A hydrogen-based subsurface microbial community dominated by methanogens

  title={A hydrogen-based subsurface microbial community dominated by methanogens},
  author={Francis H. Chapelle and Kathleen R. O'Neill and Paul M. Bradley and Barbara A. Meth{\'e} and Stacy Ciufo and L. L. Knobel and Derek R. Lovley},
The search for extraterrestrial life may be facilitated if ecosystems can be found on Earth that exist under conditions analogous to those present on other planets or moons. It has been proposed, on the basis of geochemical and thermodynamic considerations, that geologically derived hydrogen might support subsurface microbial communities on Mars and Europa in which methanogens form the base of the ecosystem. Here we describe a unique subsurface microbial community in which hydrogen-consuming… Expand
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