【摘要】 报道1998～1999年夏季在南极普里兹湾及其毗邻海域对细胞丰度、优势种类组成、生物量和初级生产力的粒级结构、新生产力及其环境制约机制的研究.结果表明,调查海区具有显著的空间区域化特征.普里兹湾及其毗邻陆架区浮游植物现存生物量和生产力均较高,大陆坡和深海区明显降低;营养盐浓度由于浮游植物的消耗则有相反的分布趋势.浮游植物生物量和生产力受水体的垂直稳定度、浮游动物摄食、水温和光照等环境条件的控制.粒度分级测定结果表明,对调查海区叶绿素a的贡献,小型浮游生物为52.2%,微型为29.4%,微微型为18.4%;对初级生产力的贡献,小型为52.4%,微型为28.7%,微微型为18.9%.研究海区的平均新生产力和f比分别为230.6mg/(m2·d)和0.43.更多还原

【Abstract】 The cell abundance, the composition of dominant species, size fractionated biomass and productivity of phytoplankton, new production, the environmentally restricted mechanism are studied in the Prydz Bay and the adjacent Indian sector of the Southern Ocean during the austral summer of 1998/1999. The results show that there is marked feature of spatial zonation in the sea areas investigated. In the Prydz Bay and its adjacent continental shelf, the biomass and productivity of phytoplankton are high; those of continental slope and open ocean area are obviously low. The nutrient concentration has opposite distribution trend, due to the consumption of phytoplankton. It is mainly affected by the vertical stability of water column, grazing pressure of zooplankton, temperature and light, etc.The results of size-fractionation show that the average contribution of netplankton to total chlorophyll a in the studiy sea areas is 52.2%, those of nano- and picoplankton are 29.4% and 18.4%, respectively. The average contribution of netplankton to total primary production is 52.4%, those of nano- and picoplankton are 28.7% and 18.9%, separately. It is the same as previous conclusion that the contribution of picoplankton to productivity is slightly larger than that to biomass of phytoplankton communities. The average new production and f-ratio are 230.6 mg/(m~2·d) and 0.43, respectively.更多还原