Changes in the Trophic Status of Three Mountain Lakes – Natural or Anthropogenic Process?
Elwira Sienkiewicz, Michał Gąsiorowski
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Institute of Geological Sciences, Polish Academy of Sciences, Warsaw Research Center,
Twarda 51/55, 00-818 Warszawa, Poland
Pol. J. Environ. Stud. 2014;23(3):875–892
Three sediment cores have been studied from the Morskie Oko (MOK), Przedni Staw Polski (PSP), and Czarny Staw Gąsienicowy (CSG) lakes to examine the recent environmental history of the alpine lakes located in the Polish part of the Tatra Mountains (Carpathians). Changes in the total phosphorus concentration in the water over the past centuries were reconstructed based on diatom data (DI-TP), assuming that diatoms are good indicators of productivity in lakes. The results of the analysis showed significant alterations in the trophic status of the studied lakes over the past 50 years. Clear changes from oligotrophy to mesotrophy occurred in the lakes located close to year-round mountain huts on the shores of MOK and PSP. In contrast, DI-TP decreased in CSG, and the only symptom of higher productivity in the lake was an increase in total organic carbon.