Journal
MARINE ENVIRONMENTAL RESEARCH
Volume 69, Issue 5, Pages 363-373Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2010.01.001
Keywords
Nereis diversicolor; Cadmium; Zinc; Silver; Biodynamic modelling; Sediment
Funding
- FEDER-EU [SP3.E101/03]
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Biodynamic parameters of the ragworm Nereis diversicolor from southern Spain and south England were experimentally derived to assess the inter-population variability of physiological parameters of the bioaccumulation of Ag, Cd and Zn from water and sediment Although there were some limited variations, these were not consistent with the local metal bioavailability nor with temperature changes Incorporating the biodynamic parameters into a defined biodynamic model, confirmed that sediment is the predominant source of Cd and Zn accumulated by the worms, accounting in each case for 99% of the overall accumulated metals, whereas the contribution of dissolved Ag to the total accumulated by the worm increased from about 27 to about 53% with increasing dissolved Ag concentration Standardised values of metal-specific parameters were chosen to generate a generalised model to be extended to N diversicolor populations across a wide geographical range from western Europe to North Africa According to the assumptions of this model. predicted steady state concentrations of Cd and Zn in N diversicolor were overestimated, those of Ag underestimated. but still comparable to independent field measurements We conclude that species-specific physiological metal bioaccumulation parameters are relatively constant over large geographical distances, and a single generalised biodynamic model does have potential to predict accumulated Ag, Cd and Zn concentrations in this polychaete from a single sediment metal concentration (C) 2010 Elsevier Ltd All rights reserved
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