Table 5 Correlation coefficients of soil and microbial community characteristics with the first and second axis of phospholipid fatty acid (PLFA) nonmetric multidimensional scaling (NMS).

Variable	r²	Initial p	P_corr
MBN	0.9060	0.001	0.002	**
MBC	0.8789	0.001	0.002	**
Soil moisture	0.7765	0.001	0.002	**
N mineralization potential (N Min_pot)	0.7607	0.001	0.002	**
pH	0.7333	0.005	0.010	**
minT_av15	0.7316	0.001	0.002	**
dTmin_2–15	0.7175	0.001	0.002	**
minT_av2-15	0.6912	0.001	0.002	**
AugT₁₅	0.6878	0.001	0.002	**
OM	0.6702	0.001	0.002	**
dTmin₁₅	0.6551	0.001	0.002	**
SOC	0.6536	0.001	0.002	**
T_av2-15	0.6420	0.001	0.002	**
T_av15	0.6351	0.002	0.004	**
Nitrification potential (Nitrif_pot)	0.5922	0.001	0.002	**
N_tot	0.5900	0.002	0.004	**
Cumulative N nitrification (N Cum)	0.5716	0.001	0.002	**
NO₃⁻	0.4728	0.019	0.037	*
K⁺	0.4480	0.022	0.043	*
C:N	0.4386	0.027	0.052	NS
Mg⁺⁺	0.3533	0.066	0.128	NS
CaCO₃	0.3199	0.060	0.116	NS
Clay	0.2973	0.091	0.176	NS
P_tot	0.2348	0.164	0.318	NS
NH₄⁺	0.2004	0.229	0.444	NS
Sand	0.1727	0.305	0.591	NS
Silt	0.1086	0.464	0.899	NS
C:P	0.1041	0.458	0.887	NS
N:P	0.1041	0.478	0.926	NS
Ca⁺⁺	0.0884	0.545	>1	NS
Na⁺	0.0151	0.905	>1	NS

The R² denotes the proportion of explained variance and the p-value the significance of the correlations (p < 0.05). The corrected p* value indicates the probability at p = 0.05, after FDR procedure correction of p = 0.0031 (0.05/16) corrected associated one-tailed probability (p = 0.05) are indicated after the false discovery rate (FDR) procedure (Benjamini and Yekutieli 2001). PLFA relative abundance transformed data were used.
***0.001, **0.01, *0.05; probability correction with the False Discovery Rate (FDR) procedure was: P_corr = 0.05*31/16 (the 16^th ranked test yielded a p value lower than the initial p value; see text for explanation).

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