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Effect of different mixing modes on the abundance of Microcystis in Lake Taihu under green light

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Abstract

Light and hydrodynamic force are important physical factors affecting growth of Microcystis. The most recent study found that green light has good effect in inhibiting growth of Microcystis. To understand the effect of mixing modes on Microcystis under the green light, we investigated the effects of continuous mixing and intermittent mixing on the abundance of Microcystis in Taihu Lake under field conditions. The study results found that abundance of Microcystis in control, intermittent mixing group, and continuous mixing group decreased 76.62%, 40.36%, and 95.18% on day 7 compared with that on day 1 in this experiment. At the end of the experiment, abundance percentages of diatoms and green algae to total phytoplankton abundance were 1.57% and 0.48% in control, 2.32% and 0.67% in intermittent mixing group, and 22.47% and 20.27% in continuous mixing group. The results indicated that continuous mixing favored the removal of Microcystis under green light conditions and was helpful for the growth of green algae and diatoms. The results provide a new approach for the control of Microcystis blooms.

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Data availability

The datasets generated and/or analyzed during the current study are not publicly available as they also form part of an ongoing study but are available from the corresponding author on reasonable request.

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Acknowledgements

This study was funded by the Central Public Interest Scientific Institution Basal Research Fund, CAFS (no. 2018HY-ZD04).

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Authors and Affiliations

  1. School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, China

    Guijun Yang, Lei Xu & Yunrui Wu

  2. Wuxi River and Lake Governance and Water Resources Management Center, Wuxi, 214000, China

    Hua Su & Jinhua Zhu

  3. Freshwater Fisheries Research Center, CAFS, Wuxi, 214128, China

    Guofeng Liu

  4. School of Resource and Environment, Hubei University, Wuhan, 430062, China

    Xiquan Hu

Authors
  1. Guijun Yang
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  2. Hua Su
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  3. Jinhua Zhu
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  4. Lei Xu
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  5. Yunrui Wu
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  6. Guofeng Liu
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  7. Xiquan Hu
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Contributions

GY analyzed and interpreted the algal data and was the major contributor in writing the manuscript. HS, JZ, LX, and RW measured the relevant physical and chemical parameters. XH proofread and revised the language and content of the manuscript. GL is the main funder of the research. All authors read and approved the final manuscript.

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Correspondence to Xiquan Hu.

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Yang, G., Su, H., Zhu, J. et al. Effect of different mixing modes on the abundance of Microcystis in Lake Taihu under green light. Environ Sci Pollut Res 30, 10158–10164 (2023). https://doi.org/10.1007/s11356-022-22876-2

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  • DOI: https://doi.org/10.1007/s11356-022-22876-2

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