Rakhimovа N.K., Rakhimova T., Shomurodov Kh.F., Sharipova V.K. STATE OF XYLOSALSOLA CHIWENSIS (POPOV) AKHANI & ROALSON AND SCORZONERA BUNGEI KRASCH. & LIPSCH. CENOPOPULATIONS ON THE USTYURT PLATEAU, UZBEKISTAN// Arid Ecosystems. 2023. Vol. 29. № 2 (95). P. 77-84. | PDF
It is our priority to conduct environmental monitoring, protect rare plant species and conduct studies to assess the state of populations of rare and endangered plants using coenopopulation approaches is a priority, along with the conservation of plant communities with participation of rare species. The aim of our work was to study the ecological and phytocenotic state of rare Xylosalsola chiwensis and Scorzonera bungei coenotic populations in Ustyurt. These species are listed in the Red Data Book of the Republic of Uzbekistan. We provide the characteristics of plant communities with cenopopulations of the studied species. The ontogenetic structure of these species has been studied. The results showed that in the ecological and cenotic conditions of Ustyurt, the studied coenopopulations are normal, but incomplete. The basic ontogenetic spectrum is centered, with a peak of the middle-aged generative plants. The spectra of specific cenopopulations are centered and left-sided due to the ecological habitat conditions and weather fluctuations. With the development of distant pastures and the planning of linear infrastructures, these species must be protected. The results of this study will be used in the next editions of the Red Data Book of the Republic of Uzbekistan.
Funding. The work was carried out for the project F5-FA-0-13289 “Modern Trends in the Development of Vegetation and Wildlife of Ustyurt in the Process of Desertification” and the state program (PFI-5) “Assessment of the Current State of Vegetation Cover and Pasture Resources of the Republic of Karakalpakstan”.
Rakhimova N.K., Rakhimova T., Adilov B.A., Tamambetova Sh.B., Polvonov F.I. CURRENT STATE CRAMBE EDENTULA FISCH. & C.A. MEY. EX KORSH. ON THE PLATO OF USTURT IN UZBEKISTAN // Arid ecosystems. 2021. V.27. № 4 (88). P. 70-76. | PDF
The article is devoted to the assessment of the state of the ontogenetic structure of the rare species Crambe edentula Fisch. & C.A. Mey. ex Korsh., growing in the Karakalpak part of Ustyurt. The study showed that in the ecological-cenotic conditions of Ustyurt, the studied cenopopulations are normal, mostly incomplete. The characteristic ontogenetic spectrum for C. edentula is centered due to an increase in the life span of individuals in a mature generative state and poor seed renewal. Ontogenetic spectra of cenopopulations do not coincide with the characteristic one. The spectra of specific cenopopulations are left-sided and right-sided, which is associated with ecological habitat conditions and fluctuations in weather conditions.
Keywords: Ustyurt plateau, infrastructure development, endemics, rare plant species, ontogenetic structure, age and efficiency of cenopopulations.
Rakhimova Т., Rakhimova N.К., Shomurodov Kh.F., Abduraimov О.S. Ontogenetic Structure of Rare Species on the Ustyurt Plateau in Uzbekistan // Arid ecosystems. 2020. V. 26. № 3 (84). P. 71-78. | PDF
The research assesses the state of the ontogenetic structure of some rare species (Rosa laxa Retz., Crataegus korolkowii L. Henry, Artemisia terrae-albae Krasch. and Salsola arbusculiformis Drob.) growing on the Karakalpak part of Ustyurt. The study shows that the studied cenopopulations are normal and mostly incomplete under the ecological and cenotic conditions of Ustyurt. The ontogenetic spectra of specific cenopopulations are left-sided and centered, which associated with the environmental living conditions and fluctuations in weather conditions. The similarity of biological features (long-term life expectancy of individuals in a middle-age ontogenetic state, the least elimination, and difficult seed germination) in individuals of different species and the actual, ontogenetic spectra with a characteristic spectrum indicates a stable state of the studied cenopopulations on the Karakalpak part of Ustyurt.
Key words: Ustyurt plateau, infrastructure development, endemics, rare plant species, ontogenetic structure, age and efficiency of cenopopulations.