基于群落水平的新污染物HHCB和AHTN的生态效应研究

新污染物佳乐麝香（HHCB）和吐纳麝香（AHTN）因在环境水体中的高检出和高生态毒性而备受关注。前期开展了HHCB和AHTN的急慢性毒性试验和水生态风险评估，结果显示它们在一些水体中产生慢性生态风险，然而，由于缺乏浮游动植物的慢性数据，群落水平的生态效应也未知，导致不能准确评估HHCB和AHTN对敏感生物和群落效应的生态风险。本项目进一步开展HHCB和AHTN对8种浮游动植物（绿藻、溞类和轮虫）的慢性毒性研究，计算基于物种水平的生态安全阈值，比较分析物种敏感性，获得对HHCB和AHTN污染敏感的水生物名单。此外，开展HHCB和AHTN单物质或并存时的微宇宙试验，探索对群落组成、丰度等的影响，获得基于群落水平的生态效应，揭示种间交互作用对生态效应的影响及规律，探究典型环境相关浓度比例下2种新污染物并存时的群落效应。课题成果为系统识别HHCB和AHTN的水环境危害和准确评估其生态风险提供支撑。

The galaxolide (HHCB) and tonalide (AHTN) have drawn great concern because of their high detection in natural waters and high toxic effects. Acute and chronic toxicity test and ecological risk assessment of HHCB and AHTN were conducted in our previous studies, and the results found that they posed high risk in some waters. However, the toxic effect of HHCB and AHTN on the sensitive organisms and community level can’t be evaluated because of the absent of chronic toxicity study on the zooplankton (phytoplankton) and ecotoxicological effect on community level. Therefore, the chronic toxicity test of HHCB and AHTN on 8 zooplankton (phytoplankton) species will be conducted in this study. Water quality criteria and sensitive aquatic species list will be derived based on species sensitivity distribution analysis. In addition, aquatic microcosm test of single and combined exposure of HHCB and AHTN will be carried out in this study. The ecotoxicological effect on community level will be derived based on the influence on community composition and abundance, and the interspecific interaction on ecological effects and its pattern will be revealed. The results of this study will provide important scientific basis for systematically identifying the water environmental hazards and accurately evaluating the ecological risks of HHCB and AHTN.