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Chinese Journal of Applied Ecology ›› 2003, Vol. ›› Issue (7): 1112-1116.

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Nutrients regeneration speed of sediment in harmful algae blooms(HAB) area of East China Sea

QI Xiaohong1, LIU Sumei1, ZHANG Jing1,2, CHEN Hongtao1   

  1. 1. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China;
    2. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
  • Received:2002-12-18 Revised:2003-02-26 Online:2003-07-15

Abstract: The fluxes of dissolved nutrients at sediment-water interface were investigated at 4 stations in the HAB area of East China Sea in May 2001 and May 2002. The benthic fluxes of nutrients were determined by incubating the sediment core samples with bottom seawater bubbled with air or nitrogen. The transfer of nutrients was more active under anoxic condition. The fluxes of dissolved nutrients were generally high at the stations close to the coast. The sediment was the source of SiO32-, which accounted for 6% of primary production. For DIN and PO43-, the sediment was the sink. DIN and PO43- adsorbed by sediment accounted for 5.9% and 67% of the riverine DIN and PO43- inputs, respectively, and the inputs of SiO32- accounted for 7.8%.

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