Hydrogen-independent CO₂ reduction dominates methanogenesis in five temperate lakes that differ in trophic states.

ABSTRACT: Emissions of microbially produced methane (CH₄) from lake sediments are a major source of this potent greenhouse gas to the atmosphere. The rates of CH₄ production and emission are believed to be influenced by electron acceptor distributions and organic carbon contents, which in turn are affected by anthropogenic inputs of nutrients leading to eutrophication. Here, we investigate how eutrophication influences the abundance and community structure of CH₄ producing Archaea and methanogenesis pathways across time-resolved sedimentary records of five Swiss lakes with well-characterized trophic histories. Despite higher CH₄ concentrations which suggest higher methanogenic activity in sediments of eutrophic lakes, abundances of methanogens were

SUBMITTER: Meier D 

PROVIDER: S-EPMC11235125 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature