Table 2.
Summary of relationships amongst environmental factors and bacteria communities
| Soil and environmental variables | R 2 | Correlation | ||
|---|---|---|---|---|
| Axis 1 | Axis 2 | Axis 3 | ||
| pH (CaCl2) | 0.71*** | − | − | + |
| C:N ratioa | 0.52*** | + | − | + |
| Volumetric water content (m3 m3 −1) | 0.49*** | + | − | + |
| Bulk density (g cm3 −1) | 0.47*** | − | + | − |
| Organic matter (% LOI)b | 0.46*** | + | − | + |
| Elevation (m) | 0.45*** | + | − | − |
| Mean annual precipitation (mL) | 0.43*** | + | − | − |
| Total Cb | 0.39*** | + | − | + |
| Clay content (%)c | 0.33*** | − | + | − |
| Soil bound water (g water g dry soil−1) | 0.31*** | + | − | + |
| Soil water repellencyb,d | 0.27*** | + | − | − |
| Total N (%)b | 0.26*** | + | − | + |
| Sand content (%)c | 0.21*** | + | + | + |
| Collembolae | 0.09*** | − | + | − |
| Mitese | 0.06*** | + | + | − |
| Total P (mg kg−1)a | 0.06*** | − | − | − |
| Total mesofaunae | 0.06*** | + | + | − |
| Rock volume (mL) | 0.05** | − | + | − |
| Temperature (°C) | 0.03* | + | + | − |
+/− signify the direction of association between each variable and respective NMDS axes
aSquare-root-transformation
bLog10-transformation
cAitchison’s log-ratio transformation
dSoil water repellency was derived from median water drop penetration times (s)
eLog10 plus 1 transformation
***p < 0.001; **0.001 > p < 0.01; *0.01 > p < 0.05, and blank indicates p > 0.05