Microplastic contamination assessment in water and economic fishes in different trophic guilds from an urban water supply reservoir after flooding
文献类型： 外文期刊
作者： Wu, Jiajun 1 ; Jiang, Zhongguan 1 ; Liu, Yunzhao 1 ; Zhao, Xianfu 3 ; Liang, Yangyang 4 ; Lu, Wenxuan 4 ; Song, Jin 5 ;
作者机构： 1.Anhui Univ, Sch Resources & Environm Engn, Hefei 230601, Peoples R China
2.Anhui Prov Key Lab Wetland Ecosyst Protect & Rest, Hefei 230601, Peoples R China
3.Minist Water Resources & Chinese Acad Sci, Inst Hydroecol, Key Lab Ecol Impacts Hydraul Projects & Restorat, Minist Water Resources, Wuhan 430072, Peoples R China
4.Anhui Acad Agr Sci, Fisheries Res Inst, Key Lab Freshwater Aquaculture & Enhancement Anhu, Hefei 230001, Peoples R China
5.Fengyang Xiaogang Village Water Source Environm T, Chuzhou 233124, Peoples R China
关键词： Microplastics; Economic fish; Flooding; Feeding type; Water supply reservoir
期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：6.789； 五年影响因子：6.914 ）
ISSN： 0301-4797
年卷期： 2021 年 299 卷
页码：
收录情况： SCI
摘要： Rain and floods events are responsible for the transport of microplastics in freshwater ecosystems, yet to date, rare study has examined microplastics pollution in urban water supply reservoirs during such events. In this study, we investigated the concentrations and characteristics of microplastic in water and economic fish species with different feeding guilds in the Dafangying Reservoir, an important source of drinking water for Hefei city. Microplastic concentrations in water were relatively higher than that in natural lakes, indicating abundant microplastic contaminants input through overland runoff triggered by flooding. Our results detected five types (fiber, debris, film, microbead and particle) and six colors (black, transparent, blue, yellow, red and green) of microplastics in water samples. Fiber accounted for the dominant shape, which may result from the household sewage from washing clothes and desquamated fiber transported by wind and overland runoff. Meanwhile, transparent was the predominant microplastic color, which can be ascribe to the widely use of intentionally manufactured transparent disposable plastic commodities in cities. Then in fish samples, the microplastic concentrations ranged from 8.75 to 51.3 items/individual in fish guts, and 9.5-52.6 items/individual in fish gills. Our results demonstrated significant higher microplastic concentrations in planktivorous and herbivorous species. The filter feeding capture mode, i.e., engulfing floating prey through frequently drawing in large volume of water confused with microplastics, may result in the higher microplastic concentrations of planktivorous fishes. Due to the dense microplastics adhering on plant surface, herbivorous fishes can concentrate higher microplastics abundance through the ingestion of macrophytes. According to the biological concentration factor (BCF), all the determined microplastics gave BCF far below 1, suggesting the low bioaccumulation capacity of microplastics in fish species.
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