Characteristics of coenopopulations of rare mountain and rocky species in Trans-Urals of Bashkortostan Republic

The results of studying ecological and biological features of four rare mountain and rocky species (Patrinia sibirica (L.) Juss., Sophianthe sibirica (L.) Tzvel., Anemonastrum biarmiense (Juz.) Holub andBupleurum multinerve DC.) in the northern part of the Trans-Urals of the Bashkortostan Republic and the analysis of a modern state of natural coenopopulations (CP) of these species are presented. The studied species of Asian origin in the Trans-Urals are on the western border of distribution, andfor endemics of the Urals Anemonastrum biarmiense here passes the southern limit of the area. The estimation of a phytocoenotic habitat of the coenopopulation has been carried out, a prevailing type ofvegetation of habitats ofspecies are rocky and mountain steppes with a high share of stoniness of the soil. The studied CP belongs to a normal uncompleted term. The centered spectrum is formed in CP Anemonastrum biarmiense (mountain Kurkak) and Bupleurum multinerve, Sophianthe sibirica where the peak is necessary on generative individuals; left-side in CP Anemonastrum biarmiense on the northern extremity of Kurkak range and a bimodal spectrum in CP Patrinia sibirica. The absence of juvenile in a spectrum and immature and senile individuals are most typical, and the peak is necessary on middle-generative individuals. CP Sophianthe sibirica belongs to mature, CP Patrinia sibirica and Anemonastrum biarmiense of the northern extremity of Kurkak range - to young, CP Anemonastrum biarmiense (mountain Kurkak) and Bupleurum multinerve - to maturing. The comparison of indexes ofrestoration and aging, reflecting dynamic processes of coenopopulations, has been carried out. Restoration index in CP Sophianthe sibirica, Bupleurum multinerve, Anemonastrum biarmiense (Kurkak) is low (less than 1.0), and in CP Patrinia sibirica and Anemonastrum biarmiense on the northern extremity of Kurkak range renewal processes are rather good (1.22-6.21). According to the results of researches of morphometric parameters, all studied plants are low -from 14 to 40 cm andform from 1 to 10 generative escapes, with the number of flowers from 3 to 37 pieces. For the majority of parameters a normal variation is characteristic. The studied populations of rare species are in a satisfactory and good state, which is proved by the density and structure of their populations.

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