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The article presents the results of mapping ecosystems of the protected area of the Natural Park “Medeu”,located on the northern slope of the Trans-Ili Alatau mountain range. The map of ecosystems and a legend has beencompiled. The legend contains 13 numbers. The largest sections of the legend are the natural ecosystems of the protectedarea and the natural-anthropogenic ecosystems of the buffer zone and the zone of limited economic activity. The habitatsof species from Red Data book of Kazakhstan that form communities (Malus sieversii (Ledeb.) M. Roem., Armeniacavulgaris Lam., Celtis australis subsp. caucasica (Willd.) C. C. Towns. identified, and their brief characteristics are given.

Fraxinus sogdiana Bunge (family Oleaceae) is a rare, relict species, with a disjunctive distribution range. The species is listed in the Red Book of Kazakhstan. The aim of this study was to determine anatomical features and identify the phytochemical composition of F. sogdiana growing in different soils in Kazakhstan. The research objects were vegetative organs collected in the Temirlik River Valley of the Almaty region (the State National Nature Park “Sharyn”) and the Boralday River Valley of the Turkestan region (the Syrdarya–Turkestan Regional Nature Park) in 2020–2022. A comparative anatomical analysis of the vegetative organs of F. sogdiana revealed similarities and differences between the specimens studied. The level of significance was taken at 5%. The main feature identified in the anatomical structure of the F. sogdiana leaves was the presence of large special motor cells in the upper and lower epidermis. A study of the phytochemical composition identified the ten most important biologically active substances with antimicrobial, antitumor, diuretic, and antioxidative properties. In the study areas, soils were different in terms of conditions and time of soil formation. The soil profile of the floodplain terrace of the Temirlik River was found to be stratified with alternating interlayers of light loamy and sandy loam granulometric composition with inclusions of pebbles; differentiation of the soil profile into genetic horizons was poorly pronounced. The soil profile of the floodplain terrace of the Boralday River had a clear differentiation into genetic horizons.

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The results of the steppe zone ecosystems investigation in Western Kazakhstan are presented. Theclassification of the main types of terrestrial ecosystems of the desert steppes subzone, divided by the forms of macrorelief(elevated plains, river valleys, sand massifs) and grouped into categories according to the type of water regime (automorphic,semihydromorphic, hydromorphic), is presented. Within the automorphic category, one zonal class of ecosystems hasbeen distinguished: cereal-wormwood desert steppes on light chestnut soils. The semi-hydromorphic category includesecosystems of wormwood-halophytic-cereal steppe meadows on meadow-chestnut soils. The hydromorphic categoryof river valleys is characterized by ecosystems of floodplain forest-meadow and tree-shrub tugai on floodplain meadowsoils.