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Effects of Modified Clay on Phaeocystis globosa Growth and Colony Formation

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  • Xiangzheng Ren

    (CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
    Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
    University of Chinese Academy of Sciences, Beijing 100049, China
    Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China)

  • Zhiming Yu

    (CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
    Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
    University of Chinese Academy of Sciences, Beijing 100049, China
    Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China)

  • Lixia Qiu

    (CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
    Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
    University of Chinese Academy of Sciences, Beijing 100049, China
    Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China)

  • Xihua Cao

    (CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
    Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
    Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China)

  • Xiuxian Song

    (CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
    Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
    University of Chinese Academy of Sciences, Beijing 100049, China
    Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China)

Abstract

Phaeocystis globosa is a globally distributed harmful algal blooms (HABs) species dominated by the colonial morphotype, which presents dramatic environmental hazards and poses a threat to human health. Modified clay (MC) can effectively flocculate HAB organisms and prevent their subsequent growth, but the effects of MC on colony-dominated P. globosa blooms remain uncertain. In this paper, a series of removal and incubation experiments were conducted to investigate the growth, colony formation and colony development of P. globosa cells after treatment with MC. The results show that the density of colonies was higher at MC concentrations below 0.2 g/L compared to those in the control, indicating the role of P. globosa colonies in resistance to environmental stress. Concentrations of MC greater than 0.2 g/L could reduce the density of solitary cells and colonies, and the colony diameter and extracellular polysaccharide (EPS) content were also decreased. The adsorption of MC to dissolved inorganic phosphorus (DIP) and the cell damage caused by collision may be the main mechanisms underlying this phenomenon. These results elucidate that the treatment with an appropriate concentration of MC may provide an effective mitigation strategy for P. globosa blooms by preventing their growth and colony formation.

Suggested Citation

  • Xiangzheng Ren & Zhiming Yu & Lixia Qiu & Xihua Cao & Xiuxian Song, 2021. "Effects of Modified Clay on Phaeocystis globosa Growth and Colony Formation," IJERPH, MDPI, vol. 18(19), pages 1-17, September.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:19:p:10163-:d:644647
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    References listed on IDEAS

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    1. Donald M. Anderson, 1997. "Turning back the harmful red tide," Nature, Nature, vol. 388(6642), pages 513-514, August.
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    Cited by:

    1. Jianan Zhu & Zhiming Yu & Liyan He & Xihua Cao & Hena Ji & Xiuxian Song, 2021. "Mechanism by Which MC Controls Harmful Algal Blooms Revealed by Cell Morphology of Aureococcus anophagefferens," IJERPH, MDPI, vol. 18(21), pages 1-13, October.

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