摘要
利用生命表技术对连续3个世代暴露于不同浓度(20、40、80、160、320μg/L和640μg/L)艾试剂(aldrin)溶液中的多刺裸腹溞(Moina macrocopa)生命表统计学参数进行了研究。结果表明:艾试剂对3个世代多刺裸腹溞所有生命表统计学参数均有显著性影响(P<0.05)。与空白对照组相比,浓度高于80μg/L的艾氏剂使多刺裸腹溞母代的生命期望和净生殖率显著降低;浓度高于160μg/L的艾氏剂使母代的世代时间显著缩短,种群内禀增长率显著降低。浓度高于40μg/L的艾氏剂使多刺裸腹溞F1代的生命期望显著缩短,20μg/L和80～640μg/L的艾试剂使F1代的净生殖率显著降低,320μg/L和640μg/L的艾氏剂使F1代的世代时间显著缩短,所有浓度的艾试剂均使F1代的种群内禀增长率显著降低。160～640μg/L的艾氏剂使多刺裸腹溞F2代的生命期望和世代时间显著缩短,160μg/L和640μg/L的艾氏剂使F2代的净生殖率显著降低;除40和320μg/L外,所有浓度的艾试剂均显著提高了F2代的种群内禀增长率。在实验设置的艾试剂浓度范围内,除F2代种群内禀增长率外,3个世代多刺裸腹溞的所有生命表统计学参数均与艾试剂浓度呈曲线相关诼远拘允匝橹?污染物对多刺裸腹溞生命表统计学参数的影响因其暴露时所处发育时期和持续暴露世代数的不同而存在着重要的差异。
The effects of different concentrations（20,40,80,160,320 μg/L and 640 μg/L） of aldrin on the life table demography of three successive generations of Moina macrocopa were studied,and the results showed that the aldrin affected significantly all the life table demographic parameters of three successive generations of M.macrocopa.Compared with the blank controls,aldrin at concentrations higher than 80 μg/L decreased life expectancy at birth and net reproduction rate of maternal generation of the cladoceran,and that at concentrations higher than 160 μg/L shortened generation time and decreased intrinsic rate of population growth.Aldrin at concentrations higher than 40 μg/L decreased life expectancy at birth of F1 generation of the cladoceran,that at 20 μg/L and 80-640 μg/L decreased net reproduction rate,that at 320 and 640 μg/L shortened generation time,and that at all the concentrations decreased intrinsic rate of population increase.Aldrin at 160-640 μg/L shortened life expectancy at birth and generation time of F2 generation of the cladoceran,that at 160 and 640 μg/L decreased net reproduction rate,but that at all the concentrations except for 40 and 320 μg/L increased intrinsic rate of population increase.In the rang of experimentally designed aldrin concentrations,all the life table demography of three successive generations of M.macrocopa except for the intrinsic rate of population increase of F2 were curvinearlly correlated with aldrin concentrations.In chronic toxicity tests,the effect of aldrin on the life table demography of M.macrocopa differed with developmental stages and exposed generations of the test animal.
出处
《生态学报》
CAS
CSCD
北大核心
2009年第10期5358-5365,共8页
Acta Ecologica Sinica
基金
国家自然科学基金资助项目(30470323)
国家教育部科学技术研究重点项目基金(051286)
安徽省优秀青年基金资助项目(08040106904)
安徽省教育厅自然科研基金重点资助项目(2003kj032zd)
安徽省重要生物资源的保护和利用研究重点实验室专项基金资助项目
