title: Factors and Mechanisms Affecting Seasonal Changes in the Prevalence of Microbiological Indicators of Water Quality and Nutrient Concentrations in Waters of the Białka River Catchment, Southern Poland.
abstract: This 3-year study was aimed to understand the factors and mechanisms that cause the temporal changes in the concentration of microbiological indicators of water quality and nutrient concentration in selected sites of the Białka river catchment (southern Poland) situated in direct vicinity of the largest ski station in the region. The analysis comprised 35 sampling campaigns conducted in five sites. Water temperature, pH, and electrical conductivity were measured during sampling, laboratory analyses included determination of the selected nutrients content (NH4, NO3, NO2, PO4); and the number of mesophilic and psychrophilic bacteria, coliforms, fecal coliforms, andEscherichia coli. Based on the cluster analysis, the collected samples were grouped into three to four groups, depending on the most characteristic features. Seasonal variation was evident, showing the predominance of either anthropogenic or natural-environment factors, depending on the considered season. On the other hand, principal component analysis revealed clear effect of various forms of land use in different sites.
authors.affiliation: Department of Microbiology, University of Agriculture in Cracow, Mickiewicza Ave. 24/28, 30-059 Cracow, Poland.
authors.forename: Anna
authors.identifier: 0000-0003-3655-7567
authors.initials: A
authors.lastname: Lenart-Boroń
authors.affiliation: Department of Hydrology, Institute of Geography and Spatial Management, Jagiellonian University in Cracow, Gronostajowa 7, 30-387 Cracow, Poland.
authors.forename: Anna A
authors.initials: AA
authors.lastname: Wolanin
authors.affiliation: Department of Hydrology, Institute of Geography and Spatial Management, Jagiellonian University in Cracow, Gronostajowa 7, 30-387 Cracow, Poland.
authors.forename: Łukasz
authors.initials: Ł
authors.lastname: Jelonkiewicz
authors.affiliation: Department of Hydrology, Institute of Geography and Spatial Management, Jagiellonian University in Cracow, Gronostajowa 7, 30-387 Cracow, Poland.
authors.forename: Mirosław
authors.initials: M
authors.lastname: Żelazny
keywords: Coliforms; Escherichia coli; Land use; Nutrients; Temporal changes