近岸海域底质重金属生态风险评价初步研究

A primary study on ecological risk caused by the heavy metals in coastal sediments

根据金属元素在地壳、海水、近海沉积物和海洋生物体内的丰度，吸收金属毒性实验研究成果，也考虑了沉积物内金属赋存形态对生物体吸收金属的影响，以及海洋生态系统对金属毒性的敏感程度，初步建立了近岸渔业海域沉积物重金属的生态风险评价指标体系。应用该体系对南海东北部红海湾沉积物重金属的生态风险性作试评价，所得结论同其它研究结果互为补充和借鉴，并能为南海区半封闭型海湾规模化养殖的环境容量研究提供有益的参考。

A system for assessment of the potential ecological risk caused by the heavy metals in coastal was established based on the mend element abundance in various environmental media and the marine organisms. The results of metal toxicity investigations, the effects of metal existing form in marine marine sediments on the metal absorption by marine marine and the sensitivity of marine ecosystem to the metal toxicity were also considered The ecological risk of Honghai Bay was evaluated as an example. The results from this evaluation could be ed as a reference of maximum Capacity for large scale aquaculture in the semi-closed bays of South China Sea.