黄、东海春季和秋季微型浮游动物对浮游植物的摄食压力

Grazing pressure of microzooplankton on phytoplankton in spring and autumn in the Yellow Sea and East China Sea

2000年秋季（10月21日-11月7日）和2001年春季（4月30日-5月15日）用稀释培养法在黄海和东海测定了微型浮游动物对浮游植物的摄食,结果表明：（1）秋季表层浮游植物叶绿素a（Chl a）的内禀生长率为0.40~0.59 d？1,微型浮游动物对Chl a的摄食率为0.21~0.63 d？1,对Chl a现存量的摄食压力为19%~47%d？1,对Chl a生产力的摄食压力为59%~108%d？1。深层Chl a的内禀生长率为0.25~0.65 d？1,微型浮游动物对Chl a的摄食率为0.29~0.53 d？1,对浮游植物Chl a现存量的摄食压力为25%~41%d？1,对Chl a生产力的摄食压力为86%~114%d？1。（2）春季表层Chl a的内禀生长率为0.01~0.81 d？1,微型浮游动物对Chl a的摄食率为0.13~0.54 d？1,对Chl a现存量的摄食压力为12%~42%d？1,对Chl a生产力的摄食压力为21%~3920%d？1。深层Chl a的内禀生长率为0.55~0.60 d？1,微型浮游动物对Chl a的摄食率为0.57%~0.63 d？1,对Chl a现存量的摄食压力为44%~47%d？1,对Chl a生产力的摄食压力为103%~104%d？1。

Microzooplankton grazing on phytoplankton was estimated using dilution incubation method in Autumn（21 October-7 November） 2000 and Spring（30 April-15 May） 2001 in Yellow Sea and East China Sea.（1） In Au-tumn.In the surface waters,the potential growth rate of Chlorophyll a（Chl a） was in a range of 0.40~0.59 d^-1.Mi-crozooplankton grazing rates on Chl a were 0.21~0.63 d^-1.As a result,microzooplankton grazing pressure on Chl a standing stock and primary production were in the range of 19%~47% d^-1 and 59%~108% d^-1,respectively.In deep waters,the potential growth rates of Chl a were in a range of 0.25~0.65 d？1.Microzooplankton grazing rates on Chl a were 0.29~0.53 d^-1.As a result,microzooplankton grazing pressure on Chl a standing stock and primary produc-tion were in the range of 25%~41% d^-1 and 86%~114% d^-1,respectively.（2） In spring.In the surface waters,the potential growth rates of Chl a were in a range of 0.01~0.81 d^-1.Microzooplankton grazing rates on Chl a were 0.13~0.54 d^-1.As a result,microzooplankton grazing pressure on Chl a standing stock and primary production were in the range of 12%~42% d？1 and 21%~3 920% d^-1,respectively.In deep waters,the potential growth rates of Chl a were in a range of 0.55~0.60 d^-1.Microzooplankton grazing rates on Chl a were 0.57~0.63 d^-1.As a result,micro-zooplankton grazing pressure on Chl a standing stock and primary production were in the range of 44%~47% d^-1 and 103%~104% d^-1,respectively.