Is the CH4, H2 and CO venting from submarine hydrothermal systems produced by thermophilic bacteria?

@article{Baross1982IsTC,
  title={Is the CH4, H2 and CO venting from submarine hydrothermal systems produced by thermophilic bacteria?},
  author={J. Baross and M. Lilley and L. Gordon},
  journal={Nature},
  year={1982},
  volume={298},
  pages={366-368}
}
Submarine hydrothermal vents are a major source of methane to the oceans1,2. The methane, as well as H2 and CO, are generally believed to result from degassing of the mantle or from abiogenic water–rock reactions1, a conclusion supported by direct correlations between 3He and CH4, and generally between CH4, H2 and CO and dissolved silicate in hydrothermal waters2,3. An alternative source for these gases might be microbiological. This would imply that active bacterial communities exist in deep… Expand
CH4, H2, CO and N2O in submarine hydrothermal vent waters
Hydrothermal circulation systems of mid-ocean ridges profoundly influence the chemistry of the oceans and the oceanic crust1–3. This has been demonstrated for several major and minor constituents ofExpand
Geochemical constraints on chemolithoautotrophic metabolism by microorganisms in seafloor hydrothermal systems.
TLDR
The model indicates that mixing environments are favorable for oxidation of H2S, CH4, Fe2+ and Mn2+ only below approximately 38 degrees C, with methanogenesis and reduction of sulfate or S degrees favored at higher temperatures, suggesting that environments dominated by mixing provide habitats for mesophilic (but not thermophilic) aerobes and thermophile anaerobes. Expand
Microbial Processes at Deep Sea Hydrothermal Vents
The primary production of organic carbon by chemosynthetic sulfur-oxidizing bacteria has been proposed to provide the base of the food chain for the extensive populations of animals found atExpand
Reduced Gases and Bacteria in Hydrothermal Fluids: The Galapagos Spreading Center and 21°N East Pacific Rise
Hydrothermal fluids at the Galapagos Spreading Center (GSC) and at 21°N on the East Pacific Rise were enriched in methane, hydrogen and carbon monoxide by orders of magnitude over ambient bottomExpand
Methane anomalies in seawater above the Loihi submarine summit area, Hawaii
Hydrothermal activity above Loihi submarine volcano was characterized by water column distributions of methane, pH and helium-3. It was found that the southern Loihi summit is almost covered withExpand
Microbial activities in the emitted hydrothermal waters of the Galápagos rift vents
TLDR
The rates of bacterial metabolic activities in emitted vent water are too low for the amount of invertebrate biomass and the rate of its growth and maintenance, and the larger portion of chemosynthetic sustenance of deep sea vent ecosystems appears to be based on symbiotic associations between bacteria and invertebrates and on surface attached bacteria. Expand
Geomicrobiology of Deep-Sea Hydrothermal Vents
TLDR
Bacteria grow most abundantly in the shallow crust where upwelling hot, reducing hydrothermal fluid mixes with downwelling cold, oxygenated seawater, but the predominant production of biomass is the result of symbiotic associations between chemolithotrophic bacteria and certain invertebrates, which have also been found in Cretaceous sulfide ores of ophiolite deposits. Expand
Geochemistry of some gases in hydrothermal fluids from the southern Juan de Fuca Ridge
Five samples of hydrothermal fluids from two vent areas on the southern Juan de Fuca Ridge were analyzed for dissolved gases. Concentrations in the end-member hydrothermal fluid of H2 (270–527Expand
Dissolved methane and hydrogen in the Steinahóll hydrothermal plume, 63°N, Reykjanes Ridge
Abstract Dissolved concentrations of CH4, H2 and Mn have been measured in a hydrothermal plume above the shallow water (c. 250m) Steinahóll vent site at 63°N on the Reykjanes Ridge. Samples wereExpand
Review Lecture - The chemosynthetic support of life and the microbial diversity at deep-sea hydrothermal vents
  • H. Jannasch
  • Geology
  • Proceedings of the Royal Society of London. Series B. Biological Sciences
  • 1985
Circulation of seawater through the upper few kilometres of oceanic crust at tectonic spreading zones results in a transformation of geothermal into chemical energy. Reduced inorganic species areExpand
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