Multiple sources of aerobic methane production in aquatic ecosystems include bacterial photosynthesis.

ABSTRACT: Aquatic ecosystems are globally significant sources of the greenhouse gas methane to the atmosphere. Until recently, methane production was thought to be a strictly anaerobic process confined primarily to anoxic sediments. However, supersaturation of methane in oxygenated waters has been consistently observed in lakes and the ocean (termed the 'methane paradox'), indicating that methane can be produced under oxic conditions through unclear mechanisms. Here we show aerobic methane production from multiple sources in freshwater incubation experiments under different treatments and based on biogeochemical, metagenomic, and metatranscriptomic data. We find that aerobic methane production appears to be associated with (bacterio)chlorophyll metabolism and photosynthesis, as well as with Proteoba

SUBMITTER: Perez-Coronel E 

PROVIDER: S-EPMC9617973 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature