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Technogenic processes and agrodevelopment of the soil cover lead to significant transformations of soil chemical and biological properties. New methods of soil microbiology, including next-generation sequencing, allows us to investigate soil microbial composition in detail, including the taxonomy and ecological functions of soil bacteria. This study presents data on the taxonomic diversity of mature and anthropogenically disturbed soils in various ecosystems of Russia. Natural soils in the southern taiga (Leningrad region and Novgorod region), northern taiga (Komi republic), forest-tundra, and tundra (Nadym city and Salekhard city) were investigated using next-generation sequencing (16S rDNA amplicon sequencing). In each natural bioclimatic zone, anthropogenically disturbed quarry soils or agriculturally transformed soils were also investigated. It was found that Proteobacteria, Actinobateriota, Acidobateriota, Bacteroidota, Chroloflexi, Planctomycetota, Verrucomicrobiota and Firmicutes phyla were dominant in natural soils, with minor differences between agrosoils and mature soils. In the soils of quarries, there were revealed processes of declining diversity of microbiome communities and the replacement of them by bacterial communities, different from natural and agrogenic soils. Thus, the microbial community is the most sensitive indicator of anthropogenic soil amendments and can serve to assess the success of soil self-restoration after human intervention. [ABSTRACT FROM AUTHOR]

Microbial activity plays a crucial role in the development and formation of soil properties. The active and abandoned agricultural soils in the Arctic zone represent a valuable resource that can play a crucial role in providing food security in the northern regions. The reuse of abandoned land for agriculture will reduce environmental risks in the context of a changing climate. Therefore, there is a need for monitoring studies to assess changes in soil parameters after long-term abandonment (taxonomic diversity, agrochemical and physico-chemical qualities). In the study, we evaluated the taxonomic diversity of the microbiome in abandoned (postagrogenic) and pristine soils of the Central part of the Yamal region. In the process of taxonomic analysis, more than 30 different bacterial and archaeal phyla were identified. The formation of a specific microbiome associated with anthropogenic influence in post-agrogenic sites has been shown. Most common types of soil microorganisms in samples collected from pristine and postagrogenic soils were Firmicutes (average 26.86%), Proteobacteria (average 23.41%), and Actinobacteria (average 15.45%). Firmicutes phylum was found mainly in the agrocenoses soils, Proteobacteria were mainly described in the mature tundra soils, Actinobacteria in humid conditions. An increase in diversity indices in postagrogenic soils was shown. [ABSTRACT FROM AUTHOR]

This research looked at the state of soils faced with urbanization processes in the Arctic region of the Yamal-Nenets Autonomous District (YANAO). Soils recently used in agriculture, which are now included in the infrastructure of the cities of Salekhard, Labytnangi, Kharsaim, and Aksarka in the form of various parks and public gardens were studied. Morphological, physico-chemical, and agrochemical studies of selected soils were conducted. Significant differences in fertility parameters between urbanized abandoned agricultural soils and mature soils of the region were revealed. The quality of soil resources was also evaluated in terms of their ecotoxicology condition, namely, the concentrations of trace metals in soils were determined and their current condition was assessed using calculations of various individual and complex soil quality indices. [ABSTRACT FROM AUTHOR]

Dynamically developing urbanization causes a number of environmental effects, including those related to the chemical transformation of soils. Relatively less information about the urban areas of the Arctic and Subarctic zones, constructed mostly on permafrost and intensively populated areas can be found. By the example of the analysis of basic soil properties and concentrations of trace metals in the soils of the cities of Salekhard, Urengoy, Nadym, Novy Urengoy and Gaz Sale (the Yamalo-Nenets Autonomous District), as well as various functional zones within the cities, the relationship between the age of the cities, the level of anthropogenic pressure and the type of parent materials and the character of accumulation of metals in the soil profile of urban soils have been described. The direct correlation was found between the content of Pb, Cr, Ni, As and soil sorption characteristics. In young cities built on sandy sediments, there is less accumulation of heavy metals in the topsoil horizons. Relatively higher concentrations of Cu and Cd were noted in soils of industrialized cities, regardless of functional zones. The higher content of Cr, Ni, Cu, Zn, As and Pb has been registered in older zones also frequently used for residential purposes. The calculated values of the PI index for some functional zones of young cities show the medium and high content of heavy metals. The analysis of Igeo and PLI indices shows a large diversity both in relation to individual cities and their functional zones. Soil quality, in spite of the high level of anthropogenic load, was assessed as mostly satisfactory. [ABSTRACT FROM AUTHOR]