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Historical dynamics and current environmental effects explain the spatial distribution of species richness patterns of New World monkeys [PeerJ]

Keywords : biodiversity, biogeography

par Frédéric Magné - publié le

Why biodiversity is not uniformly distributed on the Earth is a major research question of biogeography. One of the most striking patterns of disparity in species distribution are the biodiversity hotspots, which generally do not fit with the distribution of relevant components of the Neotropical biota. In this study, we assess the proximal causes of the species-richness pattern of one of the most conspicuous groups of Neotropical mammals, the New World monkeys the Platyrrhini. We test two complementary hypotheses : (1) there is a historical source-sink dynamic (addressed using macroevolutionary and macroecological approaches) ; (2) the large number of species in the Amazon basin is due to the constraints imposed by environmental variables occurring outside this area.(...)

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