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The impact of climate change and eutrophication on phosphorus forms in sediment: Results from a long-term lake mesocosm experiment

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dc.contributor.authorSaar, Katrin
dc.contributor.authorNõges, Peeter
dc.contributor.authorSøndergaard, Martin
dc.contributor.authorJensen, Maria
dc.contributor.authorJørgensen, Charlotte
dc.contributor.authorReitzel, Kasper
dc.contributor.authorJeppesen, Erik
dc.contributor.authorLauridsen, Torben L.
dc.contributor.authorJensen, Henning S.
dc.contributor.departmentCentre for Limnology. Estonian University of Life Scienceeng
dc.date.accessioned2022-05-10T08:01:39Z
dc.date.available2022-05-10T08:01:39Z
dc.date.issued2022
dc.descriptionArticle history: Received 3 December 2021; Received in revised form 16 January 2022; Accepted 4 February 2022; Available online 12 February 2022; Editor: Ouyang Weieng
dc.description.abstractCharacteristics of bottom sediments in lake mesocosms 11 years after starting the experiment were studied in order to determine the effects of nutrient loading, temperature increase and vegetation type on concentration and vertical dis- tribution of phosphorus (P) forms. The experimental setup consisted of 24 outdoor flow-through mesocosms with two nutrient treatments – low (L) and high (H) and 3 temperature levels – ambient (T0), heated by 2–4 °C (T1) and 3–6 °C (T2) in four replicates. Thickness of the organic sediment was measured and the sediment analysed for dry weight, or- ganic matter, and P fractions (according to a sequential extraction scheme) and organic P compounds (by ³¹P nuclear magnetic resonance spectroscopy). Higher nutrient loading led to increased sediment accumulation and higher con- centration of total P and most P fractions, except P bound to aluminium and humic matter. The dominant vegetation type covaried with nutrient levels. Vertical gradients in Ca bound P and mobile P in low nutrient mesocosms was per- haps a result of P coprecipitation with calcite on macrophytes and P uptake by roots indicating that in macrophyte-rich lakes, plants can be important modifiers of early P diagenesis. Temperature alone did not significantly affect sediment accumulation rate but the interaction effect between nutrient and temperature treatments was significant. At high nu- trient loading, sediment thickness decreased with increasing temperature, but at low nutrient loading, it increased with warming. The effect of warming on sediment composition became obvious only in nutrient enriched mesocosms showing that eutrophication makes shallow lake ecosystems more susceptible to climate change.eng
dc.description.abstractKatrin Saar study visit to SDU was supported by ESF DoRa Programme Activity 6 and SA Archimedes and by Centre for Lake Restoration, a Villum Centre of Excellence. Data analysis for the present paper was supported by the European Union H2020 WIDESPREAD grant 951963 (TREICLAKE) and by the Estonian Science Foundation grant PRG1167. Erik Jeppesen was supported by the TÜBITAK program BIDEB2232 (project 118C250), and Erik Jeppesen, Martin Søndergaard and Torben Lauridsen by the EU Horizon 2020 project AQUACOSMplus and AnaEE-Denmark. The authors thank two anonymous referees for constructive comments to the first version of the manuscript.eng
dc.description.abstractSupplementary data to this article can be found online at https://doi. org/10.1016/j.scitotenv.2022.153751.eng
dc.description.sponsorshipKatrin Saar study visit to SDU was supported by ESF DoRa Programme Activity 6 and SA Archimedes and by Centre for Lake Restoration, a Villum Centre of Excellence. Data analysis for the present paper was supported by the European Union H2020 WIDESPREAD grant 951963 (TREICLAKE) and by the Estonian Science Foundation grant PRG1167. Erik Jeppesen was supported by the TÜBITAK program BIDEB2232 (project 118C250), and Erik Jeppesen, Martin Søndergaard and Torben Lauridsen by the EU Horizon 2020 project AQUACOSMplus and AnaEE-Denmark. The authors thank two anonymous referees for constructive comments to the first version of the manuscript.eng
dc.identifier.issn0048-9697
dc.identifier.publicationScience of the Total Environment 825 (2022) 153751eng
dc.identifier.urihttp://hdl.handle.net/10492/7315
dc.identifier.urihttp://dx.doi.org/10.1016/j.scitotenv.2022.153751
dc.publisherElseviereng
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/951963/EU/TREICLAKE
dc.rights© 2022 Elsevier B.V. All rights reserved.eng
dc.subjectshallow lakeeng
dc.subjectsediment accumulationeng
dc.subjecttemperature gradienteng
dc.subjectnutrient loadeng
dc.subjectmacrophyteseng
dc.subject³¹P NMReng
dc.subjectsequential extractioneng
dc.subjectP-poolseng
dc.subjectarticleseng
dc.titleThe impact of climate change and eutrophication on phosphorus forms in sediment: Results from a long-term lake mesocosm experimenteng
dc.typeArticleeng
rioxxterms.freetoread.startdate12.02.2024

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