ELEMENTARY STUDIES ON THE ROLES OF CYANOBACTERIA IN MARINE MICROBIAL FOOD LOOP

The microzooplankton grazed on cyanobacteria (Synechococcus spp. ) was vigorous in Bohai Sea and Huiquan Bay. While there was the microzooplankto in our experimental water, cyanobacteria of daily growth rates were 0. 02-0. 28/d in Bobai Sea (in spring) and - 0. 122-0. 180/d in Huiquan Bay (in spring and autumn). Without the microzooplank- ton, the rates were 0. 38-0. 70/d in Behai Sea and 0. 133- 0. 285/d in Huiquan Bay.