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Effect of Microcystis aeruginosa on the rotifer Brachionus calyciflorus at different temperatures

  • Xiong Zhang
  • Hong GengEmail author
Article

Abstract

Rotifers are one of the smallest metazoans. They serve as a model organism for ecotoxicological studies. More than 60% of the lakes in China are increasingly eutrophic and they are susceptible to blooms of Microcystis aeruginosa. We investigated the effects of M. aeruginosa on the survival and reproduction of Brachionus calyciflorus using the life table method at different temperatures. The findings showed that concentration of M. aeruginosa significantly affected the intrinsic rate of increase (rm), net reproductive rate (R0), average lifespan (L) and offspring number (p < 0.05). Temperature also significantly affected the generation time (T), average lifespan (L) and offspring number (p < 0.05). Moreover, the interaction between temperature and concentration had statistically significant effects on offspring number (p < 0.05). M. aeruginosa suppressed the survival and reproduction of B. calyciflorus, particularly at a concentration of 106 cells/mL. The rm values of the rotifers exposed at 106 cells/mL decreased more than 200% compared with those of the control group. However, at a lower concentration, 104 cells/mL, M. aeruginosa may supply appropriate nourishment to rotifers. In addition, at concentrations of 105 and 106 cells/mL, the inhibition of rotifers by M. aeruginosa heightened with increasing temperature.

Keywords

Brachionus calyciflorus Microcystis aeruginosa Survival and reproduction Temperature 

Notes

Acknowledgments

We thank Dr. Haiying Wang for her help in the alga cultivation and Dr. Richard McLaughlin and Jun Xu for reviewing this manuscript. This work was supported by the National Natural Science Foundation of China (No. 30700088, 31170439), the fund from the South-Central University for Nationalities (XJS09002), and the Special Fund for Basic Scientific Research of Central Colleges, South-Central University for Nationalities (No. CZY11008).

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Key Laboratory for Microorganism and Bio-transformation, College of Life ScienceSouth-Central University for NationalitiesWuhanChina

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