摘要
生物暴露试验是评价底泥重金属毒性和生物可给性的唯一途径．试验生物的选择是生物暴露试验成败的关键．采用微生态系统，对食底泥的底栖动物中华圆田螺进行长期暴露试验．结果表明，中华圆田螺是一种理想的底泥重金属毒性和生物可给性指示生物．根据成年中华圆田螺体内积累重金属的生物浓度，可以判断底泥重金属生物可给性的大小．根据新生小田螺的个体数目、成活率、最大个体重量、平均活体重等指标。
The choice of test organisms is important to organism exposure experiment, which is the only way to assess the toxicity and bioavailability of heavy metals in sediment. River snail cipangopaludina cathayensis is an deposit-feed benthic animal, and distributed widely, very suit for test organism. An organism exposure test in micro-ecosystems with long term showed, cipangopaludina cathayensis is an indeal indicator for toxicity and bioavailability of heavy metals in sediment. The bioaccumulation of heavy metals in adult slail's tissue represents the bioavailability, and the number, survival rate, biggest weight, average weight of newborn snail's tissue represents the bioavailability, and the number, survival rate, biggest weight, average weight of newborn snail reflect the toxicity of heavy metals in sediment.
出处
《环境与开发》
1997年第2期8-11,共4页
Environment and Exploitation
基金
国家自然科学基金
关键词
中华圆田螺
毒性
生物监测
底泥重金属
Cipangopaludina cathayensis\ Heavy metal\ Toxicity\ Bioavailability
