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《Journal of Tropical Oceanography》 2005-03
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STUDIES ON PHYTOPLANKTON COMMUNITY CHANGE AT DAYA BAY DURING A RED TIDE

LI Tao, LIU Sheng, HUANG Liang-min, XU Zhan-zhou, LI Kai-zhi, SU Qiang, SONG Xing-yu, ZHANG Jian-lin(South China Sea Institute of Oceanology, The Chinese Academy of Sciences, Guangzhou 510301, China)  
A small scale red tide was monitored at the Daya Bay, Guangdong Province from August 12th to 29th, 2003. The investigation results showed that the red tide was caused by Scrippsiella trochoidea and Chattonella marina. With environmental factors changing continuously, their quantities kept changing. On August 13th, the phytoplankton community was mainly composed of Scrippsiella trochoidea, whose density was 6.52×10 6cells·L -1 and its proportion in phytoplankton population was over 99%. The red tide achieved its peak on August 19th, when Scrippsiella trochoidea reached its maximum, while Chattonella marina reached its maximum on August 20th. Compared with Chattonella marina, Scrippsiella trochoidea was more adaptable to live in the environment of higher temperature and lower salinity. The composition of phytoplankton community at each station was also analyzed. According to the percentages of two algae, these stations could be classified into three types such as Scrippsiella trochoidea controlling, Chattonella marina controlling and mixture areas, and the three areas kept changing with time. The reason why this red tide could last for such a long time was discussed, i. e. enough stay time and relatively steady environment which suit algal growth and accumulation.
【Fund】: “973”国家重点基础研究发展规划研究项目(2001CB409707);; 广东省重大科技专项(A3050301);; 国家自然科学基金项目(40206016 40229008);; 中国科学院知识创新工程重要方向项目(ZKCX2-SW-212);; 中国科学院野外台站基金项目
【CateGory Index】: X55
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