Mean permutation importance of the predictor groups, cluster id's and the corresponding cluster membership grades.

Table values indicate average permutation importance in percent of each predictor group: climate (C), altitude (H) and hydromorphology (HY). Members of the C group are AnnTMean, Isotherm, TSeason and AnnPMean, in the HY group are Strahler, CumLenkm and RtypMost while H is based on the permutation importance of AltMean. Degree to which each species belong to a Fuzzy cluster Fc is indicated by the membership grade MG.表格中的数值为各预测因子组的平均置换重要性（permutation importance，以百分比计）：气候组（C）、海拔组（H）与水文地貌组（HY）。气候组（C）的成员包括年平均气温（AnnTMean）、等温性（Isotherm）、气温季节变率（TSeason）与年平均降水量（AnnPMean）；水文地貌组（HY）的成员为斯特拉勒指数（Strahler）、总河长（千米，CumLenkm）与主要河流类型（RtypMost）；海拔组（H）的置换重要性基于平均海拔（AltMean）计算得到。各物种归属模糊聚类（Fuzzy cluster）Fc的程度由隶属度（membership grade）MG表征。