The impact of oyster aquaculture on the estuarine carbonate system

Many studies have examined the vulnerability of calcifying organisms, such as eastern oyster (Crassostrea virginica), to externally forced ocean acidification, but opposite interaction whereby oysters alter their local carbonate conditions has received far less attention. We present an exploratory model for isolating impact that net calcification and respiration aquacultured can on calcite aragonite saturation states, in context varying temperature, ocean-estuary mixing, air-sea gas exchange. apply Damariscotta River Estuary Maine which experienced rapid expansion aquaculture last decade. Our uses shell growth over summer season a previously derived relationship between quantify impacts gross metabolism states open tidal waters. Under 2018 industry size climate conditions, we estimate lower by up 5% (i.e., 0.17 0.11 units respectively) per day late summer, with average 3% growing season. Perturbations from temperature exchange are similar magnitude. 2050 size, state will decrease additional 0.54 units. If expands 3-fold 2050, may 0.73 0.47 units, respectively, latter half when compared size. Collectively, our results indicate dense aggregations significant role estuarine chemistry.