title: Distribution and ecological risk assessment of heavy metals in surface sediments of a typical restored mangrove-aquaculture wetland in Shenzhen, China.
abstract: The restoration of wetlands has attracted the attention in different countries. Restored coastal wetlands, especially urban wetlands, are sensitive to external pressures. Thus, it is necessary to evaluate the efficiency of the restoration of coastal wetlands, which benefits their management and functional maintenance. In this study, a restored mangrove-aquaculture system in Waterlands Resort at Shenzhen was selected for analysis. The distribution and ecological risk assessment of heavy metals in surface sediments were investigated. The results showed that restoration could effectively decrease the heavy metal concentrations in the sediment, while the restored mangrove posed a moderate ecological risk. Most of the heavy metal concentrations were higher during the dry season compared with the wet season. In addition, during the whole investigation, the sediment quality remained failed to achieve the marine sediment criteria required for aquaculture in China.
authors.affiliation: Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China; School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, PR China.
authors.forename: Jianxiang
authors.initials: J
authors.lastname: Feng
authors.affiliation: Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China. Electronic address: zhu.xiaoshan@sz.tsinghua.edu.cn.
authors.forename: Xiaoshan
authors.initials: X
authors.lastname: Zhu
authors.affiliation: Food Inspection and Quarantine Center, Shenzhen Entry-Exit Inspection and Quarantine Bureau, Shenzhen 518016, PR China.
authors.forename: Hao
authors.initials: H
authors.lastname: Wu
authors.affiliation: School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, 518055, PR China.
authors.forename: Cunxin
authors.initials: C
authors.lastname: Ning
authors.affiliation: Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China; Center for Earth System Science, Tsinghua University, Beijing, 100084, PR China. Electronic address: lingh@tsinghua.edu.cn.
authors.forename: Guanghui
authors.initials: G
authors.lastname: Lin
mesh_terms: D017756:Aquaculture; D002681:China; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods; D052918:Environmental Restoration and Remediation; D019015:Geologic Sediments / Q000737:chemistry*; D019216:Metals, Heavy / Q000032:analysis*; D018570:Risk Assessment; D014874:Water Pollutants, Chemical / Q000032:analysis*; D053833:Wetlands
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
keywords: Ecological risk; Heavy metals; Mangrove restoration; Pearl River estuary; Sediment