TABLE 8.
Effects of temperature on rates of sulfate reduction and methanogenesis using sediments from low-sulfate ponds
| Pond | Incubation temp (°C) | Mean rate (nmol · cm−3 day−1) ± SD of a:
|
Methanogenesis/ sulfate reduction | |
|---|---|---|---|---|
| Methanogenesis | Sulfate reduction | |||
| Orange | 4 | 5.59 ± 1.20 | 9.69 ± 1.36 | 0.57 |
| 0 | 5.39 ± 0.22 | 3.79 ± 0.39 | 1.42 | |
| −10 | 1.70 ± 0.34 | 0.44 ± 0.10 | 3.86 | |
| −14 | 1.79 ± 0.59 | 0.34 ± 0.08 | 5.26 | |
| −18 | 1.78 ± 0.19 | 0.070 ± 0.006 | 25.42 | |
| −21 | 1.45 ± 0.11 | 0.040 ± 0.004 | 36.25 | |
| Skua | 4 | 17.63 ± 0.62 | 16.29 ± 1.96 | 1.08 |
| 0 | 14.69 ± 0.36 | 5.36 ± 0.16 | 2.74 | |
| −10 | 1.97 ± 0.10 | 0.39 ± 0.12 | 5.05 | |
| −18 | 1.38 ± 0.49 | 0.15 ± 0.10 | 9.20 | |
| P-70 | 4 | 33.29 ± 6.31 | 17.20 ± 3.45 | 1.93 |
| 0 | 27.85 ± 3.25 | 9.58 ± 1.78 | 2.91 | |
| −10 | 3.16 ± 0.16 | 0.14 ± 1.01 | 22.57 | |
| −18 | 1.87 ± 0.34 | 0.008 ± 0.002 | 23.30 | |
a
Determined after incubation of sediments for 100 days. Values are means of triplicate determinations ± 1 SD.