Bivalve molluscs such as clams, oysters and mussels are beneficial not just as a coastal food source, but also for maintaining water clarity. As filter feeders, they help to regulate the nitrates and phosphates that can lead to nutrient pollution in the water. This pollution, a natural process that becomes aggravated by man-made contaminants, leads to excessive algal blooming and the depletion of oxygen in the water. In 2003, a massive die-off of fish in Rhode Island’s Greenwich Bay was determined by the Department of Environmental Management to be the result of storm runoff from sewage treatment plants. The role of bivalves in aquaculture can't be stressed enough, but disease and over-harvesting has negatively impacted the denitrification process. In Maryland, oyster depletion has been so dramatic that pre-colonial populations would have filtered the entirety of Chesapeake Bay in three days; in 1988, the same process would take almost a year. Historically, bivalves have served an important function in Rhode Island culture. From the Narragansett tribe's use of Quahog clams in wampum, to nineteenth century roads being paved with crushed oyster shells, the re-purposing of shellfish for human use is a rich tradition. What happens if over-harvesting leads to the annihilation of a species? What happens to our ecosystem without bivalves? Conversely, what does overabundance lead to?
Brennessel, Barbara. Good tidings: the history and ecology of shellfish farming in the Northeast. Hanover, NH: University Press of New England, 2008.
Historical look at shellfishery in New England, plus insight into modern sustainable practices.
Bricker, Suzanne B., Karen C. Rice, and Owen P. Bricker. "From Headwaters to Coast: Influence of Human Activities on Water Quality of the Potomac River Estuary." Aquatic Geochemistry 20, no. 2-3 (2014): 291-323.
A study of aquaculture in the Potomac River with a recommendation that forty percent of the river bed be used for shellfish cultivation.
Gosling, E. M. Bivalve Molluscs: Biology, Ecology, and Culture. Oxford: Fishing News Books, 2003.
A look at marine bivalves as a keystone species, examining their ecosystem and important role as a barometer of water quality and health.
Lyerly, C.M., A.L. Hernández Cordero, K.L. Foreman, S.W. Phillips, W.C. Dennison (eds.). 2014. New Insights: Science-based evidence of water quality improvements, challenges, and opportunities in the Chesapeake. College Park: Ian Press. http://www.ian.umces.edu.
An examination of water quality in the Chesapeake Bay and preventative measures in reducing pollution.
Rice, Michael A. "A brief history of oyster aquaculture in Rhode Island" Aquaculture in Rhode Island: 2006 Yearly Status Report. Rhode Island Coastal Resources Management Council, Stedman Government Center, Wakefield, RI.
A history of shellfishery in Rhode Island—dating from colonial times to early 2000s—with a focus on regulatory practice.