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Dynamiques des interactions espèces - espace : mise en relation des pratiques de déplacement des populations d'herbivores et de l'évolution de l'occupation du sol dans le parc de Hwange (Zimbabwe).

Abstract : National parks aim at protecting natural resources, including fauna and flora. However, some of these resources are depleting, particularly due to animal populations that converge regularly in certain places. In that context, the objective of this thesis is to propose an approach to identify interactions between movement practices of herbivore populations and land cover. We apply this approach to elephants, zebras and buffaloes of the Hwange National Park (Zimbabwe). The proposed approach combines notions from ecology, geography and geomatics. First, we identify places where spatial practices of populations are recurrent. These places are called places of convergence composed of high-density paths and stops. Diverse data sources are analyzed: animal counts and GPS tracks. The last is used to construct trajectories of animals based on concepts from Time Geography. This construction enables us to estimate the potential pressure applied by animals on land cover. Second, places where land cover has changed are extracted from remote sensing data. Last, we study the links between places of converge of populations and places of land cover changes. The results point out that data sources are complementary. They underline different types of links between animal populations and land cover, according to the species considered, the time periods and the studied areas.
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Submitted on : Tuesday, June 3, 2014 - 3:17:49 PM
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2013-03_-_BUARD_-_Dyn.pdf
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  • HAL Id : tel-00806834, version 2

Citation

Élodie Buard. Dynamiques des interactions espèces - espace : mise en relation des pratiques de déplacement des populations d'herbivores et de l'évolution de l'occupation du sol dans le parc de Hwange (Zimbabwe).. Géographie. Université Panthéon-Sorbonne - Paris I, 2013. Français. ⟨NNT : 2013PA010606⟩. ⟨tel-00806834v2⟩

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