Table 6.
Relative abundance and diversity of nitrate metabolism genes. Phylotypes are defined as unique taxon IDs assigned by BLAST to nr.
| Microcosm/protein | Total phylotypes | Unamended | +O2-NO3- | +O2+NO3- | -O2-NO3- | -O2+NO3- |
|---|---|---|---|---|---|---|
| Nitrate reductase | 239 | 975a (0.37%)b 162c | 697 (0.44%) 116 | 259 (0.57%) 59 | 51 (0.24%) 33 | 541 (0.29%) 135 |
| Nitrite reductase | 207 | 454 (0.17%) 128 | 448 (0.28%) 94 | 167 (0.37%) 45 | 29 (0.13%) 24 | 225 (0.12%) 98 |
| Nitric oxide reductase | 118 | 200 (0.08%) 59 | 235 (0.15%) 49 | 135 (0.30%) 31 | 19 (0.09%) 18 | 121 (0.07%) 57 |
| Nitrous oxide reductase | 52 | 102 (0.04%) 32 | 75 (0.05%) 28 | 12 (0.026%) 6 | 15 (0.07%) 8 | 83 (0.05%) 25 |
| Nitrogenase | 66 | 172 (0.07%) 39 | 353 (0.22%) 30 | 123 (0.27%) 17 | 6 (0.03%) 4 | 45 (0.02%) 19 |
Notes.
a
Total number of genes annotated.
b
Percent of total annotated enzymes.
c
Number of phylotypes.