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Summary: ORIGINAL PAPER
Patterns of Bythotrephes longimanus distribution relative
to native macroinvertebrates and zooplankton prey
Anneli Jokela · Shelley E. Arnott ·
Beatrix E. Beisner
Received: 22 June 2010 / Accepted: 20 January 2011 / Published online: 12 August 2011
Ó Springer Science+Business Media B.V. 2011
Abstract As exotic species are introduced and
spread across a heterogeneous landscape, the abun-
dance and richness of potential competitor and prey
species they encounter will vary. Little is known about
the interactions between Bythotrephes longimanus and
native predatory macroinvertebrates (e.g., Mysis,
Chaoborus), which potentially limit the establishment
and spread of the invader. An 80-lake survey was
conducted in the summer of 2007 to obtain macroin-
vertebrate abundances across invaded and non-invaded
lakes. A subset (15) of these lakes was surveyed more
intensively to obtain stratified daytime and night-time
distributions of the organisms. Overall co-occurrence
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