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The proliferation rule of Microcystis aeruginosa under different initial pH conditions and its influence on the pH value of the environment

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Abstract

This study investigated the characteristics of the proliferation process of Microcystis aeruginosa and its changes to environmental pH values under different initial pH values and different initial inoculation densities. The results showed that although the initial pH value or the initial inoculation density was different, the pH values of the culture systems fluctuated up and down throughout the proliferation of M. aeruginosa, both on a daily and hourly time scale, and then tended to stabilize around the same value of 10.0 at the end of proliferation. The optimal pH value for the proliferation of M. aeruginosa was 9.55. This study creatively proposes that the period when the environmental pH value starts to rise rapidly toward 9.0 could be selected as an early warning period for a cyanobacterial outbreak, and the environmental pH value could be adjusted to below 8.0 to delay the outbreak. These results provide a scientific basis for further understanding the mechanism of cyanobacterial blooms and formulating pH-based control strategies.

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Data availability

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This research was supported by the National Key R&D Program of China (No. 2019YFD0900301).

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All authors contributed to the study conception and design. Sijie Wei analyzed the study data and wrote the initial draft. Guanjie Zhuang and Lirijian Cheng performed the experiments. Shoubing Wang revised the initial draft, acquired funds, and agreed to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved. All authors read and approved the final manuscript.

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Correspondence to Shoubing Wang.

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The authors declare no competing interests.

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Responsible Editor: Vitor Vasconcelos

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Wei, S., Zhuang, G., Cheng, L. et al. The proliferation rule of Microcystis aeruginosa under different initial pH conditions and its influence on the pH value of the environment. Environ Sci Pollut Res 29, 13835–13844 (2022). https://doi.org/10.1007/s11356-021-16719-9

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  • DOI: https://doi.org/10.1007/s11356-021-16719-9

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