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Invasive Predator, Bythotrephes, has Varied Effects on Ecosystem Function

Summary: Invasive Predator, Bythotrephes, has
Varied Effects on Ecosystem Function
in Freshwater Lakes
Angela L. Strecker1,2
* and Shelley E. Arnott1
Department of Biology, Queen's University, 116 Barrie St., Kingston, Ontario, Canada K7L 3N6; 2
Present address: Department of
Ecology & Evolutionary Biology, University of Toronto, 25 Harbord St., Toronto, Ontario, Canada M5S 3G5
Bythotrephes longimanus is an invertebrate predator
that has invaded the North American Great Lakes
and a number of inland lakes, where it preys on
crustacean zooplankton. We examined the effect of
Bythotrephes on two measures of ecosystem function
during a four-month observational study of fresh-
water lakes on the boreal shield. Bythotrephes-in-
vaded lakes had significantly lower epilimnetic
zooplankton abundance and production compared
to reference lakes. On average, Bythotrephes con-


Source: Arnott, Shelley - Department of Biology, Queen's University (Kingston)


Collections: Environmental Sciences and Ecology; Biology and Medicine