DOI: 10.5061/dryad.k4064
title: Data from: Echoes of a distant time: effects of historical processes on contemporary genetic patterns in Galaxias platei in Patagonia

description: 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.
description: 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.