Nitrogen (N) pollution in groundwater in coastal watersheds can have negative impacts on the health of estuaries. West Falmouth Harbor, a shallow lagoon on Cape Cod, MA, USA, has experienced a marked increase in N load since the 1990s due to input from a groundwater aquifer contaminated by a municipal wastewater treatment facility. As part of a broader, long-term research effort to understand the changes to the ecosystem assoc...

Based on noninvasive eddy correlation measurements at a marine and a freshwater site, this study documents the control that current flow and light have on sediment‐water oxygen fluxes in permeable sediments. The marine sediment was exposed to tidal‐driven current and light, and the oxygen flux varied from night to day between −29 and 78 mmol m −2 d −1 . A fitting model, assuming a linear increase in oxygen respiration with cur...