Oxic methane production from methylphosphonate in a large oligotrophic lake: limitation by substrate and organic carbon supply.

Autor:	Peoples LM; Flathead Lake Biological Station, University of Montana, Polson, Montana, USA., Dore JE; Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, Montana, USA., Bilbrey EM; Flathead Lake Biological Station, University of Montana, Polson, Montana, USA.; Department of Biological Sciences, Idaho State University, Pocatello, Idaho, USA., Vick-Majors TJ; Flathead Lake Biological Station, University of Montana, Polson, Montana, USA.; Department of Biological Sciences, Michigan Technological University, Houghton, Michigan, USA., Ranieri JR; Flathead Lake Biological Station, University of Montana, Polson, Montana, USA., Evans KA; Flathead Lake Biological Station, University of Montana, Polson, Montana, USA., Ross AM; Flathead Lake Biological Station, University of Montana, Polson, Montana, USA., Devlin SP; Flathead Lake Biological Station, University of Montana, Polson, Montana, USA., Church MJ; Flathead Lake Biological Station, University of Montana, Polson, Montana, USA.
Jazyk:	angličtina
Zdroj:	Applied and environmental microbiology [Appl Environ Microbiol] 2023 Dec 21; Vol. 89 (12), pp. e0109723. Date of Electronic Publication: 2023 Nov 30.
DOI:	10.1128/aem.01097-23
Abstrakt:	Importance: Methane is an important greenhouse gas that is typically produced under anoxic conditions. We show that methane is supersaturated in a large oligotrophic lake despite the presence of oxygen. Metagenomic sequencing indicates that diverse, widespread microorganisms may contribute to the oxic production of methane through the cleavage of methylphosphonate. We experimentally demonstrate that these organisms, especially members of the genus Acidovorax , can produce methane through this process. However, appreciable rates of methane production only occurred when both methylphosphonate and labile sources of carbon were added, indicating that this process may be limited to specific niches and may not be completely responsible for methane concentrations in Flathead Lake. This work adds to our understanding of methane dynamics by describing the organisms and the rates at which they can produce methane through an oxic pathway in a representative oligotrophic lake. Competing Interests: The authors declare no conflict of interest.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu