Título:	Ecological traits drive genetic structuring in two open-habitat birds from the morphologically cryptic genus Elaenia (Aves: Tyrannidae)
Autor(es):	Freitas, Eliane L. de Campagna, Leonardo Butcher, Bronwyn Lovette, Irby Caparroz, Renato
Assunto:	Aves - Ecologia Genética
Data de publicação:	2-Fev-2022
Editora:	John Wiley & Sons Ltd on behalf of Nordic Society Oikos
Referência:	FREITAS, Eliane L. de et al. Ecological traits drive genetic structuring in two open-habitat birds from the morphologically cryptic genus Elaenia (Aves: Tyrannidae). Journal of Avian Biology, e02931, 2022. DOI: https://doi.org/10.1111/jav.02931. Disponível em: https://onlinelibrary.wiley.com/doi/10.1111/jav.02931. Acesso em: 12 maio 2022.
Abstract:	Understanding the relative contributions of the many factors that shape population genetic structuring is a central theme in evolutionary and conservation biology. Historically, abiotic or extrinsic factors (such as geographic barriers or climatic shifts) have received greater attention than biotic or intrinsic factors (such as dispersal or migration). This focus stems in part from the logistical difficulties in taking a comparative phylogeographic approach that contrasts species that have experienced similar abiotic conditions during their evolution yet differ in the intrinsic attributes that might shape their genetic structure. To explore the effects of intratropical migration on the genetic structuring of Neotropical birds, we chose two congeneric species, the lesser elaenia Elaenia chiriquensis and the plain-crested elaenia E. cristata, that are largely sympatric, and which have similar plumage, habitat preferences and breeding phenology. Despite these many commonalities, they differ in migratory behavior: E. chiriquensis is an intratropical migratory species while E. cristata is sedentary. We used a reduced representation genomic approach to test whether migratory behavior is associated with increased gene flow and therefore lower genetic population structure. As predicted, we found notably stronger genetic structuring in the sedentary species than in the migratory one. E. cristata comprises genetic clusters with geographic correspondence throughout its distribution, while there are no geographic groups within Brazil for E. chiriquensis. This comparison adds to the growing evidence about how intrinsic traits like migration can shape the genetic structuring of birds, and advances our understanding of the diversification patterns of the understudied, open habitat species from South America.
Licença:	This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
DOI:	https://doi.org/10.1111/jav.02931
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