Range-wide genetic structure in the thorn-tailed rayadito suggests limited gene flow towards peripheral populations
Author
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Botero Delgadillo, Esteban
Author
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Quirici, Verónica
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Poblete, Yanina
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Acevedo, Matías
Author
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Cuevas, Elfego
Author
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Bravo, Camila
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Cragnolini, Margherita
Author
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Rozzi, Ricardo
Author
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Poulin, Elie
Author
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Mueller, Jakob C.
Author
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Kempenaers, Bart
Author
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Vásquez Morales, Rodrigo
Admission date
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2020-10-28T22:00:27Z
Available date
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2020-10-28T22:00:27Z
Publication date
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2020
Cita de ítem
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Scientific Reports (2020) 10:9409
es_ES
Identifier
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10.1038/s41598-020-66450-7
Identifier
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https://repositorio.uchile.cl/handle/2250/177441
Abstract
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Understanding the population genetic consequences of habitat heterogeneity requires assessing whether patterns of gene flow correspond to landscape configuration. Studies of the genetic structure of populations are still scarce for Neotropical forest birds. We assessed range-wide genetic structure and contemporary gene flow in the thorn-tailed rayadito (Aphrastura spinicauda), a passerine bird inhabiting the temperate forests of South America. We used 12 microsatellite loci to genotype 582 individuals from eight localities across a large latitudinal range (30 degrees S-56 degrees S). Using population structure metrics, multivariate analyses, clustering algorithms, and Bayesian methods, we found evidence for moderately low regional genetic structure and reduced gene flow towards the range margins. Genetic differentiation increased with geographic distance, particularly in the southern part of the species' distribution where forests are continuously distributed. Populations in the north seem to experience limited gene flow likely due to forest discontinuity, and may comprise a demographically independent unit. The southernmost population, on the other hand, is genetically depauperate and different from all other populations. Different analytical approaches support the presence of three to five genetic clusters. We hypothesize that the genetic structure of the species follows a hierarchical clustered pattern.
es_ES
Patrocinador
dc.description.sponsorship
Max Planck Society
Foundation CELLEX
Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
CONICYT FONDECYT
3110059
11130245
1100359
1140548
Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
ICM-P05-002
PFB-23
AFB-170008
63130100
PAIFAC 2019 (Sciences Faculty, Universidad de Chile)
Sub-Antarctic Biocultural Conservation Program of the University of North Texas
COLFUTURO' scholarship-loan PCB-2012