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Chinese Journal of Applied Ecology ›› 2003, Vol. ›› Issue (7): 1117-1121.

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Effects of terrestrial input on the harmful algal bloom area-with aluminum as an example

REN Jingling1, LIU Sumei1, ZHANG Jing1,2, XIE Liang1, LI Dandan1, CHENG Yan1, ZHU Dedi 3   

  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;
    3. State Oceanic Administration, The Second Institute of Oceanography, Hangzhou 310012, China
  • Received:2002-12-18 Revised:2003-03-19 Online:2003-07-15

Abstract: In recent years,eutrophication and frequently occurred harmful algal blooms (HAB) become serious in the coastal area near Changjiang River estuary,and the nutrients came from Changjiang River may be the main sources for them. Aluminum could be used as a useful tracer for the terrestrial input and the movement of different water mass, since it enters into the natural water with the erosion products of soil and rock,and its residence time in the ocean is short and uneasy to be disturbed by the activities of human being. Based on our results,the concentration of dissolved Al was higher in Autumn than in Summer,and showed some relationships with the salinity and suspended particulate matter (SPM). The concentration of Al in the HABarea was higher than0.04 μmol·L-1, which showed the significant influence from the terrestrial input. The concentration of dissolved Al decreased nearly 40% after the occurrence of HAB, and the flocculation of dissolved Al and its absorption onto the surfaces of biogenic particles might be the main reasons. There still need further study about the variation of Al forms and its mechanism during the occurrence of HAB.

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