Архив метки: ontogenetic structure

ONTOGENESIS AND ONTOGENETIC STRUCTURE OF COENOPOPULATIONS OF THE ASTRAGALUS HOLARGYREUS BUNGE (FABACEAE), NARROW-LOCALITY ENDEMIC OF KYZYLKUM

Arid Ecosystems

UDC 581.5+581.14 (575.13)

Saribaeva Sh.U., Shomurodov H.F., Abduraimov O.S. ONTOGENESIS AND ONTOGENETIC STRUCTURE OF COENOPOPULATIONS OF THE ASTRAGALUS HOLARGYREUS BUNGE (FABACEAE), NARROW-LOCALITY ENDEMIC OF KYZYLKUM // Arid ecosystems. 2022. V.28. № 1 (90). P. 91-97. | PDF

Analysis of the current state of the narrow-local endemic of the Kyzylkum Astragalus holargyreus showed that the studied coenopopulations are normal and incomplete. The study showed coenopopulations of A. holargyreus are normal and incomplete. The age spectrum of the first coenopopulation responds to the characteristic spectrum and reflects the biological features of the species: a gradual increase in life expectancy in the juvenile fraction and generative periods with a culmination in the middle-aged state, rapid aging. The ontogenetic spectrum in the second coenopopulation does not coincide with the characteristic spectrum. According to the amount of the points of organism and population signs, all the examined coenopopulations are in a stable state.

Keywords: ontogenesis, Kyzylkum desert, Astragalus holargyreus, Bukantau range, ontogenetic structure, coenopopulation.

Financing. The work was carried out with the support of the project of the Ministry of Innovation of the Republic of Uzbekistan, scientific project No. P3-2014-0828163420 “Assessment of the state of coenopopulations of rare and endangered plant species of the remnant lowlands of Kyzylkum in connection with desertification”.

DOI: 10.24412/1993-3916-2022-1-91-98

CURRENT STATE CRAMBE EDENTULA FISCH. & C.A. MEY. EX KORSH. ON THE PLATO OF USTURT IN UZBEKISTAN

Arid Ecosystems

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.

DOI: 10.24412/1993-3916-2021-4-70-76

ONTOGENETIC STRUCTURE OF RARE SPECIES ON THE USTYURT PLATEAU IN UZBEKISTAN

Arid Ecosystems

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.

DOI: 10.24411/1993-3916-2020-10109