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Microplastic pollution in rice-fish co-culture system: A report of three farmland stations in Shanghai, China

文献类型： 外文期刊

作者： Lv, Weiwei 1 ; Zhou, Wenzong 1 ; Lu, Shibo 2 ; Huang, Weiwei 1 ; Yuan, Quan 1 ; Tian, Minglu 3 ; Lv, Weiguang 1 ; He, Def 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Ecoenvironm Protect Res Inst, Shanghai 201403, Peoples R China

2.East China Normal Univ, Sch Ecol & Environm Sci, Shanghai 200241, Peoples R China

3.Shanghai Acad Agr Sci, Informat Res Inst Sci & Technol, Shanghai 201403, Peoples R China

关键词： Microplastics; Rice-fish co-culture; Aquatic animals; Agroecosystem

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2019 年 652 卷

页码：

收录情况： SCI

摘要： Microplastics are emerging contaminants of increasing concern. Despite the occurrence of microplastics in farmland soils, the knowledge on microplastics in rice-fish co-culture ecosystems is limited. In this study, we investigated the distribution of microplastics in three rice-fish culture stations in Shanghai. During non-rice and riceplanting periods, microplastics in water, soils and aquatic animals (eel, loach and crayfish) were systematically assayed using methods of NaCl density extraction, H2O2 digestion and micro-fourier transform infrared spectroscopy. Results showed that averagemicroplastic abundanceswere 0.4 +/- 0.1 items L-1, 10.3 +/- 2.2 items kg(-1), 1.7 +/- 0.5 items individual(-1) in water, soils and aquatic animal samples, respectively. We found an increasing trend in microplastic abundances in water, soil and animal samples from non-rice period to rice-planting period. Almost all ofmicroplasticswere found in digestive tracts of animals. Majormicroplastics were small (<1 mm) polyethylene and polypropylene fibers, with color of white and translucent. Size, shape, color and polymer type distributions of microplastics were similarly found in environmental and animal samples. Moreover, microplastic abundances in aquatic animals correlated to abundance in farmland soils. This study, for the first time, reveals the occurrence and characteristics of microplastic pollution in rice-fish culture ecosystem which suggests the potential ecological risks of microplastics in the agroecosystem. (C) 2018 Published by Elsevier B.V.

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