Table 6.

Results of the multiple regression analysis on matrices analysis (MRM) for bacterial and fungal communities.

	Bacteria		Fungi
	R2= 0.515	R2= 0.515	R2= 0.536	R2= 0.543
	β-diversity	Replacement	β-diversity	Replacement
Ln (Geographic distance (km))			0.019∗∗∗	0.022∗∗∗
SM	0.035∗∗∗	0.036∗∗∗
TSP	0.015*	0.015*
TOC				0.018**
AN
pH	0.036∗∗∗	0.037∗∗∗	0.016**	0.009*
CN	0.029***	0.029**	0.017**	0.018**
AI	0.028**	0.029***	0.032∗∗∗	0.027∗∗∗
Altitude

d_BC, β-diversity; d_BC-bal, replacement component; d_BC-gra, nestedness component; TW, water saturation of total water holding capacity; TOC, soil total organic carbon; TSP, soil total phosphorus; CN, carbon/nitrogen; AI, aridity index. R² represents the variation of β-diversity or replacement component. The partial regression coefficients and associated P-values of the final model are reported from permutation test (nperm = 10,000) if its significance level is 0.05. ^∗P < 0.01, ^∗∗P < 0.001, and ^∗∗∗P < 0.0001. Values in bold indicate the relatively more important factors for bacterial and fungal communities, respectively.