Oak species variation in leaf traits.

Results from general linear mixed models to quantify variation among oak species in leaf traits associated with resource use (leaf water content, specific leaf area [SLA] in cm2 g-1, and nitrogen [N] and phosphorus [P] concentration in mg g-1 dry weight) or herbivore resistance (lignins, hydrolysable tannins, condensed tannins, and flavonoids, in mg g-1 dry weight). Descriptive statistics (least square means ± standard error and species range) are shown. Sample sizes per species = 12 in all cases (total N = 132). Inferential statistics are not appropriate due to strong multicollinearity between traits.