title: Occurrence and Characteristics of Microplastic Pollution in Xiangxi Bay of Three Gorges Reservoir, China.
abstract: Microplastic pollution in inland waters is receiving growing attentions. Reservoirs are suspected to be particularly vulnerable to microplastic pollution. However, very limited information is currently available on pollution characteristics of microplastics in reservoir ecosystems. This work studied the distribution and characteristics of microplastics in the backwater area of Xiangxi River, a typical tributary of the Three Gorges Reservoir. Microplastics were detected in both surface water and sediment with concentrations ranging from 0.55 × 105to 342 × 105items km-2and 80 to 864 items m-2, respectively. Polyethylene, polypropylene, and polystyrene were identified in surface water, whereas polyethylene, polypropylene, and polyethylene terephthalate, and pigments were observed in sediment. In addition, microplastics were also detected in the digestion tracts of 25.7% of fish samples, and polyethylene and nylon were identified. Redundancy analysis indicates a weak correlation between microplastics and water quality variables but a negative correlation with water level of the reservoir and Secchi depth. Results from this study confirm the presence of high abundance microplastics in reservoir impacted tributaries, and suggest that water level regulated hydrodynamic condition and input of nonpoint sources are important regulators for microplastic accumulation and distribution in the backwater area of reservoir tributaries.
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences , Wuhan 430072, China.|State Key Laboratory in Marine Pollution, City University of Hong Kong , Hong Kong SAR, China.|University of Chinese Academy of Sciences , Beijing 100039, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences , Wuhan 430072, China.
authors.forename: Xiong
authors.initials: X
authors.lastname: Xiong
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences , Wuhan 430072, China.
authors.forename: Hongjuan
authors.initials: H
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences , Wuhan 430072, China.
authors.forename: Chenxi
authors.identifier: 0000-0002-2908-9841
authors.initials: C
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences , Wuhan 430072, China.
authors.forename: Yonghong
authors.initials: Y
authors.lastname: Bi
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Sciences, Chinese Academy of Sciences , Nanjing 21008, China.
authors.forename: Yonghong
authors.initials: Y
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences , Wuhan 430072, China.
authors.forename: Bingsheng
authors.initials: B
authors.lastname: Zhou
authors.affiliation: State Key Laboratory in Marine Pollution, City University of Hong Kong , Hong Kong SAR, China.
authors.forename: Paul K S
authors.initials: PK
authors.lastname: Lam
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences , Wuhan 430072, China.
authors.forename: Jiantong
authors.initials: J
authors.lastname: Liu
mesh_terms: D000818:Animals; D061006:Bays; D002681:China; D004784:Environmental Monitoring; D010969:Plastics / Q000032:analysis*; D045483:Rivers; D014874:Water Pollutants, Chemical
chemical_list: D010969:Plastics; D014874:Water Pollutants, Chemical