Gauss distribution function was utilized to describe the distribution of the mean percentage of the equivalent spherical diameter (BSD) of marine phytoplankton.

• 本文首先利用显微测微法计确定浮游植物粒径分布的大致范围，并以此为指导，利用库尔特计数法得到浮游植物的粒径分布状况和中值等效球径。