Journal
HELGOLAND MARINE RESEARCH
Volume 65, Issue 1, Pages 51-58Publisher
SPRINGER
DOI: 10.1007/s10152-010-0200-9
Keywords
Macrozoobenthos; Intertidal; Historical richness; Human impact; Dutch Wadden Sea
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The benthic fauna of two areas in the western Dutch Wadden Sea, Posthuiswad and Staart van Schieringhals, was described in 1930-1960 and again between 1996 and 2005. Here, we document the changes. Whereas both areas formerly had high densities of species that biogenically structured the intertidal mudflats such as mussels Mytilus edulis and cockles Cerastoderma edule, by 1996 they had shown a tenfold decrease in the densities of molluscs, with no recovery till 2005. Although the number of species of polychaetes and crustaceans may not have changed much, their relative abundance did. Nowadays, more polychaete species are common than before. We briefly discuss whether the changes in benthic community composition could be due to industrial fishery practices or eutrophication effects.
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