关键词: 福建长乐, 东海原甲藻, 赤潮, 主成分分析, Keywords: Changle Fujian, Prorocentrum donghaiense, bloom , principal components analysis

Abstract: Abstract: This paper analysed and discussed the process of a Prorocentrum donghaiense bloom, which occured in Changle Sea Zone of Fujian Province during May 2 and May 10, 2010, based on continuous monitoring of it. This red tide organism could form red tide under weather condition of intense illumination; this organism mainly utilizes nitrate as its nitrogen nutrient after the formation , and it also has remarkable ability to withstand the stress of low phosphorus in the environment. In addition, the principal components analysis of environmental factors in Changle sea area during the monitoring process showed that limiting factors of this red tide include NO3-N, NO2-N, water temperature, salinity, et al.