10.5061/DRYAD.K4064
Vera-Escalona, Iván
Dalhousie University
Ruzzante, Daniel E.
Dalhousie University
Habit, Evelyn
University of Concepción
Data from: Echoes of a distant time: effects of historical processes on
contemporary genetic patterns in Galaxias platei in Patagonia
Dryad
dataset
2015
Paleolake
Galaxias platei
Holocene
2015-07-07T14:07:03Z
2015-07-07T14:07:03Z
en
https://doi.org/10.1111/mec.13303
758623 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Interpreting the genetic structure of a metapopulation as the outcome of
gene flow over a variety of timescales is essential for the proper
understanding of how changes in landscape affect biological connectivity.
Here we contrast historical and contemporary connectivity in two
metapopulations of the freshwater fish Galaxias platei in northern and
southernmost Patagonia where paleolakes existed during the Holocene and
Pleistocene, respectively. Contemporary gene flow was mostly high and
asymmetrical in the northern system while extremely reduced in the
southernmost system. Historical migration patterns were high and symmetric
in the northern system and high and largely asymmetric in the southern
system. Both systems showed a moderate structure with a clear pattern of
isolation by distance (IBD). Effective population sizes were smaller in
populations with low contemporary gene flow. An approximate Bayesian
computation (ABC) approach suggests a late Holocene colonization of the
lakes in the northern system and recent divergence of the populations from
refugial populations from east and west of the Andes. For the southern
system, the ABC approach reveals that some of the extant G. platei
populations most likely derive from an ancestral population inhabiting a
large Pleistocene paleolake while the rest derive from a higher-altitude
lake. Our results suggest that neither historical nor contemporary
processes individually fully explain the observed structure and geneflow
patterns and both are necessary for a proper understanding of the factors
that affect diversity and its distribution. Our study highlights the
importance of a temporal perspective on connectivity to analyse the
diversity of spatially complex metapopulations.
Genepop file for the San Pedro systemGenepop file for the San Pedro
system. 363 individuals, 5 populations and 14
microsatelliteSanPedro_genepop.txtGenepop file for the Serrano
system.Genepop file for the Serrano system. 554 individuals, 8 populations
and 16 microsatelliteSerrano_genepop.txtBayesass - SanPedroBayesAss file
containing the microsatellite data (14 markers) of the freshwater fish
Galaxias platei in the San Pedro system in Northern Patagonia.Bayesass -
SerranoBayesAss file containing the microsatellite data (16 markers) of
the freshwater fish Galaxias platei in the Serrano system in Southern
Patagonia.Migrate - SanPedroMIGRATE-n file containing the microsatellite
data (14 markers) of the freshwater fish Galaxias platei in the San Pedro
system in Nothern Patagonia. The parmfile for this run is included in the
readme file.Migrate - SerranoMIGRATE-n file containing the microsatellite
data (16 markers) of the freshwater fish Galaxias platei in the Serrano
system in Southern Patagonia. The parmfile for this run is included in the
readme file.Mantel - San PedroGeographic and genetic distance for Galaxias
platei individuals from the San Pedro system. These distance matrices were
used for the Mantel test.Mantel - SerranoGeographic and genetic distance
for Galaxias platei individuals from the Serrano system. These distance
matrices were used for the Mantel test.
Torres del Paine
San Pedro - Valdivia
Chile
Patagonia