title: Geochemical characteristics of phosphorus in surface sediments of two major Chinese mariculture areas: the Laizhou Bay and the coastal waters of the Zhangzi Island.
abstract: Phosphorus (P) in surface sediments of the Laizhou Bay (LB) and the coastal waters around the Zhangzi Island (ZI) was analyzed. Six forms of P were separated - exchangeable or loosely sorbed P (Ads-P), aluminum-bound P (Al-P), iron-bound P (Fe-P), authigenic apatite plus CaCO3-bound P plus biogenic apatite (Ca-P), detrital apatite plus other inorganic P (De-P) and organic P (OP). The average contents of P in the LB were in the order: De-P>OP>Ca-P>Fe-P>Ads-P>Al-P; in the ZI, the corresponding order was De-P>OP>Fe-P>Ca-P>Ads-P>Al-P. Due to the high nutrient loadings from the surrounding rivers, TP contents in sediments of the LB were higher than in those of the ZI. The potential bio-available P (Ads-P and OP) accounted for 14.7% and 24.2% of TP in sediments of the LB and the ZI, respectively.
authors.affiliation: Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, China; College of City and Architecture Engineering, Zaozhuang University, Zaozhuang, Shandong 277160, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Zhuang
authors.affiliation: Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, China. Electronic address: xlgao@yic.ac.cn.
authors.forename: Xuelu
authors.initials: X
authors.lastname: Gao
authors.affiliation: Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, China.
authors.forename: Qianguo
authors.initials: Q
authors.lastname: Xing
authors.affiliation: Institute of Marine Sciences, National Research Council, Arsenale-Tesa 104, Castello 2737/F, 30122 Venice, Italy.
authors.forename: Luigi
authors.initials: L
authors.lastname: Tosi
authors.affiliation: Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, China.
authors.forename: Song
authors.initials: S
authors.lastname: Qin
mesh_terms: D017756:Aquaculture; D061006:Bays; D005591:Chemical Fractionation; D002681:China; D019015:Geologic Sediments / Q000737:chemistry*; D010758:Phosphorus / Q000032:analysis*; D017553:Phosphorus Compounds / Q000032:analysis* / Q000737:chemistry; D045483:Rivers / Q000737:chemistry
chemical_list: D017553:Phosphorus Compounds; D010758:Phosphorus
keywords: China; Geochemical characteristics; Marine aquaculture area; Phosphorus fractionation; Sequential extraction; Surface sediment