engleski

Annual variation in water quality parameters on Plitvica stream, Plitvice Lakes National Park

Plitvica stream is a part of freshwater ecosystem of the Plitvice Lakes National Park in a unique way. It merges with the water from the lake system at its end, thus forming the river Korana. Its priceless value is that it forms the highest waterfall (78 meters high) in Croatia. Increasing anthropogenic influence in the past several years manifested in excesive construction of houses for tourism, and increasing use of water for drinking and sanitation. Conservaton Service has been conducting monthly water monitoring since 2012. on 2 locations, Plitvica spring and Plitvica stream after the settlement. In 2018 additional 4 locations have been added for the weekly monitoring of Plitvica stream thereby covering the entire watercourse. Basic physico-chemical parameters were measured on field, samples were collected in sterile bottles and microbiological analysis were performed within a few hours in Park's laboratory. The aim of this work was to establish how did the physico- chemical and microbiological parameters change during a period of 9 months in 2018, giving distinct spatial and seasonal distribution of the collected data. Interpretation of the data showed the influence of increasing anthropogenic pressure on sensitive balance of a small streams like Plitvica stream.

microbiological analysis ; stream ; anthropogenic pressure ; Plitvice Lakes National Park

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