CURRENT STATE OF PRICOPOUTIONS OF RARE ENDEMIC SPECIES AS LEPIDOLOPHA NURATAVICA KRASCH. AND COUSINIA DSHISAKENSIS KULT

Abstract

The article is devoted to the assessment of the state of the ontogenetic structure of some rare endemic species – Lepidolopha nuratavica Krasch and Cousinia dshisakensis Kult, growing on the Aktau ridge (Navoi region). Based on a comparison of real spectra with theoretically established spectra, the state of the populations of the studied species was estimated. The research showed that under the ecological and coenotic conditions of the Aktau ridge, the studied cenopopulations are normal and incomplete. Juvenile and immature specimen are absent in both cenopopulations of L. nuratavica, whereas regenerative and senile individuals in cenopopulation of C. dshisakensis. The ontogenetic spectrum of coenopopulation 1 of L. nuratavica and C. dshisakensis coincides with the characteristic one and reflects the biological features of the species. The ontogenetic spectra of coenopopulations are centered and left-sided with a peak for middle-aged and young generative individuals, which is associated with environmental living conditions and anthropogenic pressure.