锐劲特和高效氯氰菊酯对原生动物群落的联合毒性  

Joint Acute Toxicity of Fipronil and Bata-Cypermethrin to Protozoa Community

作　　者：刘国光[1] 徐海娟[1] 王莉霞[1] 郑立庆[1] 

机构地区：[1]河南师范大学化学与环境科学学院

出　　处：《环境科学》2005年第1期185-189,共5页Environmental Science

基　　金：河南省创新人才工程资助项目 (教育 [2 0 0 2 ] 5 13 )

摘　　要：与以单种生物为受试对象的毒性试验相比 ,群落级生物毒性试验更接近自然环境 ,更具有现实意义 .本文以淡水中原生动物群落为试验对象对锐劲特和高效氯氰菊酯的急性毒性和联合毒性进行研究 .实验结果表明 ,锐劲特、高效氯氰菊酯对原生动物群落的 4 8h LC50 分别为 35 83mg·L-1,1 92mg·L-1.锐劲特 高效氯氰菊酯联合毒性测定是以等毒性比混配 (配比为18 6∶1)进行的 ,其 4 8h联合毒性相加指数AI为 - 0 0 8,两者表现为弱的拮抗作用 .在低剂量锐劲特和高效氯氰菊酯的联合作用下 ,原生动物群落功能类群发生变化 ,食藻类和食肉类原生动物种类和数量将减少 ,而食菌和碎屑类原生动物将成为相对优势种类 .Compared with the toxicity test on single organism, the effects of toxic pollutants on organisms at community level are more reliable. The acute single and joint toxic effects of Fipronil and Bata-cypermethrin on freshwater protozoa community are studied in this paper. The results show that the 48h-LC 50 of Fipronil and Bata-cypermethrin to the microbial community was 35.83mg·L -1, 1.92mg·L -1, the joint toxicity of Bata-cypermethrin and Fipronil was antagonism in 48h with toxicity 1∶1 to freshwater protozoa community, and Additive Index was -0.08. The structure of protozoa community would change in a low concentration of Bata-cypermethrin and Fipronil mixture; the species and population of Algivores(A) and Predators Raptors (P) would reduce but Bactivoresdetrivores(B) would become predominant relatively.

关 键 词：联合毒性 微型生物群落 锐劲特 高效氯氰菊酯 

分 类 号：X51[环境科学与工程—环境工程]