Features of ecological differentiation of halophytic, steppe and petrophytic vegetation in the valley of the Liman Kuyalnik (Odesa Oblast)

摘要: Assessment of key environmental factors that influence vegetation distribution and formation plant communities is one the most important challenges in modern phytocenology. Nowadays, several bioindication systems are applied to determine ecological specificity establish leading for their differentiation. The system widely used Europe, H. Ellenberg, contains a numerical score on 6 factors. On example valley Liman Kuyalnik, Y. Didukh developed synphytoindication method based evaluation phytocenoses with respect 12 ecological factors: 7 edaphic 5 climatic factors; determines more accurate complete presentation analysis. In Kuyalnik (Odesa Oblast) largest area covered halophytic steppe vegetation. Halophytic (Therosalicornietea, Festuco-Puccinellietea classes, Juncetea maritimi, Bolboschoenetea maritimi) predominated shoreline areas valley, whereas (Festuco-Brometea) petrophytic (Sedo-Scleranthetea) dominated slope sites. With application DCA-ordination methods it was established hyper-space conditions strongly correlated factors, microclimatic (light intensity) (thermo-regime) had somewhat less Water regime level soil salinity served as syntaxa vegetation; moisture variability salt regime, well carbonate content were vegetation, thermo-regime main factor petrophytic-steppe "eco-spaces" these groups largely overlap. cenoses characterized by quite wide ranges Steppe show much diversity. liman, all stenotopicity relation complexly diversity biotopes within which unique require protection taking appropriate measures, depending changes activity or another limiting factor. state disaster. relationships differentiation will be further monitoring biodiversity state, preservation possible restoration types native this territory.