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dc.contributor.authorTaipale, Sami J.
dc.contributor.authorVuorio, Kristiina
dc.contributor.authorAalto, Sanni L.
dc.contributor.authorPeltomaa, Elina
dc.contributor.authorTiirola, Marja
dc.date.accessioned2019-11-26T08:37:04Z
dc.date.available2019-11-26T08:37:04Z
dc.date.issued2019
dc.identifier.citationTaipale, S. J., Vuorio, K., Aalto, S. L., Peltomaa, E., & Tiirola, M. (2019). Eutrophication reduces the nutritional value of phytoplankton in boreal lakes. <i>Environmental Research</i>, <i>179</i>(Part B), Article 108836. <a href="https://doi.org/10.1016/j.envres.2019.108836" target="_blank">https://doi.org/10.1016/j.envres.2019.108836</a>
dc.identifier.otherCONVID_33369134
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/66516
dc.description.abstractEutrophication (as an increase in total phosphorus [TP]) increases harmful algal blooms and reduces the proportion of high-quality phytoplankton in seston and the content of ω-3 long-chain polyunsaturated fatty acids (eicosapentaenoic acid [EPA] and docosahexaenoic acid [DHA]) in fish. However, it is not well-known how eutrophication affects the overall nutritional value of phytoplankton. Therefore, we studied the impact of eutrophication on the production (as concentration; μg L−1) and content (μg mg C−1) of amino acids, EPA, DHA, and sterols, i.e., the nutritional value of phytoplankton in 107 boreal lakes. The lakes were categorized in seven TP concentration categories ranging from ultra-oligotrophic (<5 μg L−1) to highly eutrophic (>50 μg L−1). Phytoplankton total biomass increased with TP as expected, but in contrast to previous studies, the contribution of high-quality phytoplankton did not decrease with TP. However, the high variation reflected instability in the phytoplankton community structure in eutrophic lakes. We found that the concentration of amino acids increased in the epilimnion whereas the concentration of sterols decreased with increasing TP. In terms of phytoplankton nutritional value, amino acids, EPA, DHA, and sterols showed a significant quadratic relationship with the lake trophic status. More specifically, the amino acid contents were the same in the oligo- and mesotrophic lakes, but substantially lower in the eutrophic lakes (TP > 35 μg L−1/1.13 μmol L−1). The highest EPA and DHA content in phytoplankton was found in the mesotrophic lakes, whereas the sterol content was highest in the oligotrophic lakes. Based on these results, the nutritional value of phytoplankton reduces with eutrophication, although the contribution of high-quality algae does not decrease. Therefore, the results emphasize that eutrophication, as excess TP, reduces the nutritional value of phytoplankton, which may have a significant impact on the nutritional value of zooplankton, fish, and other aquatic animals at higher food web levels.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofseriesEnvironmental Research
dc.rightsCC BY-NC-ND 4.0
dc.subject.othernutritional ecology
dc.subject.otherfreshwater food webs
dc.subject.otherfatty acids
dc.subject.othersterols
dc.subject.otheramino acids
dc.subject.othercryptophytes
dc.subject.othereutrophication
dc.titleEutrophication reduces the nutritional value of phytoplankton in boreal lakes
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201911265004
dc.contributor.laitosBio- ja ympäristötieteiden laitosfi
dc.contributor.laitosDepartment of Biological and Environmental Scienceen
dc.contributor.oppiaineAkvaattiset tieteetfi
dc.contributor.oppiaineYmpäristötiedefi
dc.contributor.oppiaineAquatic Sciencesen
dc.contributor.oppiaineEnvironmental Scienceen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.description.reviewstatuspeerReviewed
dc.relation.issn0013-9351
dc.relation.numberinseriesPart B
dc.relation.volume179
dc.type.versionpublishedVersion
dc.rights.copyright© 2019 The Authors. Published by Elsevier Inc.
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber615146
dc.relation.grantnumber615146
dc.relation.grantnumber323063
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/615146/EU//
dc.subject.ysojärvet
dc.subject.ysorasvahapot
dc.subject.ysoaminohapot
dc.subject.ysomikrolevät
dc.subject.ysoravintoketjut
dc.subject.ysoravinnekierto
dc.subject.ysoplankton
dc.subject.ysosterolit
dc.subject.ysorehevöityminen
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p9374
jyx.subject.urihttp://www.yso.fi/onto/yso/p4800
jyx.subject.urihttp://www.yso.fi/onto/yso/p9530
jyx.subject.urihttp://www.yso.fi/onto/yso/p26977
jyx.subject.urihttp://www.yso.fi/onto/yso/p12241
jyx.subject.urihttp://www.yso.fi/onto/yso/p22936
jyx.subject.urihttp://www.yso.fi/onto/yso/p3053
jyx.subject.urihttp://www.yso.fi/onto/yso/p4360
jyx.subject.urihttp://www.yso.fi/onto/yso/p11509
dc.rights.urlhttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.relation.doi10.1016/j.envres.2019.108836
dc.relation.funderEuroopan komissiofi
dc.relation.funderSuomen Akatemiafi
dc.relation.funderEuropean Commissionen
dc.relation.funderAcademy of Finlanden
jyx.fundingprogramEU:n 7. puiteohjelma (FP7)fi
jyx.fundingprogramAkatemiahanke, SAfi
jyx.fundingprogramFP7 (EU's 7th Framework Programme)en
jyx.fundingprogramAcademy Project, AoFen
jyx.fundinginformationThis research was supported by the Academy of Finland research grant 276268 awarded to EP, 263472 and 311229 awarded to KV, and 323063 awarded to MT, and European Research Council (ERC) CoG project 615146 awarded to MT.


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