Table 3. Correlations (r) between ammonia oxidation rates and Thaumarchaeota gene or transcript abundance, measured in Antarctic coastal waters.
| Sample subset | n | rrs genes | amoA genes | amoA transcripts | Ratio of amoA mRNA:DNA |
|---|---|---|---|---|---|
| All winter | 18 | +0.25 | −0.009 | +0.41 | +0.40 |
| UAASW | 6 | +0.24 | −0.30 | −0.38 | +0.30 |
| LAASW | 6 | +0.099 | −0.14 | +0.082 | +0.17 |
| CDW | 6 | −0.15 | +0.21 | +0.56 | +0.44 |
| All summer | 47 | +0.45*** | +0.36* | +0.025 | −0.16 |
| WW | 25 | +0.52** | +0.57** | +0.33 | −0.13 |
| CDW | 22 | +0.33 | +0.23 | −0.11 | −0.21 |
Abbreviations: CDW, circumpolar deep water; LAASW, lower Antarctic surface water; UAASW, upper Antarctic surface water; WW, winter water.
Statistically significant correlations are indicated as follows: ***P<0.001, **P<0.01 and *P<0.05.