中文摘要：

采用原子吸收法对杭州湾和海州湾内慈溪、乍浦、连云港3个彩虹明樱蛤地理群体的Cd、Cr、Pb、Ni、Cu和Zn这6种重金属的含量进行测定,并与相关标准进行比较评价。结果表明：Cd、Ni、Zn、Cu、Pb五种重金属在杭州湾的慈溪和乍浦彩虹明樱蛤体内的富积量要显著高于海州湾连云港群（P〈0.05）,而Cr则相反。这6种重金属中,海州湾与杭州湾彩虹明樱蛤体内主要的重金属污染物为Zn,为548.589～732.201μg/g;综合来看,3个群体中以连云港的污染最轻,而乍浦的污染较重;对这6种重金属的聚类分析结果表明杭州湾南北两岸彩虹明樱蛤重金属污染特性相近,欧氏距离最小89.79,而与海州湾连云港彩虹明樱蛤重金属污染特性区别较大,欧氏距离分别高达139.19和204.56,这一结果与地理距离一致。

英文摘要：

Abstract： In this paper, the concentrations of Cd, Cr, Pb, Ni, Cu and Zn in the full dry soft part of the adult clam MoereUa iridescens from three geographical populations, Lianyungang population from Hangzhou bay, Zhapu and Cixi population from Haizhou bay were determined by atomic absorption spectrometer. The results indicated that the concentrations of Cd, Cr, Pb, Ni and Cu in the clam from Cixi and Zhapu were significant higher than that in Lianyungang, but a reversed trend was found for Cr. The major contaminant for the three populations M. iridescens was Zn among the six heavy metals and the concentration amounted to 548.589 -- 732.201 ~a g/g. Overall the heavy metal contamination for M. iridescen was better in Lianyungang population while it was worse in Zhapu population. The results of cluster analysis based on the six heavy metals indicated that the contamination character was similar between Cixi and Zhapu （Euclidean distance 89.79）, but that was quite different from Lianyungang （Euclidean distance 139.19 and 204.56 respectively）. Therefore, the cluster results based heavy metals was consistent with geographical distance among the three populations of M. iridescens.