Micromycetes in podzolic and bog-podzolic soils in the middle taiga subzone of northeastern European Russia

Khabibullina, F. M.; Kuznetsova, Elena G.; Vaseneva, Inna

doi:10.1134/s1064229314100044

Cited by 21 publications

(8 citation statements)

References 3 publications

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“…This result may indicate an equally high ability of prokaryotes to survive in polar regions, regardless of their geographic location. However, the maximum of prokaryotes (about 10 9 cells/g of soil) in the analyzed soils is comparable in an order of magnitude with that for soddy-podzolic soils of central Russia [ 40 , 41 , 42 ]. This fact indicates a high potential for the biological activity of microorganisms in some loci, even for the Arctic territories.…”

Section: Discussionmentioning

confidence: 74%

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: Discussionmentioning

confidence: 74%

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

2021

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“…These processes lead to decreasing of H/C values (Lodygin and Beznosikov 2010). High moisture content in taiga soils, especially in stagnic horizons increases H/C values due to low microbiological activity of peat-podzolic soils (Khabibullina et al 2014), which favors conservation of carbohydrate and amino acid fragments in HA structure. For every tundra soil type, the H/C values decrease downwards soil profile evidencing HAs in mineral horizons contain more aromatic fragments.…”

Section: Horizonmentioning

confidence: 99%

Humic substances elemental composition of selected taiga and tundra soils from Russian European North-East

Лодыгин¹,

Beznosikov²,

Abakumov³

2017

Polish Polar Research

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This paper provides an overview of the results of research on changes in ground temperature down to 50 cm depth, on the Kaffiøyra Plain, Spitsbergen in the summer seasons. To achieve this, measurement data were analysed from three different ecotopes (CALM Site P2A, P2B and P2C) -a beach, a moraine and tundra -collected during 22 polar expeditions between 1975 and 2014. To ensure comparability, data sets for the common period from 21 July to 31 August (referred to as the "summer season" further in the text) were analysed. The greatest influence on temperature across the inves− tigated ground layers comes from air temperature (correlation coefficients ranging from 0.61 to 0.84). For the purpose of the analysis of the changes in ground temperature in the years 1975-2014, missing data for certain summer seasons were reconstructed on the ba− sis of similar data from a meteorological station at Ny−Ålesund. The ground temperature at the Beach site demonstrated a statistically−significant growing trend: at depths from 1 to 10 cm the temperature increased by 0.27-0.28°C per decade, and from 20 to 50 cm by as much as 0.30°C per decade. On the Kaffiøyra Plain, the North Atlantic Oscillation (NAO) has a greater influence on the ground and air temperature than the Arctic Oscilla− tion (AO).

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“…This may be due to the mycorrhizal mycobiota, which have the greatest extent of mycelium in the surface layers [ 80 ]. The greatest length of mycelium and number of large propagules (5–7 μm in diameter) were also shown for the O horizon, where the abundance of organic matter ensures the greatest taxonomic diversity of mycobiota, which is supported by high correlation values r = 0.68–0.72 [ 81 ]. The deeper layers were depleted in fungal propagules due to the lack of organic matter, limited access to the atmospheric oxygen, and the low number of fine roots required for symbiosis [ 82 , 83 ].…”

Section: Discussionmentioning

confidence: 97%

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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Micromycetes in podzolic and bog-podzolic soils in the middle taiga subzone of northeastern European Russia

Cited by 21 publications

References 3 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

Humic substances elemental composition of selected taiga and tundra soils from Russian European North-East

Urbanization Affects Soil Microbiome Profile Distribution in the Russian Arctic Region

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