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Understanding how evolution affects the spatial dynamics of interacting species

Abstract : Selective pressures on organisms are constantly changing due to multiple factors, such as climate change and the introduction of exotic species. Empirical evidence shows that interspecific interactions and evolution can have important effects on species distributions, independently or simultaneously. We are thus in need of models capable of describing the effects of both these factors, in order to better understand the drivers of species geographical distributions in a changing world. In this thesis we explored the effects of adaptation to environmental gradients under two different interaction scenarios: in a monospecific context and for a two-species predator-prey community. In a third time, we studied the effects of adaptation to pathogens in an invasion scenario, where three species interact: a native population and an exotic competitor co-introduced with a pathogen. The studied models reveal the effects of adaptation and interaction through eco-evolutionary propagation speeds that are closely linked to the species' adaptation potentials. We discuss implications of these results for description and interpretation of currently utilized Species Distribution Models.
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Submitted on : Thursday, October 15, 2020 - 3:14:09 PM
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José Méndez-Vera. Understanding how evolution affects the spatial dynamics of interacting species. Earth Sciences. Sorbonne Université, 2019. English. ⟨NNT : 2019SORUS262⟩. ⟨tel-02968234⟩



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