Table 1.
Distribution of ammonia-oxidizers in different ecosystems.
| Country | Ecosystem | AOA | AOB | comammox Nitrospira clade A | comammox Nitrospira clade B | References |
|---|---|---|---|---|---|---|
| America | Recirculating aquaculture systems | 0.94 × 108-3.4 × 108 (copies/g) | 2.6 × 103-5.0 × 105 (copies/g) | 1.6 × 108-4.2 × 108 (copies/g) | – | Bartelme et al., 2017 |
| Denmark | Drinking water | 1.2 × 103−3.4 × 103 (copies/m3) | 1.6 × 107-10.0 × 107 (copies/m3) | 0.82 × 108-2.58 × 108 (copies/m3) | – | Tatari et al., 2017 |
| Austria | Waste water treatment plant | – | 1.3 × 103-2.1 × 103 (copies/ng DNA) | 3.4 × 102-6.8 × 102 (copies/ng DNA) | – | Pjevac et al., 2017 |
| China | Overlying water in river | 3.34 × 103-2.18 × 107 (copies/L) | 1.06 × 105-2.98 × 107 (copies/L) | 1.25 × 104 (copies/L) | – | Zhang et al., 2019 |
| China | Agriculture soil | – | – | 4.14 × 104-1.65 × 107 (copies/g) | 9.44 × 102-2.12 × 106 (copies/g) | Xu et al., 2020 |
| Italy | Rice paddy soil | 2.1 × 103-3.1 × 103 (copies/ng DNA) | – | 3.6 × 102-4.6 × 102 (copies/ng DNA) | 3.5 × 102-4.5 × 102 (copies/ng DNA) | Pjevac et al., 2017 |
| Italy | Forest soil | 1.4 × 102-2.6 × 102 (copies/ng DNA) | 1.7 × 103-3.5 × 103 (copies/ng DNA) | – | 2.9 × 102-4.9 × 102 (copies/ng DNA) | Pjevac et al., 2017 |
| China | River sediment | 1.84 × 102-3 × 102 (copies/ng DNA) | 9.3 × 101-3.4 × 103 (copies/ng DNA) | 1.8 × 102-2.8 × 102 (copies/ng DNA) | – | Zhao et al., 2019 |
| China | Intertidal sediment | 1.7 × 102-4.9 × 103 (copies/ng DNA) | 2.2 × 102-5.4 × 103 (copies/ng DNA) | 1.6 × 102-3.2 × 102 (copies/ng DNA) | – | Zhao et al., 2019 |
| China | Estuary tidal wetland sediment | 1.15 × 10 6 -1.66 × 10 7 (copies/g) or 5.71 × 10 1 -6.27 × 10 3 (copies/ng DNA) | 1.76 × 10 5 -1.73 × 10 7 (copies/g) or 1.05 × 10 1 -1.57 × 10 3 (copies/ng DNA) | 4.15 × 10 5 -6.67 × 10 6 (copies/g) or 2.74 × 10 1 -7.02 × 10 2 (copies/ng DNA) | 6.28 × 10 5 -4.01 × 10 6 (copies/g) or 1.1 × 10 2 -2.65 × 10 2 (copies/ng DNA) | This study |