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TREICLAKE

Selle valdkonna püsiv URIhttp://hdl.handle.net/10492/7299

"Towards Research Excellence and Innovation Capacity in Studing Lake Ecosystems Functional Structures and Climate Change Impact " (1.01.2021−31.12.2023); Principal investigator: Lea Tuvikene, Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, Chair of Hydrobiology and Fishery. Funder: European Commission

Sirvi

Sirvi TREICLAKE Märksõna "catchment model" järgi

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  • Pisipilt
    Kirje
    Nitrate as a predictor of cyanobacteria biomass in eutrophic lakes in a climate change context
    (Elsevier, 2022) Cremona, Fabien; Öğlü, Burak; McCarthy, Mark J.; Newell, Silvia E.; Nõges, Peeter; Nõges, Tiina; Chair of Hydrobiology and Fishery. Institute of Agricultural and Environmental Sciences. Estonian University of Life Science
    We aimed to predict cyanobacteria biomass and nitrate (NO₃) concentrations in Lake Võrtsjärv, a large, shallow, and eutrophic lake in Estonia. We used a model chain based on the succession of a mechanistic (INCA-N) model and an empirical, generalized linear model. INCA-N model calibration and validation was performed with long term climate and catchment parameters. We constructed twelve scenarios as combinations of climate forcing from the Intergovernmental Panel on Climate Change (IPCC, 3 scenarios), land conversion (forest to agriculture, 2 scenarios), and fertilizer use (2 scenarios).Models predicted 46% of the variance of cyanobacteria biomass and 65% of that of NO₃ concentrations. The model chain simulated that scenarios comprising both forest conversion to agricultural lands and a greater use of fertilizer per surface area unit would cause increases in lacustrine NO₃ (up to twice the historicalmean) and cyanobacteria biomass (up to a four-fold increase compared to the historical mean). The changes in NO₃ concentrations and cyanobacteria biomass were more pronounced in low and moderate warming scenarios than in high warming scenarios because of increased denitrification rates in a warmer climate. Our findings show the importance of reducing anthropogenic pressures on lake catchments in order to reduce harmful pollutant and microalgae proliferation, and highlight the counterintuitive effects of multiple stressor interactions on lake functioning.
  • Pisipilt ei ole saadaval
    Kirje
    Supplementary data to the article "Nitrate as a predictor of cyanobacteria biomass in eutrophic lakes in a climate change context"
    (Estonian University of Life Sciences, 2022) Cremona, Fabien; Öğlü, Burak; McCarthy, Mark J.; Newell, Silvia E.; Nõges, Peeter; Nõges, Tiina
    Supplementary material: empirical model terms for the biomass of cyanobacteria (VO_Bcyan) and nitrate concentration (VO_NO3) in Lake Võrtsjärv, using measured nitrate concentration of tributaries Väike Emajõgi (oVema_), Tänassilma (oTana_), Õhne (oOhne_) and Tarvastu (oTarv_).