The Okinawa Trough (OT), a typical back-arc basin in the western Pacific, preserves continuous sedimentary records since the Quaternary, making it a critical area for investigating sea-level changes, source-to-sink processes, and paleoclimate evolution. However, the controlling mechanisms of terrestrial input to the trough since the Last Glacial Maximum (LGM) remain insufficiently understood. This study conducted major element...

Methylotrophic methanogenesis has recently been recognized as a key process driving cryptic methane cycling within sulfate‐reducing sediments. Here we conducted biogeochemical analyses of methanogenic substrates, activity, and communities in two sediment cores (4–5 m) from the East China Sea, to constrain the dynamics and controls of methylotrophic methanogenesis in coastal sediments. We detected micromolar concentrations of m...