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dc.contributor.authorBøhn, Thomas
dc.contributor.authorAmundsen, Per-Arne
dc.date.accessioned2020-09-29T10:13:00Z
dc.date.available2020-09-29T10:13:00Z
dc.date.issued1998-02-01
dc.description.abstract<p>Species composition and body-size distribution were studied in the crustacean zooplankton communities of two limnologically similar lake localities situated 50 km apart in the Pasvik River System, northern Norway. A recent invasion and successive downstream expansion of vendace (<i>Coregonus albula</i>), a specialized zooplanktivorous fish, allowed comparisons between sites with different predation pressures. Vendace had established a high population density and was the dominant fish species in the pelagic of the upper locality, but had just invaded the lower locality with a small number of individuals. Whitefish (<i>Coregonus lavaretus</i>), a closely related but less specialized zooplanktivore species, dominated the native fish community of both lakes. <p>The zooplankton community of the upper locality was in June and August dominated by <i>Bosmina longirostris</i>, the smallest zooplankton species represented in the watercourse, and in September by <i>Daphnia cristata</i>. The lower locality was dominated by the larger <i>Holopedium gibberum</i> and <i>Eudiaptomus graciloides</i> in June, by <i>D. cristata</i> in August, and by <i>D. cristata</i> and <i>B. longirostris</i> in September. The mean body size of the three most abundant cladoceran species was significantly smaller in the upper locality, compared to the lower locality. It was concluded that the invasion and establishment of a dense vendace population in the upper locality had increased the predation pressure in the pelagic, resulting in a reduction of body size and a shift towards smaller species in the zooplankton community.en_US
dc.descriptionThis is a pre-copyedited, author-produced version of an article accepted for publication in the <i>Journal of Plankton Research</i> following peer review. The version of record Bøhn, T. & Amundsen, P.-A. (1998). Effects of invading vendace (<i>Coregonus albula</i>) on species composition and body size in two zooplankton communities of the Pasvik River System, Northern Norway. <i>Journal of Plankton Research, 20</i>(2), 243-256, is available online at <a href=https://doi.org/10.1093/plankt/20.2.243>https://doi.org/10.1093/plankt/20.2.243</a>.en_US
dc.identifier.citationBøhn, T. & Amundsen, P.-A. (1998). Effects of invading vendace (<i>Coregonus albula</i>) on species composition and body size in two zooplankton communities of the Pasvik River System, Northern Norway. <i>Journal of Plankton Research, 20</i>(2), 243-256.en_US
dc.identifier.cristinIDFRIDAID 530814
dc.identifier.doi10.1093/plankt/20.2.243
dc.identifier.issn0142-7873
dc.identifier.issn1464-3774
dc.identifier.urihttps://hdl.handle.net/10037/19500
dc.language.isoengen_US
dc.publisherOxford University Pressen_US
dc.relation.journalJournal of Plankton Research
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 1998 Oxford University Pressen_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Limnology: 498en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Limnologi: 498en_US
dc.titleEffects of invading vendace (Coregonus albula) on species composition and body size in two zooplankton communities of the Pasvik River System, Northern Norwayen_US
dc.type.versionacceptedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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