Maqola

Soil Salinity and Physicochemical Drivers of Microbial Community Composition in the Desiccated Aral Sea Bed

Zafarjon JabbarovNational University of Uzbekistan, Faculty Biology and Ecology, Tashkent, University-4, 100174, UzbekistanTokhtasin AbdrakhmanovNational University of Uzbekistan, Faculty Biology and Ecology, Tashkent, University-4, 100174, UzbekistanShokhrukh AbdullaevNational University of Uzbekistan, Faculty Biology and Ecology, Tashkent, University-4, 100174, UzbekistanUrol NomozovTashkent branch of the Samarkand State University Veterinary Medicine of Livestock and Biotechnologies, Chilanzar, 35a, UzbekistanKarimov H. KholmamatovichInstitute of Microbiology of Uzbekistan Academy of Sciences, A. Kadiry, 7B, Tashkent 100128;Dilafruz MakhkamovaNational University of Uzbekistan, Faculty Biology and Ecology, Tashkent, University-4, 100174, UzbekistanNurmukhammad ZafarjonovNational University of Uzbekistan, Faculty Biology and Ecology, Tashkent, University-4, 100174, UzbekistanI. A. AslanovTTIIAME National research university, 39 Kori Niyoziy str. 10000, Tashkent, Uzbekistan

2026

Ochiq kirishOlmos

Litsenziya: cc-by-nc

ABI

Annotatsiya

For more than six decades following the desiccation of the Aral Sea, soil formation processes on the exposed seabed have undergone continuous development, leading to pronounced changes in physicochemical and biological properties. This study evaluates the influence of soil salinity and physicochemical parameters on microbial communities in newly formed soils of the dried Aral Sea bed. The investigated soils exhibited moderate to high salinity (EC 6.2–8.2 mS cm⁻¹) and slightly alkaline conditions (pH/H₂O 7.7–8.9), with low organic carbon (0.20–0.39%) and humus contents (0.35–0.68%). Carbonate and sulfate–chloride salts predominated, while soil textures ranged from heavy to light. Microbiological analyses indicated the ubiquitous presence of ammonifying and humus-decomposing microorganisms, whereas phosphate-solubilizing and oligonitrophilic bacteria were mainly associated with moderately saline soils. Actinomycetes and micromycetes were detected only sporadically. Statistical analyses revealed a strong positive correlation between electrical conductivity and soil pH (r = 0.85, p < 0.01), while most microbial indicators showed negative relationships with salinity and alkalinity. These results demonstrate that soil salinity and pH are key environmental drivers constraining microbial diversity and activity during early soil development in arid, saline post-lacustrine ecosystems.

Hali tarjima qilinmagan

Identifikatorlar

DOI: 10.11113/mjfas.v22n2.4904

Iqtiboslar va manbalar

0 ta iqtibos0 ta foydalanilgan manba