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应用生态学报 ›› 2002, Vol. ›› Issue (7): 871-874.

• 研究论文 • 上一篇    下一篇

长江口疏浚弃土悬沙对褶皱臂尾轮虫的影响

王金秋1, 徐兆礼2, 石椿1, 陈亚瞿2   

  1. 1. 复旦大学生命科学学院, 遗传工程国家重点实验室, 上海 200433;
    2. 中国水产科学研究院东海水产研究所, 上海 200090
  • 收稿日期:2000-04-13 修回日期:2002-02-10
  • 通讯作者: 王金秋,女,1962年生,博士后,副教授,主要从事水生生物学研究,近5年来发表相关论文20余篇.E-mail:jqwang@fudan.edu.cn
  • 基金资助:
    国家自然科学基金(39770579);上海市教委曙光计划(99SG05);农业部重点资助项目(渔95B9610010).

Effect of suspended silt from dredging at Yangtze estuary on Brachionus plicatilis

WANG Jinqiu1, XU Zhaoli2, SHI Chun1, CHEN Yaqu 2   

  1. 1. School of Life Sciences, State Key Laboratory of Genetics Engineering, Fudan University, Shanghai 200433;
    2. East China Sea Fishery Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090
  • Received:2000-04-13 Revised:2002-02-10

摘要: 采用克隆培养法(编制生命表)和群体累积培养法,研究了长江口疏浚弃土悬沙对褶皱臂尾轮虫(Brachionus plicatilis)的影响.实验设0(CK)、1、3、5、7、9mg·mL-16个悬沙梯度和20、12×106cells·mL-1两个饵料密度.结果表明,克隆培养时,悬沙可使该轮虫种群的内禀增长率(rm)下降29.6%~64.1%,最大降幅为130.0%.悬沙对轮虫种群的存活率(lx)有影响,而对种群的繁殖率(mx)无显著影响.群体累积培养时,悬沙对轮虫种群的雌体密度、雄体密度、孤雌生殖卵和休眠卵的密度以及种群的动态变化规律无显著影响.可见,长江口疏浚工程会对轮虫动物有一定的负面影响.

关键词: 长江口, 弃土悬沙, 褶皱臂尾轮虫, 格木人工林, 土壤碳氮转化, 枯落物, 微生物群落, 磷脂脂肪酸, 季节动态

Abstract: The effect of suspended silt from dredging at Yangtze estuary on Brachionus plicatilis was investigated by clonal culture (to construct life table) and population accumulative culture. The intrinsic increasing rate of the rotifer population was greatly reduced under different concentrations (1, 3, 5, 7 and 9mg穖L-1) of silt, from 29.6% to 64.1%, and to a maximum of 130.0%. The suspended silt affected population survival rate, rather than its reproduction rate. In accumulative culture, the densities of female, males, parthenogenetic eggs, and resting eggs in the population were not affected by silt. It was concluded that the presence of suspended silt should have a certain negative influence on the rotifer population in dredging Yangtze estuary.

Key words: Yangtze estuary, Suspended silt, Brachionus plicatilis, phospholipid fatty acid, seasonal dynamics, soil C and N transformation, litter, Erythrophleum fordii plantation, microbial community

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