Datasets used in simulation exercise. 6 dataset are simulated under each of 3^3 = 27 scenarios with different values of competition variance, spatial range of autocorrelation and correlation between
Best k corresponds to the detected optimal number of populations, the FCT value of optimal k and associated probability (P) are shown. For the two taxa that have optimal k >2, the corresponding FCT is
Geographic distances among study samples (in km) used in our Mantel tests: See Fig. 1 in Roitberg et al. (2015) for geographic map and Table 1 for the phenotypic characteristics of the study samples
