title: Microbial methanogenesis in subsurface oil and coal.
abstract: It is now clear that active methanogens are present in the deep-subsurface. This paper reviews microbial population structures and the biodegradation of organic compounds to methane in situ within oil reservoirs and coal deposits. It summarizes our current knowledge of methanogenes and methanogenesis, fermenters, synthrophs and microbial metabolism of complex organic compounds in these two widely occurring organic-rich subsurface environments. This review is not intended to be an exhaustive report of microbial diversity. Rather, it illustrates the similarities and differences between the two environments with specific examples, from the nature of the organic molecules to the methanogenic metabolic pathways and the structure of the microbial populations to demonstrate that widely diverging microbial populations show surprisingly similar metabolic capabilities.
authors.affiliation: Ecole Normale Supérieure de Lyon, CNRS UMR 5276, 46 Allée d'Italie, 69364 Lyon cedex 07, France.
authors.forename: Margaux
authors.initials: M
authors.lastname: Meslé
authors.forename: Gilles
authors.initials: G
authors.lastname: Dromart
authors.forename: Philippe
authors.initials: P
authors.lastname: Oger
mesh_terms: D058448:Biota; D001711:Biotransformation; D002244:Carbon / Q000378:metabolism*; D003031:Coal / Q000382:microbiology*; D004783:Environmental Microbiology; D008697:Methane / Q000378:metabolism*; D009821:Oils / Q000378:metabolism*
chemical_list: D003031:Coal; D009821:Oils; D002244:Carbon; D008697:Methane
keywords: Biogenic methane; Biotransformation; Coalbed methane; Deep-biosphere; Methanogenesis; Oil degradation