The importance of picophytoplankton and its top-down control in marine environments

摘要

@@ Phytoplankton are classfied into three groups based on size: microphytoplankton (＞20 μm),nanophytoplankton (2-20 μm),and picophytoplankton(＜2 μm) (Sieburth et al.1978)[1].Picophytoplanktonare composed of three groups:Prochlorococcus,Synechococcus,and picophytoeukaryotes.The former two are unicellular cyanobacteria.