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Nano-Sized Polystyrene at 1 mg/L Concentrations Does Not Show Strong Disturbance on the Freshwater Microbial Community.
Bulletin of Environmental Contamination and Toxicology ( IF 2.7 ) Pub Date : 2020-07-31 , DOI: 10.1007/s00128-020-02956-0
Zhenyan Zhang 1 , Meng Zheng 1 , Bingfeng Chen 1 , Yizhou Pan 1 , Zhihan Yang 1 , Haifeng Qian 1
Affiliation  

In recent years, microplastics and nanoplastics have gained public attention, but their impacts on the freshwater microbial communities is rarely evaluated. In this study, the effects of 1 mg/L nano-sized polystyrene (nPS) and its modified forms (carboxyl-modified and amino-modified nPS) on the structures and functions of freshwater microbial community were determined. The nPS were found to slightly reduce the chlorophyll-a and increase the phycocyanin contents of freshwater microbial communities. Moreover, the richness of the microbial communities temporarily decreased during this process, while their diversity remained uninfluenced by treatment with nPS. Although the three tested nPS types were found to disturb the compositions of both the prokaryotic and eukaryotic communities to some degree, they did not affect the functions of freshwater bacterial communities significantly due to functional redundancy. Our study demonstrated that the ecotoxicities of the nPS itself were found to be lower than what is generally expected.



中文翻译:

浓度为 1 mg/L 的纳米级聚苯乙烯不会对淡水微生物群落产生强烈干扰。

近年来,微塑料和纳米塑料受到了公众的关注,但它们对淡水微生物群落的影响却很少被评估。本研究确定了 1 mg/L 纳米级聚苯乙烯 (nPS) 及其改性形式(羧基改性和氨基改性的 nPS)对淡水微生物群落结构和功能的影响。发现 nPS 略微降低了叶绿素 a 并增加了淡水微生物群落的藻蓝蛋白含量。此外,在此过程中微生物群落的丰富度暂时下降,而它们的多样性不受 nPS 处理的影响。尽管发现三种测试的 nPS 类型在一定程度上扰乱了原核和真核生物群落的组成,由于功能冗余,它们不会显着影响淡水细菌群落的功能。我们的研究表明,发现 nPS 本身的生态毒性低于普遍预期的。

更新日期:2020-07-31
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