Learn why oysters are important to the Chesapeake Bay, the history and current state of oyster populations, and what's being done to restore oyster reefs to the Bay. February 15, β With Chesapeake Bay oyster recovery at a crucial point, building on current momentum will increase resiliency to climate change in the region while creating multiple benefits for people and the environment, according to a new report released today by the Chesapeake Bay Foundation.
Read Press Release. Eastern oysters, Crassostrea virginica , are a critical component of the Chesapeake Bay ecosystem, known as a keystone species. With their clean, hard surfaces and intricate three-dimensional structure, large oyster reefs attract a wide variety of life. They provide food, cover, and habitat for hundreds of small and juvenile fish, crabs, shrimp, and other species, which in turn provide prey for larger fish and crabs.
These shellfish are also prolific filter feeders. They remove light-blocking algae from Bay waters and help remove excess nutrients like nitrogen and phosphorus. And healthy reefs are home to other filter feeders, as well, including barnacles, encrusting bryozoans, sea anemones, and hooked mussels. Without oysters, the quality of the Bay ecosystem suffers.
Without their filtration clearing the water for light to penetrate, bay grasses can struggle to grow. Without healthy grass beds and reef habitat that provide refuge from predators and ample prey to feed on, juvenile fish and crabs may not survive to adulthood.
In other words, more oysters equal better water quality, more fish and crabs, and healthier underwater grass beds. A thriving population affects humans, too. Without it, the Bay's traditional seafood industry will continue to struggle.
