Fig. 1From: Leaf ecological stoichiometry and anatomical structural adaptation mechanisms of Quercus sect. Heterobalanus in southeastern Qinghai–Tibet Plateau(a) Leaf C, N, and P contents and (b) stoichiometric ratios in trees and shrubs. The asterisk indicates a significant difference between trees and shrubs (P < 0.05). CV is the coefficient of variation. Values are the mean ± SE, n ≥ 3Back to article page