除草剂草甘膦对萼花臂尾轮虫生活史特征的影响  

Effects of glyphosate on life history characteristics of freshwater rotifer Brachionus calyciflorus.

作　　者：储昭霞[1] 席贻龙[1] 徐晓平[1] 葛雅丽[1] 董丽丽[1] 陈芳[1] 

机构地区：[1]安徽师范大学生命科学学院重要生物资源保护和利用安徽省重点实验室,芜湖241000

出　　处：《应用生态学报》2005年第6期1142-1145,共4页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(30470323);安徽省优秀青年基金项目(04043050);安徽省教育厅自然科学研究基金重点项目(2003kj032zd);安徽省重点实验室专项基金资助项目.

摘　　要：采用生命表实验方法研究了不同浓度(0.10、0.50、3.00、5.50、8.00和10.50mg·L-1)的除草剂草甘膦对萼花臂尾轮虫生活史特征的影响.结果表明,草甘膦对轮虫的胚胎发育时间、幼体阶段历期、生殖期历期、平均寿命、净生殖率和种群内禀增长率均有显著影响.与对照组相比,当草甘膦浓度为3.00和8.00mg·L-1时,轮虫胚胎发育时间显著延长;达3.00mg·L-1时,轮虫的幼体阶段历期开始显著延长;达8.00和0.50mg·L-1时,轮虫净生殖率和种群内禀增长率分别开始显著降低.在各参数中,种群内禀增长率是较敏感的指标,可用于监测草甘膦对萼花臂尾轮虫生活史特征的影响.The life table study on the life history characteristics of freshwater rotifer Brachionus calyciflorus under effects of different concentrations glyphosate showed that glyphosate had significant effects on the embryonic developmental time,duration of juvenile and reproductive periods,average lifespan,net reproductive rate,and intrinsic population increasing rate of the rotifer.The embryonic developmental time was significantly lengthened when exposed to 3 and 8 mg·L^(-1) glyphosate,the juvenile period began to be lengthened significantly when exposed to 3 mg·L^(-1) glyphosate,while the net reproductive rate and intrinsic population increasing rate decreased significantly when the rotifer was exposed to 8.00 and 10.50 mg·L^(-1) glyphosate,respectively.Among all the parameters,intrinsic population increasing rate was the most sensitive parameter which could be used in monitoring the effects of glyphosate on the life history characteristics of B.calyciflorus.

关 键 词：草甘膦 萼花臂尾轮虫 生活史特征 

分 类 号：X174[环境科学与工程—环境科学]