ReadMe Filenames 1. Raw-Storgrundet.csv Spreadsheet of raw (unbinned) allele calls for 14 microsatellite loci, genotyped in 14 populations (48 individuals each) of Daphnia magna on the island of Storgrundet in the Tvarminne archipelago of Finland. Missing data are indicated by "NA". The spreadsheet contains a total of 672 multilocus genotypes. The first column contains an individual identifier, the next 28 columns contain the genotypes at each of 14 loci (2 columns per locus). The final column in the spreadsheet includes population identifiers for each sample (14 total populations). These data were used to produce the Recoded-Storgrundet data, by binning alleles with the same number of repeats, subtracting the smallest allele size, and dividing by the repeat unit (2-3 bp). 2. Recoded-Storgrundet.csv Spreadsheet of recoded (binned) allele calls for 14 microsatellite loci, genotyped in 14 populations (48 individuals each) of Daphnia magna on the island of Storgrundet in the Tvarminne archipelago of Finland. Missing data are indicated by "NA". The spreadsheet contains a total of 672 multilocus genotypes. The first column contains an individual identifier, the next 28 columns contain the genotypes at each of 14 loci (2 columns per locus). The final column in the spreadsheet includes population identifiers for each sample (14 total populations). These data were used to calculate statistics reported in the associated manuscript. 3. SampleSites.xls Spreadsheet of GPS coordinates for each sampled population (1-14) from Storgrundet. All data for this project were collected by John Robinson (robinson.johnd@gmail.com), a student at the University of Georgia (Department of Genetics), under the direction of Dr. John Wares.