Natural regeneration of Sogdian ash, Fraxinus sogdiana Bunge, in the floodplain of Sharyn River in Almaty region, Kazakhstan

Document Type : Research Paper

Authors

Department of “Forestry, game management and aquaculture”, Faculties “Forestry and land resources” Kazakh National Agrarian Research University, Almaty, Kazakhstan

10.22124/cjes.2025.9353

Abstract

The present study was carried out to find the natural regeneration patterns of Sogdian ash, Fraxinus sogdiana Bunge, in the fertile forests along the Sharin River in Almaty Province, Kazakhstan. We investigated factors affecting the establishment and growth of seedlings of this valuable species in the gradient of distance from the river. A systematic survey method with 40 plots each 20 × 20 m2 at different distances from the river was used to attain this goal. Data on seedling density in three different elevation classes, soil physico-chemical characteristics, light intensity, and health were carefully recorded and analyzed. The results showed that the distance from the river played a decisive role in the success of the natural regeneration of this species. The density of seedlings decreased from 2850 plants ha-1 for the area within 0-50 m along the river up to 290 plants ha-1 in an area where distance from the river was more than 150 m. Correlation analysis confirmed the existence of a significant correlation between distance from the river and seedling density, with a coefficient of -0.91. Soil properties including moisture (from 32.5% to 12.3%) and organic matter (from 4.5% to 2.1%) were also found to decrease by elevating distance from the river. On the other hand, the health of the seedlings beside the river was much better, and the proportion of healthy seedlings decreased from 85.5% close to the river to 41.2% at further distances. The growth rate of the established seedlings was also considerably higher beside the river, being 28.5 cm yr-1 compared to 12.3 cm yr-1 for the more distant plants. All these findings clearly suggest that maintaining the ecological conditions of the riverbank is crucially important for the continuation of the species, and also any change in the hydrological regime of the river can be considered a grave threat to the survival of this valuable ecosystem.

Keywords

References

 
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Caspian Journal of Environmental Sciences
Volume 23, Issue 5
Special issue: Biological Researches and Envireonment, Guest Editor: Prof. Hamed Mousavi-Sabet, University of Guilan, Iran
December 2025
Pages 1127-1133

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