10.5061/DRYAD.8H6K1
Perez, Manolo
Bonatelli, Isabel A. S.
Federal University of São Carlos
Moraes, Evandro
Carstens, Bryan C.
The Ohio State University
Data from: Model-based analysis supports interglacial refugia over
long-dispersal events in the diversification of two South American cactus
species
Dryad
dataset
2016
Cactaceae
Pilosocereus aurisetus aurisetus
Pilosocereus aurisetus aurilanatus
Quaternary
model-based analysis
Pilosocereus machrisii
Microrefugia
2016-02-09T14:58:23Z
2016-02-09T14:58:23Z
en
https://doi.org/10.1038/hdy.2016.17
145798 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Pilosocereus machrisii and P. aurisetus are cactus species within the P.
aurisetus complex, a group of eight cacti that are restricted to rocky
habitats within the Neotropical savannas of eastern South America.
Previous studies have suggested that diversification within this complex
was driven by distributional fragmentation, isolation leading to
allopatric differentiation, and secondary contact among divergent
lineages. These events have been associated with Quaternary climatic
cycles, leading to the hypothesis that the xerophytic vegetation patches
which presently harbor these populations operate as refugia during the
current interglacial. However, owing to limitations of the standard
phylogeographic approaches used in these studies, this hypothesis was not
explicitly tested. Here we use Approximate Bayesian Computation to refine
the previous inferences and test the role of different events in the
diversification of two species within P. aurisetus group. We used
molecular data from chloroplast DNA and simple sequence repeats loci of P.
machrisii and P. aurisetus, the two species with broadest distribution in
the complex, in order to test if the diversification in each species was
driven mostly by vicariance or by long-dispersal events. We found that
both species were affected primarily by vicariance, with a refuge model as
the most likely scenario for P. aurisetus and a soft vicariance scenario
most probable for P. machrisii. These results emphasize the importance of
distributional fragmentation in these species, and add support to the
hypothesis of long-term isolation in interglacial refugia previously
proposed for the P. aurisetus species complex diversification.
Perezetal_2016_Pilosocereus_SSRdataSSR data from populations of
Pilosocereus aurisetus and P. machrisii species
(Cactaceae)Perez_etal_2016_Pilosocereus.xlsxrunms_PaurA python script to
draw values for the parameters tau, theta, ancient migration, current
migration, bottleneck and population expansion. This file contains the 7
models tested in this study and outputs the ms' simulation results
for both cpDNA and SSR markers in the species P. aurisetus.runms_PmacA
python script to draw values for the parameters tau, theta, ancient
migration, current migration, bottleneck and population expansion. This
file contains the 7 models tested in this study and outputs the ms'
simulation results for both cpDNA and SSR markers in the species P.
machrisii.runPPC_PaurRetrieve parameter values from the parameter
estimates of the selected in the P. aurisetus dataset and use them to
simulate new data to perform PPC analysis.runPPC_PmacRetrieve parameter
values from the parameter estimates of the selected in the P. machrisii
dataset and use them to simulate new data to perform PPC
analysis.microsat2arpA python script that converts the microsatellite data
from ms' accessory program microsat to the arlequin format.
Rock Outcrops
Eastern South America
Campos Rupestres