The data obtained on the June cruise, combined with data collected on the DOE cruise 

 last May, by ourselves (bacterivory via FLB-uptake) and others, should give a fairly detailed 

 picture of the abundance, biomass distribution, and grazing activities of the heterotrophic protist 

 assemblage in the context of the biomass standing stocks and productivities of their bacterial and 

 phytoplankton prey. The June cruise will be the first time that high-resolution sampling of the 

 grazing activity as well as abundance of protists will be made. 



Keywords: microzooplankton, herbivory, bacterivory, enzyme assays 



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