Hediste diversicolor

Lugworm, Arenicola marina-, held on copper-contaminated sediments 182-204 mg Cu/kg DW sediment 1113 mg Cu/kg DW sediment Ragworm, Hediste diversicolor 5, 10, or 20 pg/L at four salinities and three temperatures 1-day-old larvae... 

Scaps, P. 2002. A review of the biology, ecology and potential use of the common ragworm Hediste diversicolor (O.F. Muller) (Annelida Polychaeta). Hydrobiologia 470 203-218. 

The most common and most frequent species are the bivalves Macoma balthica and Mytilus edulis, the cumacean Diastylis rathkei, and the polychaete Scoloplos armiger. In addition to those, 20 other species have more than one thousand entries in the data base. For the inner coastal waters some genuine brackish water species like Marenzelleria neglecta and Hediste diversicolor and some freshwater species like Theodoxusfluviatilis or Radix balthica belong to the most common benthic representatives. 

The sponge accumulated copper in direct proportion to the concentration of the dissolved metal in the surroundings. Final body copper concentrations were 236 and 818 mg kg (dry weight) at exposure concentrations of 300 and 1000 tg dissolved Cu L respectively. There was no significant loss of copper during an 8-day depuration period. In the marine mussel Mytilus edulis, the presence of cadmium reduces the copper accumulation factor by 50% (Elliot et al. 1985). The accumulation of copper in gUl tissue of shore crabs Carcinus maenus) positively correlated with salinity. Increasing salinity reduces the accumulation of copper in ragworms (Hediste diversicolor), whereas the temperature enhances copper accumulation (Ozoh 1994). 

Ozoh, P.T.E. 1992a. The effects of salinity, temperature and sediment on the toxicity of copper to juvenile Hediste (Nereis) diversicolor (O.F. Muller). Environ. Monitor. Assess. 21 1-10. 

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