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本文研究了有机物质输入对波罗的海和卡特加特海峡海底生态系统疏水性有机污染物(HOC)生物利用度和循环的影响。通过实验,我们研究了由于紫胎贝(Mytilus edulis)、蛇尾虫(Amphiura filiformis)及多毛目环节动物(Nereis diversicolor)所引起的微藻增加对HOC(PCB和PAH)生物积累的影响。和平衡分配理论相反,生物积累与海藻和有机碳的浓度成正比。这是由海藻有机碳中营养质量高所造成的,同时也表明是取食而不是平衡分配控制了这些物种的生物积累。通过实地研究,我们估计了紫贻贝和蛇尾虫体内每年PCB的流通总量和每年转移到更高营养级的污染物的总量。研究结果指出:①富营养化能促进底栖生物体内HOC的积累。②在评价海底系统污染时,必需考虑有机碳质量和数量在时间上的变化。③大型动物的取食活动对海底和深海结合IIOC很重要。④生物扰动促进了HOC从沉积物向水面的释放。
This paper studies the effects of organic matter inputs on the bioavailability and circulation of hydrophobic organic pollutants (HOCs) in the seabed ecosystems of the Baltic and Cartagena Strait. Through experiments, we investigated the effects of increased microalgae on the bioaccumulation of HOC (PCB and PAH) due to Mytilus edulis, Amphiura filiformis and Nereis diversicolor. In contrast to the theory of equilibrium distribution, bioaccumulation is directly proportional to the concentration of seaweed and organic carbon. This is caused by the high nutritional quality of seaweed organic carbon, which also indicates that feeding rather than balancing the distribution controls the bioaccumulation of these species. Through field studies, we estimated annual total circulation of PCBs and the total amount of pollutants transferred to higher trophic levels each year in the purple mussel and the snaketail. The results indicate that: ① eutrophication can promote the accumulation of HOC in benthic organisms. ② In assessing the pollution of the seabed system, it is necessary to consider the changes in the mass and quantity of organic carbon over time. ③ The feeding of large animals is very important for the combination of sea bottom and deep sea IIOC. Bioturbation promotes the release of HOC from sediments to the surface of the water.