February 25, 2021 — Researchers have developed a method to estimate the value of oyster and clam aquaculture to nitrogen reduction in a coastal community. Nitrogen is a nutrient that comes from many different sources, including agriculture, fertilizers, septic systems, and treated wastewater. In excess it fuels algal growth, which can affect water quality and human health.
As a result, a growing number of communities are required to follow regulations to reduce the amount of nitrogen they release. Shellfish are an option that can be a valuable part of a community’s nutrient management plan.
In a study in Environmental Science & Technology, shellfish biologists, economists, and modelers from NOAA Fisheries, NOAA National Centers for Coastal Ocean Science, and Stony Brook University used a transferable replacement cost methodology to estimate the value of oyster and clam aquaculture to nitrogen reduction in Greenwich, Connecticut.
Growing bivalve shellfish, including oysters and clams, provides direct economic benefits to a community by supporting jobs and making fresh local seafood available to consumers. It also provides ecosystem services—benefits that nature provides to people—including habitat for native species and improved water quality.