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首页> 美国政府科技报告 >Relationship Between Copper Speciation and Toxicity for Larvae of the Blue Mussel Mytilus edulis: Regulatory Implications and Determination of Water Effect Ratios
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Relationship Between Copper Speciation and Toxicity for Larvae of the Blue Mussel Mytilus edulis: Regulatory Implications and Determination of Water Effect Ratios

机译：蓝贻贝幼虫铜形态与毒性的关系：调节意义及水效比的测定

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Copper toxicity to larvae of the blue mussel Mytilus edulis was quantified in chemically defined media to determine the relationship between concentrations of the free aquo Cu2+ ion and toxicity. The objective was to generate robust relationships to predict the effects of water chemistry on the toxic effects of copper and assess their ecological and regulatory implications. We found a robust relationship exists, suggesting that this species, a key organism in the regulatory enforcement community, is affected primarily by free Cu ions. This validates current assumptions behind the adoption of site-specific criteria derived from testing. However, the concentrations of free Cu ions required to observe chronic toxic effects (10- 9M) are much higher than found in most harbors. Titration data in the literature suggest that dissolved concentrations of Cu in US harbors would have to be much higher before the survival of this organism was threatened. This is significant because an exhaustive study of Cu toxicity to invertebrates carried out in the 1970s found that Mytilus larvae were among the most sensitive species. It seems likely that concerns about Cu toxicity to marine planktonic invertebrates may be overstated. Caution must be exercised when extending these conclusions to benthic organisms, to which more refractory forms of Cu are probably bioavailable.

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