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Anaerobic oxidation of methane with conditions of increased temperature and extra sulfate supply
Summary
This study investigated how temperature and sulfate availability influence anaerobic methane oxidation in cold seep ecosystems on the seafloor. The research is focused on deep-sea biogeochemistry and is not directly related to microplastic research.
Anaerobic oxidation of methane (AOM) coupled with sulfate reduction (SR) is an important process in cold-seep ecosystems to prevent methane emitted from the seafloor to the atmosphere.However, how the temperature and sulfate in seep habitats drive the SR-AOM process and further affect the methane cycles remains unknown.We simulated the habitat differences in sulfate and temperature using a high-pressure bioreactor system with a fed-batch mode for in vitro incubation of seep sediment.We found that SR-AOM was significantly affected by increased temperature (15°C).The AOM activity was increased by sulfate supply (+15 mM), even at a low temperature (8°C).Our findings provide a new insight into the methane budget in cold seeps.
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