Groups of Coupled Species in the Vegetation Cover in the Landscapes of the Basins of the Upper and Middle Courses of the Pechora River as Indicators of Ecotopic and Phytocenotic Conditions

摘要

Analysis of the intraspecific coupling and use of the graph theory in the vegetation cover of the landscapes of the upper and middle courses of the Pechora River were used to distinguish seven groups of species of vascular plants. With the help of ecological scales of H. Ellenberg and participation coefficient of V. S. Ipatov we showed that these groups occupy different positions in the ecological space and are characterized by clear cenotic role in certain vegetation communities. The Pleiades of coupled species, the majority of which are interpreted as ecological-cenotic groups of species, can be used as indicators of eco- and biotopic conditions.