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Bioavailability of metals in sediments of the Dogger Bank (Central North Sea): a mesocosm study
Langston, W.J.; Burt, G.R.; Pope, N.D. (1999). Bioavailability of metals in sediments of the Dogger Bank (Central North Sea): a mesocosm study. Est., Coast. and Shelf Sci. 48(5): 519-540
In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714, more
Peer reviewed article  

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  • Langston, W.J.
  • Burt, G.R.
  • Pope, N.D.

Abstract
    There are conflicting arguments surrounding the nature and origins of metalenrichment in sediments from the Dogger Bank (central North Sea) and muchspeculation as to its biological significance. To help resolve this controversy, amesocosm approach was evaluated to test whether metal loadings in sedimentsfrom the Dogger Bank region display enhanced bioavailability, relative to referencesites off south-west England. This involved the combination of physicochemicalcharacterization of sediments (including porewaters) with bioaccumulation studies,using sediment cores seeded with benthic organisms (bivalves Spisula solida andVenus striatula, the gastropod Turritella communis and the polychaete Melinnapalmata). There was little evidence of As, Cu, Hg or Pb bioaccumulation fromDogger cores. In contrast, all species accumulated Cd; Ag concentrations rose byup to fourfold in most bioindicators; and Ni, Cr and Mn burdens also increased,occasionally by as much as 10-fold.

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