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Science 22 June 1984:
Vol. 224. no. 4655, pp. 1340 - 1342
DOI: 10.1126/science.224.4655.1340
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Articles

The Association of Iron and Manganese with Bacteria on Marine Macroparticulate Material

JAMES P. COWEN 1 and MARY WILCOX SILVER 1

1 Center for Coastal Marine Studies, University of California, Santa Cruz 95064

Evidence of in situ metal (iron and manganese) deposition onto bacteria associated with rapidly sinking particles in the open ocean is reported. Below 100 meters, bacteria are found with extracellular capsules containing metal precipitates; the frequency of these capsules increases with depth. The capsular metal deposits appear to contribute a major portion of the weakly bound fraction of the particulate iron flux.

Submitted on December 28, 1983
Accepted on April 26, 1984


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