How a river course influences the species richness and ecological requirements on two opposite riverbanks in a forest area

摘要: The goal of the present research was to find correlations between topographic attributes a river valley and local ground-floor vegetation its habitat requirements expressed by ecological indicator values (EIV), using geographical information systems (GIS), digital elevation model (DEM), multivariate statistical analysis. We paid special attention course, which determines differentiation in slope aspects amount solar radiation reaching ground surface. object an almost latitudinal, ca. 4-km-long break section Sopot river, crossing escarpment zone Central Roztocze Highlands, southeastern Poland. main material comprised species lists (with estimated abundance) for each 200-m-long section, according separately left right riverbanks, 40 sections altogether, 15 000 records, physical chemical soil measurements. A 3-meter resolution DEM derived from 1:10 map. calculated valley, richness, EIVs all recognized valley. found 241 herb plant study area. did not significant differences two riversides (61 ±13 per one 63 ±17 side). Thus, parallel course does change richness on more “sunny” “shiny” riverbank. However, this factor “cooperating” with other significantly differentiates shape showing various basic resources: light, moisture, trophy, reaction, dispersion, organic-matter content.