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Science 11 June 1982:
Vol. 216. no. 4551, pp. 1225 - 1227
DOI: 10.1126/science.216.4551.1225
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Articles

The Role of Surface Chemistry in Filter Feeding by Zooplankton

JEROEN GERRITSEN 1 and KAREN G. PORTER 1

1 Institute of Ecology and Department of Zoology, University of Georgia, Athens 30602

Surface chemistry of both particles and animals is important in filter feeding at low Reynolds number. Daphnia magna, fed mixtures of three sizes of polystyrene particles, retained particles that were smaller than the mesh size of the animals (1.0 micrometer) at greater efficiencies than predicted by a sieving model. Retention efficiency of the smallest particles (0.5 micrometer) was increased when negative surface charge on the particles was neutralized, and retention was decreased when a nonionic surfactant was, added to reduce wettability.

Submitted on December 24, 1981
Revised on March 30, 1982


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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M. Germ, T. Simcic, A. Gaberscik, B. Breznik, and M. Hrastel (2004)
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