Soils of the Darkhitui catena in the southern Vitim Plateau and their micromorphological features

Gyninova, A. B.; Badmaev, N. B.; Tsybenov, Yu. B.; Gonchikov, B. N.; Mangataev, A Ts; Куликов, А. И.; Sympilova, D P

doi:10.1088/1755-1315/862/1/012068

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…Our results showed that soil microbial communities at the Eravna Bazin (Vitim Plateau) were dominated by Actinobacteriota and Alphaproteobacteria, which were partly inconsistent with several studies, which reported that bacterial communities were dominated by Actinobacteriota [30][31][32], Proteobacteria [29,33,34], Bacteroidetes [35] or Proteobacteria, Acidobacteriota and Actinobacteriota [36]. We suppose that these differences are due to the unique conditions of soil formation (mountainous relief, sharply continental climate, permafrost) and the properties of the studied soils, which are formed on the southern border of the permafrost zone of Transbaikalia [3,6,14].…”

Section: Discussioncontrasting

confidence: 74%

“…Sampling depth and number of samples changed across habitats, resulting in 21 soil samples (Table S1). Samples for molecular genetic studies were selected on the basis of previous morphological and geochemical studies [3,5,6,14]. Soil moisture, temperature and pH were synchronously measured using a mobile measurement system for the coupled monitoring of atmospheric and soil parameters (ASMC, Tomsk, Russia), as well as a pH meter (HM Digital, Seoul, Korea).…”

Section: Soil Sampling and Analysismentioning

confidence: 99%

“…Cryogenic territories occupy a small part in the soil cover of Eastern Siberia. In the south of the Vitim Plateau, they are found under the middle and northern taiga shrub-lichen-moss larch and birch-forb forests on rubble-loam deposits in a cold, humid, semi-humid and semi-arid climate [3].…”

Section: Introductionmentioning

confidence: 99%

“…The object of our studies was the soil cover of the Darkhituy-Khaimisan transect (Eravninskaya depression, Buryatia). The soils of the transect polygon were well-characterized earlier [3,14].…”

Section: Introductionmentioning

confidence: 99%

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Microbial Community in the Permafrost Thaw Gradient in the South of the Vitim Plateau (Buryatia, Russia)

et al. 2022

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Soil microbial communities play key roles in biogeochemical cycles and greenhouse gas formation during the decomposition of the released organic matter in the thawing permafrost. The aim of our research was to assess the taxonomic prokaryotic diversity in soil-ecological niches of the Darkhituy-Khaimisan transect during the initial period of soil thawing. We investigated changes in the microbial communities present in the active layer of four sites representing distinct habitats (larch forest, birch forest, meadow steppe and thermokarst lake). We explore the relationship between the biogeochemical differences among habitats and the active layer microbial community via a spatial (across habitats, and with depth through the active layer) community survey using high-throughput Illumina sequencing. Microbial communities showed significant differences between active and frozen layers and across ecosystem types, including a high relative abundance of Alphaproteobacteria, Firmicutes, Crenarchaeota, Bacteroidota and Gemmatimonadota in the active layer and a high relative abundance of Actinobacteriota and Desulfobacterota in the frozen layer. Soil pH, temperature and moisture were the most significant parameters underlying the variations in the microbial community composition. CCA suggested that the differing environmental conditions between the four soil habitats had strong influences on microbial distribution and diversity and further explained the variability of soil microbial community structures.

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