Fig. 6From: Radical changes in the Wadden Sea fauna and flora over the last 2,000 yearsAnnual landings of European oysters (in millions) (a) in the east Frisian Wadden Sea 1770–1830; and (b) in the north Frisian Wadden Sea 1868–1930; and (c) landings of cultured Pacific oysters in the Netherlands 1970–2000. Data adapted from Hagmeier and Kaendler (1927), Neudecker (1990) and Drinkwaard (1999)Back to article page