Long-term Nutrient Concentration Dataset (1985–2025) for the Siófok and Keszthely Basins of Lake Balatonhdl:21.15109/ARP/8LLWU4ARP2026-03-261Horváth, Hajnalka, 2026, "Long-term Nutrient Concentration Dataset (1985–2025) for the Siófok and Keszthely Basins of Lake Balaton", https://hdl.handle.net/21.15109/ARP/8LLWU4, ARP, V1Long-term Nutrient Concentration Dataset (1985–2025) for the Siófok and Keszthely Basins of Lake Balatonhdl:21.15109/ARP/8LLWU4Horváth, HajnalkaARPHorváth, HajnalkaHorváth, Hajnalka2026-03-06Earth and Environmental SciencesThis dataset contains measurements of total and dissolved nutrient concentrations (NH₄–N, NO₃–N, urea–N, TDN, TN, SRP, TDP, TP) collected in Lake Balaton between 1985 and 2025 (with significant gaps). The data represent monitoring results from two basins: the Siófok Basin (EOV X: 175982; EOV Y: 564770) and the Keszthely Basin (EOV X: 156046; EOV Y: 514651).Please contact the researcher via email and provide a detailed description of the intended use of the data for research purposes.<a href="http://creativecommons.org/licenses/by-nc-sa/4.0">CC BY-NC-SA 4.0</a>B. Somogyi, H. Li, K. Tapolczai, A. W. Kovács, L. G.-Tóth, H. Horváth, K. Krassován, A. Fodor-Kardos, and L. Vörös, “Regime shift in microalgal dynamics: Impact of water level changes on planktonic and benthic algal biomass,” SCIENCE OF THE TOTAL ENVIRONMENT, vol. 929, 2024. M. Présing, T. Preston, A. Takátsy, P. Sprőber, A. Kovács, L. Vörös, G. Kenesi, and I. Kóbor, “Phytoplankton nitrogen demand and the significance of internal and external nitrogen sources in a large shallow lake (Lake Balaton, Hungary),” HYDROBIOLOGIA, vol. 599, no. 1, pp. 87–95, 2008.https://doi.org/10.1007/978-1-4020-8379-2_10B. Somogyi, H. Li, K. Tapolczai, A. W. Kovács, L. G.-Tóth, H. Horváth, K. Krassován, A. Fodor-Kardos, and L. Vörös, “Regime shift in microalgal dynamics: Impact of water level changes on planktonic and benthic algal biomass,” SCIENCE OF THE TOTAL ENVIRONMENT, vol. 929, 2024. M. Présing, T. Preston, A. Takátsy, P. Sprőber, A. Kovács, L. Vörös, G. Kenesi, and I. Kóbor, “Phytoplankton nitrogen demand and the significance of internal and external nitrogen sources in a large shallow lake (Lake Balaton, Hungary),” HYDROBIOLOGIA, vol. 599, no. 1, pp. 87–95, 2008.Readme_N_and_P_forms_1985_2025_E.pdfenglish descriptionapplication/pdfReadme_N_and_P_forms_1985_2025_H.pdfhungarian descriptionapplication/pdfSummary1985-2025.csvdatasettext/comma-separated-values