南极普里兹湾边缘浮冰区微型浮游动物的摄食及其氮的排泄  

HERBIVOROUS ACTIVITY AND NITROGEN EXCRETION OF MICROZOOPLANKTON IN THE MARGINAL ICE ZONE OF THE PRYDZ BAY,ANTARCTIC

作　　者：李超伦[1] 孙松[1] 吉鹏[1] 张光涛[1] 张武昌[1] 

机构地区：[1]中国科学院海洋研究所,青岛266071

出　　处：《海洋与湖沼》2000年第6期657-663,共7页Oceanologia Et Limnologia Sinica

基　　金：中国科学院"九五"重大A资助项目,KZ951-A1-205号;国家"九五"科技攻关资助项目,98-927-01-02号

摘　　要：于 1 998— 1 999年夏季在南极普里兹湾边缘浮冰区利用稀释培养实验进行了微型浮游动物对浮游植物的摄食现场实验研究 ,同时对微型浮游动物的氨氮产生率进行了推算。结果表明 ,微型浮游动物的日摄食量为 5 1— 2 5 0mgC/ (m3·d) ,占浮游植物现存量的 1 0 %—65% ,对初级生产力的摄食压力也较大 (34%— 1 0 0 % )。利用微型浮游动物的摄食率推算得出其氮产生率为 0 44— 1 75mg/ (m3·d) ,达到维持现场初级生产所需氨氮的 6 8%—53 6%。由此可见 ,微型浮游动物在南极夏季边缘浮冰区海洋生态系统中 。Based on the dilution technique, microzooplankton herbivorous activity was carried out in the marginal ice zone of the Prydz Bay during the austral summer, 1998—1999. The microzooplankton excretion of nitrogen derived from phytoplankton was also estimated. Results showed that the herbivorous rates of the microzooplankton were between 5 1—25 0 mgC/(m 3·d), equal to 10%—65% of the phytoplankton stock. The microzooplankton grazing pressure on the primary production was high (34%—100%). Excretion of phytoplankton-derived nitrogen by microzooplankton varied between 0 44—1 75 mg/(m 3·d), which could potentially supply 6 8%—53 6% of phytoplankton nitrogen demand. These results support the idea that herbivourous microzooplankton are important in determining the production and fate of phytoplankton in marginal ice zone of the Prydz Bay.

关 键 词：微型浮游动物 摄食 氨氮产生率 普里兹湾 

分 类 号：Q958.885.3[生物学—动物学]