DOI: 10.5061/dryad.63p479j
title: Data from: Loss of genetic diversity, recovery, and allele surfing in a colonizing parasite, Geomydoecus aurei

description: Understanding the genetic consequences of changes in species distributions
 has wide-ranging implications for predicting future outcomes of climate
 change, for protecting threatened or endangered populations, and for
 understanding the history that has led to current genetic patterns within
 species. Herein, we examine the genetic consequences of range expansion
 over a 25-year period in a parasite (Geomydoecus aurei) that is in the
 process of expanding its geographic range via invasion of a novel host. By
 sampling the genetics of 1,935 G. aurei lice taken from 64 host
 individuals collected over this time period using 12 microsatellite
 markers, we test hypotheses concerning linear spatial expansion, genetic
 recovery time, and allele surfing. We find evidence of decreasing allelic
 richness with increasing distance from the source population, supporting a
 linear, stepping stone model of spatial expansion that emphasizes the
 effects of repeated bottleneck events during colonization. We provide
 evidence of post-bottleneck genetic recovery, with average allelic
 richness of infrapopulations increasing about 30% over the 225-generation
 span of time observed directly in this study. Our estimates of recovery
 rate suggest, however, that recovery has plateaued, and that this
 population may not reach genetic diversity levels of the source population
 without further immigration from the source population. Finally, we employ
 a grid-based sampling scheme in the region of ongoing population expansion
 and provide empirical evidence for the power of allele surfing to impart
 genetic structure on a population, even under conditions of selective
 neutrality and in a place that lacks strong barriers to gene flow.
description: Specimens table with
 localities final analysesSpecimen table with
 voucher numbers and localities as given in publication. Excel
 format.Msat data for 64
 infrapopulations 60 in Molecular Ecology paper + 4 from primer
 noteRaw microsatellite data
 given by specimen with allele sizes in base pairsAllele freq Geomydoecus
 12 loci 64 infrapop Allele freq no headersLouse allele frequencies
 for 12 microsatellite lociR scripts for
 DRYADR scripts used in
 analyses34 gophers
 GenePop34 gophers GenePop file
 (34 = all gophers south of the San Acacia constriction)39 gophers
 GenePop39 gophers GenePop file
 (39 gophers = north and south of San Acacia Constriction
 combined)39 gophers
 BfibBeta-fibrinogen gene
 sequence alignments for 39 gophers39 gophers
 COICOI gene sequence
 alignments for 39 gophers39 gophers
 IRBPIRBP gene sequence
 alignments for 39 pocket gophers39 gophers
 Rag1Rag1 gene sequence
 alignments for 39 gophers34 2016 gophers 4 genes
 3 pops.structureStructure input file for
 34 gophers from south of San Acacia constriction. Population names
 correspond with louse genetic groups.39 2016 gophers 4 genes
 3 pops.structureStructure input file for
 39 gophers from north and south of San Acacia constriction. Population
 names correspond with louse genetic groups. Mitochondrial alleles are
 coded with one missing allele per individual.LaJoyaOnlyGenePopGenePop file for lice north of the San Acacia constriction34 louse infrapopulationsGenePopLouse GenePop file for 34 2016-infrapopulations of lice from south of San Acacia constriction64 louse infrapopulations GenePop.genGenePop file for all lice included in studydiveRsity output_Allelic Richness_HO_HE_for_64_infrapopulationsdiveRsity output file for all lice included in study. AR, Ho, He are given.PopGenReport for all 2016 licePopGenReport for all 2016 licePopGenReport for 2016 lice south of San AcaciaPopGenReport for 2016 lice south of San AcaciaPopGenReport for 2016 LaJoya lice onlyPopGenReport for 2016 LaJoya lice only