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  • Taylor & Francis  (3,757)
  • Firenze University Press  (3,088)
  • American Institute of Physics
  • 2020-2024  (6,914)
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  • 1
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    Tundra conservation challenged by forest expansion in a complex mountainous treeline ecotone as revealed by spatially explicit tree aboveground biomass modeling (2023)
    Taylor & Francis
    In:  EPIC3Arctic Antarctic and Alpine Research, Taylor & Francis, 55(1), pp. 2220208-2220208, ISSN: 1523-0430
    Details
    Publication Date: 2024-06-21
    Description: The subarctic forest tundra transition zone is one of the most vulnerable ecological regions worldwide and susceptible to climate change. Forest changes could lead to biodiversity losses when tundra areas become colonized. However, the impact of complex landscapes with barriers and channels for seed dispersal is highly understudied. Hence, we investigated potential tree aboveground biomass (AGB) change in mountainous central Chukotka (Siberia) with the individual-based spatially explicit vegetation model Larix vegetation simulator (LAVESI). In a climate sensitivity study, we simulate forest dynamics until 3000 CE for Representative Concentration Pathways (RCPs) with and without hypothetical cooling after 2300 CE to twentieth-century levels. The current state and spatiotemporal dynamics of tree AGB are validated against field and satellite-derived data. Our results suggest densification of existing tree stands and a lagged forest expansion depending on the distance to the current tree line (~39 percent of the total study area, RCP 8.5) under all considered climate scenarios. In scenarios with cooling after 2300 CE, forests stopped expanding and then gradually retreated to their pre-twenty-first-century position (~10 percent, RCP 8.5). However, forest remnants remain in the colonized area, leaving an imprint of forests in former tundra areas, which will likely have an adverse impact on tundra biodiversity.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 2
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    The Dunedin Volcanic Group and a revised model for Zealandia's alkaline intraplate volcanism (2024)
    Taylor & Francis
    Details
    Publication Date: 2024-06-17
    Description: The intraplate rocks of the Dunedin Volcanic Group (DVG) in New Zealand’s South Island erupted in two discrete areas between 25 and 21 Ma before becoming distributed over 〉 7,800 km2 until ∼9 Ma. Although most eruptive centres were of small volume and mainly vented alkaline basanite, the largest centre–the 16–11 Ma composite Dunedin Volcano–discharged basanite and basalt through to trachyte and phonolite. DVG components were mainly derived from mantle sources with 87Sr/86Sr = ∼0.7029, 143Nd/144Nd = ∼0.5129, 206Pb/204Pb = ∼20.0, 207Pb/204Pb = ∼15.65, 208Pb/204Pb = 39.5 and εHf = +3.5 to + 10.1 that extended to anomalously light δ26Mg (−0.47). Exceptions are some potassic basalts in NW of the field with elevated 207Pb/204Pb and more radiogenic Sr. The DVG Sr-Nd-Pb isotopes mostly overlap with metasomatised anhydrous mantle peridotite xenoliths but have less radiogenic Hf, meaning that equivalent anhydrous mantle rock-types cannot be the sole magma sources. Although there is debate regarding whether DVG was derived from the lithospheric or asthenospheric mantle, intermittent melting of a middle lithospheric mantle metasomatised by hydrous asthenosphere-derived melts could account for: (1) the widely distributed magmatism for ∼16 Myr during which time Otago lithosphere shifted NW ∼ 870 km over the asthenosphere; (2) the small chemical range of the least evolved magmas; (3) the Sr-Nd-Pb-Hf isotopic range; and (4) an absence of lower lithosphere mantle xenoliths. This process could account for other occurrences of isotopically restricted Zealandia alkaline intraplate volcanism.
    Description: Published
    Description: 510-529
    Description: OSV2: Complessità dei processi vulcanici: approcci multidisciplinari e multiparametrici
    Description: JCR Journal
    Keywords: Dunedin volcanic Group ; intraplate ; alkaline ; volcanism ; Zealandia ; Petrology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 3
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    Drivers of winter ice formation on Arctic water bodies in the Lena Delta, Siberia (2024)
    Taylor & Francis
    In:  EPIC3Arctic Antarctic and Alpine Research, Taylor & Francis, 56(1), pp. 2350546-2350546, ISSN: 1523-0430
    Details
    Publication Date: 2024-06-14
    Description: Arctic landscapes are characterized by diverse water bodies, which are covered with ice for most of the year. Ice controls surface albedo, hydrological properties, gas exchange, and ecosystem services, but freezing processes differ between water bodies. We studied the influence of geomor-phology and meteorology on winter ice of water bodies in the Lena Delta, Siberia. Electrical conductivity (EC) and stable water isotopes of ice cores from four winters and six water bodies were measured at unprecedented resolution down to 2-cm increments, revealing differences in freezing systems. Open-system freezing shows near-constant isotopic and EC gradients in ice, whereas closed-system freezing shows decreasing isotopic composition with depth. Lena River ice displays three zones of isotopic composition within the ice, reflecting open-system freezing that records changing water sources over the winter. The isotope composition of ice covers in landscape units of different ages also reflects the individual water reservoir settings (i.e., Pleistocene vs. Holocene ground ice thaw). Ice growth models indicate that snow properties are a dominant determinant of ice growth over winter. Our findings provide novel insights into the winter hydro-chemistry of Arctic ice covers, including the influences of meteorology and water body geomor-phology on freezing rates and processes.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 4
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    Physiology of Reproduction in Porifera (2024)
    Taylor & Francis
    Details
    Publication Date: 2024-06-06
    Description: Sponges (Porifera) are one of the most ancient animals present on the planet. They are aquatic, filter-feeding sessile metazoans that rely on asexual and sexual reproduction. These animals have a long history on Earth and had plenty of time to develop different reproductive strategies. Here, we review different aspects of the physiology of reproduction in Porifera. This chapter is divided into six sections. In the first section, we present general features of sponge reproduction, such as factors that trigger the onset of their reproduction, as well as the periodicity of their reproductive cycles. The molecular basis of the hormonal control of gametogenesis is presented although sponges have no endocrine system. The second section deals with gametogenesis, 2including how sex and the germline are determined and maintained in this group, how oocytes and spermatozoa are formed and nourished, and how they behave once released. The third section reviews different topics about the reproductive mode. Here, we discuss the dichotomy in reproductive mode: oviparity vs. viviparity, the spatial distribution of the reproductive elements in the sponge tissue, the effect of symbiosis in reproduction (and vice-versa), and energetic trade-offs during reproduction. The fourth section describes fertilization, and we cover the factors controlling the spawning events and how the sperm are attracted and recognized by the egg. The diversity of developmental modes, the molecular control of sponge embryonic development, and the maternal-embryo relationship are discussed in the fifth section. Finally, in the sixth section, the types of asexual reproduction, factors influencing budding, gemmulation, hibernation, and gemmule development are described. Knowledge about the physiology of reproduction of sponges is still fragmentary and based on studies in very few species. Consequently, there are many generalizations that need further investigation. However, evidence-based on morphological, experimental, and molecular data demonstrates that their physiology is not very different from that of other metazoans
    Type: Book chapter , PeerReviewed
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  • 5
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    Against the budget view in climate ethics (2022)
    Taylor & Francis
    Details
    Publication Date: 2024-05-23
    Description: The extent of our duties to mitigate climate change is commonly conceptualized in terms of temperature goals like the 1.5°C and the 2°C target and corresponding emissions budgets. While I do acknowledge the political advantages of any framework that is relatively easy to understand, I argue that this particular framework does not capture the true extent of our mitigation duties. Instead I argue for a more differentiated approach that is based on the well-known distinction between subsistence and luxury emissions. At the heart of this approach lies the argument that we have no budget of substantial, net-positive luxury emissions left. In a world in which dangerous climate change has begun, we must expect all further substantial, net-positive luxury emissions to cause harm. Since they lack the kind of justification needed for them to be nevertheless permissible, I conclude that we must stop emitting them with immediate effect. I also briefly discuss the difficult case of subsistence emissions and offer some first thoughts on the morality of a third category of emissions, what I call ‘transition emissions’.
    Type: Article , PeerReviewed
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  • 6
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    GPR investigations at San Nicolò Church: a case-study from the 1669 eruption in the old settlement of Misterbianco (Etna, Sicily) (2024)
    Taylor & Francis
    Details
    Publication Date: 2024-05-21
    Description: Misterbianco, located on the southern slope of Mt. Etna (eastern Sicily), was destroyed in the past by two catastrophic events that raised the old town to the ground. The first was the great eruption of 1669, whose lava front buried dozens of villages encountered along its path, entirely destroying the architectural heritage of Etna's southern flank. The second event was the disastrous 1693 Val di Noto earthquake, which caused major destruction throughout south-eastern Sicily, also damaging the few still standing buildings in the town. The GPR survey performed at this site, 350 years after the eruption, allowed a first attempt of planimetric reconstruction of the San Nicolò Church. Starting from the site history, we present the results of an integrated approach that involves history, volcanology and geophysics aimed at addressing future archaeological excavations for the protection of archaeological and monumental assets in a difficult setting as this volcanic environment.
    Description: Published
    Description: 42-50
    Description: JCR Journal
    Keywords: GPR, SfM,cultural heritage,Etna, 1669 eruption ; 04.02. Exploration geophysics
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 7
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    Place-Based Scientific Inquiry (2023)
    Taylor & Francis | Routledge
    Details
    Publication Date: 2024-05-15
    Description: Learn how to facilitate scientific inquiry projects by getting out of the classroom and connecting to the natural environment—in your schoolyard, or in your community! Providing a contemporary perspective on how to do scientific inquiry in ways that can make teachers’ lives easier and students’ experiences better, this book draws on authentic inquiry, engaging with communities, and teaching through project-based learning to help students design and carry out scientific inquiry projects that are grounded in their local places. This accessible guide will help you to develop skills around facilitation, team building, and learning outdoors in schoolyards and parks, acting as a go-to toolkit for teachers to help build confidence and skills in these areas. Written according to the Next Generation Science Standards, this book supports teachers in fostering community engagement and a justice-first classroom. The approachable resources included in this book will help teachers with all levels of experience succeed in empowering students grades 3–12 in their science learning. Additional support materials including template documents for student use and for teacher planning, as well as examples of real student work, are available online. The Open Access version of this book, available at www.taylorfrancis.com, has been made available under a Creative Commons Attribution (CC-BY) 4.0 license
    Keywords: climate change ; instructional strategies ; NGSS ; outdoor education ; Science education ; teaching strategies
    Language: English
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  • 8
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    Words and visions around/about Chinese transnational mobilities 流动 (2023)
    Firenze University Press
    Details
    Publication Date: 2024-05-13
    Description: This collection gathers the contributions of ten scholars on the topic of transnational cultural and physical mobility originating in China. These contributions aim to open conversations among Chinese Studies scholars by applying a Mobility Studies perspective. Exploring diverse narratives and forms of representation from people of Chinese heritage, the book is divided into three parts that each look closely at the relationship between movement and cultural production. The first part is dedicated to four types of mobility of people from China to Italy, namely tourist mobility (Miriam Castorina), labor mobility (Valentina Pedone), student mobility (Xu Hao), and mobility of social elites (Andrea Scibetta). The second part is dedicated to examples of reverse mobility from Italy to China (Gao Changxu, Chiara Lepri, Giuseppe Rizzuto). The third part focuses on case studies based on mobilities from China to territories other than Italy (Rebecca Ehrenwirth, Martina Renata Prosperi, Giulia Rampolla).
    Keywords: China-Italy mobilities ; Chinese Transnational Migration ; Chinese Travel Writing ; Chinese International Students ; Sinophone Literature ; thema EDItEUR::D Biography, Literature and Literary studies
    Language: English
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  • 9
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    Chapter Privacy online tra bambini e adolescenti: concezione, preoccupazione e tutela (2023)
    Firenze University Press
    Details
    Publication Date: 2024-05-13
    Description: The general aim of this study is to investigate how kids and adolescents conceptualize online privacy and the concern about their online privacy through a developmental perspective, while also trying to understand its impact on a safe online surfing environment. Three studies were conducted: 1) a systematic review, which was aimed to clarify the relative strengths and weaknesses of the literature about the construct of online privacy and online privacy concerns among kids and adolescents; 2) a qualitative study, aimed to understand how adolescents define – and consequently understand – the concept of online privacy; 3) a quantitative study, which aimed at addressing whether online surfing is associated with online privacy concerns and with GDPR (General Data Protection Regulation) differently across different ages during adolescence. Finally, the results of the three studies were analysed and discussed in light of the theory background. An analysis of the literature showed how children may have difficulties to fully understand risks in unusual contexts, and that they can have difficulties in responding to situations when they struggled to recognise or understand fully the risks involved. The results of the three studies are discussed, underlining how adolescents understand their online privacy, if they are concerned about their data online, how we should help them manage better their privacy online, and how we should design services, applications and devices to help kids understand better the implication of the Internet on their ‘onlife’ (Floridi, 2015).
    Keywords: Adolescents ; Concern ; GDPR ; Kids ; Online Privacy ; thema EDItEUR::N History and Archaeology::NH History
    Language: Italian
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  • 10
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    Chapter Gli studi superiori a Firenze dal primo Novecento alla nascita dell’Università (2024)
    Firenze University Press
    Details
    Publication Date: 2024-05-13
    Description: The article describes the history of higher education in Florence from the beginning of the twentieth century until the mid-1920s, when the ancient Institute of Higher Studies, founded in 1859, was transformed into a modern University. The development of the university institution is reconstructed through the detailed analysis of the annual reports presented by the superintendents of the Institute and making use of the unpublished documents preserved in the historical archives of the University. Particular attention is paid to the evolution of the number of enrolled students and graduates, as well as to the expansion of the training offer made possible by the opening of new faculties and new laboratories. Finally, the article focuses on some important professors, such as the physicist Antonio Garbasso who was also mayor of Florence, and the historian Gaetano Salvemini who was one of the leaders of the anti-fascist movement and, due to his political positions, in 1925 he was forced to leave the University to emigrate to the United States.
    Keywords: Florence ; World War I ; history of the University ; Fascism ; Anti-fascism ; higher education ; thema EDItEUR::J Society and Social Sciences::JN Education
    Language: Italian
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