Table 3.

Matrix of eigenvector loadings for physiological predictors for freshwater, coastal and marine plants. Most of the variance was explained by the first four principal components (97.1 %; 77.3 % was explained by the first two principal components).

Variable	Principal component
	1	2	3	4
Habitat	0.4854	−0.0142	−0.0723	0.8694
ɛ	0.4588	0.3445	−0.6181	−0.3294
θsym	−0.0938	0.9201	0.3652	0.1001
	−0.5604	−0.0399	−0.0368	0.2584
	−0.4806	0.1815	−0.6914	0.2427