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Table 2 Affinities for different catabolic reactions in kJ and normalized affinities in J per e- and Kg Vent-fluid at the Southern Area (TWP)

From: Geochemically induced shifts in catabolic energy yields explain past ecological changes of diffuse vents in the East Pacific Rise 9°50'N area

Southern Area 5 Hydrogenotrophic sulfate reduction 6 Hydrogenotrophic methanogenesis 7 Anaerobe oxidation of methane
  Measured Predicted Measured Predicted Measured Predicted
  kJ kJ kJ
February-March 1992 128.6 156.7 94.1 128.0 34.5 28.7
October 1994 129.3 165.1 93.4 135.3 35.9 29.8
November 1995 104.3 161.2 70.1 130.8 34.2 30.4
November 1997 103.9 151.1 73.8 122.5 30.1 28.7
April 2000 88.4 130.4 63.9 105.7 24.7 24.5
  J per e- and Kg vent fluid J per e- and Kg vent fluid J per e- and Kg vent fluid
February-March 1992 1.34 30.28 0.98 24.73 9.07 0.73
October 1994 0.64 41.50 0.46 34.01 1.64 0.41
November 1995 0.05 23.57 0.03 19.13 1.27 0.38
November 1997 0.08 16.34 0.06 13.24 0.58 0.42
April 2000 0.09 10.95 0.06 8.88 0.31 0.33