杭州湾北岸漕泾-柘林近岸海域浮游生物的调查

1996年11月和1997年3月，对漕泾－柘林的近岸海域的浮游生物进行了调查，1996年11月浮游植物平均密度为3．39×104个／L，密集于高潮带，主要有舟形藻、圆筛藻、直链藻等5种藻类，舟形藻为优势种；1997年3月平均密度为1．65×104个／L，密集于潮下带，主要有囊裸藻、针杆藻、小球藻等7种，囊裸藻为优势种．1996年11月，浮游动物的平均个体数为2．84×102个地，原生动物为优势种类；1997年3月，平均个体数为1．83×102个／L，以多毛类疣足幼虫为主；两次调查时浮游动物都密集于低潮带．

The Research on the Plankton of the Offshore Area of Caojin-Zheling,North Hangzhou Bay

The plankton of the offshore area of Caojin-Zheling has been invistigated- In Nov.of 1996, the average number of phytoplankton was 3. 39 X 104/L and concentrated in high tidezone3 the main group belong to Nndcula sp. Meleira sp. Coscndiscas sp., Cocconris sp.and Synera sp. 3 the dominant was Nforula sp.. In Mar. of 1997, the number was 1. 65 X104/L, concentrated in low tide zone, they were Natheula sp., Melosira sp., Coscndiscassp., Cocconeis sp., Synera sp., Cyclotella sp- and Trachelomonas sp., the dominant wasCyclotella sp.. In our invistigations, the zooplankton was concentrated in low tide zone. InNov. of 1996, the number was 2. 84 X 102/L and the dominant was Protoza; in Mar. of1997, the number was 1. 83 X 102/L, and the dominant was Polychaeta. This result can be auseful reference for pollution control and environment management of this area,