Hydrocarbon seeps, deep sea extreme environments where deeply sourced fluids
discharge at the seabed, occur along continental margins across the globe. Energy-rich …

Abstract Deep marine sediments (> 1mbsf) harbor~ 26% of microbial biomass and are the
largest reservoir of methane on Earth. Yet, the deep subsurface biosphere and controls on …

Marine sediments are important methane reservoirs. Methane efflux from the seabed is
significantly restricted by anaerobic methanotrophic (ANME) archaea through a process …

Cold seeps and hydrothermal vents are seafloor habitats fueled by subsurface energy
sources. Both habitat types coexist in Guaymas Basin in the Gulf of California, providing an …

Gas hydrates deposited in subseafloor sediments are considered to primarily consist of
biogenic methane. However, little evidence for the occurrence of living methanogens in …

Abstract The Guaymas Basin spreading center, at 2000 m depth in the Gulf of California, is
overlain by a thick sedimentary cover. Across the basin, localized temperature anomalies …

Marine surface sediments, which are replete with sulfate, are typically considered to be
devoid of endogenous methanogenesis. Yet, methanogenic archaea are present in those …

Cold seeps are globally widespread seafloor ecosystems that feature abundant methane
production and flourishing chemotrophic benthic communities. Chemical evidence indicates …

Although coastal sediments are major contributors to the production of atmospheric
methane, the effects of environmental conditions on methanogenesis and the community of …

Methane seeps are widespread seafloor ecosystems shaped by complex physicochemical-
biological interactions over geological timescales, and seep microbiomes play a vital role in …