Complementary impact of copepods and cladocerans on phytoplankton.

Sommer, Ulrich, Sommer, Frank, Santer, Barbara, Jamieson, Colleen, Boersma, Maarten, Becker, Claes and Hansen, Thomas (2001) Complementary impact of copepods and cladocerans on phytoplankton. Ecology Letters, 4 (6). pp. 545-550. DOI 10.1046/j.1461-0248.2001.00263.x.

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Abstract

The differences in the impact of two major groups of herbivorous zooplankton (Cladocera and Copepoda) on summer phytoplankton in a mesotrophic lake were studied. Field experiments were performed in which phytoplankton were exposed to different densities of two major types of herbivorous zooplankton, cladocerans and copepods. Contrary to expectation, neither of the two zooplankton groups significantly reduced phytoplankton biomass. However, there were strong and contrasting impacts on phytoplankton size structure and on individual taxa. Cladocerans suppressed small phytoplankton, while copepods suppressed large phytoplankton. The unaffected size classes compensated for the loss of those affected by enhanced growth. After contamination of the copepod mesocosms with the cladoceran Daphnia, the combined impact of both zooplankton groups caused a decline in total phytoplankton biomass.

Document Type: Article
Keywords: Food Webs; cladocera; copepoda; herbivory; phytoplankton; size spectrum; top down control; zooplankton
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
AWI
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1046/j.1461-0248.2001.00263.x
ISSN: 1461-023X
Date Deposited: 27 Mar 2012 05:45
Last Modified: 22 Feb 2017 12:40
URI: http://oceanrep.geomar.de/id/eprint/14105

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