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Do Bacteria-Sized Marine Eukaryotes Consume Significant Bacterial Production?

Jed A. Fuhrman and George B. McManus
Science
New Series, Vol. 224, No. 4654 (Jun. 15, 1984), pp. 1257-1260
Stable URL: http://www.jstor.org/stable/1692067
Page Count: 4
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Do Bacteria-Sized Marine Eukaryotes Consume Significant Bacterial Production?
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Abstract

Up to 60 percent of the total marine primary production (or about onefourth of the total global carbon dioxide fixation) passes through the free-living bacterioplankton. Grazing by bacteriovores is probably the predominant fate of the bacteria, although data are scarce. Evidence is presented that previously uncharacterized, small eukaryotes that are able to pass even 0.6-micrometer filters may be responsible for a large fraction (more than 50 percent) of the total grazing in coastal waters. These organisms have not yet been observed microscopically.

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