Biogeographic scenarios for the diversification of a widespread Neotropical species, Glossophaga soricina (Chiroptera: Phyllostomidae). Issue 5 (3rd September 2017) - Dias, Cayo A. Rocha
Abstract : In order to contribute to the understanding of the effect of geological and climatic changes on species diversification in the Neotropics, we employed molecular techniques to study the population dynamics of the glossophagine bat Glossophaga soricina, a widespread species in the Neotropical region. We aimed to assess the dispersal and distribution of mtDNA lineages of G. soricina and evaluate the possible effect of vicariant events in the population history and dynamics. Glossophaga soricina presented two main highly supported mtDNA lineages, which diverged between ∼2.4 and 5 million years ago, probably following a vicariant event caused by the Andes final uplift. The lower sea level during Pleistocene glaciations also made possible the occupation of Jamaica after an event of dispersion over the Caribbean Sea, although past climatic fluctuations had little effect over population dynamics of G. soricina . Our results corroborate the idea that the Andes uplift played an important role in the evolution of Neotropical biodiversity. In this context we suggest that geographic events causing large scale environmental disjunction, such as the uplift of mountains, are more likely to restrict gene flow amongst populations of tolerant species with broad geographic range than local climate driven environmental changes.