Table 1.

Summary of the phylogenetically-corrected models correlating monoterpene and isoprene emissions with foliar nitrogen (N) and phosphorus (P) concentrations and N:P ratio, leaf mass per area (LMA), mean annual precipitation (MAP), and type of plant (woody or non-woody). See Methods for further information on how the models were adjusted. Estimates (β ± SE) are standardised coefficients ± standard error. For the factor woody, the estimate reflects the change from non-woody to woody plants. ΔAICc indicates the difference in AICc between the general linear model and the model controlling for phylogeny; positive values indicate a better adjustment of the phylogenetic model. λ and α indicate the phylogenetic corrections for Gaussian and binomial models, respectively. Continuous variables indicated with “Ln” were log-transformed, except for models indicated with ^†. MTP and ISP emission rate were log-transformed to fit the models.

	MTP vs. ISP			MTP storage			MTP emission rate			ISP emission rate
	Estimate		P	Estimate		P	Estimate		P	Estimate		P
Foliar N				-1.41 ± 0.41		<0.0001				0.29 ± 0.12		0.0142
Ln Foliar P	2.25 ± 0.91		0.0092	0.75 ± 0.30†		0.0012	-0.41 ± 0.13†		0.0023	-0.20 ± 0.09		0.0363
Ln Foliar N:P	3.58 ± 1.24		0.0032				-0.36 ± 0.14		0.0104
LMA										0.17 ± 0.09		0.0773
MAP										0.18 ± 0.09		0.0345
Woody	6.75 ± 3.36		0.0417							0.87 ± 0.42		0.0382
ΔAICc	5.13			5.13			-0.94			16.28
λ							0.14			0.51
α	2.85			1.22