Preliminary analysis of the characteristics of red tide areas in Changjiang River estuary and its adjacent sea
长江口邻近海域赤潮发生区基本特征初探

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.