Microbial C-availability and organic matter decomposition in urban soils of megapolis depend on functional zoning

Ivashchenko, Kristina; Ananyeva, N. D.; Vasenev, Viacheslav; Sushko, Sofia; Seleznyova, Alexandra; Kudeyarov, V. N.

doi:10.25252/se/19/61524

Cited by 32 publications

(9 citation statements)

References 49 publications

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“…We believe that this is primarily due to the non-critical concentration of hydrocarbons for the vital activity of most soil archaea, bacteria, and fungi. The main factor influencing the growth and development of microorganisms was the content of organic carbon in the soil, which was consistent with the work of many microbiologists [ 48 , 49 , 50 ].…”

Section: Discussionsupporting

confidence: 84%

Qualitative and Quantitative Characteristics of Soil Microbiome of Barents Sea Coast, Kola Peninsula

2021

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The soil microbiome of the Barents Sea coast of the Kola Peninsula is here characterized for the first time. The content of copies of ribosomal genes of archaea, bacteria, and fungi was determined by real-time PCR. Reserves and structure of biomass of soil microorganisms such as total biomass of fungi and prokaryotes, length and diameter of mycelium of fungi and actinomycetes, proportion of mycelium in biomass, number of spores and prokaryotic cells, proportion of small and large fungal propagules, and morphology of mycobiota spores were determined. The largest number of ribosomal gene copies was found for bacteria (from 6.47 × 109 to 3.02 × 1011 per g soil). The number of copies of ribosomal genes of fungi and archaea varied within 107–109 copies of genes/g soil. The biomass of microorganisms (prokaryotes and fungi in total) varied from 0.023 to 0.840 mg/g soil. The share of mycobiota in the microbial biomass ranged from 90% to 97%. The number of prokaryotes was not large and varied from 1.87 × 108 to 1.40 × 109 cells/g of soil, while the biomass of fungi was very significant and varied from 0.021 to 0.715 mg/g of soil. The length of actinomycete mycelium was small—from 0.77 to 88.18 m/g of soil, as was the length of fungal hyphae—an order of magnitude higher (up to 504.22 m/g of soil). The proportion of fungal mycelium, an active component of fungal biomass, varied from 25% to 89%. Most (from 65% to 100%) of mycobiota propagules were represented by specimens of small sizes, 2–3 microns. Thus, it is shown that, despite the extreme position on the mainland land of Fennoscandia, local soils had a significant number of microorganisms, on which the productivity of ecosystems largely depends.

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Section: Discussionsupporting

confidence: 84%

Qualitative and Quantitative Characteristics of Soil Microbiome of Barents Sea Coast, Kola Peninsula

2021

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“…This is in agreement with the previous studies, which used remote sensing and spatial modeling to show a positive effect of urbanization on the topsoil C stocks with the highest C stocks in the recreational and residential zones [ 31 ]. Neutralization of the naturally acidic soils is a typical urbanization effect previously described for many cities in polar and boreal zones [ 51 , 52 , 53 ]. Dust deposition from building construction, as well as the implementation of the de-icing reagents, are the main sources of the additional calcium input, shifting soil pH [ 54 , 55 ].…”

Section: Discussionmentioning

confidence: 99%

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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“…The negative effects of the PTE on the microbial community (reflected in high MR) were reported for urban soils before [54,55] and indicated stressful conditions for microbiome; however, the opposite effect of C and N input was expected. Apparently, C and N contents in some materials (e.g., in valley peats and high-peat mixtures) were so high that they could not be taken due to the exceeded capacity of their assimilation by microbial community, and therefore resulted in a qCO 2 increase.…”

Section: Relationships Between Microbial and Chemical Propertiesmentioning

confidence: 91%

Assessing Soil-like Materials for Ecosystem Services Provided by Constructed Technosols

Ivashchenko

Lepore

Vasenev

et al. 2021

Land

Self Cite

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Urbanization results to a wide spread of Technosols. Various materials are used for Technosols’ construction with a limited attention to their ecosystem services or disservices. The research focuses on the integral assessment of soil-like materials used for Technosols’ construction in Moscow megalopolis from the ecosystem services’ perspective. Four groups of materials (valley peats, sediments, cultural layers, and commercial manufactured soil mixtures) were assessed based on the indicators, which are integral, informative, and cost-effective. Microbial respiration, C-availability, specific respiration, community level physiological profile, and Shannon’ diversity index in the materials were compared to the natural reference to assess and rank the ecosystem services and disservices. The assessment showed that sediments and low-peat mixtures (≤30% of peat in total volume) had a considerably higher capacity to provide C-sequestration, climate regulation and functional diversity services compared to peats and high-peat mixtures. Urban cultural layers provided ecosystem disservices due to pollution by potentially toxic elements and health risks from the pathogenic fungi. Mixtures comprising from the sediments with minor (≤30%) peat addition would have a high potential to increase C-sequestration and to enrich microbial functional diversity. Their implementation in urban landscaping will reduce management costs and increase sustainability of urban soils and ecosystem.

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Microbial C-availability and organic matter decomposition in urban soils of megapolis depend on functional zoning

Cited by 32 publications

References 49 publications

Qualitative and Quantitative Characteristics of Soil Microbiome of Barents Sea Coast, Kola Peninsula

Qualitative and Quantitative Characteristics of Soil Microbiome of Barents Sea Coast, Kola Peninsula

Urbanization Affects Soil Microbiome Profile Distribution in the Russian Arctic Region

Assessing Soil-like Materials for Ecosystem Services Provided by Constructed Technosols

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