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厦门港浮游植物对磷酸盐吸收速率的研究
洪华生1, 戴民汉1, 黄邦钦1, 李文权2
1.厦门大学环境科学研究中心 厦门 361005;2.厦门大学海洋系 厦门 361005
摘要:
用无载体32P同位素示踪测定海水中浮游植物和细菌吸收磷酸盐速率的方法，对厦门港浮游植物和细菌进行了研究。结果表明，厦门港海水中吸收磷酸盐的主体是浮游植物（几乎占100％），平均吸收速率为4.28×10-5 μmol/(L?s)，并且存在着晚秋＜冬＜初春的季节变化，培养实验的结果表明吸收速率的季节变化主要是由于种类更替和温度效应所致。
关键词:  浮游植物  细菌  磷酸盐  吸收速率
DOI：
分类号:
基金项目:高等学校博士学科点专项科学基金和福建省自然科学基金资助
STUDIES ON RATE OF PHOSPHATE UPTAKE BY PHYTOPLANKTON IN XIAMEN HARBOUR
Hong Huasheng1, Dai Minhan1, Huang Bangqin1, Li Wenquan2
1.Environmental Science Research Center, Xiamen University, Xiamen 361005;2.Department of Oceanography, Xiamen University, Xiamen 361005
Abstract:
A method for determining the rate of phosphate uptake by phytoplankton and bacteria in seawater using carrier-free 32P radiotracer was established. The experiments were carried out from Nov. 1988 to Mar. 1989 in Xiamen Harbour, Fujian, China. The average rate of phosphate uptake by phytoplankton was 4.28×10-5 μmol/(L?s); the turnover time was 0.51 day. In comparison to other regions, there were higher uptake rate and shorter turnover time of phosphate by phytoplankton in Xiamen Harbour.

Results showed seasonal variations in the rate of phosphate uptake (late fall < winter < early spring). Laboratory culture experiments indicated that the change was resulted from sucession of phytoplankton species and temperature. The uptake of inorganic phosphate was predominantly by phytoplankton, but not by bacteria in Xiamen Harbour.
Key words:  Phytoplankton, Bacteria, Phosphate, Uptake rate
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