Fig. 2From: Leaf ecological stoichiometry and anatomical structural adaptation mechanisms of Quercus sect. Heterobalanus in southeastern Qinghai–Tibet PlateauEcological stoichiometric characteristics in leaves of six QSH species. Different lowercase letters indicate significant differences among species (P < 0.05). CV is the coefficient of variation. Values are the mean ± SE, n ≥ 3Back to article page