Table 2.

Statistical model for altitude-related variation in stomata and vein trait as a function of mean annual temperature (MAT), total nitrogen (TN), total phosphorus (TP).

	SD				VLA			SV
	df	Estimate	SS%	P	Estimate	SS%	P	Estimate	SS%	P
Intercept	223	241.32			7.17			40.23
MAT	223	-4.95	2.00	0.01	-0.09	2.10	0.66	-0.42	0.58	0.56
TN	223				-0.27	0.41	0.80	-1.84	0.17	0.60
TP	223	-94.10	1.00	0.09
R2m			3.00			2.51			0.75
R2c			3.00			19.23			1.93

df, degree freedom; SS%, percentage of sum of squares explained. Linear mixed-effects model was fit by restricted maximum likelihood. Random effects in model were ‘altitude’. Marginal R² (R²m) is concerned with variance explained by fixed factors, and conditional R² (R²c) is concerned with variance explained by both fixed and random factors. Trait abbreviations are provided in Table 1 .