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  • 1
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Chironomus thummi-Larven wurden für längere Zeit bei konstantem, herabgesetztem Sauerstoffgehalt aufbewahrt. Es wird ihr Verhalten beschrieben und auf die ungenügende Anpassung an einen Daueraufenthalt in stark sauerstoffarmem Wasser hingewiesen. Die Dehydrasen- und Katalaseaktivität der Gewebe werden nicht durch die Vorbehandlung bei verschiedenem Sauerstoffpartialdruck beeinflußt. Während des Hungerns nimmt die Dehydrasenaktivität ab. Die für den Sauerstoffverbrauch bekannte „Anpassung an die Not“ (Pflüger) erstreckt sich also auch auf das Fermentsystem. Unter sauerstoffarmen Bedingungen nimmt bei Hungertieren der Cocarboxylasegehalt im Gegensatz zu sauerstoffreicher Vorbehandlung nicht ab. Diese Retention wird als Sparmaßnahme in Zeiten gedeutet, wo keine Nahrung aufgenommen wird (vergleichbar der Winterruhe der Kartoffelkäfer). Sie findet trotz gesteigerten Glykogenverbrauchs statt.
    Type of Medium: Electronic Resource
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  • 2
  • 3
    Publication Date: 2022-03-21
    Description: Significant effort has gone into identifying and assessing climate change impacts, often within tightly defined sectoral contexts or within specific administrative boundaries, for example in national adaptation plans. Interest is now growing among policy makers and researchers to better understand the transmission of climate impacts from one location to another. While impacts, adaptation and vulnerability research traditionally failed to take such climate impacts into account, a number of recent national-level scoping studies have recognized the potential significance of cross-border climate impacts. However, these studies have lacked an explicit futures perspective, and implicitly assumed static conditions under which cross-border climate impact is assessed. This paper addresses this research gap by developing a scenario-based framework for the study of future cross-border climate impacts using the global Shared Socioeconomic Pathways (SSPs). We apply this framework to assess future cross-border climate impacts in Kenya. We develop ‘extended SSPs’ in a combined top-down and bottom-up approach implemented through a co-production process together with local stakeholders. The bottom-up element of our approach consists of local drivers for understanding Kenya’s vulnerability to future cross-border climate impacts, and the top-down element consists of the global SSPs as common boundary conditions. Finally, the extended SSPs combined with identified future cross-border climate impacts are used to stimulate a participatory co-production process to explore and evaluate different sets of adaptation options and activities. These future-oriented adaptation actions have the potential to improve Kenyan adaptation planning to mitigate and adapt to future climate impacts generated from global flows.
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 4
    Publication Date: 2022-03-21
    Description: Climate change impacts, adaptation and vulnerability studies tend to confine their attention to impacts and responses within the same geographical region. However, this approach ignores cross-border climate change impacts that occur remotely from the location of their initial impact and that may severely disrupt societies and livelihoods. We propose a conceptual framework and accompanying nomenclature for describing and analysing such cross-border impacts. The conceptual framework distinguishes an initial impact that is caused by a climate trigger within a specific region. Downstream consequences of that impact propagate through an impact transmission system while adaptation responses to deal with the impact propagate through a response transmission system. A key to understanding cross-border impacts and responses is a recognition of different types of climate triggers, categories of cross-border impacts, the scales and dynamics of impact transmission, the targets and dynamics of responses and the socio-economic and environmental context that also encompasses factors and processes unrelated to climate change. These insights can then provide a basis for identifying relevant causal relationships. We apply the framework to the floods that affected industrial production in Thailand in 2011, and to projected Arctic sea ice decline, and demonstrate that the framework can usefully capture the complex system dynamics of cross-border climate impacts. It also provides a useful mechanism to identify and understand adaptation strategies and their potential consequences in the wider context of resilience planning. The cross-border dimensions of climate impacts could become increasingly important as climate changes intensify. We conclude that our framework will allow for these to be properly accounted for, help to identify new areas of empirical and model-based research and thereby support climate risk management.
    Type: info:eu-repo/semantics/article
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  • 5
    Publication Date: 2023-01-21
    Description: Countries’ reliance on global food trade networks implies that regionally different climate change impacts on crop yields will be transmitted across borders. This redistribution constitutes a significant challenge for climate adaptation planning and may affect how countries engage in cooperative action. This paper investigates the long-term (2070–2099) potential impacts of climate change on global food trade networks of three key crops: wheat, rice and maize. We propose a simple network model to project how climate change impacts on crop yields may be translated into changes in trade. Combining trade and climate impact data, our analysis proceeds in three steps. First, we use network community detection to analyse how the concentration of global production in present-day trade communities may become disrupted with climate change impacts. Second, we study how countries may change their network position following climate change impacts. Third, we study the total climate-induced change in production plus import within trade communities. Results indicate that the stability of food trade network structures compared to today differs between crops, and that countries’ maize trade is least stable under climate change impacts. Results also project that threats to global food security may depend on production change in a few major global producers, and whether trade communities can balance production and import loss in some vulnerable countries. Overall, our model contributes a baseline analysis of cross-border climate impacts on food trade networks.
    Language: English
    Type: info:eu-repo/semantics/article
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  • 6
    Publication Date: 2023-10-18
    Description: The goal of limiting global warming to well below 2°C as set out in the Paris Agreement calls for a strategic assessment of societal pathways and policy strategies. Besides policy makers, new powerful actors from the private sector, including finance, have stepped up to engage in forward-looking assessments of a Paris-compliant and climate-resilient future. Climate change scenarios have addressed this demand by providing scientific insights on the possible pathways ahead to limit warming in line with the Paris climate goal. Despite the increased interest, the potential of climate change scenarios has not been fully unleashed, mostly due to a lack of an intermediary service that provides guidance and access to climate change scenarios. This perspective presents the concept of a climate change scenario service, its components, and a prototypical implementation to overcome this shortcoming aiming to make scenarios accessible to a broader audience of societal actors and decision makers.
    Type: info:eu-repo/semantics/article
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