Effects of rifampicin on life table demography of Brachionus calyciflorus under different Scenedesmus obliquus densities
ZHAI Pan, WEN Xin-li, CHEN Zhi-wen, ZHAO Zheng, LI Hai-yang, XI Yi-long
Center of Cooperative Innovation for Recovery and Reconstruction of Degraded Ecosystem in Wanjiang City Belt, Provincial Key Laboratory of Biotic Environment and Ecological Safety in Anhui, College of Life Sciences, Anhui Normal University, Wuhu 241000, China
By means of life-table technique, the effects of rifampicin at 2.0, 4.0, 6.0, 8.0, and 10.0μg/mL on the population growth parameters of Brachionuscalyciflorus under three Scenedesmus obliquus densities (1.0×106, 2.0×106and 4.0×106cells/mL) were studied. The results showed that compared to the controls, rifampicin at all the test concentrations obviously promoted the proportion of sexual offspring under the algal density of 1.0×106cells/mL (P < 0.05). When algal density was 2.0×106cells/mL, rifampicin at 2.0, 4.0 and 10.0μg/mL increased the intrinsic rate of population increase (P < 0.05), and rifampicin at all the test concentrations also increased the proportion of sexual offspring. When algal density was 4.0×106cells/mL, rifampicin at all the test concentrations obviously promoted the intrinsic rate of population increase and the proportion of sexual offspring (P < 0.05). There were significant dose-effect relationships between rifampicin concentration and the life expectancy at hatching, the generation time, the average lifespan, and the average lifespan of the rotifers fed on the 1.0×106cells/mL of algae. When algae density was 2.0×106cells/mL, there were significant dose-effect relationships between the concentration of rifampicin and the proportion of sexual offspring. When algal density was 4.0×106cells/mL, there were significant dose-effect relationships between the rifampicin concentration and the generation time, the net reproductive rate, the intrinsic rate of population increase as well as the proportion of sexual offspring.
翟盼, 温新利, 陈治文, 赵政, 李海洋, 席贻龙. 抗生素利福平对萼花臂尾轮虫生命表参数的影响[J]. 中国环境科学, 2016, 36(6): 1886-1894.
ZHAI Pan, WEN Xin-li, CHEN Zhi-wen, ZHAO Zheng, LI Hai-yang, XI Yi-long. Effects of rifampicin on life table demography of Brachionus calyciflorus under different Scenedesmus obliquus densities. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(6): 1886-1894.
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