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1998年广东大亚湾澳头海域先后发生日本星杆藻 (Asterionellajaponica)水华 (0 1 2 4～ 0 2 2 3)、细弱海链藻 (Thalathiosirasubtilis)水华 (0 4 0 8～ 0 4 2 0 )、裸甲藻 (Gymnodiniumspp .)水华 (0 4 2 9～ 0 5 0 8)、角毛藻(Chaetocerosspp .)水华 (0 5 11～ 0 5 2 0 )。本文研究了水华期间藻类的生消过程及其动态变化 ,并分析环境因子在水华形成和消亡过程中的作用和机制。研究结果显示 :稳定、适宜的水温是水华形成的必要条件 ,水温的急剧改变是水华消散的重要原因。海水盐度的大幅度波动与水华的消散密切相关。连续的低光照对藻类有诱导作用 ,而不同的藻类对光照强度的需求和反应并不完全相同。
Asterionella japonica bloom (0 1 2 4 ~ 0 2 2 3), Thalathiosirasubtilis bloom (0 4 0 8 ~ 0 0 4 0 2) occurred successively in Aotou waters of Daya Bay, Guangdong in 1998, , Gymnodiniumspp. (0 429 ~ 0 588) and Chaetoceros spp. (0 5 11 ~ 0 5 2 0). In this paper, the process of algal blooms and their dynamics during the bloom period were studied, and the roles and mechanisms of environmental factors in the formation and extinction of blooms were analyzed. The results show that stable and suitable water temperature is the necessary condition for the formation of algae bloom. The rapid change of water temperature is the important reason for the dissipation of water bloom. Sea water salinity fluctuations and the dissipation of water is closely related. Continuous low light has an algae-inducing effect, and different algae have different requirements and responses to light intensity.