Table 3. Results of regressions between environmental variables and relative abundances of Thaumarchaeota, Archaea, and Bacteria.
| Variables | Regression coefficient (β1) | Standardized Regression | Coefficient of determination (R2) | Analysis of variance (ANOVA) | ||
|---|---|---|---|---|---|---|
| Response (dependent) | Explanatory (independent) | F statistic | P value | |||
| coefficient | ||||||
| Thaumarchaeota (RTHAUM) | Water content | -1.081 a | -0.599 | 0.359 | 14.0 | 0.001 |
| Total carbon | -0.504 | -0.563 | 0.317 | 11.6 | 0.002 | |
| Total nitrogen | -0.519 | -0.708 | 0.501 | 25.1 | <0.001 | |
| NH4 +-N | -0.517 | -0.675 | 0.456 | 20.9 | <0.001 | |
| NO3 −-N | -0.759 | -0.569 | 0.324 | 12.0 | 0.002 | |
| Total sulfur | -0.584 | -0.612 | 0.374 | 15.0 | 0.001 | |
| Archaea (RARCH) | Water content | -0.467 | -0.413 | 0.170 | 5.1 | 0.032 |
| Total carbon | -0.222 | -0.396 | 0.157 | 4.6 | 0.041 | |
| Total nitrogen | -0.231 | -0.502 | 0.252 | 8.4 | 0.008 | |
| NH4 +-N | -0.264 | -0.550 | 0.302 | 10.8 | 0.003 | |
| NO3 −-N | -0.170 | -0.204 | 0.041 | 1.1 | 0.308 | |
| Total sulfur | -0.178 | -0.297 | 0.088 | 2.4 | 0.132 | |
| Bacteria (RBACT) | Water content | 0.010 | 0.317 | 0.100 | 2.8 | 0.107 |
| Total carbon | 0.005 | 0.315 | 0.099 | 2.8 | 0.109 | |
| Total nitrogen | 0.005 | 0.420 | 0.176 | 5.4 | 0.029 | |
| NH4 +-N | 0.006 | 0.474 | 0.225 | 7.3 | 0.012 | |
| NO3 −-N | 0.002 | 0.082 | 0.007 | 0.2 | 0.685 | |
| Total sulfur | 0.003 | 0.197 | 0.039 | 1.0 | 0.326 | |
a Significant (p < 0.05) correlations are displayed in bold.