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首页> 外文期刊>Marine biology >The ocean quahog Arctica islandica L: a bioindicator for contaminated sediments
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The ocean quahog Arctica islandica L: a bioindicator for contaminated sediments

机译：quahog Arctica islandica L：污染沉积物的生物指标

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The use of benthic organisms as bioindicators in the aquatic environment is a suitable method for assessing the effects of contaminants in coastal waters. The accumulation of heavy metals in body tissues due to lifestyle and feeding mechanisms makes it possible to reveal contamination rates and recovery trends within polluted areas. Comparing a polluted historical dumping site in the inner Mecklenburg Bight (western Baltic Sea) with a less-contaminated reference site at the edge of the Mecklenburg Bight, representing the background contamination of the western Baltic Sea, the present study discusses the population structure and heavy metal exposure of the ocean quahog Arctica islandica L. (Mollusca, Bivalvia) and evaluates this organism as a bioindicator for contaminated sediments. The organism density was higher at the reference site in comparison to the dumping site. The absence of juvenile and adult individuals at the dumping site seems to be a sign that this ecological environment has not completely regenerated since the dumping event in the late 1950s to early 1960s. Heavy metal concentrations of copper, lead, and zinc in the soft body tissue of A. islandica were analysed using atomic absorption spectrometry (AAS). Shell measurements were carried out using laser ablation-inductively coupled plasma-mass spectrometry. Particularly the concentrations of copper and lead were significantly higher in the soft body tissue as well as in the shell from the dumping site than from the reference site. For pollutant biomonitoring research, the shells of the ocean quahog can be used as an indicator for heavy metal accumulation. They are more suitable for reflect- ing historical contamination events than the soft body tissue.
机译：在水生环境中使用底栖生物作为生物指示剂是评估沿海水域污染物影响的合适方法。由于生活方式和进食机制而导致的重金属在人体组织中的积累，有可能揭示污染区域的污染率和恢复趋势。比较了梅克伦堡内海（波罗的海西部）受污染的历史性倾倒地点与梅克伦堡湾边缘的污染较轻的参考地点（代表波罗的海西部的背景污染），本研究讨论了人口结构和沉重拟南芥Arctica islandica L.（双壳纲，Mollusca）的金属暴露，并评估了这种生物作为污染沉积物的生物指标。与倾倒地点相比，参考地点的生物密度更高。自从1950年代后期至1960年代初发生倾销事件以来，倾倒场没有少年和成年个体，这似乎表明这种生态环境尚未完全恢复。使用原子吸收光谱法（AAS）分析了岛曲霉软组织中铜，铅和锌的重金属浓度。使用激光烧蚀-电感耦合等离子体质谱法进行壳测量。尤其是，在软组织中以及从倾倒位置到外壳中的铜和铅的浓度都比从参考位置来的高。对于污染物生物监测研究，可以将海豚的贝壳用作重金属积累的指示剂。与软体组织相比，它们更适合反映历史污染事件。

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