Variation in the response of crustacean zooplankton species richness and composition to the invasive predator Bythotrephes longimanus.

TitleVariation in the response of crustacean zooplankton species richness and composition to the invasive predator Bythotrephes longimanus.
Publication TypeJournal Article
Year of Publication2006
AuthorsStrecker AL, Arnott SE, Yan ND, Girard RE
JournalCanadian Journal of Fisheries & Aquatic Sciences
Volume63
Issue9
Pagination2126 - 2136
Date Published09/2006
ISSN0706652X
KeywordsBiological invasions, Cladocera, ECOSYSTEM health, KAIROMONES, PALEOCLIMATOLOGY, RESEARCH, SPECIES distribution, SPECIES pools, Zooplankton
Abstract

The predacious invertebrate Bythotrephes longimanus has now invaded >90 freshwater lakes in North America.There is some evidence that B. longimanus has a negative effect on summer zooplankton species richness; however,no study has examined the effect of B. longimanus throughout the ice-free season in more than one lake. Wevisited 10 invaded and 4 reference lakes every 2 weeks from May to September, collecting B. longimanus, crustaceanzooplankton, and water chemistry samples. Composite samples were pooled across the study season for each lake.Bythotrephes longimanus significantly reduced cladoceran species richness, diversity, and abundance, and the total zooplanktoncommunity also exhibited decreased richness, diversity, and abundance. Seasonal sampling was better thansynoptic surveys at detecting changes in abundance, but richness estimates were similar. As B. longimanus continues tospread across lake landscapes, we expect it will have profound impacts on local and regional richness and species distributionpatterns.

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DOI10.1139/F06-105
DESC Association: 
author or co-author