title: Matrix-bound phosphine and phosphorus fractions in surface sediments of Arctic Kongsfjorden, Svalbard: effects of glacial activity and environmental variables.
abstract: The surface sediments were collected from the glacial bay (GLAC), the central basin (CENTR) and their transition area (TRANS) along the fjord Kongsfjorden axis on Svalbard, Arctic, and matrix-bound phosphine (MBP), phosphorus fractions and alkaline phosphatase activity (APA) were analyzed. MBP was found in all the sediments with the concentration range of 8.93-59.45 ng kg(-1) dw. The MBP levels in the CENTR sediments were two times higher than those in the GLAC and TRANS sediments, and the yield of phosphine (PH3) as a fraction of total phosphorus ranged from 1.78×10(-8) to 3.53×10(-8) mg PH3 mg(-1)P. The CENTR and TRANS sediments showed higher concentrations of total phosphorus (TP), organic phosphorus (OP) and APA than the GLAC sediments, indicating that glacial activity had an important effect on the spatial variability in the concentrations of MBP and phosphorus fractions. There existed a significant positive correlation (p<0.01) between MBP and seawater depths, OP, TP, APA, total organic matter, total nitrogen and total sulfur. The multiple stepwise regression model ([MBP]=16.1[OP]+18.6[APA]-26.1pH+221.3) was obtained between MBP concentrations and environmental variables. This model could be used to predict MBP levels in the sediments. Our results indicated that the production of MBP was associated with OP decomposition and microbially mediated factors in the sediments of Kongsfjorden in Arctic.
authors.affiliation: Institute of Polar Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei City, Anhui Province 230026, PR China. Electronic address: zhurb@ustc.edu.cn.
authors.forename: Renbin
authors.initials: R
authors.lastname: Zhu
authors.affiliation: Institute of Polar Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei City, Anhui Province 230026, PR China.
authors.forename: Wei
authors.initials: W
authors.lastname: Ding
authors.affiliation: State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, PR China.
authors.forename: Lijun
authors.initials: L
authors.lastname: Hou
authors.affiliation: Institute of Polar Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei City, Anhui Province 230026, PR China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Wang
mesh_terms: D001110:Arctic Regions; D004784:Environmental Monitoring / Q000379:methods; D063366:Estuaries; D019015:Geologic Sediments / Q000737:chemistry*; D010720:Phosphines / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis*; D012623:Seawater / Q000737:chemistry; D013538:Svalbard; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D010720:Phosphines; D014874:Water Pollutants, Chemical; D010758:Phosphorus; C044646:phosphine
keywords: Arctic fjord; Inorganic phosphorus; Organic phosphorus; Phosphatase activity; Sediments