Sediment quality guidelines (SQGs) assess the ability of bottom sediment to sustain healthy infauna and water quality guidelines (WQGs) provide protection for a designated percentage of aquatic species. Filter-feeding marine species, e.g. oysters and mussels, acquire food from particles in the water column and protection of these animals is not provided by SQGs or WQGs. The current work investigated the relationship between metal (Cu, Zn) concentrations in total and fine-fraction (<62.5m) surficial sediment digested in a range of acids and chelating agents and oyster tissue metal concentrations. A strong correlation between oyster tissue Cu and Zn concentrations and fine-fraction surficial sediment digested in 1M HCl provided a sedimentary guideline which predicted tissue metal concentrations in oysters and established a level (<45gg1 and <1000gg1, respectively) for protecting oysters from exceeding human consumption levels (70gg1 and 1000gg1, respectively).
Environmental Pollution – Elsevier
Published: Jan 1, 2011
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