10.5061/DRYAD.280GB5MND
Buainain, Nelson
National Institute of Amazonian Research
Canton, Roberta
Louisiana State University
Zuquim, Gabriela
University of Turku
Tuomisto, Hanna
University of Turku
Hrbek, Tomas
Federal University of Amazonas
Sato, Hiromitsu
University of Toronto
Ribas, Camila
National Institute of Amazonian Research
Data from: Paleoclimatic evolution as the main driver of current genomic
diversity in the widespread and polymorphic Neotropical songbird Arremon
taciturnus
Dryad
dataset
2020
Arremon
Oscines
2020-06-29T00:00:00Z
2020-06-29T00:00:00Z
en
7898344267 bytes
2
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Several factors have been proposed as drivers of species diversification
in the Neotropics, including environmental heterogeneity, the development
of drainage systems and historical changes in forest distribution due to
climatic oscillations. Here, we investigate which drivers contributed to
the evolutionary history and current patterns of diversity of a
polymorphic songbird (Arremon taciturnus) that is widely distributed in
Amazonian and Atlantic forests as well as in Cerrado gallery and
seasonally-dry forests. We use genomic, phenotypic and habitat
heterogeneity data coupled with climatic niche modeling. Results suggest
the evolutionary history of the species is mainly related to paleoclimatic
changes, although changes in the strength of the Amazon river as a barrier
to dispersal, current habitat heterogeneity and geographic distance were
also relevant. We propose an ancestral distribution in the Guyana Shield,
and recent colonization of areas south of the Amazon river at ~380–166
kya, expansion of distribution to southern Amazonia, Cerrado and the
Atlantic Forest. Since then, populations south of the Amazon River have
been subjected to cycles of isolation and possibly secondary contact due
to climatic changes that affected habitat heterogeneity and population
connectivity. Most Amazonian rivers are not associated to long lasting
isolation of populations, but some might act as secondary barriers,
susceptible to crossing under specific climatic conditions. Morphological
variation, while stable in some parts of the distribution, is not a
reliable indicator of genetic structure or phylogenetic relationships.
files descriptions: *UCE.zip - raw data and cleanreads for the UCE dataset
*ddRAD.zip - raw and demultiplexed data for the ddRAD dataset input.zip -
input files (alignments and SNP matrices) for STRUCTURE, G-PHOCS, IQ-TREE,
SVDQuartets and ARLEQUIN env.zip - raw environmental variables used to
generate environmental distances, and isolation by resistance matrix
generated by circuitscape used as climatic distance matrix. *barcodes
information necessary to demultiplex files can be found inside each
dataset type (UCE/ddRAD) folder.