TABLE 3.

Variation partitioning of fungal communities based on three beta-diversity indices^a

Beta-diversity index and component	Variation explained (%)
	0-10cm layer	10-20cm layer	20-40cm layer
Sørensen’s index
[E|S]	1.47	4.26**	1.32
[S|E]	4.06**	6.58**	2.53*
[E∩S]	0.01	1.04	1.68
[R]	94.46	88.12	94.47
Bray-Curtis dissimilarity
[E|S]	6.39**	0.74	NS
[S|E]	3.41**	12.97***	NS
[E∩S]	1.51	4.35	NS
[R]	88.69	81.94	NS
Jaccard distance
[E|S]	3.21**	2.89**	1.01
[S|E]	2.20**	4.52**	1.82*
[E∩S]	0.44	0.63	1.08
[R]	94.15	91.95	96.09

^aFour different components are shown: pure environmental fraction ([E|S]), pure spatial fraction ([S|E]), shared fraction of environmental and spatial effects ([E∩S]), unexplained fraction ([R]). Values shown in boldface type showed significant effects. *, **, and *** indicate significant effects at P < 0.05, 0.01, and 0.001, respectively. NS indicates that variation partitioning could not be conducted because the subset of environmental variable was lacking.