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Table 3 Spearman’s correlation of environmental variables to prokaryotic community structures of dominant modules in networks tested by partial Mantel test (permutations: 9999)

From: The core populations and co-occurrence patterns of prokaryotic communities in household biogas digesters

  pH Phosphate NH4 +-N COD
(1) All samples 0.223** 0.046 0.264** 0.162*
 AM1 0.056 0.111 0.021 0.138*
 AM4 −0.011 −0.026 0.012 0.006
 AM5 0.244** −0.026 0.246** −0.07
 AM7 0.147* 0.139* 0.347** 0.323**
 AM8 0.059 −0.026 0.110* 0.044
(2) Cluster I 0.165 0.162 0.331* 0.223
 C1M0 0.263* 0.069 0.135 0.132
 C1M1 0.027 0.033 0.194 0.117
 C1M2 0.084 −0.065 0.401** 0.394**
 C1M4 0.206* 0.309** 0.300* 0.177
 C1M6 −0.084 0.330** 0.067 0.123
(3) Cluster II 0.398** 0.02 0.384** 0.157
 C2M0 0.061 −0.051 0.03 −0.083
 C2M1 0.295** −0.058 0.317** −0.04
 C2M2 0.402** 0.194* 0.487** 0.203*
 C2M4 0.043 −0.095 −0.048 0.029
 C2M5 0.167* −0.038 0.303** 0.323**
 C2M6 0.081 −0.158 0.009 0.1
 C2M8 0.164 0.004 0.184* 0.125
  1. ** Significant at p < 0.01, * significant at p < 0.05
  2. When one environmental variable was analyzed by the partial Mantel test, the remaining three environmental variables were controlled