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dc.contributor.authorEloranta, Antti
dc.contributor.authorKjærstad, Gaute
dc.contributor.authorPower, Michael
dc.contributor.authorLakka, Hanna-Kaisa
dc.contributor.authorArnekleiv, Jo Vegar
dc.contributor.authorFinstad, Anders Gravbrøt
dc.coverage.spatialCentral Nowayen_US
dc.description.abstractChemical eradication of non-native species has become a widely used method to mitigate the potential negative im- pacts of altered competitive or predatory dynamics on biodiversity and natural ecosystem processes. However, the re- sponses of non-target species can vary from rapid full recovery to delayed or absent recolonization, and little is known about the potential shifts in resource use and trophic diversity of native species following chemical treatments. We used a before-after-control-impact approach to study the effects of rotenone piscicide treatment on abundance and tro- phic niche of benthic invertebrates in three untreated and three treated lakes in central Norway, the latter group hosting non-native roach (Rutilus rutilus) and pike (Esox lucius) prior to rotenone treatment. Based on community com- position data, the relative abundance of invertebrate grazers and collectors decreased while that of predators increased following fish removal in the treated lakes. The stable isotope data indicated minor shifts in resource use of, and tro- phic diversity among, benthic invertebrate communities. While the predatory dragonfly larvae (Odonata) and grazer snails (Lymnaeidae) showed increased δ13C values indicating increased reliance on littoral benthic algae, the collector mayfly larvae (Leptophlebia) showed decreased δ13C values following fish removal in treated lakes. Grazer snails also showed a shift to a lower trophic position, while the predatory dragonflies and collector mayflies showed no changes in δ15N values following fish removal. The community-level isotopic niches of benthic invertebrates showed no consis- tent changes, although the sample-size corrected and Bayesian estimates of standard ellipse areas (SEAC and SEAB) slightly increased in two of the three treated lakes due to an increased range in δ15N. In conclusion, our study findings indicate some changes in species assemblages but minor shifts in the resource use and trophic diversity of benthic in- vertebrate communities following fish removal in rotenone treated lakes Chemical eradication Community dynamics Food web Rotenone Species interactions Stable isotope analysisen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.subjectChemical eradicationen_US
dc.subjectCommunity dynamicsen_US
dc.subjectFood weben_US
dc.subjectSpecies interactionsen_US
dc.subjectStable isotope analysisen_US
dc.titleImpacts of piscicide-induced fish removal on resource use and trophic diversity of lake invertebratesen_US
dc.title.alternativeImpacts of piscicide-induced fish removal on resource use and trophic diversity of lake invertebratesen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2022 The Authorsen_US
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480en_US
dc.subject.nsiVDP::Zoology and botany: 480en_US
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480en_US
dc.subject.nsiVDP::Zoology and botany: 480en_US
dc.source.journalScience of the Total Environmenten_US
dc.relation.projectAndre: Municipality of Trondheimen_US
dc.relation.projectNorges forskningsråd: 243910en_US

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal