Table 2. Results of multiple matrix regression with randomization (MMRR) testing for the relationships between population genetic differentiation (FST) and explanatory variables representing weighted topographic distance (isolation by distance, IBDWTD), climatic dissimilarity (isolation by environment, IBECLI) and alternative isolation by resistance (IBR) scenarios. IBR scenarios consist of current and past habitat suitability based on (i) only climatic variables (*CurrentENV, and LGMENV), (ii) climate-based habitat suitability maps for host species (CurrentHOST, LGMHOST), and (iii) combining climatic variables climate-based habitat suitability maps for host species (*CurrentENV-HOST and LGMENV-HOST). IBRNULL represents an IBR scenario where all pixel values are equal to 1 (flat landscape). β, regression coefficient; t , t -statistic; p , significance level.