FIGURE 3.

Summary of the partial general linear models (GLM) for the effects (R², %) of climate, soil nutrient level, and species group on NRE, PRE, and NRE:PRE. A, B, and C denote the independent effects of climate, soil nutrient level, and species group, respectively, AB, AC, and BC are the interactive effects between climate and soil nutrient level, climate and species group, soil nutrient level, and herbaceous type, respectively, ABC represents the interactive effect among three different factors (A) Full model for NRE: 11.7; (B) Full model for PRE: 9.8; (C) Full model for NRE:PRE: 17.9.