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dc.contributor.authorNilsson, Anna
dc.contributor.authorL'Abee-Lund, Jan Henning
dc.contributor.authorVøllestad, Leif Asbjørn
dc.contributor.authorJerstad, Kurt
dc.contributor.authorLarsen, Bjørn Mejdell
dc.contributor.authorRøstad, Ole Wiggo
dc.contributor.authorSaltveit, Svein Jakob
dc.contributor.authorSkaugen, Thomas
dc.contributor.authorStenseth, Nils Christian
dc.contributor.authorWalseng, Bjørn
dc.date.accessioned2018-04-18T10:08:43Z
dc.date.available2018-04-18T10:08:43Z
dc.date.created2018-04-12T13:10:14Z
dc.date.issued2018
dc.identifier.issn2045-7758
dc.identifier.urihttp://hdl.handle.net/11250/2494674
dc.description.abstractInteractions between birds and fish are often overlooked in aquatic ecosystems. We studied the influence of Atlantic salmon and brown trout on the breeding population size and reproductive output of the white-throated dipper in a Norwegian river. Acidic precipitation led to the extinction of salmon, but salmon recolonized after liming was initiated in 1991. We compared the dipper population size and reproductive output before (1978–1992) and after (1993–2014) salmon recolonization. Despite a rapid and substantial increase in juvenile salmon, the breeding dipper population size and reproductive output were not influenced by juvenile salmon, trout, or total salmonid density. This might be due to different feeding strategies in salmonids and dippers, where salmonids are mainly feeding on drift, while the dipper is a benthic feeder. The correlation between the size of the dipper population upstream and downstream of a salmonid migratory barrier was similar before and after recolonization, indicating that the downstream territories were not less attractive after the recolonization of salmon. Upstream dipper breeding success rates declined before the recolonization event and increased after, indicating improved water quality due to liming, and increasing invertebrate prey abundances and biodiversity. Surprisingly, upstream the migratory barrier, juvenile trout had a weak positive effect on the dipper population size, indicating that dippers may prey upon small trout. It is possible that wider downstream reaches might have higher abundances of alternative food, rending juvenile trout unimportant as prey. Abiotic factors such as winter temperatures and acidic precipitation with subsequent liming, potentially mediated by preyabundance, seem to play the most important role in the life history of the dipper. birds, breeding, predators, river, salmonidsnb_NO
dc.language.isoengnb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.subjectbirdsnb_NO
dc.subjectbreedingnb_NO
dc.subjectpredatorsnb_NO
dc.subjectrivernb_NO
dc.subjectsalmonidsnb_NO
dc.titleThe potential influence of Atlantic salmon Salmo salar and brown trout Salmo trutta on density and breeding of the white-throated dipper Cinclus cinclusnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480nb_NO
dc.subject.nsiVDP::Zoology and botany: 480nb_NO
dc.source.journalEcology and Evolutionnb_NO
dc.identifier.doi10.1002/ece3.3958
dc.identifier.cristin1578980
dc.relation.projectAndre: Norwegian Water Resources and Energy Directoratenb_NO
dc.relation.projectNorges forskningsråd: 221393nb_NO
cristin.unitcode7511,3,0,0
cristin.unitcode7511,6,0,0
cristin.unitnameAvdeling for akvatisk økologi
cristin.unitnameOslo
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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