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Relationships between fisheries, foodweb structure, and detrital pathway in a large shallow lake

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dc.contributor.authorCremona, Fabien
dc.contributor.authorJärvalt, Ain
dc.contributor.authorBhele, Upendra
dc.contributor.authorTimm, Henn
dc.contributor.authorSeller, Siim
dc.contributor.authorHaberman, Juta
dc.contributor.authorZingel, Priit
dc.contributor.authorAgasild, Helen
dc.contributor.authorNõges, Peeter
dc.contributor.authorNõges, Tiina
dc.contributor.departmentCentre for Limnology. Institute of Agricultural and Environmental Sciences. Estonian University of Life Scienceseng
dc.date.accessioned2022-10-28T12:25:14Z
dc.date.available2022-10-28T12:25:14Z
dc.date.issued2018
dc.description.abstractWe modeled energy transfer and trophic position of fish, plankton, and macroinvertebrates and the relative importance of top-down versus bottom-up processes in Lake Võrtsjärv, a large shallow eutrophic lake in Estonia (northeastern Europe). We employed input values based on 37 years of biomass and fishing activity monitoring for calibrating the Ecopath with Ecosim (EwE) model. Energy flows from primary producers and detritus, represented by total system throughput, were nearly equal (51 and 49%, respec- tively). Simulation revealed that top-down and bot- tom-up forces were at play, metazooplankton was not efficiently grazing phytoplankton production, and a trophic cascade proceeded through macroinverte- brates rather than through zooplankton. Detritivory was responsible for the relatively low trophic position of Võrtsjärv fish compared to other lakes. Bottom-up processes were the main drivers for the dual, primary production- and detritus-based pathways in energy flow. Our findings suggest that the predicted biomass increase of cyanobacteria in shallow lakes in the future will strengthen the reliance of consumers on the detrital pathway at the expense of the primary production pathway.eng
dc.description.abstractThis research was supported by the Start-Up Personal Research Grant PUT 777 to FC and UB, by IUT 21-2 of the Estonian Ministry of Education and Research, and by MARS project (Managing Aquatic ecosystems and water Resources under multiple Stress) funded under the 7th EU Framework Programme, Theme 6 (Environment including Climate Change), Contract No.: 603378 (http://www.mars-project.eu).eng
dc.description.sponsorshipThis research was supported by the Start-Up Personal Research Grant PUT 777 to FC and UB, by IUT 21-2 of the Estonian Ministry of Education and Research, and by MARS project (Managing Aquatic ecosystems and water Resources under multiple Stress) funded under the 7th EU Framework Programme, Theme 6 (Environment including Climate Change), Contract No.: 603378 (http://www.mars-project.eu).eng
dc.identifier.issn1573-5117
dc.identifier.publicationHydrobiologia (2018) 820:145–163eng
dc.identifier.urihttp://hdl.handle.net/10492/7804
dc.identifier.urihttps://doi.org/10.1007/s10750-018-3648-2
dc.publisherSpringer
dc.rights© 2018, Springer International Publishing AG, part of Springer Nature
dc.subjectEcopath modeleng
dc.subjectdetrituseng
dc.subjectpiscivorous fisheng
dc.subjectbottom-upeng
dc.subjecttrophic cascadeeng
dc.subjectCyanobacterialat
dc.subjectarticleseng
dc.titleRelationships between fisheries, foodweb structure, and detrital pathway in a large shallow lakeeng
dc.typeArticleeng
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