Grazing rates of crustacean zooplankton communities on intact phytoplankton communities in Canadian Subarctic lakes and ponds

Zooplankton grazing can potentially affect the biomass and composition of phytoplankton communities directly and indirectly. Low chlorophyll a concentration for a given TP concentration and simplified fishless food webs lead to the expectation that zooplankton community grazing rates are high in Sub...

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Bibliographic Details
Published in:Hydrobiologia 2012-09, Vol.694 (1), p.131-141
Main Authors: Symons, Celia C., Arnott, Shelley E., Sweetman, Jon N.
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Aquatic ecosystems
Biological and medical sciences
Biomass
Biomedical and Life Sciences
Chlorophyll
Cladocera
Cold regions
Crustacea
Crustaceans
Daphnia
Ecology
Food webs
Freshwater
Freshwater & Marine Ecology
Fundamental and applied biological sciences. Psychology
General aspects
Grazing
Invertebrates
Lakes
Life Sciences
National parks
Phytoplankton
Plankton
Ponds
Primary Research Paper
Synecology
Zoology
Zooplankton
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Summary:Zooplankton grazing can potentially affect the biomass and composition of phytoplankton communities directly and indirectly. Low chlorophyll a concentration for a given TP concentration and simplified fishless food webs lead to the expectation that zooplankton community grazing rates are high in Subarctic regions; however, zooplankton community grazing rates have not been determined for Subarctic lakes/ponds. We estimated zooplankton community grazing rates on phytoplankton in 12 lakes and ponds in Wapusk National Park, Canada using a microcosm grazing experiment. Lakes and ponds differed in zooplankton taxonomic composition, Chl- a concentration, and zooplankton biomass. We found that the grazing rates on the total chlorophyll a (GR Total ) ranged 0–13.7% grazed per day and the grazing rates on the edible (
ISSN:0018-8158
1573-5117
DOI:10.1007/s10750-012-1137-6