Table 2.
Differences in denitrification gene abundances due to temporal, spatial, and geographic features.
| Gene | Year | Location | Site |
|---|---|---|---|
| cnorBB | 2015 > 2014 (0.020) | NS* | SMC2 > SMC3 (0.005) |
| narG | 2015 > 2014 (0.010) | floodzone > nonfloodzone (0.037) | SMC2 > SMC3 (0.012) |
| nirS | NS | nonfloodzone < others (< 0.001) | SMC2 > SMC1 > SMC3 (≤ 0.035) |
| nirK | 2015 > 2014 (< 0.0001) | NS | SMC2 > others (< 0.001) |
| nosZ1 | 2015 > 2014 (< 0.0001) | NS | SMC2 > SMC1 > SMC3 (≤ 0.039) |
| nosZ3 | NS | Nonfloodzone < others (≤ 0.047) | SMC2 > SMC1 > SMC3 (≤ 0.032) |
Tukey's post-hoc P values are shown in parentheses, where significant (P < 0.05). Only the abundances of cnorBB did not show some significant variation among months of sampling (P ≥ 0.105).
*
NS: no significant differences were observed in relation to the variable.