Now an empty mudflat:Past and present benthic abundances in the western Dutch Wadden Sea

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 m...

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Bibliographic Details
Published in:Helgoland Marine Research
Main Authors: Kraan, Casper, Dekinga, Anne, Piersma, Theunis
Format: Article in Journal/Newspaper
Language:English
Published: 2011
Subjects:
Macrozoobenthos
Intertidal
Historical richness
Human impact
Dutch Wadden Sea
LONG-TERM CHANGES
KNOTS CALIDRIS-CANUTUS
INTERTIDAL FLATS
BIOMASS
AREA
ECOSYSTEMS
FOOD
EUTROPHICATION
PHYTOPLANKTON
Calidris canutus
Online Access:https://hdl.handle.net/11370/766ef58b-3fa6-4150-919d-1f86c05f606c
https://research.rug.nl/en/publications/766ef58b-3fa6-4150-919d-1f86c05f606c
https://doi.org/10.1007/s10152-010-0200-9
Description
Summary: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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