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. 2018 Nov 23;9:2873. doi: 10.3389/fmicb.2018.02873

Table 2.

Hydrogen consumption rates of different ex situ measurements performed with hydrothermal fluid samples or bacterial strains isolated from hydrothermal environments.

Sample type or strain T O2 H2 addition Other incubation characteristics H2 consumption rate CO2-fixation rate Reference
Wideawake diffuse fluids, basalt-hosted, MAR 18°C + + 2% in head space 13.9 ± 1.7 – 18.9 ± 3.1 [fmol H2 cell-1 h-1] 0.1 – 0.2 [fmol CO2 cell-1 h-1] Perner et al., 2013a
– 63.7 ± 24.0 – 89.0 ± 25.9 [fmol H2 cell-1 h-1] 0.1 – 0.2 [fmol CO2 cell-1 h-1]
Clueless diffuse fluids, basalt-hosted, MAR 18°C + + 2% in head space 0.1 ± 0.08 [fmol H2 cell-1 h-1] 0.004 [fmol CO2 cell-1 h-1]
– 0.01 ± 0.004 [fmol H2 cell-1 h-1] <0.0001 [fmol CO2 cell-1 h-1]
Desperate diffuse fluids, basalt-hosted, MAR 18°C + + 2% in head space 0.2 ± 0.1 [fmol H2 cell-1 h-1] 0.0002 [fmol CO2 cell-1 h-1]
– 0.09 ± 0.02 [fmol H2 cell-1 h-1] 0.0005 [fmol CO2 cell-1 h-1]
Sisters Peak diffuse fluids, basalt-hosted, MAR 18°C + + 2% in head space 0.8 ± 0.05 [fmol H2 cell-1 h-1] <0.001 [fmol CO2 cell-1 h-1]
– 49.3 ± 6.1 [fmol H2 cell-1 h-1] 0.2 ± 0.1 [fmol CO2 cell-1 h-1]
Foggy Corner diffuse fluids, basalt-hosted, MAR 18°C + + 2% in head space 82.0 ± 10.0 [fmol H2 cell-1 h-1] 0.003 ± 0.001 [fmol CO2 cell-1 h-1]
– 92.0 ± 11.0 [fmol H2 cell-1 h-1] 0.006 ± 0.001 [fmol CO2 cell-1 h-1]
Lilliput diffuse fluids, basalt-hosted, MAR 18°C + + 2% in head space 0.3 ± 0.06 [fmol H2 cell-1 h-1] 0.01 [fmol CO2 cell-1 h-1]
– 0.3 ± 0.004 [fmol H2 cell-1 h-1] 0.01 [fmol CO2 cell-1 h-1]
Quest diffuse fluids, ultramafic-hosted, MAR 18°C + + 2% in head space <0.002 [fmol H2 cell-1 h-1] 0.002 ± 0.001 [fmol CO2 cell-1 h-1]
– <0.02 [fmol H2 cell-1 h-1] 0.002 ± 0.001 [fmol CO2 cell-1 h-1]
Irina II diffuse fluids, ultramafic-hosted, MAR 18°C + + 2% in head space 17.0 ± 17.1 [fmol H2 cell-1 h-1] 0.02 [fmol CO2 cell-1 h-1]
– 1.6 ± 1.9 [fmol H2 cell-1 h-1] 0.02 [fmol CO2 cell-1 h-1]
Irina II plume, ultramafic-hosted, MAR 18°C + + 2% in head space 50.5 ± 14.6 [fmol H2 cell-1 h-1] 0.001 [fmol CO2 cell-1 h-1]
– 2.6 ± 2.0 [fmol H2 cell-1 h-1] 0.001 [fmol CO2 cell-1 h-1]
Nibelungen hot fluids, ultramafic-hosted, MAR 18°C + + 2% in head space 0.2 ± 0.1 [fmol H2 cell-1 h-1] 0.003 [fmol CO2 cell-1 h-1]
– 0.7 ± 0.04 [fmol H2 cell-1 h-1] 0.003 [fmol CO2 cell-1 h-1]
Crab Spa diffuse fluids, basalt-hosted, EPR 24°C Not added 150 μM dissolved H2 25 MPa pressure 3.66 – 5.77 [fmol H2 cell-1 h-1] n.d. McNichol et al., 2016
Crab Spa diffuse fluids, basalt-hosted, EPR 24°C Not added 150 μM dissolved H2 25 MPa pressure + 100 μM nitrate 14.65 – 21.18 [fmol H2 cell-1 h-1] n.d.
Crab Spa diffuse fluids, basalt-hosted, EPR 50°C Not added 150 μM dissolved H2 25 MPa pressure + 100 μM nitrate 41.24 – 63.97 [fmol H2 cell-1 h-1] n.d.
Symbiont-hosting Bathimodiolus tissue from ultramafic Logatchev field, MAR 4°C + 100 ppm in head space 656 ± 207 [nmol H2 h-1 (g wet weight)-1] ∼ 67 [14C Bq (g wet weight)-1] Petersen et al., 2011
Symbiont-hosting Bathimodiolus tissue from ultramafic Logatchev field, MAR 4°C + 100–1783 ppm in head space 656 ± 207 – 2945 ± 201 [nmol H2 h-1 (g wet weight)-1] n.d.
Symbiont-hosting Bathimodiolus tissue from basalt-hosted Comfortless Cove field, MAR 4°C + 95–938 ppm in head space 30 ± 25 – 208 ± 67 [nmol H2 h-1 (g wet weight)-1] n.d.
Symbiont-hosting Bathimodiolus tissue from basalt-hosted Lilliput field, MAR 4°C + 93–2916 ppm in head space 20 ± 9 – 316 ± 100 [nmol H2 h-1 (g wet weight)-1] n.d.
Janssand sediments, German Wadden Sea 14°C – 220 μM in head space 0.46 [fmol H2 cell-1 h-1] n.d. Dyksma et al., 2018
Hydrogenovibrio SP-41∗ 28°C + 2% in head space Different growth media were tested 1.47 – 6.1 [fmol H2 cell-1 h-1] n.d. Hansen and Perner, 2015
H. crunogenus TH-55∗ 28°C + 2% in head space 0.73 [fmol H2 cell-1 h-1] n.d.

T states the incubation temperature during the experiments and O2 indicates whether the experiments were conducted under oxic (+) or anoxic (-) conditions. For comparison, a non-hydrothermal sample (Janssand sediments) is also included. ∗Previously Thiomicrospira (crunogena).