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Influence of soil characteristics on the distribution and evolution of Trollius dschungaricus Regel populations in the Northern Tien Shan, Kazakhstan
 
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1
Al-Farabi Kazakh National University, Almaty, Kazakhstan
 
2
U.U. Uspanov Kazakh Research Institute of Soil Sciences and Agrochemistry, Almaty, Kazakhstan
 
3
Astana International University, Astana, Kazakhstan
 
4
Shakarim University of Semey, Semey, Kazakhstan
 
5
M. Utemisov West Kazakhstan University, Uralsk, Kazakhstan
 
These authors had equal contribution to this work
 
 
Corresponding author
Meruyert Kurmanbayeva   

Al-Farabi Kazakh National University, Almaty, Kazakhstan
 
 
 
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ABSTRACT
This study presents a comparative analysis of soil characteristics in three populations of the rare subalpine plant Trollius dschungaricus occurring in the Northern Tien Shan (Ketpen and Saty ridges). The aim was to identify soil factors that influence the species’ distribution and resilience under differing geo‑ecological conditions. The examined soils are classified as mountain‑meadow subalpine and sod‑clayey subalpine types. A morphological description of the soil profile was conducted alongside chemical and particle‑size analyses. The humus horizon thickness ranges from 32 to 40 cm, with humus content between 3.06 and 8.82 %. The soil solution is mainly neutral to slightly alkaline (pH 7.0 – 8.0); available phosphorus and potassium fall within medium to high supply levels. The most humus‑rich soils with the highest cation‑exchange capacity are found on the Saty ridge, whereas soils of the Ketpen ridge exhibit better drainage properties and a lower tendency toward compaction. All soils display weak carbonation, lack easily soluble salts, and show a propensity for surface horizon slaking under excessive moisture due to high silt and fine‑dust fractions. These findings allow an assessment of the ecological capacity of the study sites and provide recommendations for conserving T. dschungaricus habitats amid increasing anthropogenic pressure.
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