Environmental variables ranked according to the proportion of explained variation in the composition of grassland and alien species, when each variable was analyzed individually with the respective species data.

Environmental variables ranked according to the proportion of explained variation in the composition of grassland and alien species, when each variable was analyzed individually with the respective species data.当采用对应物种数据对每个环境变量单独开展分析时，依据草地群落与外来物种种群组成的解释变异（explained variation）占比，对环境变量进行排序。