Detrital feeding in natural zooplankton communities: Discrimination between live and dead algal foods |
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| Authors: | Peter L Starkweather Kenneth G Bogdan |
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| Institution: | (1) Department of Biological Sciences, University of Nevada, 89154 Las Vegas, Las Vegas, Nevada, U.S.A.;(2) Department of Biological Sciences, Dartmouth College, 03755 Hanover, New Hampshire, U.S.A. |
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| Abstract: | Freshwater zooplankton species differ in their consumption of live and dead algal cells when tested in situ. Using isotopically-labeled living and heat-killed Chlamydomonas reinhardti as models for phytoplankton and detrital seston, respectively, we tested differential feeding on these foods by 3 rotifers and 2 microcrustaceans. Keratella cochlearis selectively feeds on  detrital materials while 2 sympatric rotifer species, Conochilus dossuarius and Kellicottia bostoniensis show no ability to discriminate between the living and dead foods. Both the copepod Diaptomus spatulocrenatus and a cladoceran, Bosmina sp., differentially consume living cells. |
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| Keywords: | rotifers detritus detrital feeding food selectivity community structure niche microcrustaceans |
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