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- Title
Effects of Daphnia on microzooplankton communities.
- Authors
Jack, Jeffrey D.; Gilbert, John J.
- Abstract
Intact phytoplankton and microzooplankton communities from eutrophic Star Lake were incubated for 4 days with and without , or a natural assemblage of species. They were sampled at the onset and termination of the experiment for bacterial, phytoplankton, ciliate, rotifer, copepod and cladoceran densities. The cladocerans had varied effects on the rotifers, ranging from significant suppression of most rotifer species () in the jars, to the suppression of one () or no species in the and Star Lake assemblage jars, respectively. Small ciliates (<30 μm, longest dimension), such as sp. and sp., were adversely affected by most of the cladoceran treatments, while several larger ciliates (>81 μm) were unaffected in all such treatments. Ciliates were not consistently more vulnerable to cladoceran suppression than similarly sized rotifers. The suppression of ciliates and rotifers was attributable to both direct effects (predation, interference, or both) and indirect effects (e.g. resource competition) of the cladocerans.
- Publication
Journal of Plankton Research, 1994, Vol 16, Issue 11, p1499
- ISSN
0142-7873
- Publication type
Article