Article Dans Une Revue Communications Biology Année : 2021

Past environmental changes affected lemur population dynamics prior to human impact in Madagascar

Helena Teixeira
Jordi Salmona
  • Fonction : Auteur
Julia Metzger
Thomas Kasper
  • Fonction : Auteur
Gerhard Daut
Sylvie Rouland
  • Fonction : Auteur
Romule Rakotondravony
  • Fonction : Auteur
Lounès Chikhi
Hermann Behling
  • Fonction : Auteur

Résumé

Abstract Quaternary climatic changes have been invoked as important drivers of species diversification worldwide. However, the impact of such changes on vegetation and animal population dynamics in tropical regions remains debated. To overcome this uncertainty, we integrated high-resolution paleoenvironmental reconstructions from a sedimentary record covering the past 25,000 years with demographic inferences of a forest-dwelling primate species ( Microcebus arnholdi ), in northern Madagascar. Result comparisons suggest that climate changes through the African Humid Period (15.2 – 5.5 kyr) strongly affected the demographic dynamics of M. arnholdi . We further inferred a population decline in the last millennium which was likely shaped by the combination of climatic and anthropogenic impacts. Our findings demonstrate that population fluctuations in Malagasy wildlife were substantial prior to a significant human impact. This provides a critical knowledge of climatically driven, environmental and ecological changes in the past, which is essential to better understand the dynamics and resilience of current biodiversity.

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hal-03445407 , version 1 (29-11-2021)

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Helena Teixeira, Vincent Montade, Jordi Salmona, Julia Metzger, Laurent Bremond, et al.. Past environmental changes affected lemur population dynamics prior to human impact in Madagascar. Communications Biology, 2021, 4 (1), ⟨10.1038/s42003-021-02620-1⟩. ⟨hal-03445407⟩
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