Table 2. Summary of temperature gradient experiments based on data from Figure 2.
| Study sites |
Sulfate reduction |
Sulfate reduction rates (nmol cm−3
day−1) |
Ea (kJ mol−1) | Q10a | ||||
|---|---|---|---|---|---|---|---|---|
| Topt (°C) | Tcrit (°C) | At 0 °C | At Topt | 0 °C vs Topt (%)b | Range of linearity (°C)c | |||
| Southern Ocean (Weddell Sea) | 21.3 | N/A | 0.1 | 0.5 | 20 | 0, +21 | 51.2±8.0 | 2.1 |
| Arctic Ocean (Ymerbukta, Svalbard) | 24.9 | N/A | 232 | 2233 | 10 | 0, +25 | 54.9±6.9 | 2.2 |
| Arctic Ocean (Smeerenburgfjord, Svalbard) | 26.4 | N/A | 15 | 161 | 9 | 0, +26 | 64.5±1.7 | 2.4 |
| North Sea (Wadden Sea, German Bight) | 34.8 | N/A | 12 | 518 | 2 | +4, +35 | 63.7±3.2 | 2.3 |
| Baltic Sea (Arkona Basin) | 34.8 | N/A | 13 | 236 | 5 | 0, +35 | 67.0±3.9 | 2.4 |
| Arabian Sea (off the coast of Goa, India) | 38.3 | 11 | 1 | 55 | 2 | +11, +38 | 55.7±5.7 | 2.0 |
| Arabian Sea (Sadeyat island, United Arab Emirates) | 40 | 18 | 0.02 | 21 | 0.1 | +18, +40 | 97.4±11.9 | 3.4 |
| Andaman Sea (Phuket Island, Thailand) | 41.8 | 13 | 5 | 316 | 2 | +13, +42 | 44.6±4.8 | 1.7 |
| South China Sea (Hainan Island, China) | 43.7 | 8 | 1 | 25 | 3 | +6, +44 | 36.0±5.0 | 1.6 |
Abbreviations: SRR, sulfate reduction rates; Tcrit, critical temperature; Topt, optimal temperature.
a
The temperature interval for the calculation of Q10 is +20 °C to +30 °C.
b
Percentage of SRR at 0 °C of maximum SRR at Topt.
c
The term 'Range of linearity' refers to the linear part of the Arrhenius plot.