Talk:Methanogenesis

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Er.. Helicobacter pylori says that it Isn't this a counterexample to the claim that oxygen kills all known methanogens?
 * Requires oxygen, and
 * uses hydrogen methanogeneis as an energy source.

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All methanogens are obligately anaerobic
Helicobacter pylori is not a methanogen and as such can not perform methanogenesis. As of August 2006, all methanogens known to us are members of Archaea and respire anaerobically. Further, they are all obligate methanogens; they cannot sustain growth in the absence of methane-making.

Atmospheric Methane as sign of life?
Excellent article on the whole. I have only one small addendum. Something should probably be said about interpreting atmospheric methane as a sign of life on another planet (or planemo). The argument being that methane in the atmosphere will eventually dissapate unless something is replenishing it. This something could then be the decomposition of organic matter. So if we can detect it (by using some sort of spectrometer for example) then that means there is, or was relatively recently, life there. This was of course debated when methane was discovered in the martian atmosphere by (among others) the Mars Express Orbiter (2004) and in Titan's atmosphere by the Huygens probe (2005). However, it is also argued that atmospheric methane can come from volcanoes or other fissures in the planet's crust. --Kavrod 22:28, 9 January 2007 (UTC)

Or not. —Preceding unsigned comment added by 140.160.40.149 (talk) 23:52, 19 November 2007 (UTC)


 * The article on life on Titan and probably a few others point to this article. There's no reason to point in the other direction just yet. Kortoso (talk) 00:22, 14 December 2013 (UTC)


 * "Methanogenesis and extra-terrestrial life" is not an accurate discussion. Extraterrestrial methane is very abundant, and is obviously a product of abiotic processes. Titan's methane is a special case, since in its present condition it would dissipate quickly. This needs to be clarified. Kortoso (talk) 00:30, 14 December 2013 (UTC)

Methanogenic not just an archaeans' subject
If I'm not wrong, there are also methanogenic bacteria that do the same job as achaea do. One example is the family of methanococcales than can be found, among others, in anaerobic sewage sludge digesters. Raskin L, Zheng D, Griffin ME, Stroot PG & Misra P (1995) Characterization of microbial communities in anaerobic bioreactors using molecular probes. Antoine van Leeuwenhoek 68:297-308 —Preceding unsigned comment added by 161.116.77.159 (talk) 16:14, 16 June 2008 (UTC)

Methanococcales are methanogens as well.--Jonthecheet (talk) 20:45, 16 March 2009 (UTC)


 * And they are also archaea. Kortoso (talk) 00:23, 14 December 2013 (UTC)

Productivity of Rumens with Methanogens (Cows for now)
According to |this article, the presence of methanogens decreases the productivity of the bovine rumen by taking up nutrients. It should be noted that in humans, methanogens actually help in digestion.--Jonthecheet (talk) 20:49, 16 March 2009 (UTC)

Literature report
From Scifinder: Research Topic "methanogenesis">references (7356)>refine "Review" (591)>refine "2008-" (300). Bottom line 300 reviews on methanogenesis have been published in the past 10 years. It is a big topic.--Smokefoot (talk) 14:56, 19 February 2018 (UTC)