title: Trace metals in sediments and benthic animals from aquaculture ponds near a mangrove wetland in Southern China.
abstract: In this study, we measured the concentrations of trace metals (Cr, Cu, Zn, As, Cd, Pb and Hg) in typical cultured animals (crabs, clams, and shrimps) and sediments from aquaculture ponds nearby mangrove wetlands in Zhangjiang estuary, China. The contents of Cr, Cu, Cd, and Pb in mangrove sediments were significantly higher than those in pond sediments, while an inverse distribution was observed for Zn, As, and Hg. Significantly higher concentrations of trace metals were found in clams from the mangrove mudflats compared to those from the aquaculture ponds. The sources of trace metals in the clams were primarily from organic fertilizer, whereas those in the shrimp were from contaminated sediment. The results of geo-accumulation index and the ecological risk assessment indicated that the aquaculture ponds near the mangrove wetlands in this subtropical estuary posed a special risk of endogenous and exogenous trace metal pollution to nearby systems.
authors.affiliation: Food Inspection and Quarantine Technology Center, Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen 518016, China; Shenzhen Key Laboratory for Coastal Dynamics and Environment, Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Wu
authors.affiliation: School of Earth Sciences, China University of Geosciences, Wuhan 430074, China. Electronic address: liujinling@cug.edu.cn.
authors.forename: Jinling
authors.initials: J
authors.lastname: Liu
authors.affiliation: School of Earth Sciences, China University of Geosciences, Wuhan 430074, China.
authors.forename: Xiangyang
authors.initials: X
authors.lastname: Bi
authors.affiliation: Shenzhen Key Laboratory for Coastal Dynamics and Environment, Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
authors.forename: Guanghui
authors.initials: G
authors.lastname: Lin
authors.affiliation: Shenzhen Key Laboratory for Coastal Dynamics and Environment, Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
authors.forename: Christopher C
authors.initials: CC
authors.lastname: Feng
authors.affiliation: Key Lab of MOE for Coast and Wetland Ecosystems, College of the Environment, Xiamen University, Xiamen 361005, China.
authors.forename: Zhengjie
authors.initials: Z
authors.lastname: Li
authors.affiliation: Key Lab of MOE for Coast and Wetland Ecosystems, College of the Environment, Xiamen University, Xiamen 361005, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Qi
authors.affiliation: Key Lab of MOE for Coast and Wetland Ecosystems, College of the Environment, Xiamen University, Xiamen 361005, China.
authors.forename: Tianling
authors.initials: T
authors.lastname: Zheng
authors.affiliation: Key Lab of MOE for Coast and Wetland Ecosystems, College of the Environment, Xiamen University, Xiamen 361005, China.
authors.forename: Liqi
authors.initials: L
authors.lastname: Xie
mesh_terms: D000818:Animals; D017756:Aquaculture; D049872:Bivalvia; D003386:Brachyura; D002681:China; D033364:Decapoda; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000032:analysis*; D019216:Metals, Heavy / Q000032:analysis*; D061005:Ponds; D043982:Rhizophoraceae; D014874:Water Pollutants, Chemical / Q000032:analysis*; D053833:Wetlands
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
keywords: Aquaculture; Mangrove wetland; Trace metal