Abstract
The paper proposes a methodology of phytogeographical regionalisation using grassland vegetation data. The research area is located in the West Carpathians, in volcanic field with adjacent post-tectonic basins and valleys in the Central Slovakia. The applied techniques were variogram modelling, ordinary kriging and lattice wombling. Phi coefficient was used to determine the diagnostic species of proposed phytochoria (fidelity test). The 1978 unevenly distributed grassland polygons that comprised 1071 taxa of vascular plants were the subject of the analyses. Ecological indicator values for temperature (EITs), weighted by species coverage in the Tansley scale in each grassland polygon, were used for the modelling. The gradients in the surface of the indicator value produced by ordinary kriging were analyzed. The steepest gradients indicate the most radical changes in floristic composition typical of border locations.
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