Table 4.
Relationship between soil properties, microbial functions, and microbial structure.Columns (A) and (B) list pearson correlation coefficients between soil properties and measurements of nitrification potential and denitrification potential, respectively. Column (C) lists Mantel correlation coefficients between weighted Unifrac distance, soil properties, and measurements of microbial function.
| (A) Nitrification potential | (B) Denitrification potential | (C) Weighted UniFrac distance | |
|---|---|---|---|
| [NH+4] | −0.14 | 0.11 | 0.24 |
| [NO−3] | 0.47* | 0.03 | 0.13 |
| Flux NH+4 | 0.02 | 0.14 | 0.07 |
| Flux NO−3 | 0.40 | 0.22 | −0.04 |
| Total C | 0.42 | 0.65* | −0.08 |
| Total N | 0.37 | 0.65* | −0.03 |
| C:N | 0.09 | 0.36 | −0.05 |
| Moisture | −0.07 | −0.06 | 0.27 |
| pH | −0.06 | 0.14 | −0.04 |
| Max temp | −0.33 | −0.47* | 0.07 |
| Min temp | −0.17 | −0.17 | −0.02 |
| Avg temp | −0.45* | −0.45* | 0.08 |
| Nitrification potential | – | 0.51* | −0.01 |
| Denitrification potential | 0.51* | – | 0.1 |
Moisture, gravimetric water content; max temp, maximum soil temperature at 7.5 cm depth, min temp, minimum soil temperature, avg temp, average soil temperature. Fluxes of NH+4 and NO−3 were measured using ion-exchange resin bags. Bold values indicate significance (P < 0.05). After sequential bonferroni corrected, only P-values with * were still significant.