Fig. 3

Leaf N and P concentrations, and N:P ratio in relation to Global R, Direct R and Diffuse R. Each point showed a log-transformed observation of Leaf N and P concentrations, and N:P ratio (n = 57). Significant linear regressions were shown for (b) Global R and leaf P concentration (R² = 0.2995, p < 0.001); (c) Global R and leaf N:P ratio (R² = 0.2835, p < 0.001); (e) Direct R and leaf P concentration (R² = 0.1537, p < 0.01); (f) Direct R and leaf N:P ratio (R² = 0.1514, p < 0.01); (h) Diffuse R and leaf P concentration (R² = 0.2979, p < 0.001); (i) Diffuse R and leaf N:P ratio (R² = 0.2790, p < 0.001)