(Table 1) Biomass per area of picoplankton algae, cyanobacteria, and total picoplankton and their contribution to total phytoplankton biomass in 0-200 m layer

Abundance of picophytoplankton in the Subantarctic and subtropical frontal zones was found to be 10**6-10**7 cells/l. Biomass of eucaryotes and procaryotes reached 2 g/m**2 and accounted for 1-15% of total phytoplankton biomass. A deep peak in the distribution of phytoplankton abundance was found at 40-120 m. Maximum number of dividing cyanobacteria cells occurred at depths of 40-60 m. An estimate of picophytoplankton production shows that picophytoplankton accounts for 30-40% of total primary production.

研究表明，亚南极带（Subantarctic）与亚热带锋面区（subtropical frontal zones）内的超微型浮游植物（picophytoplankton）丰度可达10^6~10^7 个/升。真核生物与原核生物的生物量可达2克/平方米，占浮游植物总生物量的1%~15%。在40~120米水深处，观测到浮游植物丰度分布存在深层峰值。处于分裂状态的蓝细菌细胞数量最大值出现在40~60米水深区间。对超微型浮游植物生产力的估算结果显示，其贡献了总初级生产力的30%~40%。