珠江口及其邻近海域赤潮的研究

Study on the red tide in the Pearl RiverEstuary and its near waters

珠江口水域赤潮生物种类繁多，达９８种（其中有些是有毒或有害种类），是发生赤潮的潜因。本文列举了发生在珠江口及其邻近海域的赤潮事件和危害，阐述了１９９８年春季珠江口发生的大规模、持续时间长、危害程度大的密氏裸甲藻赤潮事件，结果表明：赤潮生物密度平均为３６×１０６个／ｄｍ３（０６３×１０６～７６×１０６个／ｄｍ３），造成经济损失３５亿元，其中香港３０亿元。

This paper deals with many species of red tide organisms in the Pearl River Estuary (up to 98 species among them which are toxic and harmful) and these species become the reason occurring the red tide appearance, the red tide events happened in the Pearl River Estuary and its near waters are enumerated. The studies shown that the big scale, long lasting and more harmful red tide caused by Gymnodinium mikimotoii in the Pearl River Estuary in the spring of 1998. The density of organisms in the cage cultivation area of Guishan was 063106760106 cells/dm3, with the mean of 367106 cells/dm3. This red tide led to a great loss of 350 million Yuan to the mariculture industry of HongKong and Guangdong (HongKong 300 million, Guangdong 50 million).Z