Data from: Genomic variation in a widespread Neotropical bird (Xenops minutus) reveals divergence, population expansion, and gene flow

The demographic and phylogeographic histories of species provide insight
into the processes responsible for generating biological diversity, and
genomic datasets are now permitting the estimation of species histories
with unprecedented accuracy. We used a genomic single nucleotide
polymorphism (SNP) dataset generated using a RAD-Seq method to investigate
the historical demography and phylogeography of a widespread lowland
Neotropical bird (Xenops minutus). As expected, we found that prominent
landscape features that act as dispersal barriers, such as Amazonian
rivers and the Andes Mountains, are associated with the deepest
phylogeographic breaks, and also that isolation by distance is limited in
areas between these barriers. In addition, we inferred positive population
growth for most populations and detected evidence of historical gene flow
between populations that are now physically isolated. Although we were
able to reconstruct the history of Xenops minutus with unprecedented
resolution, we had difficulty conclusively relating this history to the
landscape events implicated in many Neotropical diversification
hypotheses. We suggest that even if many traditional diversification
hypotheses remain untestable, investigations using genomic datasets will
provide greater resolution of species histories in the Neotropics and
elsewhere.