Fig. 2

The relative contributions of 16 environmental factors to the variation in leaf dry matter content (a), leaf area (b), specific leaf area (c), leaf C:N ratio (d), leaf N (e), leaf chlorophyll index (f), and leaf C (g). The positive/negative direction of each effect is indicated by its positive/negative value. ***P < 0.001; **P < 0.01; *P < 0.05