Model description of trophodynamic behavior of methylmercury in a marine aquatic system.
Model description of trophodynamic behavior of methylmercury in a marine aquatic system.
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DOI：
10.1016/j.envpol.2012.03.007
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发表时间：
2012-07
影响因子：
8.9
通讯作者：
Yindong Tong;Wei Zhang;Xindi C. Hu;Langbo Ou;D. Hu;T. Yang;Wen Wei;Xuejun Wang
中科院分区：
文献类型：
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作者：
Yindong Tong;Wei Zhang;Xindi C. Hu;Langbo Ou;D. Hu;T. Yang;Wen Wei;Xuejun Wang
以渤海湾海洋食物网为研究对象，建立了基于水当量的甲基汞（MeHg）生物累积质量平衡模型，探讨了预测MeHg在食物网中浓度和定量MeHg生物累积的可能性.结果表明，总汞和甲基汞在食物网中均为生物磁体。计算结果与实测值吻合较好，表明该模型可用于食物网中甲基汞浓度的预测。模型输出还表明，代谢和生长稀释可能是减少水生生物体内甲基汞含量的主要机制。随着营养级的升高，食物作为甲基汞来源的贡献逐渐增大，食物来源是甲基汞的主要来源。
A marine food web in Bohai Bay, China, was selected to study methylmercury (MeHg) bioaccumulation, and an aquivalence-based mass balance model was established to explore the possibility of predicting the MeHg concentrations and quantifying MeHg bioaccumulation in the food web. Results showed that both total mercury (THg) and MeHg were biomagnified in the food web. The calculated MeHg concentrations in the selected species agreed well with the measured values, which shows the model could be a useful tool in MeHg concentration prediction in food web. Model outputs also showed that metabolism and growth dilution could be the dominant mechanisms for the reduction of MeHg levels in aquatic organisms. With the increase of trophic level, the contribution of food as a MeHg source for organism is increasing, and MeHg from prey was the dominant source.