Ancient divergence and recent population expansion in a leaf frog endemic to the southern Brazilian Atlantic forest

Autor(es)

Brunes, Tuliana O. ^{[1, 2]} ; Thome, Maria Tereza C. ^[3] ; Alexandrino, Joao ^[4] ; Haddad, Celio F. B. ^[3] ; Sequeira, Fernando ^[2]

Afiliação do(s) autor(es)

^[1] Univ Porto, Dept Biol, Fac Ciencias, P-4169007 Oporto - Portugal

^[2] Univ Porto, Lab Associado, Ctr Invest Biodiversidade & Recursos Genet, CIBIO InBIO, P-4485661 Vairao - Portugal

^[3] Univ Estadual Paulista, UNESP, Inst Biociencias, Dept Zool, BR-13506900 Rio Claro, SP - Brazil

^[4] Univ Fed Sao Paulo, UNIFESP, Dept Ciencias Biol, BR-09972270 Diadema - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ORGANISMS DIVERSITY & EVOLUTION; v. 15, n. 4, p. 695-710, DEC 2015.
• Citações Web of Science: 7

Resumo

The evolutionary history of Neotropical organisms has been often interpreted through broad-scale generalizations. The most accepted model of diversification for the Brazilian Atlantic forest (BAF) rely on putative historical stability of northern areas and massive past habitat replacement of its southern range. Here, we use the leaf frog Phyllomedusa distincta, endemic to the southern BAF, to better understand diversification patterns within this underexplored rainforest region. We used an integrative approach coupling fine-scale sampling and multilocus sequence data, with traditional and statistical phylogeographic (multilocus approximate Bayesian computation) methods to explore alternative hypotheses of diversification. We also employed species paleodistribution modeling to independently verify habitat stability upon a spatially explicit model. Our data support two divergent lineages with coherent geographic distribution that span throughout northern and southern ranges. Demographic estimates suggested the Southern lineage has experienced a recent population expansion, whereas the Northern lineage remained more stable. Hypothesis testing supports a scenario of ancient vicariance with recent population expansion. The paleodistribution model revealed habitat discontinuity during the Last Glacial Maximum (LGM) with one area of putative stability within the range of the Northern lineage. Evidence on genetic structure, demography, and paleodistribution of P. distincta support a historically heterogeneous landscape for the southern BAF, with both areas of forest stability and regions where forest occupation is probably recent. We also associate the southern end of the Cubato shear zone with a phylogeographic break in the BAF. Taken together, our results argue for the idea of multiple mechanisms generating diversity in this biome and underscore the need of fine-scale data in revealing more detailed pictures. (AU)

• Processo FAPESP: 11/51392-0 - A história da Caatinga: filogeografia comparada de anfíbios enfrentando um bioma xérico
• Beneficiário: Maria Tereza Chiarioni Thomé
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 08/50928-1 - Especiação de anfíbios anuros em ambientes de altitude
• Beneficiário: Célio Fernando Baptista Haddad
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/50741-7 - Diversidade e conservação dos anfíbios brasileiros
• Beneficiário: Célio Fernando Baptista Haddad
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 05/52727-5 - Biogeografia, filogeografia e diversificação de anuros endêmicos da Mata Atlântica do Brasil
• Beneficiário: João Miguel de Barros Alexandrino
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 06/56938-3 - Biogeografia, filogeografia e diversificação de anuros endêmicos da Mata Atlântica do Brasil
• Beneficiário: João Miguel de Barros Alexandrino
• Modalidade de apoio: Bolsas no Brasil - Jovens Pesquisadores