近年来,赤潮发生的频率越来越高。据统计,我国自1990～1998年沿海发生的有害赤潮达234次(吴玉霖等,2001),对海洋渔业、海水养殖业及滨海旅游业等均造成一定的危害,经济损失严重。越来越多的学者开展了赤潮研究(吴玉霖等,2001;齐玉藻,1997),以求尽早弄清赤潮发生机理并准确进行预报。鉴于赤潮发生的复杂性及对其机理的认识, In recent years, the frequency of occurrence of red tide is getting higher and higher. According to statistics, there were 234 harmful red tides in the coastal areas of our country from 1990 to 1998 (Wu et al., 2001), causing some damage to marine fisheries, mariculture and coastal tourism, with serious economic losses. More and more scholars have conducted research on red tide (Wu et al., 2001; Qi Yu algae, 1997) in order to clarify the mechanism of red tide and forecast it accurately. In view of the complexity of red tide occurrence and understanding of its mechanism,