Comparison of contaminant accumulation in three species of marine invertebrates with different feeding habits
Comparison of contaminant accumulation in three species of marine invertebrates with different feeding habits
复制标题
DOI：
10.1002/etc.5620160501
复制
发表时间：
1997-05-01
影响因子：
4.1
通讯作者：
vanStraalen, NM
中科院分区：
文献类型：
--
作者：
Kaag, NHBM;Foekema, EM;vanStraalen, NM
为了评估摄食方式对沉积物中污染物生物累积的重要性，将具有不同摄食习性的三种海洋底栖无脊椎动物暴露于室外环境中受污染的沉积物。在暴露 60 至 140 天后，对几种多氯联苯和多环芳烃进行了残留物分析。结果表明，沉积物摄入是以沉积物为食的沙蚕（Arenicola marina）和兼性以沉积物为食的波罗的海沙虫（Macoma balthica）的主要吸收途径。滤食性贻贝（贻贝）中的残留物似乎与沉积物中的污染物浓度无关。沉积物和滤食性双壳类之间的差异在涉及波罗的海泰林的实验中得到了证实，即上覆水中的食物供应量存在差异。使用简单的线性回归模型来描述以沉积物为食的无脊椎动物中的污染物浓度作为沉积物中浓度的函数。通过减去滤食性动物中的浓度来对水中的积累进行校正。结论是，仅化学平衡分配不足以评估污染沉积物对食沉积物无脊椎动物的风险，但还应考虑食性。
In order to assess the importance of the mode of feeding for the bioaccumulation of contaminants from sediments, three marine benthic invertebrates, with different feeding habits, were exposed to contaminated sediments in outdoor mesocosms. Residue analyses were carried out for several polychlorinated biphenyls and polycyclic aromatic hydrocarbons after exposure periods of 60 to 140 days. It was shown that sediment ingestion is a major uptake route for the sediment-feeding lugworm, Arenicola marina, and for the facultative deposit-feeding baltic tellin, Macoma balthica. Residues in the filter-feeding mussel, Mytilus edulis, appeared to be independent of contaminant concentrations in the sediment. The difference between deposit and filter-feeding bivalves was confirmed in experiments involving the baltic tellin, with differences in the food availability in the overlying water. A simple linear regression model was used to describe contaminant concentrations in sediment-feeding invertebrates as a function of concentrations in sediment. A correction for the accumulation from water was made by subtracting the concentrations in filter feeders. It was concluded that chemical equilibrium partitioning alone is not sufficient for the assessment of the risks of contaminated sediments to sediment-feeding invertebrates, but that feeding habits should also be considered.