Geochemical energy sources that support the subsurface biosphere

Everett Shock, Melanie E. Holland

Research output: Chapter in Book/Report/Conference proceedingChapter

61 Scopus citations


Predictions of bioavailable energy can be made through calculation of geochemical disequilibria. The geochemical model of McCollom and Shock [1997] of mid-ocean ridge black smoker systems was tested against microbiological measurements collected in these environments. This model was modified in this paper to include hydrogen oxidation, as there was evidence that hydrogen—oxidizing microorganisms inhabit black smoker environments. The sharp distinction between high tempearture, anoxic environments and low temperature, oxic environments in the model of McCollom and Shock [1997] disappeared in the new model; both reductive and oxidative metabolic strategies provided energy in low-and hightemperature environments. Future directions for model modification are explored, in light of potential subseafloor biotopes.

Original languageEnglish (US)
Title of host publicationThe Subseafloor Biosphere at Mid-Ocean Ridges, 2004
EditorsWilliam S.D. Wilcock, Edward F. Delong, Deborah S. Kelley, John A. Baross, S. Craig Cary
PublisherBlackwell Publishing Ltd
Number of pages13
ISBN (Electronic)9781118666135
ISBN (Print)9780875904092
StatePublished - 2004

Publication series

NameGeophysical Monograph Series
ISSN (Print)0065-8448
ISSN (Electronic)2328-8779

ASJC Scopus subject areas

  • Geophysics


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