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生态学杂志 ›› 2012, Vol. 31 ›› Issue (02): 388-393.

• 研究报告 • 上一篇    下一篇

钼对多刺裸腹溞的毒性

张根,汪涵,陈蕾,蔡凌睿,孙振伟,郑撼,温新利,席贻龙   

  1. 安徽师范大学生命科学学院, 安徽省高校生物环境与生态安全省级重点实验室, 安徽芜湖 241000
  • 出版日期:2012-02-08 发布日期:2012-02-08

Toxicity of molybdenum to cladoceran Moina macrocopa.

ZHANG Gen, WANG Han, CHEN Lei, CAI Ling-rui, SUN Zhen-wei, ZHENG Han, WEN Xin-li, XI Yi-long**   

  1. College of Life Sciences, Provincial Key Laboratory of Biotic Environment and Ecological Safety in Anhui, Anhui Normal University, Wuhu 241000, Anhui, China
  • Online:2012-02-08 Published:2012-02-08

摘要: 运用急性毒性和生命表实验方法,研究了钼对多刺裸腹溞(Moina macrocopa)的急性毒性和生命表统计学参数的影响。结果表明,钼对多刺裸腹溞的48 h LC50值为134.46 mg·L-1,95%置信区间为107.05~194.53 mg·L-1;在2.0~15.0 mg·L-1的浓度范围内,钼对多刺裸腹溞的生命期望、世代时间、平均寿命和净生殖率均无显著影响,但对种群内禀增长率有显著影响。空白对照组中,多刺裸腹溞的种群内禀增长率为0.0448±0.0033 h-1,显著高于6.4、8.4、11.2和15.0 mg·L-1钼浓度下多刺裸腹溞的种群内禀增长率(分别为0.0334±0.0007、0.0327±0.0010、0.0335±0.0003和0.0346±0.0005 h-1)。与其他已测试的物种相比,多刺裸腹溞对钼具有较强的敏感性;在所研究的生命表统计学参数中,种群内禀增长率是最敏感的指标。

关键词: 物种丰富度, 气候, 边界限制, 面积, 垂直格局, 白水江自然保护区

Abstract: By means of acute toxicity and life-table experiments, this paper studied the acute toxicity of molybdenum (Mo) to Moina macrocopa and the effects of Mo on the life-table demographic parameters of M. macrocopa. The 48 h LC50 of M. macrocopa for Mo was 134.46 mg·L-1, with the 95% confidence interval of 107.05-194.53 mg·L-1. At concentrations of 2.0-15.0 mg·L-1, Mo had no significant effects on the life expectancy at birth, generation time, average life span, and net reproduction rate, but affected the intrinsic rate of M. macrocopa population increase significantly. In the control, the intrinsic rate of M. macrocopa population increase was 0.0448±0.0033 h-1, which was higher than that when the M. macrocopa was exposed to 6.4, 8.4, 11.2, and 15.0 mg·L-1 of Mo (0.0334±0.0007, 0.0327±0.0010, 0.0335±00003, and 00346±00005 h-1, respectively). Compared with other test organisms, M. macrocopa was more sensitive to Mo, and among all the life-table demographic parameters, the intrinsic rate of population increase was the most sensitive.

Key words: climate, boundary constraint, area, vertical patterns, Baishuijiang Nature Reserve., species richness