关键词: 生物毒性监测;不同营养级生物;敏感性;水质安全评价;

Abstract: As an important means of water quality safety assessment and early warning, biological toxicity monitoring can intuitively reflect the potential risks caused by pollutants to the ecosystem and human health, together with physical and chemical monitoring. To promote the development and application of biological toxicity monitoring technology, the responses of four biological indicators (fish, daphnia, algae and photogenic bacteria) with different trophic levels to different contaminants were studied. The results show that zebrafish has a relatively wide response range and a relatively high response threshold to pollutants. Daphnia magna is the most sensitive to a wide variety of pollutants and has a relatively low response threshold to pollutants. Daphnia magna has a relatively long response time to pollutants and a better early warning sensitivity than zebrafish. The response rang of Chlorella pyrenoidosa to pollutants is narrow, and it is less sensitive to pollutants except diuron. Vibrio fischeri is sensitive and rapid to a wide variety of pollutants, and its response threshold to pollutants is relatively high. It is difficult to give an overall and efficient early warning of pollutants with a single indicator organism, as different indicator organisms have different response range, time and threshold to pollutants. It is necessary to construct a multi-source organisms early warning system to improve the efficiency of early warning.

Key words: biotoxicity monitoring; aquatic organisms of different trophic levels; water quality safety assessment