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Marine Ecology Progress Series

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MEPS 122:1-8 (1995)  -  doi:10.3354/meps122001

Composition of ultraphytoplankton in the central North Atlantic


In the central North Atlantic Ocean, the ultraphytoplankton averaged over depth and season comprises 78% Prochlorococcus spp., 12% Synechococcus spp. and 10% eukaryotic algae by numbers. However, on the basis of light scatter (a substitute for carbon biomass), the average percentages are 11, 2 and 87% respectively. On the basis of red fluorescence (a substitute for chlorophyll biomass), the average percentages are 28, 11 and 61% respectively. On the basis of primary productivity, the average percentages are 19, 13 and 68% respectively. Thus, eukaryotic algae dominate the biomass and productivity of ultraphytoplankton.

Chlorophyll · Cyanobacteria · Flow cytometry · Prochlorophytes · Ultraphytoplankton

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