Table 3.

Spearman’s correlation coefficients between the relative abundance of the dominant microbes (at phylum and genus level, respectively) and environmental variables.

	N	P	SK	SCu	SZn	SCr	SMn	pH	Water content	SOM
Proteobacteria	0.344	-0.158	0.482*	0.333	0.154	0.207	-0.311	-0.211	0.143	0.214
Devosia	0.413	0.142	0.056	0.002	0.021	-0.433	0.010	-0.560*	-0.440	-0.470*
Desulfobacter	0.494*	0.382	0.488*	0.665**	0.343	0.910**	0.488*	0.073	0.905**	0.903**
Hydrogenophaga	-0.207	0.085	0.199	0.042	0.169	0.593**	0.568*	0.091	0.647**	0.643**
Rhodoferax	-0.076	-0.104	0.437	0.199	0.453	0.669**	0.162	0.119	0.736**	0.759**
Thiobacillus	0.068	-0.010	0.459	0.317	0.497*	0.706**	0.033	0.068	0.718**	0.766**
Azovibrio	0.252	0.297	0.387	0.376	0.318	0.757**	0.222	0.141	0.781**	0.856**
Geobacter	0.211	0.343	0.291	0.448	0.173	0.832**	0.480*	0.290	0.818**	0.888**
Rhodobacter	0.056	0.067	0.482*	0.320	0.347	0.764*	0.417	0.004	0.790**	0.792**
Skermanella	-0.020	0.061	-0.300	-0.380	0.160	-0.489*	0.162	-0.415	-0.454	-0.462
Firmicutes	0.202	0.353	0.247	0.362	0.129	0.791**	0.432	0.416	0.769**	0.820**
Virgibacillus	-0.022	0.129	-0.067	-0.257	0.290	-0.074	0.332	-0.237	0.099	0.045
Clostridium	0.207	0.349	0.247	0.487*	0.166	0.859**	0.330	0.447	0.801**	0.808**
Proteiniclasticum	0.133	0.199	0.340	0.312	0.113	0.696**	0.566*	-0.028	0.637**	0.644**
PSB-M-3	0.020	0.228	0.217	0.323	0.083	0.767**	0.525*	0.361	0.748**	0.753**
Bacteroidetes	-0.250	-0.211	0.364	0.183	0.046	0.635**	0.364	0.083	0.620**	0.604**
Paludibacter	0.443	0.373	0.405	0.627**	0.257	0.875**	0.588*	0.108	0.859**	0.859**
Flavobacterium	-0.206	-0.154	0.380	0.137	0.394	0.638**	0.215	0.102	0.699**	0.689**
Actinobacteria	-0.099	-0.086	-0.160	-0.474*	-0.090	-0.706**	-0.086	-0.575*	-0.645**	-0.668**
Iamia	0.190	0.193	-0.359	-0.207	0.016	-0.570*	-0.060	-0.229	-0.624**	-0.638**
Arthrobacter	0.026	0.004	-0.068	-0.416	0.016	-0.530*	-0.080	-0.526*	-0.528*	-0.477*
Acidobacteria	-0.379	-0.361	-0.297	-0.634**	-0.065	-0.765**	-0.366	-0.349	-0.752**	-0.695**
Candidatus Solibacter	-0.266	0.193	-0.316	-0.298	0.163	-0.095	-0.232	0.421	-0.047	-0.024
Chloroflexi	-0.265	-0.541*	0.162	-0.216	0.521*	-0.208	-0.236	-0.367	-0.102	-0.156
WCHB1-05	0.110	-0.037	0.591**	0.404	0.368	0.774**	0.125	0.045	0.803**	0.828**
Anaerolinea	-0.309	-0.233	0.328	0.063	0.237	0.573*	0.075	0.118	0.579*	0.622**
Euryarchaeota	-0.069	-0.154	0.057	-0.028	0.036	-0.128	-0.003	-0.549*	-0.242	-0.282
Methanosarcina	0.168	0.194	0.338	0.333	0.220	0.604**	0.793**	-0.264	0.634**	0.590*
Crenarchaeota	-0.160	0.072	-0.342	-0.416	-0.100	-0.617**	-0.152	-0.269	-0.596**	-0.577*
Candidatus Nitrososphaera	-0.270	-0.025	-0.401	-0.517*	-0.269	-0.736**	0.124	-0.414	-0.674**	-0.717**

^∗∗Means the correlation is significant at the p < 0.01 level. ^∗Means the correlation is significant at the p < 0.05 level.