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|Language of final thesis:||Slovak|
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|Title of the thesis:||The assessment of aquatic habitat quality of mountain and piedmont streams|
|Summary:||Dissertation thesis follows on research in the field of aquatic habitat quality of streams, performed since 1995 by Department of Land and Water Resources Management. One of the main objectives of the thesis was to analyse the quality of aquatic habitat of water biotopes in mountain and piedmont streams by using The Instream Flow Incremental Methodology (IFIM). The assessment of the quality of microhabitats in this methodology is based on bioindication by suitability curves. In this case, the brown trout (Salmo trutta m. fario) was chosen as a bioindicator. 59 reference reaches of 43 mountain streams in Slovakia have been thoroughly evaluated since 1995. The measurements were performed in the summer time during the minimal flows. In this period, the life conditions for brown trout are not favourable and whole quality of streams is determined by parameters and position of microhabitats. The rest parts of streams were analysed only for availability of fish migration. From the statistical analyses of each one parameter of microhabitats the correlations were created, which were used for generalization of methodology for evaluation of quality of aquatic habitat in streams. The comparison of results with IFIM methodology indicated that the designed methodology provides good results for evaluation of quality of water streams.
The results helped in generalization of evaluation of quality of aquatic habitat in mountain and piedmont rivers mainly in periods of minimal flows. Developed relationship between observed parameters is easily applicable in the practise. The applying of this relationship can be used in design of restoration measurements in rivers, or in evaluation of current state of water streams.
|Key words:||quality of aquatic habitat, The System for Environmental Flow Analysis (SEFA), Area Weighted Suitability (AWS), brown trout, IFIM|
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