title: Effects of hydrodynamics on the distribution of trace persistent organic pollutants and macrobenthic communities in Bohai Bay.
abstract: In recent years, the rapid economic development along Bohai Bay, has brought out continuous increasing of the pollution loads in the Bohai Sea, especially by the large coastal reclamation project, Tianjin Binhai New Area. In the period of 2007-2009, we collected the sediments of the main rivers, estuaries, intertidal zone, and near-shore area of Bohai Bay, and Macrobenthos associated with the marine sediments to assess the influence of hydrodynamics in the coastal environment on the pattern of trace contaminants and the macrobenthic community. Based on data derived from these samples, the levels of polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) in sediments followed the order PAHs>OCPs>PCBs>PBDEs. The higher concentrations of PCBs, OCPs, PAHs and PBDEs were found in the estuarine and near-shore environment of the Dagu Drainage River. The spatial distribution of OCPs was different to that of PCBs due to the direction of the velocity field of Bohai Bay in its old and new topography, and the higher water-solubility of OCPs than that of PCBs. The results of the Pearson correlation and the PCA indicate that the medium diameter (MD) of sediments was the predominant factor influencing the distribution of PCBs and OCPs, most sampling sites were characterized mainly by TOC of sediments and biomass of macrobenthos. The results indicate that the distribution of trace contaminants and macrobenthic community in Bohai Bay are mainly affected by the hydrodynamic conditions.
authors.affiliation: State Environmental Protection Key Laboratory of Estuary and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Binghui
authors.initials: B
authors.lastname: Zheng
authors.forename: Xingru
authors.initials: X
authors.lastname: Zhao
authors.forename: Lusan
authors.initials: L
authors.lastname: Liu
authors.forename: Zicheng
authors.initials: Z
authors.lastname: Li
authors.forename: Kun
authors.initials: K
authors.lastname: Lei
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Yanwen
authors.initials: Y
authors.lastname: Qin
authors.forename: Zhifen
authors.initials: Z
authors.lastname: Gan
authors.forename: Shizhen
authors.initials: S
authors.lastname: Gao
authors.forename: Lixin
authors.initials: L
authors.lastname: Jiao
mesh_terms: D000818:Animals; D059001:Aquatic Organisms / Q000254:growth & development; D044822:Biodiversity; D002681:China; D004784:Environmental Monitoring; D005618:Fresh Water / Q000737:chemistry; D019015:Geologic Sediments / Q000737:chemistry; D055768:Halogenated Diphenyl Ethers / Q000032:analysis / Q000737:chemistry; D006843:Hydrocarbons, Chlorinated / Q000032:analysis / Q000737:chemistry; D057446:Hydrodynamics; D007448:Invertebrates / Q000254:growth & development*; D009930:Organic Chemicals / Q000032:analysis* / Q000737:chemistry; D010575:Pesticides / Q000032:analysis / Q000737:chemistry; D011078:Polychlorinated Biphenyls / Q000032:analysis / Q000737:chemistry; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000737:chemistry; D011157:Population Dynamics; D012623:Seawater / Q000737:chemistry*; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D055768:Halogenated Diphenyl Ethers; D006843:Hydrocarbons, Chlorinated; D009930:Organic Chemicals; D010575:Pesticides; D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls