the vitamin B12 pool in the study area was mostly comprised of a previously undescribed isomer of OH-B12. Further studies into the structure of this isomer and its bioavailability are needed.
    Repository Name: EPIC Alfred Wegener Institut
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  • 67
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    Method optimization of the simultaneous detection of B12 congeners leading to the detection of a novel isomer of hydroxycobalamin in seawater (2022)
    Wiley
    In:  EPIC3Rapid Communications in Mass Spectrometry, Wiley, 36(23), pp. e9401-e9401, ISSN: 0951-4198
    Details
    Publication Date: 2023-01-17
    Description: Rationale More than half of surveyed microalgae and over 90% of harmful algae have an obligate requirement for vitamin B12, but methods for directly measuring dissolved B12 in seawater are scarce due to low concentrations and rapid light-induced hydrolysis. Methods We present a method to detect and measure the four main congeners of vitamin B12 dissolved in seawater. The method includes solid-phase extraction, separation by ultrahigh-performance liquid chromatography and detection by triple-quadrupole tandem mass spectrometry utilizing an electrospray ion source. This method was applied to coastal field samples collected in the German Bay, Baltic Sea and the Danish Limfjord system. Results The total dissolved B12 pool ranged between 0.5 and 2.1 pM. Under ambient conditions methyl-B12 and adenosyl-B12 were nearly fully hydrolyzed to hydroxy-B12 in less than 1 h. Hydroxy-B12 and a novel, corresponding isomer were the main forms of B12 found at all field sites. This isomer eluted well after the OH-B12 peak and was also detected in commercially available OH-B12. Both compounds showed very high similarity in their collision-induced dissociation spectra. Conclusions The high instability of the biologically active forms of Me-B12 and Ado-B12 towards hydrolysis was shown, highlighting the importance of reducing the duration of the extraction protocol. In addition, the vitamin B12 pool in the study area was mostly comprised of a previously undescribed isomer of OH-B12. Further studies into the structure of this isomer and its bioavailability are needed.
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  • 68
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    Experiential learning, practices, and space for change: The institutional preconfiguration of community participation in flood risk reduction (2022)
    Wiley
    In:  EPIC3Journal of Flood Risk Management, Wiley, ISSN: 1753-318X
    Details
    Publication Date: 2024-02-07
    Description: Responding to societal challenges requires an understanding of how institutional change happens or does not happen. In the context of flood risk reduction, a central impediment of transformational change is a struggle over how public participation is understood and practiced. Risk institutions are often portrayed as resistant to change, which overlooks the individuals within institutions who struggle to implement innovative power-sharing approaches/arrangements. Using two rounds of qualitative interviews spread over 5 years, this research identifies factions within the risk sector—those who view participation as awareness raising and those who are struggling to make participation part of a wider commitment to power-sharing: a group that, for the purpose of this analysis, we call “mavericks.” Through focus on how mavericks struggle for change, this analysis uncovers tensions that arise as individuals attempt to alter prevailing knowledge-practices. The findings highlight the importance of experiential learning, active listening, and the alteration of space. By applying a relational conceptualisation, we explore how mavericks advocate for relationship building, which alters spaces of public participation and, in that way, lays the foundation for transformational social innovations. The conclusions offer flood risk researchers perspective on the institutional struggles that preconfigure how frontrunner projects are or are not able to facilitate the community participation needed to successfully implement societal transformations.
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  • 69
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    Elemental and biochemical nutrient limitation of zooplankton: A meta‐analysis (2022)
    Wiley
    In:  EPIC3Ecology Letters, Wiley, 25(12), pp. 2776-2792, ISSN: 1461-023X
    Details
    Publication Date: 2023-09-22
    Description: Primary consumers in aquatic ecosystems are frequently limited by the quality of their food, often expressed as phytoplankton elemental and biochemical composition. However, the effects of these food quality indicators vary across studies, and we lack an integrated understanding of how elemental (e.g. nitrogen, phosphorus) and biochemical (e.g. fatty acid, sterol) limitations interactively influence aquatic food webs. Here, we present the results of a meta-analysis using 〉100 experimental studies, confirming that limitation by N, P, fatty acids, and sterols all have significant negative effects on zooplankton performance. However, effects varied by grazer response (growth vs. reproduction), specific manipulation, and across taxa. While P limitation had greater effects on zooplankton growth than fatty acids overall, P and fatty acid limitation had equal effects on reproduction. Furthermore, we show that: nutrient co-limitation in zooplankton is strong; effects of essential fatty acid limitation depend on P availability; indirect effects induced by P limitation exceed direct effects of mineral P limitation; and effects of nutrient amendments using laboratory phytoplankton isolates exceed those using natural field communities. Our meta-analysis reconciles contrasting views about the role of various food quality indicators, and their interactions, for zooplankton performance, and provides a mechanistic understanding of trophic transfer in aquatic environments.
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  • 70
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    Measuring stability in ecological systems without static equilibria (2022)
    Wiley
    In:  EPIC3Ecosphere, Wiley, 13(12), ISSN: 2150-8925
    Details
    Publication Date: 2023-09-22
    Description: Ecological stability refers to a range of concepts used to quantify how species and environments change over time and in response to disturbances. Most empirically tractable ecological stability metrics assume that systems have simple dynamics and static equilibria. However, ecological systems are typically complex and often lack static equilibria (e.g., predator–prey oscillations, transient dynamics, chaos). Failing to account for these factors can lead to biased estimates of stability, in particular, by conflating effects of observation error, process noise, and underlying deterministic dynamics. To distinguish among these processes, we combine three existing approaches: state space models; delay embedding methods; and particle filtering. Jointly, these provide something akin to a deterministically “detrended” version of the coefficient of variation, separately tracking variability due to deterministic dynamics versus stochastic perturbations. Moreover, these variability estimates can be used to forecast dynamics, classify underlying sources of stochastic dynamics, and estimate the “exit time” before a state change takes place (e.g., local extinction events). Importantly, the time-delay embedding methods that we employ make very few assumptions about the functions governing deterministic dynamics, which facilitates applications in systems with limited data and a priori biological knowledge. To demonstrate how complex dynamics without static equilibria can bias ecological stability estimates, we analyze simulated time series of abundance dynamics in a system with time-varying carrying capacity and empirically observed abundance dynamics of the green algae Chlamydomonas terricola grown in a diverse microcosm mixture under variable temperature conditions. We show that stability estimates based on raw observations greatly overestimate temporal variability and fail to accurately forecast time to extinction. In contrast, joint application of state space modeling, delay embedding, and particle filters were able to: (1) correctly quantify the contributions of deterministic versus stochastic variability; (2) successfully estimate “true” abundance dynamics; and (3) correctly forecast time to extinction. Our results therefore demonstrate the importance of accounting for effects of complex, nonstatic dynamics in studies of ecological stability and provide an empirically tractable and flexible toolkit for conducting these measurements.
    Repository Name: EPIC Alfred Wegener Institut
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  • 71
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    Coastal ecosystem engineers and their impact on sediment dynamics: Eelgrass–bivalve interactions under wave exposure (2022)
    Wiley
    In:  EPIC3Limnology and Oceanography, Wiley, 67(3), pp. 621-633, ISSN: 0024-3590
    Details
    Publication Date: 2023-09-18
    Description: Habitat forming ecosystem engineers play critical roles in structuring coastal seascapes. Many ecosystem engineers, such as seagrasses and epifaunal bivalves, are known to have positive effects on sediment stability and increase coastal protection and ecosystem resilience. Others, such as bioturbating infaunal bivalves, may instead destabilize sediment. However, despite the common co-occurrence of seagrasses and bivalves in coastal seascapes, little is known of their combined effects on sediment dynamics. Here, we used wave flumes to compare sediment dynamics in monospecific and multispecific treatments of eelgrass, Zostera marina, and associated bivalves (infaunal Limecola balthica, infaunal Cerastoderma edule, epifaunal Magellana gigas) under a range of wave exposures. Eelgrass reduced bedload erosion rates by 25–50%, with digital elevation models indicating that eelgrass affected the sediment micro-bathymetry by decreasing surface roughness and ripple sizes. Effects of bivalves on sediment mobilization were species-specific; L. balthica reduced erosion by 25%, C. edule increased erosion by 40%, while M. gigas had little effect. Importantly, eelgrass modified the impacts of bivalves: the destabilizing effects of C. edule vanished in the presence of eelgrass, while we found positive additive effects of eelgrass and L. balthica on sediment stabilization and potential for mutual anchoring. Such interspecific interactions are likely relevant for habitat patch emergence and resilience to extreme wave conditions. In light of future climate scenarios where increasing storm frequency and wave exposure threaten coastal ecosystems, our results add a mechanistic understanding of sediment dynamics and interactions between ecosystem engineers, with relevance for management and conservation.
    Repository Name: EPIC Alfred Wegener Institut
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  • 72
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    Seismological constraints on the Mt. Etna (Italy) 2018 flank eruption and implications in the volcano flanks dynamics. (2020)
    Wiley
    Details
    Publication Date: 2023-11-21
    Description: 3D earthquake locations, focal mechanisms and stress tensor distribution in a 16- month interval covering the 2018 Mt. Etna flank eruption, enabled us to investigate the relationship between magma intrusion and structural response of the volcano and shed light on the dynamic processes affecting the instability of Mt. Etna. The magma intrusion likely caused tension in the flanks of the volcano, leading to significant ground deformation and redistribution of stress on the neighbouring faults at the edge of Mt. Etna's unstable sector, encouraging the ESE sliding of the eastern flank of the volcano. Accordingly, FPSs of the post-eruptive events show strike slip faulting mechanisms, under a stress regime characterized by a maximum compressive σ1, NE-SW oriented. In this perspective, any flank eruption could temporarily enhance the sliding process of both the southern and eastern flanks of the volcano.
    Description: Published
    Description: 334-344
    Description: 5V. Processi eruttivi e post-eruttivi
    Description: JCR Journal
    Keywords: Mt. Etna ; volcano
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 73
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    Thermohydrological Impact of Forest Disturbances on Ecosystem‐Protected Permafrost (2022)
    Wiley
    In:  EPIC3Journal of Geophysical Research: Biogeosciences, Wiley, 127(5)
    Details
    Publication Date: 2024-04-23
    Description: Boreal forests cover over half of the global permafrost area and protect underlying permafrost. Boreal forest development, therefore, has an impact on permafrost evolution, especially under a warming climate. Forest disturbances and changing climate conditions cause vegetation shifts and potentially destabilize the carbon stored within the vegetation and permafrost. Disturbed permafrost-forest ecosystems can develop into a dry or swampy bush- or grasslands, shift toward broadleaf- or evergreen needleleaf-dominated forests, or recover to the pre-disturbance state. An increase in the number and intensity of fires, as well as intensified logging activities, could lead to a partial or complete ecosystem and permafrost degradation. We study the impact of forest disturbances (logging, surface, and canopy fires) on the thermal and hydrological permafrost conditions and ecosystem resilience. We use a dynamic multilayer canopy-permafrost model to simulate different scenarios at a study site in eastern Siberia. We implement expected mortality, defoliation, and ground surface changes and analyze the interplay between forest recovery and permafrost. We find that forest loss induces soil drying of up to 44%, leading to lower active layer thicknesses and abrupt or steady decline of a larch forest, depending on disturbance intensity. Only after surface fires, the most common disturbances, inducing low mortality rates, forests can recover and overpass pre-disturbance leaf area index values. We find that the trajectory of larch forests after surface fires is dependent on the precipitation conditions in the years after the disturbance. Dryer years can drastically change the direction of the larch forest development within the studied period.
    Repository Name: EPIC Alfred Wegener Institut
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  • 74
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    In contrast to diatoms, cryptophytes are susceptible to iron limitation, but not to ocean acidification (2022)
    Wiley
    In:  EPIC3Physiologia Plantarum, Wiley, 174(1), ISSN: 0031-9317
    Details
    Publication Date: 2024-05-07
    Description: Previous field studies in the Southern Ocean (SO) indicated an increased occurrence and dominance of cryptophytes over diatoms due to climate change. To gain a better mechanistic understanding of how the two ecologically important SO phytoplankton groups cope with ocean acidification (OA) and iron (Fe) availability, we chose two common representatives of Antarctic waters, the cryptophyte Geminigera cryophila and the diatom Pseudo-nitzschia subcurvata. Both species were grown at 2°C under different pCO2 (400 vs. 900 μatm) and Fe (0.6 vs. 1.2 nM) conditions. For P. subcurvata, an additional high pCO2 level was applied (1400 μatm). At ambient pCO2 under low Fe supply, growth of G. cryophila almost stopped while it remained unaffected in P. subcurvata. Under high Fe conditions, OA was not beneficial for P. subcurvata, but stimulated growth and carbon production of G. cryophila. Under low Fe supply, P. subcurvata coped much better with OA than the cryptophyte, but invested more energy into photoacclimation. Our study reveals that Fe limitation was detrimental for the growth of G. cryophila and suppressed the positive OA effect. The diatom was efficient in coping with low Fe, but was stressed by OA while both factors together strongly impacted its growth. The distinct physiological response of both species to OA and Fe limitation explains their occurrence in the field. Based on our results, Fe availability is an important modulator of OA effects on SO phytoplankton, with different implications on the occurrence of cryptophytes and diatoms in the future.
    Repository Name: EPIC Alfred Wegener Institut
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  • 75
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    Testing the use of the silica deposition fluorescent probe PDMPO to estimate in situ growth rates of diatoms (2022)
    Wiley
    In:  EPIC3Limnology and Oceanography Methods, Wiley, 20(9), pp. 568-580, ISSN: 1541-5856
    Details
    Publication Date: 2024-04-03
    Description: The fluorophore [2-(4-pyridyl)-5{[4-dimethylaminoethyl-aminocarbamoyl-methoxy]phenyl}oxazole], in short PDMPO, is incorporated in newly polymerized silica in diatom frustules and thereby provides a tool to estimate Si uptake, study diatom cell cycles but also determine mortality-independent abundance-based species specific-growth rates in cultures and natural assemblages. In this study, the theoretical framework and applicability of the PDMPO staining technique to estimate diatom species specific-growth rates were investigated. Three common polar diatom species, Pseudo-nitzschia subcurvata, Chaetoceros simplex, and Thalassiosira sp., chosen in order to cover a broad range of species specific frustule and life-cycle characteristics, were incubated over 24 h in control (no PDMPO) and with 0.125 and 0.6 μM PDMPO addition, respectively. Results indicate that specific-growth rates of the species tested were not affected in both treatments with PDMPO addition. The specific-growth rate estimates based on the PDMPO staining patterns (μPDMPO) were comparable and more robust than growth rates estimated from the changes in cell concentrations (μcc). This technique also allowed to investigate and highlight the importance of the illumination cycle (light and dark phases) on cell division in diatoms.
    Repository Name: EPIC Alfred Wegener Institut
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  • 76
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    ‘Destructive fishing’—A ubiquitously used but vague term? Usage and impacts across academic research, media and policy (2022)
    Wiley
    In:  EPIC3Fish and Fisheries, Wiley, 23(5), pp. 1039-1054, ISSN: 1467-2960
    Details
    Publication Date: 2024-04-17
    Description: The term ‘destructive fishing’ appears in multiple international policy instruments intended to improve outcomes for marine biodiversity, coastal communities and sustainable fisheries. However, the meaning of ‘destructive fishing’ is often vague, limiting effectiveness in policy. Therefore, in this study, we systematically reviewed the use of ‘destructive fishing’ in three record types: academic literature, media articles and policy documents between 1976 and 2020. A more detailed analysis was performed on subsets of these records, considering the extent to which the term is characterised, geographic distribution of use, and specific impacts and practices associated with the term. We found that use of ‘destructive fishing’ relative to the generic term ‘fisheries’ has increased since the 1990s. Records focussed predominantly on fishing practices in South-eastern Asia, followed by Southern Asia and Europe. The term was characterised in detail in only 15% of records. Habitat damage and blast/poison fishing were the most associated ecological impacts and gear/practices, respectively. Bottom trawling and unspecified net fishing were regularly linked to destructive fishing. Importantly, the three record types use the term differently. Academic literature tends to specifically articulate the negative impacts, while media articles focus generally on associated gears/practices. Significant regional variation also exists in how the term is used and what phenomena it is applied to. This study provides evidence and recommendations to inform stakeholders in any future pursuit of a unified definition of ‘destructive fishing’ to support more meaningful implementation of global sustainability goals.
    Repository Name: EPIC Alfred Wegener Institut
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  • 77
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    THE CHANGING BIOGEOCHEMICAL CYCLES OF TUNDRA (2022)
    Wiley
    In:  EPIC3Multi‐Scale Biogeochemical Processes in Soil Ecosystems, Multi‐Scale Biogeochemical Processes in Soil Ecosystems, Hoboken, NJ, Wiley, pp. 157-181, ISBN: 9781119480471
    Details
    Publication Date: 2024-04-22
    Description: Tundra is experiencing more intense warming than any other ecosystem on earth. While warming is the most direct effect of climate change on tundra, warming leads to a cascade of environmental changes such as permafrost thaw, altered precipitation regimes, and increased wildfires. This chapter will first focus on how climate change is changing the environment of Arctic and subarctic tundra and then focus on how climate change is altering tundra's carbon, nitrogen, and phosphorus cycles with a focus on soils. Overall, tundra soils are shifting from being a carbon sink into a carbon source as rising temperatures increase microbial activity—a positive feedback to climate change. However, those rising temperatures are also increasing nutrient mineralization rates, which could increase ecosystem carbon storage via enhanced plant productivity as well as increase emissions of nitrous oxide, a powerful greenhouse gas. There is currently a disconnect between the large soil carbon losses measured in many in situ experiments and the strong plant carbon gains predicted by models. Ultimately, more research is needed on the interplay between tundra soils, nutrients, and plants to determine the magnitude of tundra's feedback to climate change.
    Repository Name: EPIC Alfred Wegener Institut
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  • 78
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    Metagenomic survey of the microbiome of ancient Siberian permafrost and modern Kamchatkan cryosols (2022)
    Oxford University Press
    In:  EPIC3microLife, Oxford University Press, 3(1), pp. 1-15, ISSN: 2633-6693
    Details
    Publication Date: 2024-01-30
    Description: In the context of global warming, the melting of arctic permafrost raises the threat of a re-emergence of microorganisms some of which were shown to remain viable in ancient frozen soils for up to half a million years. In order to evaluate this risk, it is of interest to acquire a better knowledge of the composition of the microbial communities found in this understudied environment. Here we present a metagenomics analysis of 12 soil samples from Russian Arctic and subarctic pristine areas: Chukotka, Yakutia, and Kamchatka, including 9 permafrost samples collected at various depths. These large datasets (9.2 1011 total bp) were assembled (525,313 contigs 〉 5kb), their encoded protein contents predicted, then used to perform taxonomical assignments of bacterial, archaeal, and eukaryotic organisms, as well as DNA viruses. The various samples exhibited variable DNA contents and highly diverse taxonomic profiles showing no obvious relationship with their locations, depths or deposit ages. Bacteria represented the largely dominant DNA fraction (95%) in all samples, followed by archaea (3.2%), surprisingly little eukaryotes (0.5%), and viruses (0.4%). Although no common taxonomic pattern was identified, the samples shared unexpected high frequencies of β-lactamase genes, almost 0.9 copy/bacterial genome. In addition of known environmental threats, the particularly intense warming of the Arctic might thus enhance the spread of bacterial antibiotic resistances, today's major challenge in public health. β-lactamases were also observed at high frequency in other types of soils, suggesting their general role in the regulation of bacterial populations.
    Repository Name: EPIC Alfred Wegener Institut
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  • 79
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    COI metabarcoding of large benthic Foraminifera: Method validation for application in ecological studies (2022)
    Wiley
    In:  Ecology and Evolution vol. 12 no. e9549 | H2020 European Institute of Innovation and Technology, Grant/Award Number: 813360; Nederlandse Organisatie voor Wetenschappelijk Onderzoek, Grant/ Award Number: 16.161.301
    Details
    Publication Date: 2024-06-13
    Description: Monitoring community composition of Foraminifera (single-celled marine protists) pro-vides valuable insights into environmental conditions in marine ecosystems. Despitethe efficiency of environmental DNA (eDNA) and bulk-sample DNA (bulk-DNA) me-tabarcoding to assess the presence of multiple taxa, this has not been straightforwardfor Foraminifera partially due to the high genetic variability in widely used ribosomalmarkers. Here, we test the correctness in retrieving foraminiferal communities by me-tabarcoding of mock communities, bulk-DNA from coral reef sediment samples, andeDNA from their associated ethanol preservative using the recently sequenced cy-tochrome c oxidase subunit 1 (COI) marker. To assess the detection success, we com-pared our results with large benthic foraminiferal communities previously reportedfrom the same sampling sites. Results from our mock communities demonstrate thatall species were detected in two mock communities and all but one in the remainingfour. Technical replicates were highly similar in number of reads for each assigned ASVin both the mock communities and bulk-DNA samples. Bulk-DNA showed a signifi-cantly higher species richness than their associated eDNA samples, and also detectedadditional species to what was already reported at the specific sites. Our study con-firms that metabarcoding using the foraminiferal COI marker adequately retrieves thediversity and community composition of both the mock communities and the bulk-DNA samples. With its decreased variability compared with the commonly used nu-clear 18 S rRNA, the COI marker renders bulk-DNA metabarcoding a powerful tool toassess foraminiferal community composition under the condition that the referencedatabase is adequate to the target taxa.
    Keywords: bulk-sample ; DNA ; community composition ; coral reef ; environmental DNA ; foraminifera ; metabarcoding
    Repository Name: National Museum of Natural History, Netherlands
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  • 80
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    Climate, glacial and vegetation history of the polar Ural Mountains since c. 27 cal ka bp, inferred from a 54 m long sediment core from Lake Bolshoye Shchuchye (2022)
    Wiley
    In:  EPIC3Journal of Quaternary Science, Wiley, 37(5), pp. 818-835, ISSN: 0267-8179
    Details
    Publication Date: 2024-06-20
    Description: Because continuous and high-resolution records are scarce in the polar Urals, a multiproxy study was carried out on a 54 m long sediment succession (Co1321) from Lake Bolshoye Shchuchye. The sedimentological, geochemical, pollen and chironomid data suggest that glaciers occupied the lake's catchment during the cold and dry MIS 2 and document a change in ice extent around 23.5–18 cal ka bp. Subsequently, meltwater input, sediment supply and erosional activity decreased as local glaciers progressively melted. The vegetation around the lake comprised open, herb and grass-dominated tundra-steppe until the Bølling-Allerød, but shows a distinct change to probably moister conditions around 17–16 cal ka bp. Local glaciers completely disappeared during the Bølling-Allerød, when summer air temperatures were similar to today and low shrub tundra became established. The Younger Dryas is confined by distinct shifts in the pollen and chironomid records pointing to drier conditions. The Holocene is characterised by a denser vegetation cover, stabilised soil conditions and decreased minerogenic input, especially during the local thermal maximum between c. 10 and 5 cal ka bp. Subsequently, present-day vegetation developed and summer air temperatures decreased to modern, except for two intervals, which may represent the Little Ice Age and Medieval Warm Period.
    Repository Name: EPIC Alfred Wegener Institut
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  • 81
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    Pleistocene glacial and interglacial ecosystems inferred from ancient DNA analyses of permafrost sediments from Batagay megaslump, East Siberia (2022)
    Wiley
    In:  EPIC3Environmental DNA, Wiley, 4(6), pp. 1265-1283, ISSN: 2637-4943
    Details
    Publication Date: 2024-06-18
    Description: Pronounced glacial and interglacial climate cycles characterized northern ecosystems during the Pleistocene. Our understanding of the resultant community transformations and past ecological interactions strongly depends on the taxa found in fossil assemblages. Here, we present a shotgun metagenomic analysis of sedimentary ancient DNA (sedaDNA) to infer past ecosystem-wide biotic composition (from viruses to megaherbivores) from the Middle and Late Pleistocene at the Batagay megaslump, East Siberia. The shotgun DNA records of past vegetation composition largely agree with pollen and plant metabarcoding data from the same samples. Interglacial ecosystems at Batagay attributed to Marine Isotope Stage (MIS) 17 and MIS 7 were characterized by forested vegetation (Pinus, Betula, Alnus) and open grassland. The microbial and fungal communities indicate strong activity related to soil decomposition, especially during MIS17. The local landscape likely featured more open, herb-dominated areas, and the vegetation mosaic supported birds and small omnivorous mammals. Parts of the area were intermittently/partially flooded as suggested by the presence of water-dependent taxa. During MIS 3, the sampled ecosystems are identified as cold-temperate, periodically flooded grassland. Diverse megafauna (Mammuthus, Equus, Coelodonta) coexisted with small mammals (rodents). The MIS 2 ecosystems existed under harsher conditions, as suggested by the presence of cold-adapted herbaceous taxa. Typical Pleistocene megafauna still inhabited the area. The new approach, in which shotgun sequencing is supported by metabarcoding and pollen data, enables the investigation of community composition changes across a broad range of taxonomic groups and inferences about trophic interactions and aspects of soil microbial ecology.
    Repository Name: EPIC Alfred Wegener Institut
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  • 82
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    The Marine Biodiversity Observation Network Plankton Workshops: Plankton Ecosystem Function, Biodiversity, and Forecasting - Research Requirements and Applications (2022)
    ASLO (Association for the Sciences of Limnology and Oceanography) | Wiley
    Details
    Publication Date: 2023-01-04
    Description: Plankton is a massive and phylogenetically diverse group of thousands of prokaryotes, protists (unicellular eukaryotic organisms), and metazoans (multicellular eukaryotic organisms; Fig. 1). Plankton functional diversity is at the core of various ecological processes, including productivity, carbon cycling and sequestration, nutrient cycling (Falkowski 2012), interspecies interactions, and food web dynamics and structure (D'Alelio et al. 2016). Through these functions, plankton play a critical role in the health of the coastal and open ocean and provide essential ecosystem services. Yet, at present, our understanding of plankton dynamics is insufficient to project how climate change and other human-driven impacts affect the functional diversity of plankton. That limits our ability to predict how critical ecosystem services will change in the future and develop strategies to adapt to these changes.
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  • 83
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    The Extreme North African Haboob in October 2008: High‐Resolution Simulation of Organized Moist Convection in the Lee of the Atlas, Dust Recirculation and Poleward Transport (2022)
    AGU (American Geophysical Union) | Wiley
    Details
    Publication Date: 2023-01-04
    Description: This study investigates the mesoscale dynamics involved in the 8–11 October 2008 unseasonably strong African dust episode, during which dust was transported to the Iberian Peninsula (IP). We employ observational datasets and a high-resolution Weather Research and Forecasting model coupled with Chemistry simulations. The analysis shows that during 0900–1200 UTC 9 October, a mesoscale convective system developed over the Atlas Mountains and resulted in a southwestward propagating convective cold pool outflow on the southern foothills of the Anti-Atlas, which lifted dust from the source region. Between 1200 and 1800 UTC 9 October, new moist convection was enhanced over the Atlas Mountains due to intensifying confluence among a heat low, moist southwesterly Atlantic sea-breeze front, and northeasterly flow associated with the convective cold pool near western Algeria. This new moist convection intensified the strength of the convective cold pool outflow and haboob, both of which continued propagating southwestward. At 1200 UTC 10 October, the low-pressure system migrated poleward on the southern slopes of the Anti-Atlas Mountains in association with a mountain-plains solenoidal circulation due to the daytime differential heating between the southern slopes of the Anti-Atlas and nearby atmosphere. The deepening low-pressure and strengthening Atlantic sea-breeze redirected an equatorward advancing dust plume into the poleward direction. The dust plume ultimately crossed the Saharan Atlas Mountains on 11 October and finally impacted the IP. Key Points: - WRF-Chem simulation of an unseasonably strong haboob on the southern slopes of the Atlas Mountains - The equatorward-advancing dust plume was recirculated in the poleward direction by an Atlantic sea-breeze front - The Atlantic sea-breeze front and an intensified upper-level cutoff vortex are instrumental for dust transport over the Iberian Peninsula
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  • 84
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    Uncertainty in Aerosol Optical Depth From Modern Aerosol‐Climate Models, Reanalyses, and Satellite Products (2022)
    AGU (American Geophysical Union) | Wiley
    Details
    Publication Date: 2023-01-24
    Description: Despite the implication of aerosols for the radiation budget, there are persistent differences in data for the aerosol optical depth (τ) for 1998–2019. This study presents a comprehensive evaluation of the large-scale spatio-temporal patterns of mid-visible τ from modern data sets. In total, we assessed 94 different global data sets from eight satellite retrievals, four aerosol-climate model ensembles, one operational ensemble product, two reanalyses, one climatology and one merged satellite product. We include the new satellite data SLSTR and aerosol-climate simulations from the Coupled Model Intercomparison Project Phase 6 (CMIP6) and the Aerosol Comparisons between Observations and Models Phase 3 (AeroCom-III). Our intercomparison highlights model differences and observational uncertainty. Spatial mean τ for 60°N – 60°S ranges from 0.124 to 0.164 for individual satellites, with a mean of 0.14. Averaged τ from aerosol-climate model ensembles fall within this satellite range, but individual models do not. Our assessment suggests no systematic improvement compared to CMIP5 and AeroCom-I. Although some regional biases have been reduced, τ from both CMIP6 and AeroCom-III are for instance substantially larger along extra-tropical storm tracks compared to the satellite products. The considerable uncertainty in observed τ implies that a model evaluation based on a single satellite product might draw biased conclusions. This underlines the need for continued efforts to improve both model and satellite estimates of τ, for example, through measurement campaigns in areas of particularly uncertain satellite estimates identified in this study, to facilitate a better understanding of aerosol effects in the Earth system. Key Points: - Present-day patterns in aerosol optical depth differ substantially between 94 modern global data sets - The range in spatial means from individual satellites is −11% to +17% of the multi-satellite mean - Spatial means from climate model intercomparison projects fall within the satellite range but strong regional differences are identified
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  • 85
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    Observations and Implications of Diurnal Climatology and Trends in Direct and Diffuse Solar Radiation Over China (2022)
    AGU (American Geophysical Union) | Wiley
    Details
    Publication Date: 2023-01-24
    Description: Solar radiation received at the Earth's surface (Rs) is comprised of two components, the direct radiation (Rd) and the diffuse radiation (Rf). Rd, the direct beam from the sun, is essential for concentrated solar power generation. Rf, scattered by atmospheric molecules, aerosols, or cloud droplets, has a fertilization effect on plant photosynthesis. But how Rd and Rf change diurnally is largely unknown owing to the lack of long-term measurements. Taking advantage of 22 years of homogeneous hourly surface observations over China, this study documents the climatological means and evolutions in the diurnal cycles of Rd and Rf since 1993, with an emphasis on their implications for solar power and agricultural production. Over the solar energy resource region, we observe a loss of Rd which is relatively large near sunrise and sunset at low solar elevation angles when the sunrays pass through the atmosphere on a longer pathway. However, the concentrated Rd energy covering an average 10-hr period around noon during a day is relatively unaffected. Over the agricultural crop resource region, the large amounts of clouds and aerosols scattering more of the incoming light result in Rf taking the main proportion of Rs during the whole day. Rf resources and their fertilization effect in the main crop region of China further enhances since 1993 over almost all hours of the day. Key Points: - The loss of direct radiation over China since 1993 is relatively large at sunrise and sunset with little effect on solar power generation - The diffuse component dominates solar radiation normally near sunrise and sunset, but for the whole day over the main sown area of China - The diffuse fraction is further enhanced in the main sown area of China over almost all hours of the day since 1993
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  • 86
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    Advancing Our Functional Understanding of Host–Microbiota Interactions: A Need for New Types of Studies (2020)
    Wiley
    Details
    Publication Date: 2023-02-08
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    Seafloor massive sulphide exploration using deep-towed controlled source electromagnetics: Navigational uncertainties (2020)
    Oxford University Press
    Details
    Publication Date: 2023-02-08
    Description: Deep-towed geophysical surveys require precise knowledge of navigational parameters such as instrument position and orientation because navigational uncertainties reflect in the data and therefore in the inferred geophysical properties of the subseafloor. We address this issue for the case of electrical conductivity inferred from controlled source electromagnetic data. We show that the data error is laterally variable due to irregular motion during deep towing, but also due to lateral variations in conductivity, including those resulting from topography. To address this variability and quantify the data error prior to inversion, we propose a 2-D perturbation study. Our workflow enables stable and geologically reliable results for multicomponent and multifrequency inversions. An error estimation workflow is presented, which comprises the assessment of navigational uncertainties, perturbation of navigational parameters, and forward modelling of electric field amplitudes for a homogeneous and then a heterogeneous subseafloor conductivity model. Some navigational uncertainties are estimated from variations of direct measurements. Other navigational parameters required for inversion are derived from the measured quantities and their error is calculated by means of error propagation. Some navigational parameters show direct correlation with the measured electric fields. For example, the antenna dip correlates with the vertical electric field and the depth correlates with the horizontal electric field. For the perturbation study each standard deviation is added to the navigational parameters. Forward models are run for each perturbation. Amplitude deviations are summed in quadrature with the stacking error for a total, laterally varying, data error. The error estimation is repeated for a heterogeneous subseafloor model due to the large conductivity range (several orders of magnitude), which affects the forward model. The approach enables us to utilize data from several components (multiple electric fields, frequencies and receivers) in the inversion to constrain the final model and reduce ambiguity. The final model is geologically reasonable, in this case enabling the identification of conductive metal sulphide deposits on the seafloor.
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  • 88
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    Response of foundation macrophytes to near‐natural simulated marine heatwaves (2020)
    Wiley
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    Publication Date: 2023-02-08
    Description: Marine heatwaves have been observed worldwide and are expected to increase in both frequency and intensity due to climate change. Such events may cause ecosystem reconfigurations arising from species range contraction or redistribution, with ecological, economic and social implications. Macrophytes such as the brown seaweed Fucus vesiculosus and the seagrass Zostera marina are foundation species in many coastal ecosystems of the temperate northern hemisphere. Hence, their response to extreme events can potentially determine the fate of associated ecosystems. Macrophyte functioning is intimately linked to the maintenance of photosynthesis, growth and reproduction, and resistance against pathogens, epibionts and grazers. We investigated morphological, physiological, pathological and chemical defence responses of western Baltic Sea F. vesiculosus and Z. marina populations to simulated near‐natural marine heatwaves. Along with (a) the control, which constituted no heatwave but natural stochastic temperature variability (0HW), two treatments were applied: (b) two late‐spring heatwaves (June, July) followed by a summer heatwave (August; 3HW) and (c) a summer heatwave only (1HW). The 3HW treatment was applied to test whether preconditioning events can modulate the potential sensitivity to the summer heatwave. Despite the variety of responses measured in both species, only Z. marina growth was impaired by the accumulative heat stress imposed by the 3HW treatment. Photosynthetic rate, however, remained high after the last heatwave indicating potential for recovery. Only epibacterial abundance was significantly affected in F. vesiculosus. Hence both macrophytes, and in particular F. vesiculosus, seem to be fairly tolerant to short‐term marine heatwaves at least at the intensities applied in this experiment (up to 5°C above mean temperature over a period of 9 days). This may partly be due to the fact that F. vesiculosus grows in a highly variable environment, and may have a high phenotypic plasticity.
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  • 89
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    Sedimentology, stratigraphy and architecture of the Nicobar Fan (Bengal–Nicobar Fan System), Indian Ocean: Results from International Ocean Discovery Program Expedition 362 (2020)
    Wiley | IAS (International Association of Sedimentologists)
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    Publication Date: 2023-02-08
    Description: Drill sites in the southern Bay of Bengal at 3°N 91°E (International Ocean Discovery Program Expedition 362) have sampled for the first time a complete section of the Nicobar Fan and below to the oceanic crust. This generally overlooked part of the Bengal–Nicobar Fan System may provide new insights into uplift and denudation rates of the Himalayas and Tibetan Plateau. The Nicobar Fan comprises sediment gravity‐flow deposits, mostly turbidites, that alternate with hemipelagite drapes and pelagite intervals of varying thicknesses. The decimetre‐thick to metre‐thick oldest pre‐fan sediments (limestones/chalks) dated at 69 Ma are overlain by volcanic material and slowly accumulated pelagites (0.5 g cm−2 kyr−1). At Expedition 362 Site U1480, terrigenous input began in the early Miocene at ca 22.5 Ma as muds, overlain by very thin‐bedded and thin‐bedded muddy turbidites at ca 19.5 Ma. From 9.5 Ma, sand content and sediment supply sharply increase (from 1–5 to 10–50 g cm−2 kyr−1). Despite the abundant normal faulting in the Nicobar Fan compared with the Bengal Fan, it offers a better‐preserved and more homogeneous sedimentary record with fewer unconformities. The persistent connection between the two fans ceased at 0.28 Ma when the Nicobar Fan became inactive. The Nicobar Fan is a major sink for Himalaya‐derived material. This study presents integrated results of International Ocean Discovery Program Expedition 362 with older Deep Sea Drilling Project/Ocean Drilling Program/International Ocean Discovery Program sites that show that the Bengal–Nicobar Fan System experienced successive large‐scale avulsion processes that switched sediment supply between the Bengal Fan (middle Miocene and late Pleistocene) and the Nicobar Fan (late Miocene to early Pleistocene). A quantitative analysis of the submarine channels of the Nicobar Fan is also presented, including their stratigraphic frequency, showing that channel size/area and abundance peaked at ca 2 to 3 Ma, but with a distinct low at 3 to 7 Ma: the intervening stratigraphic [sub]unit was a time of reduced sediment accumulation rates.
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  • 90
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    Identification of Icelandic tephras from the last two millennia in the White Sea region (Vodoprovodnoe peat bog, northwestern Russia) (2020)
    Wiley
    Details
    Publication Date: 2023-02-08
    Description: The generation of reliable age models for palaeoenvironmental and archaeological records in the Eurasian Arctic is often problematic when using conventional dating techniques. Tephrochronology can potentially improve the chronologies of such records and synchronise disparate sedimentary archives. However, to date, systematic tephra studies are lacking for this region. This paper presents the first cryptotephra data from the White Sea region (northwestern Russia) based on a peat core spanning the past ~1800 years. We identify seven geochemical glass populations that derive from six Icelandic volcanoes and correlate four of them to north European tephra isochrons; these include Askja ad 1875, the basaltic component of the ad 877 Landnám tephra, and tephras BTD‐15 (c. ad 1750–1650) and SL‐2/SB‐2 (ad 803–767) from unknown eruptions of Katla and Snæfellsjökull, respectively. The remaining three populations originate from Grímsvötn, Hekla and Katla; however, their attribution to individual eruptions remains ambiguous. These findings highlight the potential to extend the Late Holocene tephrochronological framework of northern Europe to the west Eurasian Arctic. The detection of at least three basaltic tephras in the core suggests that basaltic shards can be transported over larger distances than previously known and that peatlands are well suited to preserve such components.
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  • 91
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    Comparative Assessment of Climate Engineering Scenarios in the Presence of Parametric Uncertainty (2020)
    AGU (American Geophysical Union) | Wiley
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    Publication Date: 2023-02-08
    Description: Climate engineering (CE) measures are increasingly discussed when dealing with the adverse impacts of climate change. While much research has focused on individual methods, few studies attempt to compare and rank the effectiveness of these measures. Furthermore, model uncertainties are seldom acknowledged and lesser still, estimated when CE scenarios are assessed. In this work, we quantify the variance in outcomes due to poorly constrained model parameters under several idealized CE scenarios. The four scenarios considered are (1) warming under the high emission scenario Representative Concentration Pathway 8.5 without CE applied and the same emission scenario with (2) afforestation,(3) solar radiation management, and (4) artificial ocean alkalinization. By considering the parametric uncertainty in model outputs, we demonstrate the problems with comparing these scenarios using a single parameter setting. Using statistical emulation, we estimate the probability distributions of several model outcomes. Based on such distributions, we suggest an approach to ranking the effectiveness of the scenarios considered according to their probability of avoiding climate thresholds.
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  • 92
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    A New Improved Estimation of Agulhas Leakage Using Observations and Simulations of Lagrangian Floats and Drifters (2020)
    AGU (American Geophysical Union) | Wiley
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    Publication Date: 2023-02-08
    Description: A new estimate of Agulhas leakage transport is calculated using profiling floats and drifters. Since Richardson's seminal estimate of 15 Sv in 2007, the number of floats and drifters passing through the Agulhas Current has quadrupled. Within uncertainties we find the same leakage percentages as Richardson, with 34% of drifters leaking at the surface and 21% of floats leaking at 1,000 m depth. We find that the drifters tend to follow a northward leakage pathway via the Benguela Current compared to the northwestward leakage pathway of the floats along the Agulhas Ring corridor. We simulate the isobaric and profiling behavior of the floats and drifters using two high resolution models and two offline Lagrangian tracking tools, quantifying for the first time the sampling biases associated with the observations. We find that the isobaric bias cannot be robustly simulated but likely causes an underestimate of observed leakage by one or two Sverdrups. The profiling behavior of the floats causes no significant bias in the leakage. Fitting a simulated vertical leakage profile to the observed leakage percentages from the floats and drifters and using the mean Agulhas transport observed by a moored array at 34°S we find an improved Agulhas leakage transport of 21.3 Sv, with an estimated error of 4.7 Sv. Our new leakage transport is higher primarily because we account for leakage at depths down to 2,000 m, while Richardson considered only the top 1,000 m of the water column.
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    El Niño‐driven oxygenation impacts Peruvian shelf iron supply to the South Pacific Ocean (2020)
    AGU (American Geophysical Union) | Wiley
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    Publication Date: 2023-02-08
    Description: Upwelling ocean currents associated with oxygen minimum zones (OMZs) supply nutrients fuelling intense marine productivity. Perturbations in the extent and intensity of OMZs are projected in the future, but it is currently uncertain how this will impact fluxes of redox‐sensitive trace metal micronutrients to the surface ocean. Here we report seawater concentrations of Fe, Mn, Co, Cd, and Ni alongside the redox indicator iodide/iodate in the Peruvian OMZ during the 2015 El Niño event. The El Niño drove atypical upwelling of oxygen‐enriched water over the Peruvian Shelf, resulting in oxidized iodine and strongly depleted Fe (II), total dissolved Fe, and reactive particulate Fe concentrations relative to non‐El Niño conditions. Observations of Fe were matched by the redox‐sensitive micronutrients Co and Mn, but not by non‐redox‐sensitive Cd and Ni. These observations demonstrate that oxygenation of OMZs significantly reduces water column inventories of redox‐sensitive micronutrients, with potential impacts on ocean productivity. Plain Language Summary Some trace metals, including iron, are essential micronutrients for phytoplankton growth. However, the solubility of iron is very low under oxygenated conditions. Consequently, restricted iron availability in oxygen‐rich seawater can limit phytoplankton growth in the ocean, including in the Eastern Tropical South Pacific. Under typical conditions, depleted oxygen on the South American continental shelf is generally thought to enhance iron supply to the ocean, fuelling phytoplankton productivity in overlying waters. However, the impact of changes in oxygenation, which are predicted to occur in the future, are not known. The 2015 El Niño event led to unusually high oxygen on the Peruvian shelf, offering a system‐scale test on how oxygen influences seawater iron concentrations. We show that El Niño‐driven oxygenation resulted in marked decreases in iron and other metals sensitive to oxygen (cobalt and manganese), whilst metals not sensitive to oxygen (cadmium and nickel) were unaffected. The measured reductions in iron may have led to decreased phytoplankton productivity.
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  • 94
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    Vertical Turbulent Cooling of the Mixed Layer in the Atlantic ITCZ and Trade Wind Regions (2020)
    AGU (American Geophysical Union) | Wiley
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    Publication Date: 2023-02-08
    Description: The causes of the seasonal cycle of vertical turbulent cooling at the base of the mixed layer are assessed using observations from moored buoys in the tropical Atlantic Intertropical Convergence Zone (ITCZ) (4°N, 23°W) and trade wind (15°N, 38°W) regions together with mixing parameterizations and a one-dimensional model. At 4°N the parameterized turbulent cooling rates during 2017–2018 and 2019 agree with indirect estimates from the climatological mooring heat budget residual: both show mean cooling of 25–30 W m (Formula presented.) during November–July, when winds are weakest and the mixed layer is thinnest, and 0–10 W m (Formula presented.) during August–October. Mixing during November–July is driven by variability on multiple time scales, including subdiurnal, near-inertial, and intraseasonal. Shear associated with tropical instability waves (TIWs) is found to generate mixing and monthly mean cooling of 15–30 W m (Formula presented.) during May–July in 2017 and 2019. At 15°N the seasonal cycle of turbulent cooling is out of phase compared to 4°N, with largest cooling of up to 60 W m (Formula presented.) during boreal fall. However, the relationships between wind speed, mixed layer depth, and turbulent mixing are similar: weaker mean winds and a thinner mixed layer in the fall are associated with stronger mixing and turbulent cooling of SST. These results emphasize the importance of seasonal modulations of mixed layer depth at both locations and shear from TIWs at 4°N.
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  • 95
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    Complex eyed pockmarks and submarine groundwater discharge revealed by acoustic data and sediment cores in Eckernförde Bay, SW Baltic Sea (2020)
    AGU (American Geophysical Union) | Wiley
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    Publication Date: 2023-02-08
    Description: Submarine groundwater discharge (SGD) into coastal areas is a common global phenomenon and is rapidly gaining scientific interest due to its influence on marine ecology, the coastal sedimentary environment and its potential as a future freshwater resource. We conducted an integrated study of hydroacoustic surveys combined with geochemical porewater and water column investigations at a well‐known groundwater seep site in Eckernförde Bay (Germany). We aim to better constrain the effects of shallow gas and SGD on high frequency multibeam backscatter data and to present acoustic indications for submarine groundwater discharge. Our high‐quality hydroacoustic data reveal hitherto unknown internal structures within the pockmarks in Eckernförde Bay. Using precisely positioned sediment core samples, our hydroacoustic‐geochemical approach can differentiate intra‐pockmark regimes that were formerly assigned to pockmarks of a different nature. We demonstrate that high‐frequency multibeam data, in particular the backscatter signals, can be used to detect shallow free gas in areas of enhanced groundwater advection in muddy sediments. Intriguingly, our data reveal relatively small (typically 〈15 m across) pockmarks within the much larger, previously mapped, pockmarks. The small pockmarks, which we refer to as “intra‐pockmarks”, have formed due to the localized ascent of gas and groundwater; they manifest themselves as a new type of ‘eyed’ pockmarks, revealed by their acoustic backscatter pattern. Our data suggest that, in organic‐rich muddy sediments, morphological lows combined with a strong multibeam backscatter signal can be indicative of free shallow gas and subsequent advective groundwater flow.
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    The Transpolar Drift as a Source of Riverine and Shelf-Derived Trace Elements to the Central Arctic Ocean (2020)
    AGU (American Geophysical Union) | Wiley
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    Publication Date: 2023-02-08
    Description: A major surface circulation feature of the Arctic Ocean is the Transpolar Drift (TPD), a current that transports river‐influenced shelf water from the Laptev and East Siberian Seas toward the center of the basin and Fram Strait. In 2015, the international GEOTRACES program included a high‐resolution pan‐Arctic survey of carbon, nutrients, and a suite of trace elements and isotopes (TEIs). The cruises bisected the TPD at two locations in the central basin, which were defined by maxima in meteoric water and dissolved organic carbon concentrations that spanned 600 km horizontally and ~25‐50 m vertically. Dissolved TEIs such as Fe, Co, Ni, Cu, Hg, Nd, and Th, which are generally particle‐reactive but can be complexed by organic matter, were observed at concentrations much higher than expected for the open ocean setting. Other trace element concentrations such as Al, V, Ga, and Pb were lower than expected due to scavenging over the productive East Siberian and Laptev shelf seas. Using a combination of radionuclide tracers and ice drift modeling, the transport rate for the core of the TPD was estimated at 0.9 ± 0.4 Sv (106 m3 s‐1). This rate was used to derive the mass flux for TEIs that were enriched in the TPD, revealing the importance of lateral transport in supplying materials beneath the ice to the central Arctic Ocean and potentially to the North Atlantic Ocean via Fram Strait. Continued intensification of the Arctic hydrologic cycle and permafrost degradation will likely lead to an increase in the flux of TEIs into the Arctic Ocean.
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  • 97
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    Habitat light sets the boundaries for the rapid evolution of cichlid fish vision, while sexual selection can tune it within those limits (2020)
    Wiley
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    Publication Date: 2023-02-08
    Description: Cichlid fishes’ famous diversity in body coloration is accompanied by a highly diverse and complex visual system. Although cichlids possess an unusually high number of seven cone opsin genes, they express only a subset of these during their ontogeny, accounting for their astonishing interspecific variation in visual sensitivities. Much of this diversity is thought to have been shaped by natural selection as cichlids inhabit a variety of habitats with distinct light environments. Also, sexual selection might have contributed to the observed visual diversity, and sexual dimorphism in coloration potentially co‐evolved with sexual dimorphism in opsin expression. We investigated sex‐specific opsin expression of several cichlids from Africa and the Neotropics and collected and integrated datasets on sex‐specific body coloration, species‐specific visual sensitivities, lens transmission and habitat light properties for some of them. We comparatively analyzed this wide range of molecular and ecological data, illustrating how integrative approaches can address specific questions on the factors and mechanisms driving diversification, and the evolution of cichlid vision in particular. We found that both sexes expressed opsins at the same levels ‐ even in sexually dimorphic cichlid species – which argues against coevolution of sexual dichromatism and differences in sex‐specific visual sensitivity. Rather, a combination of environmental light properties and body coloration shaped the diversity in spectral sensitivities among cichlids. We conclude that although cichlids are particularly colorful and diverse and often sexually dimorphic, it would appear that natural rather than sexual selection is a more powerful force driving visual diversity in this hyper‐diverse lineage.
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  • 98
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    Trace elements and Li isotope compositions across the Kamchatka arc: Constraints on slab‐derived fluid sources (2020)
    AGU (American Geophysical Union) | Wiley
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    Publication Date: 2023-02-08
    Description: Key Points: - The Kamchatka arc lavas show across-arc variations in chalcophile elements, suggesting that the amount of fluid decreases with depth - Slab-derived fluids have a negligible contribution to the Li budget of the Kamchatka arc lavas - CKD lavas have high U/Th, Li/Y, La/Sm and B/Nb ratios, indicating that lawsonite breakdown reaction dominates the water release Chalcophile elements and lithium (Li) isotopes were measured on lavas from a 220 km transect across the Kamchatka arc in order to investigate the fluid variations below arc volcanoes and to trace the geochemical behaviour of Li in convergent plate margins. From the Eastern Volcanic Front (EVF), through the Central Kamchatka Depression (CKD), into the Sredinny Range (SR) volcanic zones, chalcophile element ratios (e.g., As/Ce and Sb/Ce) show clear across‐arc variations, decreasing (e.g., As/Ce: 0.20 to 0.03 and Sb/Ce: 0.013 to 0.002) with increasing depth above the slab (110 to 400 km). This clearly indicates a gradually decreasing influx of slab‐derived fluids added to the mantle wedge as the slab subducts below Kamchatka. In addition, the anomalously high U/Th, La/Sm and B/Nb ratios in the CKD lavas suggest lawsonite breakdown reaction dominates the fluid release in this area. However, Li/Y (0.07 to 1.78) and δ7Li (+1.8 to +5.4‰, with an exception of +8.6‰ in CKD) show limited variations and values similar to the MORB mantle. A dehydration model suggests that slab‐derived fluids, which are characterized by high Li concentration and high δ7Li, do not control the Li budget in Kamchatka arc lavas. Therefore, the isotopic heavy Li from slab‐derived fluids likely equilibrates in the sub‐arc mantle, which acts as a buffer for Li systematics. In addition, based on the Li isotopic signatures of Klyuchevskoy volcano, our study demonstrates insignificant Li isotopic fractionation during mantle melting and subsequent differentiation.
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    How do microbiota associated with an invasive seaweed vary across scales? (2020)
    Wiley
    Details
    Publication Date: 2023-02-08
    Description: Communities are shaped by scale dependent processes. To study the diversity and variation of microbial communities across scales, the invasive and widespread seaweed Agarophyton vermiculophyllum presents a unique opportunity. We characterized pro‐ and eukaryotic communities associated with this holobiont across its known distribution range, which stretches over the northern hemisphere. Our data reveal that community composition and diversity in the holobiont vary at local but also larger geographic scales. While processes acting at the local scale (i.e., within population) are the main structuring drivers of associated microbial communities, changes in community composition also depend on processes acting at larger geographic scales. Interestingly, the largest analysed scale (i.e., native and non‐native ranges) explained variation in the prevalence of predicted functional groups, which could suggest a functional shift in microbiota occurred over the course of the invasion process. While high variability in microbiota at the local scale supports A. vermiculophyllum to be a generalist host, we also identified a number of core taxa. These geographically independent holobiont members imply that cointroduction of specific microbiota may have additionally promoted the invasion process.
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    Hydrothermal Chimney Distribution on the Endeavour Segment, Juan de Fuca Ridge (2020)
    AGU (American Geophysical Union) | Wiley
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    Publication Date: 2023-02-08
    Description: The Endeavour Segment of the Juan de Fuca Ridge is well known for its abundance of hydrothermal vents and chimneys. One-meter scale multibeam mapping data collected by an autonomous undersea vehicle revealed 572 chimneys along the central 14 km of the segment, although only 47 are named and known to be active. Hydrothermal deposits are restricted to the axial graben and the near-rims of the graben above a seismically mapped axial magma lens. The sparse eruptive activity on the segment during the last 4,300 years has not buried inactive chimneys, as occurs at more magmatically robust mid-ocean ridges.
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