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于1991年3月20—21日在大鹏湾首次发生海洋揭胞藻赤潮。对此分析了赤潮发生前后海洋环境因素的变化及其与赤潮的关系；以风速、气压、盐度、温度、磷酸盐、硝酸盐、铵盐、铁离子等8项指标为基础，改变参数组合，对采自1991年3－5月特定站位（S0）的各样方进行聚类分析和比较。结果表明，在盐度为31－32和水温为20℃的适宜条件下，铁离子和风速是形成本次赤潮的主要环境要素；大量营养盐尤其是硝酸盐浓度的增加，是本次赤潮形成的基础。
Marine algae blooms first occurred in Mirs Bay from 20-21 March 1991. In this paper, the changes of marine environmental factors before and after the occurrence of red tide and their relations with the red tide were analyzed. Based on the eight indexes of wind speed, pressure, salinity, temperature, phosphate, nitrate, ammonium and ferric ions, , A cluster analysis and comparison was made on various parties collected from a specific station (S0) from March to May in 1991. The results showed that iron ions and wind speed were the main environmental factors that formed this red tide under the suitable conditions of salinity 31-32 and water temperature 20 ℃. The increase of the concentration of a large number of nutrients, especially nitrate, was the formation of this red tide Foundation.