Table 6. Best general linear model for the relationship of PC1 with ecosystem properties.

Source	Sum of Squares	Df	Mean Square	F-Ratio	P-Value
Model	106.2	3	35.4	25.71	<0.0001
Residual	38.55	28	1.37
Nsoil	6.37	1	52.15	37.88	0.0401
pH	26.14	1	26.14	18.99	0.0002
Clitter	52.16	1	52.16	37.88	<0.0001
Residual	38.55	28	1.37
Total (corrected)	144.76	31