The role of vicariance and dispersal on the temporal range dynamics of forest vipers in the Neotropical region

Autor(es)

Pontes-Nogueira, Matheus ^{[1, 2]} ; Martins, Marcio ^[3] ; Alencar, V, Laura R. ; Sawaya, Ricardo J. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Grad Ciencias Biol, Diadema - Brazil

^[2] Univ Fed ABC, Programa Posgrad Evolucao & Diversidade, Sao Bernardo Do Campo - Brazil

^[3] Univ Sao Paulo, Inst Biociencias, Dept Ecol, Sao Paulo - Brazil

^[4] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Sao Bernardo Do Campo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PLoS One; v. 16, n. 9 SEP 17 2021.
• Citações Web of Science: 0

Resumo

The emergence of the diagonal of open/dry vegetations, including Chaco, Cerrado and Caatinga, is suggested to have acted as a dispersal barrier for terrestrial organisms by fragmenting a single large forest that existed in South America into the present Atlantic and Amazon forests. Here we tested the hypothesis that the expansion of the South American diagonal of open/dry landscapes acted as a vicariant process for forest lanceheads of the genus Bothrops, by analyzing the temporal range dynamics of those snakes. We estimated ancestral geographic ranges of the focal lancehead clade and its sister clade using a Bayesian dated phylogeny and the BioGeoBEARS package. We compared nine Maximum Likelihood models to infer ancestral range probabilities and their related biogeographic processes. The best fitting models (DECTS and DIVALIKETS) recovered the ancestor of our focal clade in the Amazon biogeographic region of northwestern South America. Vicariant processes in two different subclades resulted in disjunct geographic distributions in the Amazon and the Atlantic Forest. Dispersal processes must have occurred mostly within the Amazon and the Atlantic Forest and not between them. Our results suggest the fragmentation of a single ancient large forest into the Atlantic and Amazon forests acting as a driver of vicariant processes for the snake lineage studied, highlighting the importance of the diagonal of open/dry landscapes in shaping distribution patterns of terrestrial biota in South America. (AU)

• Processo FAPESP: 17/11796-1 - Evolução dos padrões de distribuição de jararacas florestais
• Beneficiário: Matheus Pontes Nogueira
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 18/14091-1 - Efeitos de alterações de habitat sobre comunidades de anfíbios e répteis Squamata: subsídios para programas de manejo, avaliações de risco de extinção e planos de ação de conservação
• Beneficiário: Marcio Roberto Costa Martins
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/23677-9 - Novas abordagens de ecologia e conservação: diversidade filogenética e funcional de anfíbios e serpentes da Mata Atlântica brasileira
• Beneficiário: Ricardo Jannini Sawaya
• Modalidade de apoio: Auxílio à Pesquisa - Regular