长江口邻近海域赤潮发生区基本特征初探

Preliminary analysis of the characteristics of red tide areas in Changjiang River estuary and its adjacent sea

对长江口邻近海域与赤潮的发生有密切关系、可能影响赤潮生物的生长、迁移、聚集、休眠以及竞争等的一些主要环境特征 ,如流系结构和水团、冲淡水及其转向、上升流、锋面、营养盐的输入及其来源、浮游生物群落特征等进行了综述 ,对该海域赤潮发生的历史记录从时间、地点、赤潮类型等方面作了归纳分析 ,并对 2 0 0 2年在该赤潮发生区开展的现场调查的初步结果作一简略介绍 .

A review was made on the main environmental characteristics such as currents and water body,diluted water and its turning direction,upwelling,front,nutrients and its sources and plankton community in the Changjiang River estuary and its adjacent sea areas which could affect the growth,migration,assembling,resting and competition of harmful algae to form red tides. Analyses were also conducted to reveal features of the red tides events recorded in this area in terms of time,location and causative species. Some preliminary results from recent cruises carried out in the investigated sea area,where red tides were frequently occurring,were introduced.