Abstract
Blooms of Microcystis aeruginosa frequently occur in many eutrophic lakes in China, however, there is very little experimental study on the relationship between Microcystis and rotifers from Chinese waters. The effects of different concentrations of toxic M. aeruginosa PCC7820 on two common freshwater rotifers Brachionus calyciflorus and B. rubens were investigated in laboratory experiments. B. calyciflorus was able to utilize this strain of M. aeruginosa as a food source. However, M. aeruginosa suppressed the survival and reproduction of B. calyciflorus at the highest concentration (106 cells/ml) probably due to the inadequate nutrition. B. rubens was inhibited by toxic M. aeruginosa PCC7820 and the inhibition increased with the increasing Microcystis concentration. Our study indicates that the two rotifers have different sensitivities to toxic M. aeruginosa and that toxic cyanobacteria may affect zooplankton community structure by differentially inhibiting the different zooplankton taxa.
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Acknowledgements
We thank Dr. Jun Chen and Mr. Gaodao Liang for kind helps in measuring the microcystin content of Microcystis aeruginosa PCC7820. This work was supported by a fund from the National Natural Science Foundation of China (30530170, 30700088) and by the Nature Science Fund of South-Central University for Nationalities (YZZ07002).
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Geng, H., Xie, P. Experimental studies on the effects of toxic Microcystis aeruginosa PCC7820 on the survival and reproduction of two freshwater rotifers Brachionus calyciflorus and Brachionus rubens . Ecotoxicology 17, 709–715 (2008). https://doi.org/10.1007/s10646-008-0219-8
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DOI: https://doi.org/10.1007/s10646-008-0219-8