Table 4.

Analyses of variance to test the effects of species and site on the first and second principal components of the PCA

Principal component	Effect	d.f.	Mean square	F-value	P-value
PC1	Species	59	4.699	28.5	0.000***
	Site	1	0.460	2.79	0.1n.s.
	Residuals	59	0.165
PC2	Species	59	3.363	11.1	0.000***
	Site	1	2.097	6.91	0.0109*
	Residuals	59	0.304