Methylotrophic methanogenesis is often proposed to be responsible for methane production in sulfate‐rich environments, yet the magnitude of this process remains elusive. In this study, we incubated sediment from Aarhus Bay (Denmark) with 13 C labeled CH 4 to measure total methane turnover by isotope dilution, and with 14 C‐radiotracers to measure specifically the gross hydrogenotrophic and acetoclastic methane production. High...

As surface temperatures are expected to rise in the future, ice‐rich permafrost may thaw, altering soil topography and hydrology and creating a mosaic of wet and dry soil surfaces in the Arctic. Arctic wetlands are large sources of CH 4 , and investigating effects of soil hydrology on CH 4 fluxes is of great importance for predicting ecosystem feedback in response to climate change. In this study, we investigate how a decade‐l...