极地研究

极地研究 ›› 1993, Vol. 5 ›› Issue (4): 50-62.

• 目次 • 上一篇    下一篇

南极普里兹湾及其邻近海域浮游植物粒度分级生物量和初级生产力

宁修仁;刘子琳;史君贤;朱根海;龚敏   

  • 出版日期:1993-12-30 发布日期:1993-12-30

STANDING CROP AND PRODUCTIVITY OF PHYTOPLANKTON AND POC IN PRYDZ BAY AND THE ADJACENT WATERS

  • Online:1993-12-30 Published:1993-12-30

PDF (PC)

1156

被引次数

36

摘要：

本文报道了 1 990 /1 991年夏季在南极普里兹湾及其毗连海域对浮游植物细胞丰度 ,优势种类组成 ,粒度分级生物量和初级生产力和颗粒有机碳浓度的分布及其与环境因子关系的研究。结果表明 ,调查海区具有显著的空间区域化特征 ,普里兹湾及其毗连陆架由于水体较为稳定 ,有利于浮游植物和冰藻的生长 ,其生物量、生产力和颗粒有机碳均较高 ;在普里兹湾北部毗连南印度洋的近南极大陆海域 ,由于水团沿陆坡的扭曲运动和上升流的出现 ,致使西冰架和谢克尔顿冰架之间的北部区域浮游植物生物量 ,生产力和颗粒有机碳均较高。由于浮游植物的大量繁殖 ,使该二区域营养盐浓度降低 ,溶解氧增加。在调查海区的东西两侧则相反。粒度分级结果表明 ,微型 (<2 0 μm)和微微型 (<2 .0 μm)浮游生物在浮游植物群落生物量和生产力中占有重要比重 ,它们对总生物量和总生产力的平均贡献分别为 5 3 %和 6 9%。

关键词: 南极;普里兹湾;南印度洋;浮游植物;初级生产力;颗粒有机碳;粒度分级

Abstract:

Standing stock and productivity of phytoplankton and their cell size structure and the relations with environmental factors in Prydz Bay and the adjacent waters of the Indian sector of the Southern Ocean were observed during summer of 1990/1991.The results showed that there were obvious spatial zonation of above parameters in the studied area. In Prydz Bay and the adjacent shelf chlorophyll, cell abundance, POC and primary productivity were high, which resulted from higher stability of water masses. In offshore beyond the continental shelf between West Ice Shelf and Shackleton Ice Shelf, biomass and productivity of phytoplankton and POC were also high, due to the mixing depth being shallower than euphotic depth.On the contrary,the opposite distribution trends of above parameters were displayed in both east and west zone of the studied area. The results of size-fractionation showed that the contributions of nanoplankton with picoplankton to total phytoplankton biomass was 53%,to total productivity,69%, which proved their importance in phytoplankton community of the Antarctic waters.