Fig. 3
a Leaf area (mm2), b specific leaf area (mm2 mg−1), c leaf nitrogen content (%), d leaf phosphorus content (%), e leaf carbon content (%), and f leaf C/N ratio of Acer pseudosieboldianum along the elevation gradient in the study area. Regression coefficients (R (Atkin et al. 2006)) and P values are given for linear models with slopes showing a significant difference from zero