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England | Work begins on marine sanctuary designed to replenish native oysters

Scientists have started the first phase of a conservation project to return native oysters (Ostrea edulis) to the Thames estuary in Essex, England.

Having suffered a 95 percent decline in population in the last 200 years due to historic overfishing, the oysters’ recovery has been hindered by habitat loss, pollution, and diseases. With natural replenishment of the native grounds so limited, it was determined that human intervention was their only hope. 

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