温度和集胞藻浓度对轮虫生活史参数的影响

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英文篇名：Effects of temperature and Synechocystis sp.PCC6803 on the life history parameters of Brachionus calyciflorus 作者：耿红 ; 姚慧 ; 张鹏 ; 宋发军 ; 林爱华 ; 孟艳艳 ; 张欢 英文作者：GENG Hong;YAO Hui;ZHANG Peng;SONG Fajun;LIN Aihua;MENG Yanyan;ZHANG Huan;College of Life Science, Hubei Provincial Key Laboratory for Protection and Application of Special Plant Germplasm in Wuling Area of China, South-Central University for Nationalities;Institute of Hydrobiology, Chinese Academy of Sciences; 关键词：萼花臂尾轮虫 ; 温度 ; 集胞藻 ; 净生殖率 ; 世代时间 ; 内禀增长率 英文关键词：Brachionus calyciflorus;;temperature;;Synechocystis sp.;;net reproductive rate;;generation time;;intrinsic growth rate 中文刊名：ZNZK 英文刊名：Journal of South-Central University for Nationalities(Natural Science Edition) 机构：中南民族大学生命科学学院武陵山区特色资源植物种质保护与利用湖北省重点实验室;中国科学院水生生物研究所; 出版日期：2019-03-15 出版单位：中南民族大学学报(自然科学版) 年：2019 期：v.38;No.130 基金：中央高校基本科研业务费专项基金资助项目(CZP17012) 语种：中文; 页：ZNZK201901009 页数：6 CN：01 ISSN：42-1705/N 分类号：54-59

摘要

以萼花臂尾轮虫为研究对象,设置3种温度,4个集胞藻浓度梯度,利用动态生命表法探讨了温度和集胞藻浓度对轮虫生活史参数的影响.结果表明,温度、集胞藻浓度以及两者的交互作用均对萼花臂尾轮虫种群的净生殖率(R_0)、世代时间(T)和内禀增长率(r_m)有极显著影响.温度为15℃时,轮虫的净生殖率随集胞藻浓度的升高而显著增加,温度为25℃和35℃时,轮虫的净生殖率随集胞藻浓度的升高出现下降的趋势.随温度的升高,轮虫世代时间明显缩短;相同温度下,不同实验组轮虫的世代时间也随集胞藻浓度的升高而趋于缩短.当温度为15℃时,轮虫的内禀增长率随集胞藻浓度的升高而显著增加,但是随着温度升高,集胞藻对于轮虫内禀增长率的促进作用减弱.结果显示,集胞藻可以为轮虫种群提供一定的营养,温度的升高降低了集胞藻对轮虫种群的促进作用,本研究结果为温度变化下浮游动物种群对不同蓝藻种类的响应提供了数据基础.
        The aim of this study was to investigate effects of temperature and different concentrations of Synechocystis sp. PCC6803 on the life history parameters of Brachionus calyciflorus. The dynamic life table experiment was conducted at three temperatures with four different concentrations of Synechocystis sp. The results showed that both temperature and the concentration of Synechocystis sp. had significant effects on the net reproduction rate(R_0), generation time(T) and intrinsic growth rate(r_m) of B.calyciflorus and they also showed a significant interactive effect. At 15 ℃, R_0 significantly increased with the increasing concentrations of Synechocystis sp. However, at 25 ℃ and 35 ℃, R_0 tended to decrease with the increasing concentrations of Synechocystis sp.The generation time was shortened by the elevated temperature and high concentration of Synechocystis sp. The r_m of rotifer was remarkably enhanced by the increased concentrations of Synechocystis sp. at 15 ℃. While the promoting effect of Synechocystis sp. on the r_m has weakened with the elevated temperature. The results indicated that Synechocystis sp. can provide certain nutrients for the rotifer population. The elevated temperature decreased the promotion effects of Synechocystis sp. on the rotifer population. The results of this study can provide fundamental data about the response of zooplankton to cyanobacteria suffered by the temperature changes.

引文

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