Climatic dynamics and topography control genetic variation in Atlantic Forest montane birds

Autor(es)

Thom, Gregory ^{[1, 2]} ; Smith, Brian Tilston ^[1] ; Gehara, Marcelo ^{[3, 4]} ; Montesanti, Julia ^[5] ; Lima-Ribeiro, Matheus S. ^[6] ; Piacentini, Vitor Q. ^[7] ; Miyaki, Cristina Y. ^[2] ; do Amaral, Fabio Raposo ^[5]

Afiliação do(s) autor(es)

^[1] Amer Museum Nat Hist, Dept Ornithol, New York, NY 10024 - USA

^[2] Univ Sao Paulo, Dept Genet & Biol Evolut, Rua Matao, 277, Cidade Univ, BR-05508090 Sao Paulo, SP - Brazil

^[3] Amer Museum Nat Hist, Sackler Inst Comparat Genom, New York, NY 10024 - USA

^[4] Rutgers State Univ, Dept Biol Sci, 195 Univ Ave, Newark, NJ 07102 - USA

^[5] Univ Fed Sao Paulo, Dept Ecol & Biol Evolut, Rua Prof Artur Riedel 275, BR-09972270 Diadema, SP - Brazil

^[6] Univ Fed Goias, Lab Macroecol, Jatai, Go - Brazil

^[7] Univ Fed Mato Grosso, Inst Biociencias, Dept Biol & Zool, Cuiaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Molecular Phylogenetics and Evolution; v. 148, JUL 2020.
• Citações Web of Science: 0

Resumo

Montane organisms responded to Quaternary climate change by tracking suitable habitat along elevational gradients. However, it is unclear whether these past climatic dynamics generated predictable patterns of genetic diversity in co-occurring montane taxa. To test if the genetic variation is associated with historical changes in the elevational distribution of montane habitats, we integrated paleoclimatic data and a model selection approach for testing the demographic history of five co-distributed bird species occurring in the southern Atlantic Forest sky islands. We found that changes in historical population sizes and current genetic diversity are attributable to habitat dynamics among time periods and the current elevational distribution of populations. Taxa with populations restricted to the more climatically dynamic southern mountain block (SMB) had, on average, a six-fold demographic expansion, whereas the populations from the northern mountain block (NMB) remained constant. In the current configuration of the southern Atlantic Forest montane habitats, populations in the SMB have more widespread elevational distributions, occur at lower elevations, and harbor higher levels of genetic diversity than NMB populations. Despite the apparent coupling of demographic and climatic oscillations, our data rejected simultaneous population structuring due to historical habitat fragmentation. Demographic modeling indicated that the species had different modes of differentiation, and varied in the timing of divergence and the degree of gene flow across mountain blocks. Our results suggest that the heterogeneous distribution of genetic variation in birds of the Atlantic Forest sky islands is associated with the interplay between topography and climate of distinct mountains, leading to predictable patterns of genetic diversity. (AU)

• Processo FAPESP: 11/50143-7 - Filogeografia multilocus comparada de três espécies de Poospiza (Aves, Passeriformes): explorando a história da Mata Atlântica montana
• Beneficiário: Fábio Sarubbi Raposo do Amaral
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Jovens Pesquisadores
• Processo FAPESP: 13/50297-0 - Dimensions US-BIOTA São Paulo: integrando disciplinas para a predição da biodiversidade da Floresta Atlântica no Brasil
• Beneficiário: Cristina Yumi Miyaki
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 11/23155-4 - Filogeografia multilocus comparada de três espécies de Poospiza (Aves, Passeriformes): explorando a história da Mata Atlântica montana
• Beneficiário: Fábio Sarubbi Raposo do Amaral
• Modalidade de apoio: Bolsas no Brasil - Programa BIOTA - Jovens Pesquisadores
• Processo FAPESP: 17/25720-7 - Filogenômica comparada de espécies de aves montanas do sul da Floresta Atlântica: Integrando aspectos evolutivos e ecológicos no estudo da formação de comunidades
• Beneficiário: Gregory Thom e Silva
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/17869-3 - Filogenômica comparada de espécies de aves montanas do sul da Floresta Atlântica: Integrando aspectos evolutivos e ecológicos no estudo da formação de comunidades
• Beneficiário: Gregory Thom e Silva
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 18/03428-5 - Dimensions US-BIOTA-Sao Paulo: características preditoras da diversificação adaptativa na Diagonal Seca Brasileira
• Beneficiário: Vera Nisaka Solferini
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático