Coefficient of correlation between biome and environmental factors (Spearman).

Note: **Correlation is significant at the 0.01 level.*Correlation is significant at the 0.05 level (2-tailed). MAP (Mean annual precipitation), MAT (Mean annual temperature), TOC (Total organic carbon ), TP (Total phosphorous), AP (Available phosphorous ), TN (Total nitrogen ), BD (Soil bulk density), SWC (Soil water content), AGB (Aboveground biomass), BGB (Belowground biomass ) and R/S (the ratio of root and shoot). The sample size is 100.