caa a22 4500 445891548 CHVBK 20180317145618.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s10750-011-0898-7 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0898-7 Paleolimnological reconstruction of the trophic state in Lake Balaton (Hungary) using Cladocera remains [Elektronische Daten] [János Korponai, Katalin Varga, Timea Lengré, István Papp, Albert Tóth, Mihály Braun] The sediment of Lake Balaton (Hungary) provides important information about the lake's history, particularly with regard to eutrophication. In this study, we used fossil pigment analysis and subfossil Cladocera remains preserved in a dated sediment core to identify trophic stages from ~250bc to present. Dates of the most recent eutrophic events are in good agreement with previously published data. In general, the abundance and diversity of the Cladocera community increased with eutrophication and decreased with oligotrophication. The sediments of Lake Balaton were characterised by Chydoridae remains, of which Alona species were the most abundant. Of these, Alona quadrangularis and Alona affinis accounted for 40 and 20% of the total Cladocera remains, respectively. The trophic state of Lake Balaton varied between mesotrophic and eutrophic regimes. Seven different trophic periods were identified in Lake Balaton on the basis of Sedimentary Pigment Degradation Unit (SPDU) content of the sediment. Eutrophic states were (1) from ~250 to ~30bc, (3) between ~300 and ~590ad, (5) between 1834 and 1944 and (7) from the 1960s until present. Mesotrophic states were (2) ~30bc to ~300ad, (4) 590-1834, (6) 1944-1960s. Discriminant analysis of the cladoceran data confirmed these historic events, except for the short mesotrophic episode between 1944 and 1960. The first stage of eutrophication of Lake Balaton (~250 to ~30bc) was characterised by extensive macrophyte vegetation, as indicated by the increasing abundance of vegetation-associated Cladocera species (Eurycercus lamellatus, Sida crystallina, Pleuroxus sp.). Intensification of eutrophication was identified since the 1980s, reflected by a high abundance of Bosmina species. The most significant planktivorous fish of Lake Balaton was the Sabre carp (Pelecus cultratus), and when its number decreased, the abundance of Bosmina species increased. This study shows that Cladocera are responsive to trophic state changes, underlining their importance as a tool for the assessment of lake eutrophication. Springer Science+Business Media B.V., 2011 Bosmina nationallicence Cladocera remains nationallicence Chydoridae nationallicence Eutrophication nationallicence Fish nationallicence Lake Balaton nationallicence Shallow lake nationallicence Korponai János West-Transdanubian District Water Authority, Csik F. str. 4, 8360, Keszthely, Hungary aut Varga Katalin Department of Chemistry and Environmental Sciences, University of West Hungary, Károly Gáspár tér 4, 9700, Szombathely, Hungary aut Lengré Timea Department of Chemistry and Environmental Sciences, University of West Hungary, Károly Gáspár tér 4, 9700, Szombathely, Hungary aut Papp István Department of Mineralogy and Geology, University of Debrecen, P.O. Box 4, 4010, Debrecen, Hungary aut Tóth Albert Department of Hydrobiology, University of Debrecen, P.O. Box 71, 4010, Debrecen, Hungary aut Braun Mihály Department of Inorganic and Analytical Chemistry, University of Debrecen, P.O. Box 21, 4010, Debrecen, Hungary aut Hydrobiologia Springer Netherlands 676/1(2011-11-01), 237-248 0018-8158 676:1<237 2011 676 10750 https://doi.org/10.1007/s10750-011-0898-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0898-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Korponai János West-Transdanubian District Water Authority, Csik F. str. 4, 8360, Keszthely, Hungary aut NATIONALLICENCE 700 1- Varga Katalin Department of Chemistry and Environmental Sciences, University of West Hungary, Károly Gáspár tér 4, 9700, Szombathely, Hungary aut NATIONALLICENCE 700 1- Lengré Timea Department of Chemistry and Environmental Sciences, University of West Hungary, Károly Gáspár tér 4, 9700, Szombathely, Hungary aut NATIONALLICENCE 700 1- Papp István Department of Mineralogy and Geology, University of Debrecen, P.O. Box 4, 4010, Debrecen, Hungary aut NATIONALLICENCE 700 1- Tóth Albert Department of Hydrobiology, University of Debrecen, P.O. Box 71, 4010, Debrecen, Hungary aut NATIONALLICENCE 700 1- Braun Mihály Department of Inorganic and Analytical Chemistry, University of Debrecen, P.O. Box 21, 4010, Debrecen, Hungary aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 676/1(2011-11-01), 237-248 0018-8158 676:1<237 2011 676 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer