Marine dissolved organic matter (DOM) contains more carbon than the combined stocks of
Earth's biota. Organisms in the ocean continuously release a myriad of molecules that …

The seabed plays a key role in the marine carbon cycle as a) the terminal location of aerobic
oxidation of organic matter, b) the greatest anaerobic bioreactor, and c) the greatest …

Climate change is driving a fundamental reorganization of the coastal zone, in which carbon-
rich ecosystems are simultaneously migrating, accreting and submerging. In this Review, we …

Subtidal marine sediments are one of the planet's primary carbon stores and strongly
influence the oceanic sink for atmospheric CO2. By far the most widespread human activity …

Large amounts of methane, a potent greenhouse gas, are produced in anoxic sediments by
methanogenic archaea. Nonetheless, over 90% of the produced methane is oxidized via …

The ubiquitous presence of microplastics in aquatic sediment represents an anthropogenic
stressor on benthic organisms and elemental cycling. However, a comprehensive …

Organic matter constitutes a key reservoir in global elemental cycles. However, our
understanding of the dynamics of organic matter and its accumulation remains incomplete …

The sequestration of organic carbon (OC) in wetland sediments is influenced by the
presence of oxygen or lack thereof. The mechanisms of OC sequestration under redox …

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 …

Burial of organic material in marine sediments represents a dominant natural mechanism of
long-term carbon sequestration globally, but critical aspects of this carbon sink remain …