Table 2. Importance (Imp.) of IBD, IBRTerrain, IBRHabitat, IBI and IBE on explaining population genetic differentiation (FST) as assessed through GDM (compare Table S20, Figs. S4-S10); Imp.-1/-2/-3 give models where, sequentially, the respective explanatory variable(s) contributing least to model fit were removed (indicated by empty space). Note that models may fail to fit if relationships between FST and (some) explanatory variables are weak (indicated by “/”).