Distribution of prokaryotic communities throughout the Chernozem profiles under different land uses for over a century

Semënov, Mikhail; Чернов, Т. И.; Тхакахова, А. К.; Железова, А. Д.; Иванова, Е. А.; Колганова, Т. В.; Kutovaya, O. V.

doi:10.1016/j.apsoil.2018.03.002

Cited by 47 publications

(18 citation statements)

References 74 publications

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“…The number of the rRNA gene copies of fungal and bacterial in the subsoils layers deeper than 30 cm was higher in the urban soil (mainly in MUR-U1) than in the natural soil horizons at the same depth. The number of fungi and bacteria gene copies in the horizons was positively correlated with the SOC content, which is in good coherence with the previous studies [ 73 , 78 , 88 ]. The fungi/bacteria ratio in urban subsoils was almost two times higher than in natural soils and never decreased below 90%.…”

Section: Discussionsupporting

confidence: 91%

Urbanization Affects Soil Microbiome Profile Distribution in the Russian Arctic Region

Korneykova

Vasenev

Никитин

et al. 2021

IJERPH

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Urbanization in the Arctic results in considerable and still poorly known environmental consequences. The effect of urbanization on soil microbiome—an ecosystem component highly sensitive to anthropogenic disturbance—remains overlooked for the Arctic region. The research compared chemical and microbial properties of the natural Podzol soils and urban soils of Murmansk—the largest Arctic city. Particular attention was given to the profile distribution, which is almost completely ignored by most microbial studies. Soil microbiome was investigated by the quantitative indicators based on fluorescence microscopy (microbial biomass) and PCR real-time methods (amount of rRNA genes copies of archaea, bacteria, and fungi). The principal changes in urban soils’ properties compared to the natural references included a shift in pH and an increase in C and nutrients’ contents, especially remarkable for the subsoil. The numbers of rRNA genes copies of archaea, bacteria, and fungi in urban topsoils (106–1010, 109–1010, and 107–109, respectively) were lower than in Podzol; however, the opposite pattern was shown for the subsoil. Similarly, the total microbial biomass in urban topsoils (0.55–0.75 mg g−1) was lower compared to the 1.02 mg g−1 in Podzols, while urban subsoil microbial biomass was 2–2.5 times higher than in the natural conditions. Both for urban and natural soils and throughout the profiles, fungi were dominated by mycelium forms; however, the ratios of mycelium–spores were lower, and the amount of thin mycelium was higher in urban soils than in natural Podzols. Urbanization in the Arctic altered soil morphological and chemical properties and created a new niche for microbial development in urban subsoils; its contribution to biodiversity and nutrient cycling promises to become increasingly important under projected climate change.

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Section: Discussionsupporting

confidence: 91%

Urbanization Affects Soil Microbiome Profile Distribution in the Russian Arctic Region

Korneykova

Vasenev

Никитин

et al. 2021

IJERPH

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“…However, the abundance of genes increased from unfixed sand to mature soil in both chronosequences, which can be an effect of plant community development and consequently higher available organic carbon and nitrogen contents. Available organic matter in soil is known to be a limiting factor of microbial community development [42], and a correlation between the quantity of ribosomal genes and soil organic carbon content was previously observed for other soils [43].…”

Section: Discussionmentioning

confidence: 99%

Prokaryotic community shifts during soil formation on sands in the tundra zone

et al. 2019

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A chronosequence approach, i . e ., a comparison of spatially distinct plots with different stages of succession, is commonly used for studying microbial community dynamics during paedogenesis. The successional traits of prokaryotic communities following sand fixation processes have previously been characterized for arid and semi-arid regions, but they have not been considered for the tundra zone, where the environmental conditions are unfavourable for the establishment of complicated biocoenoses. In this research, we characterized the prokaryotic diversity and abundance of microbial genes found in a typical tundra and wooded tundra along a gradient of increasing vegetation—unfixed aeolian sand, semi-fixed surfaces with mosses and lichens, and mature soil under fully developed plant cover. Microbial communities from typical tundra and wooded tundra plots at three stages of sand fixation were compared using quantitative polymerase chain reaction (qPCR) and high-throughput sequencing of 16S rRNA gene libraries. The abundances of ribosomal genes increased gradually in both chronosequences, and a similar trend was observed for the functional genes related to the nitrogen cycle ( nifH , bacterial amoA , nirK and nirS) . The relative abundance of Planctomycetes increased, while those of Thaumarchaeota , Cyanobacteria and Chloroflexi decreased from unfixed sands to mature soils. According to β-diversity analysis, prokaryotic communities of unfixed sands were more heterogeneous compared to those of mature soils. Despite the differences in the plant cover of the two mature soils, the structural compositions of the prokaryotic communities were shaped in the same way. Thus, sand fixation in the tundra zone increases archaeal, bacterial and fungal abundances, shifts and unifies prokaryotic communities structure.

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“…In the soil under man-made larch stands, a significant decrease in the richness of Verrucomicrobia was determined. This group of bacteria is, according to literature, sensitive to the concentration of organic matter in soils [39,40], which explains its appearance in the upper root-inhabited soil layers. This group was found as well in chernozems under the cover of zonal vegetation [40], which, in turn, indirectly indicates that the optimum of this group is around neutral pH values.…”

Section: Plos Onementioning

confidence: 90%

The shifts in the structure of the prokaryotic community of mountain-grassland soil under the influence of artificial larch plantations

et al. 2022

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Creation of artificial forest plantations on a global scale is one of the ways to mitigate the negative effects of climate change on ecosystems, at the same time providing soil protection from erosion, regulation of the hydrological regime and carbon sequestration in soils of different natural and climatic zones. However, the change of the dominant plant community cause significant ecosystem changes, reflecting at the structure and functioning of the soil microbial complex as well. The shifts in prokaryotic community of the meadow soil resulting from the conversion of the native meadow (further grassland) phytocenosis to the artificial forest plantations was investigated with the use of NGS sequencing technology and metabarcoding approach–amplicon sequencing of V4 region of 16 S rRNA (performed on Illumina Miseq platform). The identified shifts in taxonomic structure and diversity may be the result of changes in the physic-chemical conditions of soils and, on the other hand, may serve as indicators of such changes. Cultivation of larch led to an increase in the diversity of the prokaryotic community and its stratification by depth. The acidifying effect of larch manifested itself in an increase in the proportion and diversity of acidobacteria, in the abundance of oligotrophic microorganisms of phyla Chloroflexi, Firmicutes, and a simultaneous comparative decrease in the bacteria of Verrucomicrobia phylum, alphaproteobacteria of or. Rhizobiales and Burkholderiales. The absence of clearly expressed dominants in the prokaryotic community, as well as a significant increase in alpha-diversity indices, compared with the control plot of native mountain-meadow soil under grassland vegetation, suggests a transitional nature of the soil ecosystem of artificial forest plantations.

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Distribution of prokaryotic communities throughout the Chernozem profiles under different land uses for over a century

Cited by 47 publications

References 74 publications

Urbanization Affects Soil Microbiome Profile Distribution in the Russian Arctic Region

Urbanization Affects Soil Microbiome Profile Distribution in the Russian Arctic Region

Prokaryotic community shifts during soil formation on sands in the tundra zone

The shifts in the structure of the prokaryotic community of mountain-grassland soil under the influence of artificial larch plantations

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