Can fish introductions alter nutrient cycles in previously fishless high-latitude lakes?

Show simple item record Milardi, Marco Lappalainen, Jyrki McGowan, Suzanne Weckström, Jan 2017-04-07T21:16:36Z 2017-04-07T21:16:36Z 2017
dc.identifier.citation Milardi , M , Lappalainen , J , McGowan , S & Weckström , J 2017 , ' Can fish introductions alter nutrient cycles in previously fishless high-latitude lakes? ' , Journal of Limnology , vol. 76 , no. 1 , pp. 1-14 .
dc.identifier.other PURE: 82417842
dc.identifier.other PURE UUID: fbad3e52-a5fd-4076-8f65-bd6b3f4cceae
dc.identifier.other WOS: 000396708700001
dc.identifier.other Scopus: 85011708727
dc.identifier.other ORCID: /0000-0002-4631-3788/work/40635099
dc.identifier.other ORCID: /0000-0001-5604-617X/work/40635121
dc.description.abstract The additional input and enhanced cycling of nutrients derived from introduced fish can be a significant factor altering nutrient dynamics in oligotrophic lakes. To test this, we used a bioenergetic model to estimate the fish-derived nutrient load in Lake Kuutsjurvi, a historically fishless boreal lake of northern Fennoscandia. The lake was selected because of the absence of other anthropogenic stressors, a known stocking history and the possibility of quantitatively estimating the size-structure and biomass of the fish population through a mass removal. Subsequently, we used a mass balance model to compare fish-derived nutrients with other nutrient load pathways. For comparison over longer timescales, we used lake sediment records of diatoms, chlorophyll and carotenoid pigments, C: N ratios and stable isotopes to infer whether fish introduction produced detectable changes in the lake trophic state, primary productivity and terrestrial nutrient input. Based on the nutrient mass balance model, we found that phosphorus and nitrogen derived from fish were 0.46% and 2.2%, respectively, of the total load to the lake, suggesting that fish introduction could not markedly increase the nutrient load. Accordingly, the palaeolimnological record indicated little increase in primary production but instead a shift from pelagic to benthic production after fish introduction. en
dc.format.extent 14
dc.language.iso eng
dc.relation.ispartof Journal of Limnology
dc.rights cc_by_nc
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Nutrient cycle
dc.subject bioenergetic model
dc.subject fish introduction
dc.subject chlorophyll and carotenoid pigments
dc.subject diatoms
dc.subject stable isotopes
dc.subject FOOD WEBS
dc.subject ALPINE LAKES
dc.subject REGIME SHIFTS
dc.subject FLUSHED LAKE
dc.subject SPRING BLOOM
dc.subject BROWN TROUT
dc.subject 1181 Ecology, evolutionary biology
dc.title Can fish introductions alter nutrient cycles in previously fishless high-latitude lakes? en
dc.type Article
dc.contributor.organization Environmental Sciences
dc.contributor.organization Environmental Change Research Unit (ECRU)
dc.description.reviewstatus Peer reviewed
dc.relation.issn 1129-5767
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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