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Journal of Applied Phycology

, Volume 31, Issue 1, pp 223–233 | Cite as

Involvement of microcystins, colony size and photosynthetic activity in the benthic recruitment of Microcystis

  • Bing Feng
  • Chunbo Wang
  • Xingqiang Wu
  • Cuicui Tian
  • Yingying Tian
  • Bangding XiaoEmail author
Article

Abstract

Cyanobacterial blooms in aquatic environments are a worldwide problem that greatly depend on the recruitment of benthic Microcystis species. In addition to environmental factors, physiological characteristics are also crucial for benthic recruitment of Microcystis, although the exact details remain poorly understood. In the present study, we studied the involvement of physiological characteristics in benthic recruitment from three aspects: photosynthetic activity, colony size and intracellular microcystin (MC) content. After UV irradiation the Microcystis cells were damaged and in poor physiological state. Normal benthic Microcystis (NBM) exhibited higher recruitment than damaged benthic Microcystis (DBM). This might be explained by the difference in photosynthetic activity. Small benthic colonies (20–60 μm) could reinvade the water column from sediments more easily than large colonies. Furthermore, poor physiological state was correlated with lower survival of large colonies (140–220 μm) which might decompose into smaller colonies (40–80 μm). Toxic Microcystis not only survived more easily than non-toxic ones in sediments but also recruited more readily into the water column from sediments. This might be due to the presence of intracellular MCs. During the benthic phase, toxic Microcystis might consume or release intracellular MCs to acclimate to benthic environment. We also found that sediment mixing in the form of passive suspension facilitated recruitment, but physiological characteristics, an active process, played a more decisive role. This knowledge on the physiological characteristics of Microcystis expands our understanding of benthic recruitment.

Keywords

Physiological characteristics Recruitment Benthic Microcystis Microcystin Colony size 

Notes

Acknowledgements

The authors thank Mengchen Zhang at Yunnan University for her help with field sampling.

Funding information

This work was supported by the Major Science and Technology Program for Water Pollution and Treatment (2013ZX0710200), the National Natural Science Foundation of China (31670465 and 31370504), and the Joint NSFC-ISF Research Program, jointly funded by the National Natural Science Foundation of China and the Israel Science Foundation (41561144008).

Supplementary material

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  • Bing Feng
    • 1
    • 2
  • Chunbo Wang
    • 1
  • Xingqiang Wu
    • 1
  • Cuicui Tian
    • 1
  • Yingying Tian
    • 3
  • Bangding Xiao
    • 1
    Email author
  1. 1.Key Laboratory of Algal Biology of Chinese Academy of Sciences, Institute of HydrobiologyChinese Academy of SciencesWuhanChina
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.Henan Institute of TechnologyHenanChina

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