Table 3. Relative importance (I) of explanatory variables among all model compilations (n=32). 1.00 indicates that the particular variable is selected in all models, whereas 0 represents that the variable is not selected in any of the models. indicates positive and negative relation “+” “‒“ between the beta diversity coefficient and that environmental variable. If a given variable was not included among the most important beta diversity models (AICc < 2.0), then the direction of influence was obtained from a full model including all the candidate variables. I: Importance, D: Direction of influence, Altitude: Altitudinal range, Alkalinity: Alkalinity range, Extent: Spatial extent of a region, Organic C: Soil organic carbon range, Waters: areal extent of water within a region as proportion of total spatial extent. Multiple site beta diversity Pair-wise beta diversity Sørensen Species Nestedness Sørensen Species Nestedness turnover turnover I D I D I D I D I D I D Altitude 0.80 + 0.90 + 0.85 0.82 + 0.90 + 0.89 ‒ ‒ Waters 0.33 0.30 0.23 + 0.26 0.25 0.17 + ‒ ‒ ‒ ‒ Latitude 0.32 + 0.24 + 0.18 0.26 + 0.21 + 0.18 ‒ ‒ Alkalinity 0.25 + 0.22 + 0.20 0.24 + 0.22 + 0.17 ‒ ‒ Organic 0.16 0.19 0.20 0.16 0.16 + 0.17 ‒ ‒ ‒ ‒ ‒ C Extent 0.16 0.17 0.20 0.16 0.16 0.17 + ‒ ‒ ‒ ‒ ‒
Table 3. Relative importance (I) of explanatory variables among all model compilations (n=32). 1.00 indicates that the particular variable is selected in all models, whereas 0 represents that the variable is not selected in any of the models. “+” indicates positive and “‒“ negative relation between the beta diversity coefficient and that environmental variable. If a given variable was not included among the most important beta diversity models (AICc < 2.0), then the direction of influence was obtained from a full model including all the candidate variables. I: Importance, D: Direction of influence, Altitude: Altitudinal range, Alkalinity: Alkalinity range, Extent: Spatial extent of a region, Organic C: Soil organic carbon range, Waters: areal extent of water within a region as proportion of total spatial extent. Multiple site beta diversity Pair-wise beta diversity Sørensen Species turnover Nestedness Sørensen Species turnover Nestedness I D I D I D I D I D I D Altitude 0.80 + 0.90 + 0.85 ‒ 0.82 + 0.90 + 0.89 ‒ Waters 0.33 ‒ 0.30 ‒ 0.23 + 0.26 ‒ 0.25 ‒ 0.17 + Latitude 0.32 + 0.24 + 0.18 ‒ 0.26 + 0.21 + 0.18 ‒ Alkalinity 0.25 + 0.22 + 0.20 ‒ 0.24 + 0.22 + 0.17 ‒ Organic C 0.16 ‒ 0.19 ‒ 0.20 ‒ 0.16 ‒ 0.16 + 0.17 ‒ Extent 0.16 ‒ 0.17 ‒ 0.20 ‒ 0.16 ‒ 0.16 ‒ 0.17 +
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