Ressources Etiqueté: Land Degradation
10 correspondances trouvées (Affichage 1 - 10)
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Ressource principale14/11/2012 L’UNCCD estime que plus de 250 millions de personnes sont touchées par la dégradation des terres et qu’environ 1 milliard de personnes dans plus de 100 pays sont à risque. Selon l’OMM, 33% de la superficie terrestre de la planète est vulnérable à la dégradation des terres. Elle estime notamment...
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Abstract, Wiley Online, 2020 Land degradation (LD) in Mali is prevalent and leads to an enduring environmental and humanitarian crisis. Farmers' ecological knowledge has proven to be a valuable tool in addressing its challenges. How farmers perceive LD affects how they deal with induced risks,...
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Soils are the main terrestrial reservoir of organic carbon, nitrogen and phosphorus. Thus, any type of disturbance, e.g. landuse changes, that alters soil integrity is a threat to planetaryscale biogeochemical cycles that sustain the life-support systems of the Earth. Soil erosion impacts the...
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20/01/2019 Despite almost a century of research and extension efforts, soil erosion by water, wind and tillage continues to be the greatest threat to soil health and soil ecosystem services in many regions of the world. Our understanding of the physical processes of erosion and the controls on those...
- While knowledge of how soil erosion occurs and how to control it is firmly established, more research is needed on how to measure soil loss rates and budget for measures to reduce them - remain under debate. Indeed, there is disagreement over whether erosion turns soil into a source or sink for...
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Abstract, Scientific Reports, 2018 The debate over whether soil erosion is a carbon (C) sink or atmospheric CO2source remains highly controversial. For the first time, we report the magnitude of C stabilization associated with soil erosion control for an entire large river basin. The soil erosion...
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Abstract, Land Degradation and Development 2018 Soils are vital for supporting food security and other ecosystem services. Climate change can affect soil functions both directly and indirectly. Direct effects include temperature, precipitation, and moisture regime changes. Indirect effects...
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Abstract, Environmental Research Letters, 2018 Implementation of socially acceptable and environmentally desirable solutions to soil erosion challenges is often limited by (1) fundamental gaps between the evidence bases of different disciplines and (2) an implementation gap between science-based...
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Abstract, Science Advances, 2018 Understanding of the processes governing soil organic carbon turnover is confounded by the fact that C feedbacks driven by soil erosion have not yet been fully explored at large scale. However, in a changing climate, variation in rainfall erosivity (and hence soil...
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Abstract, European Jounal of Soil Science, 2018 Land degradation in the form of soil erosion is a major problem in semiarid and arid regions. Understanding the processes and mechanisms affecting the generation of runoff and subsequent soil erosion in these regions is essential for the development...