ECOLOGICAL-CENOTIC STRUCTURE OF RARE FLORA FRACTION IN THE KABARDINO-BALKAR REPUBLIC
The analysis of the species ecological-cenotic confinedness in the respective communities allows to reveal the ecological plasticity of the species and its stability in the community, as well as the ecobiomorphological nature of the individual. The study site: the Kabardino-Balkar republic. The article analyzes the ecological and cenotic structure of the rare flora fraction of Kabardino-Balkaria. First and foremost, when assigning plant species to the ecological-cenotic group, the species occurrence in a particular cenotic group or community was taken into account. For the rare fraction of the KBR flora, we identified 7 types of flora complexes and 18 subtypes associated with large plant types (forests, meadows, etc.) and with specific vegetation that develops in special environmental conditions (wetlands, petrophytes, uremic). In particular, the wetland floristic complex includes 18 (7,1%) rare species from 11 genera and 8 families, of which 3 species are listed in the Red Book of the Kabardino-Balkar republic. In the steppe floristic complex there are 28 (11,2%) from 15 genera and 14 families. Among them there are the rarest «Red Book» species: Adonis vernalis L., Paeonia tenuifolia L., species of the genus Tulipa L., as well as probably disappeared from these complexes Papaver bracteatum Lindl. The forest floristic complex combines 57 species (22,6%) from 41 genera and 33 families with relict species such as Pachyphragma macrophyllum (Hoffm.), Phyllitis scolopendrium L., Helleborus caucasicus A. Br., as well as Ostrya carpinifolia Scop., Acer trautvetteri Medw. The petrophytic floristic complex includes 87 (34,5%) species from 59 genera and 51 families, among which the rarest endemic species are Daphne baksanica Pobed., Cicer balkharica Galushko, Jurinea dolomitica Galushko, Leontodon tlostanovii Schakh. The meadow flora complex comprises 40 (15,3%) species from 24 genera and 18 families, including Cephalaria balkharica E. Busch. The numeric composition of the uremic flora complex is insignificant due to the substrate lability. There are 20 (8,0%) indifferent species from 17 genera and 15 families. Most often it is elective petrophytes.