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Article

Effects of Polyester Microfibers on the Growth and Toxicity Production of Bloom-Forming Cyanobacterium Microcystis aeruginosa

by 1,†, 1,†, 1, 1,2 and 1,2,*
1
Engineering Research Center of Environmental DNA and Ecological Water Health Assessment, Shanghai Ocean University, Shanghai 201306, China
2
Centre for Research on Environmental Ecology and Fish Nutrient of the Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Moshe Gophen
Water 2022, 14(15), 2422; https://doi.org/10.3390/w14152422
Received: 29 June 2022 / Revised: 27 July 2022 / Accepted: 3 August 2022 / Published: 4 August 2022
(This article belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
The global pollution of microplastics (MPs) has attracted wide attention, and many studies have been conducted on the effects of MP qualities or types and particle sizes on aquatic organisms. However, few studies on the impact of polyethylene terephthalate microplastic (mPET) with different colors on phytoplankton in aquatic ecosystems have been carried out. In this study, mPET of three common colors (green, black, and white) in different concentrations (0, 10, 50, 100, and 200 mg/L) were selected to explore effects on a bloom-forming cyanobacterium Microcystis aeruginosa. The growth, photosynthesis, the number and size of colony, and MC-LR production of M. aeruginosa were studied within a 25-days exposure experiment. The results showed that colors of mPET had significant effects on the growth and photosynthesis of this species but the concentration of mPET had no significant effect. The low concentration of green mPET group promoted algal growth, photosynthesis, and the M. aeruginosa exposed to it was easier to agglomerate into colonies. Moreover, both mPET colors and concentrations have a significant impact on the microcystin production of M. aeruginosa. The low concentration of the green mPET group significantly inhibited the production throughout the experiment, while the white and black mPET significantly increased the concentration of extracellular microcystin (MC-LR). Our results provided new insights into the effects of MPs with different colors and concentrations on the growth and physiology of cyanobacteria and provide basic data for the ecological risk assessment and pollution prevention of MPs. View Full-Text
Keywords: microplastics; cell growth; colony formation; microcystin microplastics; cell growth; colony formation; microcystin
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MDPI and ACS Style

Lu, Y.; Huang, R.; Wang, J.; Wang, L.; Zhang, W. Effects of Polyester Microfibers on the Growth and Toxicity Production of Bloom-Forming Cyanobacterium Microcystis aeruginosa. Water 2022, 14, 2422. https://doi.org/10.3390/w14152422

AMA Style

Lu Y, Huang R, Wang J, Wang L, Zhang W. Effects of Polyester Microfibers on the Growth and Toxicity Production of Bloom-Forming Cyanobacterium Microcystis aeruginosa. Water. 2022; 14(15):2422. https://doi.org/10.3390/w14152422

Chicago/Turabian Style

Lu, Yufan, Ruohan Huang, Jialin Wang, Liqing Wang, and Wei Zhang. 2022. "Effects of Polyester Microfibers on the Growth and Toxicity Production of Bloom-Forming Cyanobacterium Microcystis aeruginosa" Water 14, no. 15: 2422. https://doi.org/10.3390/w14152422

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