Abstract:Zhelin bay is one of the most important estuaries for marine culture in Guangdong Province of China. With the constantly increasing human population and marine culture in the last 10 years, the ecological environment has significantly changed. Although Phaeocystis blooms had brought tremendous economic loss and ecological damage in this area in 1997 and 1999, few studies followed and previous investigation of nutrients are very little. To understand why Phaeocystis blooms frequently hit this area an...