THE EFFECT OF ANTHROPOGENIC CHANGE IN THE STRUCTURE OF DIATOMS AND WATER QUALITY OF THE ŻOŁYNIANKA AND JAGIELNIA STREAMS
 
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1
Department of Agroecology, Faculty of Biology and Agriculture, University of Rzeszów, Ćwiklińskiej 1A, 35-601 Rzeszów, Poland
2
Department of Biological Foundations of Agriculture and Environmental Education, Faculty of Biology and Agriculture, University of Rzeszów, Zelwerowicza 8B, 35-601 Rzeszów, Poland
3
Department of Soil Studies, Environmental Chemistry and Hydrology, Faculty of Biology and Agriculture, University of Rzeszów, Zelwerowicza 8B, 35-601 Rzeszów, Poland
Publish date: 2015-02-08
 
J. Ecol. Eng. 2015; 16(2):33–51
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ABSTRACT
The studies on bentic diatoms were conducted in 2009–2011 at eight samplings sites over the Żołynianka stream and its tributary, the Jagielnia. 427 diatom taxa were recorded in total. Achnanthidium minutissimum var. minutissimum, Aulacoseira ambigua, Fragilaria capucina var. capucina, Gomphonema parvlum, Navicula gregaria, Nitzschia palea and Planothidium lanceolatum were dominant taxa in both watercourses. Chemical analysis of water showed high chemical status of water at most of sampling sites. The results of diatomaceous analysis conducted with OMNIDIA software revealed moderate and poor condition of water. The best water quality was recorded in the Jagielnia stream (good or moderate status). The values of the analyzed indices showed the worst water quality on the Żołynianka at site four, showing bad ecological status. TDI index deviated the most from the other two indices (IPS and GDI), always indicating poorer water quality.