The supply and processing of organic and inorganic carbon, nutrients, and oxygen at the seafloor is incredibly important to understanding the ultimate fate of sinking organic matter in the oceans, the seasonal cycle of oxygen, pH, and DIC in coastal systems, and the food availability and habitat quality of benthic animals. Observations of sediment and porewater composition, of rates of biogeochemical processes and of benthic fluxes exist but are often spatially or temporally disconnected and not linked to ecosystem functioning and biological processes. Models are a tool to bridge these data coverage gaps, but often don’t incorporate process-level dynamics and links with biological activity. This disconnect clearly leads to difficulties synthesizing within and across systems. This session will address benthic biogeochemical processes and biological-geochemical interactions at a range of spatiotemporal scales, from the coastal zone to the deep-sea. We encourage emerging topics including ocean acidification/deoxygenation and their impacts on sediment biogeochemistry, influence of extreme events, and anthropogenic impact on the seafloor. Of particular interest are submissions focused on biogeochemical and ecosystem interactions, coupled data-model approaches, time series observations and trends, and comparisons of processes across a range of environments.

• Coastal and Estuarine Biology and Biogeochemistry -
• Deep Sea Exploration -
• Physical-Biological Interactions -