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Response of primary producers to water level fluctuations of Lake Peipsi

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dc.contributor.authorMäemets, Helle
dc.contributor.authorLaugaste, Reet
dc.contributor.authorPalmik, Kadi
dc.contributor.authorHaldna, Marina
dc.contributor.departmentCentre for Limnology. Institute of Agricultural and Environmental Scienceseng
dc.date.accessioned2022-11-14T11:43:17Z
dc.date.available2022-11-14T11:43:17Z
dc.date.issued2018
dc.description.abstractThe amplitude of natural fluctuation between annual averages of the water level (WL) of Lake Peipsi (3555 km 2) is 1.5 m. A study aimed to examine the impact of WL fluctuations on phytoplankton, macrophytes, and their epiphyton was performed annually at littoral stations during 2005–2015. Also the characteristics of pelagic water were collated with the WL. Changes in littoral and pelagial phytoplankton were similar, with the exclusion of massive wind-caused accumulations of cyanobacteria in the littoral. At the lowest WL a significant increase occurred in (a) the biomass of phytoplankton and the share of phytoplankton-derived organic carbon in water and (b) the species richness and biomass of macrophytes, including submerged plants and macroalgae. The abundance of epiphytes did not reveal a clear relation with the WL. The ratios of biomasses in the years with the lowest and the highest average WL were 2.2 for Potamogeton spp. and 2.6 for phytoplankton. The assessment of ecological status at the minimum and the maximum WL differs at least by one quality class. Decisions about ecological status based on phytoplankton and large filamentous green algae at low water may be contrary to decisions based on macrophytes: high biomasses of phytoplankton and macroalgae indicate hypertrophic status, but species-rich macrovegetation and high biomasses of charophytes and elodeids are considered to be characteristic of meso- to eutrophic water bodies.eng
dc.description.abstractThis study was supported by the Estonian Target Financed Project SF0362483s03, by the Estonian State Monitoring Programme, and by the materials of the herbarium of the Department of Botany in the Institute of Agricultural and Environmental Sciences of the Estonian University of Life Sciences.eng
dc.description.sponsorshipThis study was supported by the Estonian Target Financed Project SF0362483s03, by the Estonian State Monitoring Programme, and by the materials of the herbarium of the Department of Botany in the Institute of Agricultural and Environmental Sciences of the Estonian University of Life Sciences.eng
dc.identifier.issn1736-7530
dc.identifier.publicationProceedings of the Estonian Academy of Sciences, 2018, 67, 3, 231–245eng
dc.identifier.urihttp://hdl.handle.net/10492/7830
dc.identifier.urihttps://doi.org/10.3176/proc.2018.3.06
dc.publisherEstonian Academy Publisherseng
dc.rightsCreative Commons Attribution NonCommercial 4.0 International License (CC BY-NC 4.0) ; openAccesseng
dc.rights© 2018 Authors.eng
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectlimnologyeng
dc.subjectwater leveleng
dc.subjectphytoplanktoneng
dc.subjectmacrophyteseng
dc.subjectepiphyteseng
dc.subjectbiomasseng
dc.subjectecological assessmenteng
dc.subjectarticleseng
dc.titleResponse of primary producers to water level fluctuations of Lake Peipsieng
dc.typeArticleeng

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