Eurasian Journal of Ecology

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ASSESSMENT OF THE CURRENT STATE OF THE POPULATION OF THE SPECIES RHEUM WITTROCKII LUNDSTR. FLORA OF THE SOUTH-EAST OF KAZAKHSTAN
(Al-Farabi Kazakh National University, 2025-12-30)
Gulbanu Aueskhanovna Sadyrova
;
Kuralai Orazbekova
;
Marzhankul Dauletbayeva
;
Ainur Tanybayeva
;
Bayan Tussupova
This article is devoted to the study of the current state of the Rheum wittrockii Lundstr. species population, floristic composition and ecological characteristics of this species populations in the Uzynkara and Ile-Alatau ridges, Almaty region. Rheum wittrockii Lundstr., an ancient genus of the Neogene period of Asian origin, includes 9 species in Kazakhstan. Three natural populations of Rheum wittrockii Lundstr. were studied in various ecological and phytocenotic conditions of the Uzynkara and Ile-Alatau ridges. Rheum wittrockii in the studied areas are distributed in the middle part of the forest belt of mid-mountains where they exhibit high adaptive abilities, which indicate their ecological plasticity, are characterized by high rates of seed and vegetative reproduction, are resistant to diseases, retain a characteristic habitus in culture, are highly decorative and can be recommended for use in landscaping. In most populations of Rheum wittrockii, generative and virginal individuals prevailed, less often pregenerative individuals played the main role in the population. As a result of the monitoring, the population size in the studied area has been rapidly declining in recent decades, which requires necessary measures to preserve and restore the population size of Rheum wittrockii Lundstr. species in the studied area. To maintain and ensure normal life of Rheum wittrockii Lundstr. populations in the studied areas, it is necessary to standardize the degree of anthropogenic impacts. The main anthropogenic threats to the rare species Rheum wittrockii Lundstr. are overgrazing, habitat disturbance, which have led to a reduction in populations, which will require conservation strategies such as habitat monitoring. Keywords: natural populations, plant communities, rare species, Uzynkara. Ile Alatau
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CURRENT SOIL STATE OF POPULATIONS OF SEDUM HYBRIDUM L. AND SEDUM EWERSII LEDEB. FOUND IN THE ZAILIY ALATAU
(Al-Farabi Kazakh National University, 2024-01-01)
Tatyana Kobylina
;
Бекзат Тыныбеков
;
Akmaral Nurmahanova
;
Gulmira Satybaldiyeva
;
Gulbanu Aueskhanovna Sadyrova
The article describes the natural soil conditions of Sedum hybridum L. and Sedum ewersii Ledeb—populations area based on the results of field and laboratory soil studies of soils. Soil types, morphological features, chemical composition, nutrient elements, amount of humus, absorbed bases and salt composition, and mechanical composition of soils are determined. The following soil types were identified during field studies: Kokzhailau Gorge (population 1) – chernozem, Turgeni Gorge (population 2) – chernozem, near Kastek River (population 3) – chestnut soil. The humus content in the 0-80 cm layer of chernozem (population 1) of Kokzhailiau gorge is very high, ranging from 5.55-12.81%, the reaction of the soil medium is within pH 7.10-7.40, i.e. CO2 content ranges from 0.16 to 0.34. On chernozems of Turgeni gorge (population 2) humus content in 0-60 cm layer is very high, within 5.90-20.88%, reaction of soil medium within pH 6.15-7.07, amount of CO2 within 0.21-0.34. On chestnut soils near the Kastek River (population 3), the humus content in the 0-73 cm layer was in the range of 1.57-6.92%, the pH ranged from 7.13-8.23, i.e. it was alkaline, the CO2 content was in the range of 0.16 - 0.34. The composition of salts in the chernozems of the Kokzhailau gorge: CO3 - not detected; HCO3- - 0,24- 0,48 ; Cl- – 0.04; CO4- – 0,12-0,92; Sa+ – 0,29-0,49; Mg 2+ – 0,20-0,98; Na+ – 0,05-0,06; To+ – 0,05-0,23; The amount of salts is 0.060-0.083%. It was found that the soils of all 3 populations are not saline, since the amount of salts does not exceed the salinity limit.

Eurasian Journal of Ecology

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