Show simple item record Botero-Delgadillo, Esteban Quirici, Verónica Poblete, Yanina Cuevas, Élfego Kuhn, Sylvia Girg, Alexander Teltscher, Kim Poulin, Elie Kempenaers, Bart Vasquez, Rodrigo A.
dc.coverage.spatial Fray Jorge National Park
dc.coverage.spatial Northern Chile
dc.coverage.spatial Navarino Island
dc.coverage.spatial Southern Chile 2017-09-12T21:03:55Z 2017-09-12T21:03:55Z 2017-09-09
dc.identifier doi:10.5061/dryad.7tp60
dc.identifier.citation Botero-Delgadillo E, Quirici V, Poblete Y, Cuevas É, Kuhn S, Girg A, Teltscher K, Poulin E, Kempenaers B, Vásquez RA (2017) Variation in fine-scale genetic structure and local dispersal patterns between peripheral populations of a South American passerine bird. Ecology and Evolution 7(20): 8363-8378.
dc.description The distribution of suitable habitat influences natal and breeding dispersal at small spatial scales, resulting in strong micro-geographic genetic structure. Although environmental variation can promote inter-population differences in dispersal behavior and local spatial patterns, the effects of distinct ecological conditions on within-species variation in dispersal strategies and in fine-scale genetic structure remain poorly understood. We studied local dispersal and fine-scale genetic structure in the thorn-tailed rayadito (Aphrastura spinicauda), a South American bird that breeds along a wide latitudinal gradient. We combine capture-mark-recapture data from eight breeding seasons and molecular genetics to compare two peripheral populations with contrasting environments in Chile: Navarino Island, a continuous and low density habitat, and Fray Jorge National Park, a fragmented, densely populated and more stressful environment. Natal dispersal showed no sex bias in Navarino, but was female-biased in the more dense population in Fray Jorge. In the latter, male movements were restricted and some birds seemed to skip breeding in their first year, suggesting habitat saturation. Breeding dispersal was limited in both populations, with males being more philopatric than females. Spatial genetic autocorrelation analyses using 13 polymorphic microsatellite loci confirmed the observed dispersal patterns: a fine-scale genetic structure was only detectable for males in Fray Jorge for distances up to 450 m. Furthermore, two-dimensional autocorrelation analyses and estimates of genetic relatedness indicated that related males tended to be spatially clustered in this population. Our study shows evidence for context-dependent variation in natal dispersal and corresponding local genetic structure in peripheral populations of this bird. It seems likely that the costs of dispersal are higher in the fragmented and higher density environment in Fray Jorge, particularly for males. The observed differences in micro-geographic genetic structure for rayaditos might reflect the genetic consequences of population-specific responses to contrasting environmental pressures near the range limits of its distribution.
dc.relation.haspart doi:10.5061/dryad.7tp60/1
dc.relation.isreferencedby doi:10.1002/ece3.3342
dc.subject fine-scale genetic structure
dc.subject dispersal patterns
dc.subject capture-mark-recapture
dc.subject apparent survival
dc.title Data from: Variation in fine-scale genetic structure and local dispersal patterns between peripheral populations of a South American passerine bird
dc.type Article
dwc.ScientificName Aphrastura spinicauda
dc.contributor.correspondingAuthor Botero-Delgadillo, Esteban
prism.publicationName Ecology and Evolution

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