Table 2 Comparison of methane oxidation rates.

From: Carbonate-hosted methanotrophy represents an unrecognized methane sink in the deep sea

Study

Sample

Methane oxidation rate; nmol CH 4  cm −3 per day

This study

Oxic

Active sediment A.Sed-5128

64.1 (11.3)

 

Low-activity sediment L.Sed-5043

4.7 (0.5)

 

Active porous carbonate A.Carb-5305

23.5 (2.4)

 

Active massive carbonate A.Carb-5152

16.2 (2.1)

 

Low-activity massive carbonate L.Carb-5028

6.8 (0.6)

Anoxic

Active sediment A.Sed-5128

193.6 (20.4)

 

Low-activity sediment L.Sed-5043

7.5 (1.8)

 

Active porous carbonate A.Carb-5305

80.9 (9.2)

 

Active massive carbonate A.Carb-5152

52.5 (8.0)

 

Low-activity massive carbonate L.Carb-5028

11.8 (2.0)

Treude et al.43

Hydrate Ridge active seep sediment

32–2,358

Wegener et al.42

North Sea active seep sediment

25–450

Joye et al.70

Gulf of Mexico active seep sediment

121–501

Girguis et al.44

Monterey Bay active seep sediment

82.3

Hansen et al.45

Norsminde Fjord inner shelf sediment

14.3

Hoehler et al.10

Cape Lookout Bight inner shelf sediment

14–18

Reeburgh46

Skan Bay outer shelf sediment

4.9–9.3

  1. AOM, anaerobic oxidation of methane.
  2. Results for the ten sample types tested in this study are provided alongside several previously published rates of sulphate-coupled methane oxidation for a range of seafloor geologic environments. All cited values are maximum rate measurements for a sedimentary column under anoxic conditions, correlating with the sulphate–methane transition zone. Values from this study are derived from the experiments presented in Fig. 1; all control-subtracted rate values from the two time points (n=6 bottles) were divided by the incubation times to calculate the daily rate. These values were averaged, and s.e. values are in parentheses.