Figure 3

Mean and standard error for Mantel r coefficients computed between the matrix of genetic distances (calculated as Gd, Dps and Lrm) and the binary model (designed to separate the same and opposite sides of the barrier), controlling for the effect of Euclidean distances (see text for further explanation). Means are computed for plots belonging to each type of putative barrier (filled dots; R, H, CB) and compared to their control plots (empty dots).