Habitat stability shaped the demographic history of the Atlantic Forest endemic rodent Euryoryzomys russatus (Cricetidae: Sigmodontinae) during the Pleistocene

Autor(es)

Abreu, Edson Fiedler ; Dalapicolla, Jeronymo ; Furini, Paulo Roberto ; De La Sancha, Noe U. ; Jansa, Sharon A. ; Percequillo, Alexandre Reis

• Tipo de documento: Artigo Científico
• Fonte: Biological Journal of the Linnean Society; v. N/A, p. 16-pg., 2022-06-08.

Resumo

The oryzomyine rodent Euryzoryzomys russatus is endemic to the Atlantic Forest of South America, where it inhabits mostly pristine humid forests. Previous phylogeographical studies performed with limited sample sizes indicated that rivers and climatic oscillations might have driven the diversification of this species. Here, we used a more comprehensive database to revisit the phylogeography and demographic history of E. russatus. Our phylogenetic inferences and haplotype network recovered four groups within E. russatus, each of which diversified between 0.33 and 0.60 Mya. These groups are mostly allopatric and are structured latitudinally along the Atlantic Forest. We did not detect any genetic break related to the major river drainages. Species distribution models recovered similar suitable areas for E. russatus in the present and past times, suggesting stability in the geographical range during the Pleistocene. The most pronounced change was the expansion of suitable areas onto the emerged continental shelf during the Last Glacial Maximum. Demographic analyses showed evidence of population expansion during periods of lowered seal levels, especially for the haplogroup associated with the Serra do Mar forest refuge. Therefore, our results failed to support the hypothesis of riverine barriers and suggest that the diversification of E. russatus is explained better by forest refugial processes. (AU)

• Processo FAPESP: 16/24464-4 - Filogeografia de duas espécies simpátricas de ratos-de-espinho da Amazônia Ocidental
• Beneficiário: Jeronymo Dalapicolla
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 15/02853-6 - Taxonomia integrativa do gênero Proechimys (Rodentia: Echimydae) da Amazônia Ocidental
• Beneficiário: Jeronymo Dalapicolla
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/15928-6 - Pequenos mamíferos não voadores da Estação Ecológica de Bananal: análises moleculares
• Beneficiário: Edson Fiedler de Abreu Júnior
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Mestrado
• Processo FAPESP: 09/16009-1 - Sistemática, evolução e diversificação da subfamília Sigmodontinae na América do Sul: a tribo Oryzomyini
• Beneficiário: Alexandre Reis Percequillo
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores