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Er.. Helicobacter pylori says that it
- Requires oxygen, and
- uses hydrogen methanogeneis as an energy source.
Isn't this a counterexample to the claim that oxygen kills all known methanogens?
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.
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)Reply
Or not. —Preceding unsigned comment added by 140.160.40.149 (talk) 23:52, 19 November 2007 (UTC)Reply
- 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)Reply
- "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)Reply
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)Reply