He M, Wang Z, Tang H
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, PR China.
Sci Total Environ. 2001 Feb 5;266(1-3):291-8. doi: 10.1016/s0048-9697(00)00733-6.
In this paper, an ecological model is proposed to predict the effects of heavy metals on aquatic ecosystems. The bioavailable concentration of metals and a concept of toxicity strength (TS) are combined. The integrated ecological model relates the transport, distribution and speciation of heavy metals and their toxicity, and the effect of environmental variability on metal toxicity. It also emphasizes the link between physical and chemical processes of heavy metals in rivers and ecological effects. Based on the data obtained from research in the CERP project (Co-operative Ecological Research Project), the ecological impact of heavy metals on the aquatic ecosystem of the Le An River (polluted by heavy metals from a copper mine) was predicted. The results show that the estimated values of toxicity strength for surface water are in agreement with the percentage inhibition for the test organism (P. phosphoreum) and that the predicted ecological effect of polluted sediment is consistent with natural variability in aquatic ecosystems.
本文提出了一个生态模型，用于预测重金属对水生生态系统的影响。该模型将金属的生物可利用浓度与毒性强度（TS）的概念相结合。这个综合生态模型关联了重金属的迁移、分布、形态及其毒性，以及环境变异性对金属毒性的影响。它还强调了河流中重金属的物理和化学过程与生态效应之间的联系。基于合作生态研究项目（CERP项目）研究获得的数据，预测了重金属对乐安河（受铜矿重金属污染）水生生态系统的生态影响。结果表明，地表水毒性强度的估计值与受试生物（发光杆菌）的抑制百分比相符，并且受污染沉积物的预测生态效应与水生生态系统的自然变异性一致。
