Table 4. The values for the richness and diversity are shown.
| Gene | Period 1 (Autotrophic with NO3 −) | Period 2 (Heterotrophic with NO3 −) | Period 3 (Autotrophic with NO2 −) | ||||||||||||
| n | Sobs | SChao1 | C (%) | H’ | n | Sobs | SChao1 | C (%) | H’ | n | Sobs | SChao1 | C (%) | H’ | |
| narG | 50 | 4 | 5 | 96 | 0.84±0.19 | 57 | 6 | 6.5 | 96.5 | 1.11±0.24 | 55 | 5 | 5.5 | 96.4 | 0.67±0.28 |
| napA | 9 | 6 | 16 | 88.9 | 1.58±0.57 | 11 | 5 | 6.5 | 90.9 | 1.29±0.53 | 8 | 3 | 4 | 75 | 0.74±0.59 |
| nirS | 60 | 15 | 25.5 | 93.3 | 2.29±0.22 | 42 | 16 | 34 | 92.9 | 2.45±0.26 | 56 | 19 | 22.5 | 96.6 | 2.63±0.23 |
| nirK | 54 | 12 | 17 | 93.6 | 1.57±0.36 | 54 | 15 | 18.3 | 96.3 | 2.40±0.22 | 48 | 9 | 9.6 | 100 | 1.19±0.38 |
| nosZ | 51 | 5 | 5.5 | 98.0 | 0.57±0.30 | 54 | 5 | 8 | 96.4 | 0.48±0.28 | 37 | 4 | 7 | 97.3 | 0.37±0.32 |
The mean and SD values are calculated for H’.
n, number of sequences used; Sobs, observed richness; SChao1, expected richness; C, coverage; H′, Shannon diversity index.