title: Influence of introduced Sonneratia apetala on nutrients and heavy metals in intertidal sediments, South China.
abstract: To investigate the influence of Sonneratia apetala on nutrients and heavy metals in intertidal sediments, sediment cores of S. apetala marsh and mudflat in Shenzhen Bay, China were analyzed. The results showed that S. apetala improved sediment nutrient properties due to increased total carbon (TC), total nitrogen (TN), and total sulfur (TS). The levels of heavy metals were higher in S. apetala site than in mudflat, including chromium (Cr), nickel (Ni), copper (Cu), zinc (Zn), arsenic (As), cadmium (Cd), lead (Pb), and mercury (Hg). In S. apetala site, TC, TN, and TS were not positively correlated with Cr, Ni, As, Cd, and Pb, indicating their less important roles in trapping heavy metals. There were positive correlations among Ni, Cu, Zn, and Cd in both sites, suggesting similar anthropogenic source. Levels of As were higher than the probable effect level at both sites, indicating their toxicological importance. The geo-accumulation index and potential ecological risk index revealed higher metal contaminations in S. apetala site, especially for Cd, Hg, and As. Multivariate analysis implied that S. apetala alter the biogeochemical cycle of Cd and Cr to a certain extent. These findings indicate that S. apetala may improve soil nutrient properties and facilitate heavy metal accumulation in intertidal sediments.
authors.affiliation: Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China.
authors.forename: Ruili
authors.initials: R
authors.lastname: Li
authors.affiliation: Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China.
authors.forename: Minwei
authors.initials: M
authors.lastname: Chai
authors.affiliation: Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China.
authors.forename: Rongyu
authors.initials: R
authors.lastname: Li
authors.affiliation: Guangdong Neilingding Futian National Nature Reserve, Shenzhen, 518000, China.
authors.forename: Hualin
authors.initials: H
authors.lastname: Xu
authors.affiliation: Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China.
authors.forename: Bei
authors.initials: B
authors.lastname: He
authors.affiliation: Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China. qiugy@pkusz.edu.cn.
authors.forename: Guo Yu
authors.initials: GY
authors.lastname: Qiu
mesh_terms: D001151:Arsenic / Q000032:analysis; D002104:Cadmium / Q000032:analysis; D002244:Carbon / Q000032:analysis; D002681:China; D002857:Chromium / Q000032:analysis; D004463:Ecology; D004784:Environmental Monitoring / Q000379:methods; D005502:Food; D019015:Geologic Sediments / Q000737:chemistry*; D008628:Mercury / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis*; D015999:Multivariate Analysis; D018570:Risk Assessment; D012987:Soil / Q000737:chemistry; D064028:Tracheophyta; D014874:Water Pollutants, Chemical / Q000032:analysis; D053833:Wetlands; D015032:Zinc / Q000032:analysis
chemical_list: D019216:Metals, Heavy; D012987:Soil; D014874:Water Pollutants, Chemical; D002104:Cadmium; D002857:Chromium; D002244:Carbon; D008628:Mercury; D015032:Zinc; D001151:Arsenic
keywords: Ecological risk; Heavy metals; Mangrove; Mudflat; Sediments; Sonneratia apetala