Population genomic structure in Goodman's mouse lemur reveals long-standing separation of Madagascar's Central Highlands and eastern rainforests

Autor: George P. Tiley, Tobias van Elst, Helena Teixeira, Dominik Schüßler, Jordi Salmona, Marina B. Blanco, José M. Ralison, Blanchard Randrianambinina, Rodin M. Rasoloarison, Amanda R. Stahlke, Paul A. Hohenlohe, Lounès Chikhi, Edward E. Louis, Ute Radespiel, Anne D. Yoder
Přispěvatelé: Duke University [Durham], University of Veterinary Medicine [Hannover], University of Hildesheim, Evolution et Diversité Biologique (EDB), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Université d'Antananarivo, Université de Mahajanga, Deutsches Primatenzentrum, Leibniz-Institut Primatenforschung (DPZ), Institute for Bioinformatics and Evolutionary Studies [Moscow] (IBEST), University of Idaho [Moscow, USA], Instituto Gulbenkian de Ciência [Oeiras] (IGC), Fundação Calouste Gulbenkian, Grewcock Center for Conservation and Research, North-German Supercomputing Alliance (HLRN) to UR and TvE, German Research Foundation (DFG Ra 502/23–1 to UR), Fundação para a Ciência e Tecnologia (ref. PTDC-BIA-EVL/30815/2017), ANR-10-LABX-0041,TULIP,Towards a Unified theory of biotic Interactions: the roLe of environmental(2010), ANR-11-IDEX-0002,UNITI,Université Fédérale de Toulouse(2011), ANR-10-LABX-0025,CEBA,CEnter of the study of Biodiversity in Amazonia(2010)
Rok vydání: 2021
Předmět:
Zdroj: Molecular Ecology
Molecular Ecology, 2022, 31, pp.4901-4918. ⟨10.1111/mec.16632⟩
ISSN: 0962-1083
1365-294X
DOI: 10.22541/au.163958777.74253126/v1
Popis: Duke Lemur Centre publication #1510; International audience; Madagascar's Central Highlands are largely composed of grasslands, interspersed with patches of forest. The historical perspective was that Madagascar's grasslands had anthropogenic origins, but emerging evidence suggests that grasslands were a component of the pre-human Central Highlands vegetation. Consequently, there is now vigorous debate regarding the extent to which these grasslands have expanded due to anthropogenic pressures. Here, we shed light on the temporal dynamics of Madagascar's vegetative composition by conducting a population genomic investigation of Goodman's mouse lemur (Microcebus lehilahytsara; Cheirogaleidae). These small-bodied primates occur both in Madagascar's eastern rainforests and in the Central Highlands, making them a valuable indicator species. Population divergences among forest-dwelling mammals will reflect changes to their habitat, including fragmentation, whereas patterns of post-divergence gene flow can reveal formerly wooded migration corridors. To explore these patterns, we used RADseq data to infer population genetic structure, demographic models of post-divergence gene flow, and population size change through time. The results offer evidence that open habitats are an ancient component of the Central Highlands, and that widespread forest fragmentation occurred naturally during a period of decreased precipitation near the last glacial maximum. Models of gene flow suggest that migration across the Central Highlands has been possible from the Pleistocene through the recent Holocene via riparian corridors. Though our findings support the hypothesis that Central Highland grasslands predate human arrival, we also find evidence for human-mediated population declines. This highlights the extent to which species imminently threatened by human-mediated deforestation may already be vulnerable from paleoclimatic conditions.
Databáze: OpenAIRE
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