The difference in mean absolute relative error (%) between genetic distance estimators for under-sampled sites.

1Marten data are not genetically clustered (K = 1); fisher data are genetically clustered (K = 5)2The sites that we added back into the analysis were either the least or the most connected (according to eigenvector centrality estimates). The individuals that we added to each site had either common or rare genotypes (according to scores on the first principal component)3Comparisons that are significantly different are in bold font at α = 0.05 based on permutation tests4Cohen's [38] effect size, where d = 0.2 is a small effect, d = 0.5 is a medium effect, and d = 0.8 is a large effect (large effects are in bold font)