Abstract:

The variations of chlorophyll a and nutrient contents were investigated at the wharf of the Great Wall Station between December 1999 and March 2000. The chlorophyll a contents were high during the investigation period. The values ranged from 0.603 to 7.667mg/m3 with an average of 2.162mg/m3. With the influence of tide, the highest values occurred both at the beginning and in the middle of months. The nutrient contents and variations were high except for PO_4-P. The order of the contents from high to low was NO_3-N>NH_4-N>NO_2-N>PO_4-P.