Autotrophic Picoplankton in the Tropical Ocean

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Science  21 Jan 1983:
Vol. 219, Issue 4582, pp. 292-295
DOI: 10.1126/science.219.4582.292


In phytoplankton of the eastern tropical Pacific Ocean from 25 to 90 percent of the biomass (measured as chlorophyll a) and 20 to 80 percent of the inorganic carbon fixation were attributable to particles that could pass a screen with a 1-micrometer pore diameter. Evidence is presented that these are indeed autotrophic cells and not cell fragments.