Contrast of nutrient limiting phytoplankton growth in the Changjiang River Estuary and the adjacent areas between summer and winter

ZHAO Wei-hong; WANG Jiang-tao; LI Jin-tao; CUI Xin; WU Yu-lin; MIAO Hui

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ZHAO Wei-hong, WANG Jiang-tao, LI Jin-tao, CUI Xin, WU Yu-lin, MIAO Hui. Contrast of nutrient limiting phytoplankton growth in the Changjiang River Estuary and the adjacent areas between summer and winter[J]. Haiyang Xuebao, 2006, 28(3): 119-126.

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Contrast of nutrient limiting phytoplankton growth in the Changjiang River Estuary and the adjacent areas between summer and winter

1.
Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2.
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China
3.
Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China

Received Date: 2005-07-22
Rev Recd Date: 2005-12-12

Abstract

Abstract

Biogeochemical investigations and the field culture experiments were carried out drom 27 July to 11 August,2001 and 8 to 19 January 2002.The results indicated that the phytoplankton growth was limited by the illumination near the Changjiang River estuary where the transparences were less than 1 m both in summer and in winter.In summer,high biomasses were located at the Zhoushan fishing ground and the north of the Changjiang River Estuary where the salinities ranged from 28 to 31.However,the high biomass distribution area moved to the southeast in winter.Four partition areas were plotted according to the limitation conditions of phytoplankt on growth in summer:Ⅰ.illumination limitation near the estuary area;Ⅱ.phosphorus potential limitation;Ⅲ.the conversion of phosphorus to nitrogen potential limitation;Ⅳ.nitrogen potential limitation.Three areas are parted in winter:Ⅰ.illumination limitation near the estuary area;Ⅱ.phosphorus potential limitation;Ⅲ.nonutrients potential limitation.
- Changjiang River Estuary,
- phytoplankton,
- nutrient limitation

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