Mineralogical control on methylotrophic methanogenesis and implications for cryptic methane cycling in marine surface sediment.

ABSTRACT: Minerals are widely proposed to protect organic carbon from degradation and thus promote the persistence of organic carbon in soils and sediments, yet a direct link between mineral adsorption and retardation of microbial remineralisation is often presumed and a mechanistic understanding of the protective preservation hypothesis is lacking. We find that methylamines, the major substrates for cryptic methane production in marine surface sediment, are strongly adsorbed by marine sediment clays, and that this adsorption significantly reduces their concentrations in the dissolved pool (up to 40.2 ± 0.2%). Moreover, the presence of clay minerals slows methane production and reduces final methane produced (up to 24.9 ± 0.3%) by a typical methylotrophic methanogen-Methanococcoides methylutens TMA-

SUBMITTER: Xiao KQ 

PROVIDER: S-EPMC9114137 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature