Methanogens are microorganisms which produce methane as a metabolic byproduct in anoxic conditions. They are archaea, a different domain from bacteria. They are common in wetlands, where they are responsible for marsh gas.
In marine sediments methane is produced when sulfates are depleted, below the top layers. Moreover, the methanogenic archaea populations play an indispensable role in anaerobic wastewater treatments. Others are extremophiles, found in environments such as hot springs and submarine hydrothermal vents as well as in the "solid" rock of the Earth's crust, kilometers below the surface.
References[change | change source]
- Joseph W. Lengeler (1999). Biology of the Prokaryotes. Stuttgart: Thieme. p. 796. ISBN 0-632-05357-7.
- J.K. Kristjansson, et al (1982). "Different Ks values for hydrogen of methanogenic bacteria and sulfate-reducing bacteria: an explanation for the apparent inhibition of methanogenesis by sulfate". Arch. Microbiol. 131 (3): 278–282. doi:10.1007/BF00405893.
- Tabatabaei, Meisam et al 2010. Importance of the methanogenic archaea populations in anaerobic wastewater treatments. Process Biochemistry 45(8), 1214-1225