海洋蓝细菌在微食物环中作用的初步研究

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

在渤海、汇泉湾小型浮游动物 （Ｍｉｃｒｏｚｏｏｐｌａｎｋｔｏｎ）对蓝细菌（Ｓｙｎｅｃｈｏｃｏｃｃｕｓ ｓｐｐ．）有明 显的捕食压力。春季，有小型浮游动物的实验水体中蓝细菌的日生长率为０．０２～０．２８／ｄ，清 除小型浮游动物的实验水体中蓝细菌的日生长率为０．３８～０．７０／ｄ。汇泉湾有小型浮游动物 的实验水体中蓝细菌日生长率为－０．１２２～０．１８０／ｄ。而无小型浮游动物的蓝细菌生长率为 ０．１３３～０．２８５／ｄ。

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.