Variable importance from 22 Random Forest species distribution models for the particularly dry period, 1987–1992.

Top ten variables shown in descending order of rank. Variable categories were denoted by W (wetland), U (upland), P (precipitation), and T (temperature). Signs indicated the relationship between the predictor and the species response: + (positive), - (negative), m (unimodel), and ∼ (equivocal).

按排名降序排列的前十项变量。变量类别由W（湿地，wetland）、U（旱地，upland）、P（降水，precipitation）及T（气温，temperature）标注。符号用以表征预测因子与物种响应之间的关系：+（正相关）、-（负相关）、m（单峰型）以及∼（模糊不确定）。