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Etude non invasive de la dynamique et de la génétique des populations chez une chauve-souris forestière : impact de la qualité de l'habitat et de la connectivité

Abstract : Efficient conservation management against habitat degradation and fragmentation of a species requires understanding how the environment impacts its population dynamics and the species’ sensitivity to connectivity loss. Acquiring sufficient knowledge about these processes is challenging for any species, and is even more complicated for species too sensitive to be studied with classical methods. During this work, we studied the population dynamics and genetics of a woodland specialized bat who has undergone a serious decline in the north of Europe, the lesser horseshoe bat (Rhinolophus hipposideros), with non-invasive methods (counts, non-invasive genetics).Our results shown that climate and landscape around maternity colonies explain population size variations and dynamics of the lesser horseshoe bat. We also confirmed a direct impact of landscape on juvenile survival. We finally observed that genetic diversity could be strongly decreased by population history and a lack of connectivity between populations. Our results have direct implications for the lesser horseshoe bat conservation but also for the development of analyses integrating non-invasive genetic data in conservation biology.
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https://tel.archives-ouvertes.fr/tel-01944103
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Submitted on : Tuesday, December 4, 2018 - 2:11:06 PM
Last modification on : Friday, September 4, 2020 - 9:00:29 PM

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  • HAL Id : tel-01944103, version 1

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Pierre-Loup Jan. Etude non invasive de la dynamique et de la génétique des populations chez une chauve-souris forestière : impact de la qualité de l'habitat et de la connectivité. Ecologie, Environnement. Agrocampus Ouest, 2017. Français. ⟨NNT : 2017NSARH103⟩. ⟨tel-01944103⟩

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