The theory and practice in making decisions on classic and non-classic syntaxonomical analysis

Abstract

The authors distinguish two variants of syntaxono­mical analysis. The first one is a classical analysis with creation the complete syntaxonomical hierarchy. The second variant is non-classical analysis based on the “deductive” method of vegetation classification by K. Kopečky and S. Hejny. It has the reduced syntaxono­mical hierarchy. The principal ways in making synta­xonomical decisions on classical analysis are formu­lized as fol­lows: classical dichotomy, the usage of absence criteria, overlapping of diagnostic combi­nations, and etc. The rules for distinguishing of basal and derivate plant communities which have the transi­tional features, referring them to one or two higher units, are formulated. It is emphasized that the “deduc­tive” method is the most acceptable for classification of synanthropic serial vegetation with low species richness.