Ecological and evolutionary drivers of geographic variation in songs of a Neotropical suboscine bird: The Drab-breasted Bamboo Tyrant (Hemitriccus diops, Rhynchocyclidae)

Autor(es)

Acero-Murcia, Adriana Carolina ^{[1, 2]} ; do Amaral, Fabio Raposo ^[1] ; de Barros, Fabio C. ^[1] ; Ribeiro, Tiago da Silva ^[3] ; Miyaki, Cristina Y. ^[3] ; Maldonado-Coelho, Marcos ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Lab Genet Evolut, Diadema, SP - Brazil

^[2] Univ Fed Mato Grosso do Sul, Inst Biociencias, Lab Sintese Biodiversidade, Campo Grande, MS - Brazil

^[3] Univ Sao Paulo, Inst Biociencias, Dept Genet & Biol Evolut, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: AUK; v. 138, n. 2 APR 6 2021.
• Citações Web of Science: 0

Resumo

Understanding the evolutionary and ecological mechanisms that shape the spatial divergence of signals involved in reproductive isolation is a central goal in studies of speciation. For birds with innate songs, such as the suboscine passerine birds, the integration and comparison of both genetic and ecological factors in explaining song variation at the microevolutionary scale are rare. Here, we evaluated the evolutionary and ecological processes underlying the variation in the songs of the Atlantic Forest endemic Drab-breasted Bamboo Tyrant (Hemitriccus diops), testing the effects of both stochastic and adaptive processes, namely the stochastic and acoustic adaptation hypotheses, respectively. We combined vocal, genetic, and ecological (climate and forest cover) data across the species' range. To this end, we analyzed 89 samples of long and short songs. We performed analyses on raw and synthetic data song variables with linear mixed models and multivariate statistics. Our results show that both song types differ in spectral features between the 2 extant phylogeographic lineages of this species, but such vocal divergence is weak and subtle in both song types. Overall, there is a positive relationship of acoustic distances with the amount of forest cover in long songs. Our results suggest that there is cryptic geographical variation in both song types and that this variation is associated with low levels of genetic divergence in both songs and with ecological factors in long songs. (AU)

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• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
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• Processo FAPESP: 11/23155-4 - Filogeografia multilocus comparada de três espécies de Poospiza (Aves, Passeriformes): explorando a história da Mata Atlântica montana
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• Modalidade de apoio: Bolsas no Brasil - Programa BIOTA - Jovens Pesquisadores
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• Modalidade de apoio: Bolsas no Brasil - Jovens Pesquisadores