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Journal of Applied Phycology

, Volume 26, Issue 1, pp 333–339 | Cite as

Comparative studies on phosphate utilization of two bloom-forming Microcystis spp. (cyanobacteria) isolated from Lake Taihu (China)

  • Tao Yue
  • Delu Zhang
  • Chunxiang Hu
Article

Abstract

Microcystis is a common freshwater bloom-dominating cyanobacterial genus. However, the crucial factors that affect the seasonal succession and extent of dominance of different species remain largely unknown. This study investigated inorganic phosphorus (P) uptake, growth, and P utilization of two dominant Microcystis species from Lake Taihu (China) at different P concentrations and temperatures. Compared with Microcystis wesenbergii, Microcystis flos-aquae had higher maximum uptake rate and luxury storage coefficient. However, M. flos-aquae also had a higher P demand for growth. Under P-rich conditions (64.5 to 174.5 μM), M. flos-aquae had a higher growth rate (0.16 to 0.21 d−1) than M. wesenbergii (0.06 to 0.19 d−1) at 22 to 30 °C. M. wesenbergii, with higher phosphate affinity, had a lower P demand to sustain its growth, and yielded a higher growth rate of 0.10 d−1 at low P concentration (6.5 μM) at 34 °C, whereas M. flos-aquae had a lower growth rate of 0.03 d−1. Therefore, M. flos-aquae was dominant in late spring under P-rich conditions, whereas M. wesenbergii prevailed in hot summer after M. flos-aquae decreased under P-limited conditions. These results agree well with their succession patterns in the field. Overall, succession and dominance of M. flos-aquae and M. wesenbergii in Lake Taihu are regulated by P concentration and water temperature.

Keywords

Microcystis Growth rate Temperature Phosphorus uptake Phosphorus storage 

Notes

Acknowledgments

This work was supported by the National Basic Research Program of China (2008CB418001–1).

Supplementary material

10811_2013_67_MOESM1_ESM.doc (48 kb)
ESM 1 (DOC 48 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Key Laboratory of Algal Biology, Institute of HydrobiologyChinese Academy of SciencesWuhanChina
  2. 2.Graduate School of Chinese Academy of SciencesBeijingChina
  3. 3.Department of Biological Science and BiotechnologyWuhan University of TechnologyWuhanChina

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