Urbanization Affects Soil Microbiome Profile Distribution in the Russian Arctic Region

Korneykova, M.V.; Vasenev, V.I.; Nikitin, D.A.; Soshina, A.S.; Dolgikh, A.V.; Sotnikova, Y.L.

Авторы: Korneykova M.V., Vasenev V.I., Nikitin D.A., Soshina A.S., Dolgikh A.V., Sotnikova Y.L.
Журнал: International Journal of Environmental Research and Public Health
Номер: 18
Год издания: 2021
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
Первая страница: 11665
Последняя страница: 11665
DOI: 10.3390/ijerph182111665
Аннотация: Urbanization in the Arctic results in considerable and still poorly known environmentalconsequences. The effect of urbanization on soil microbiome—an ecosystem component highly sensitiveto anthropogenic disturbance—remains overlooked for the Arctic region. The research comparedchemical and microbial properties of the natural Podzol soils and urban soils of Murmansk—thelargest Arctic city. Particular attention was given to the profile distribution, which is almost completelyignored by most microbial studies. Soil microbiome was investigated by the quantitativeindicators based on fluorescence microscopy (microbial biomass) and PCR real-time methods (amountof rRNA genes copies of archaea, bacteria, and fungi). The principal changes in urban soils’ propertiescompared 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, andfungi 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 inurban topsoils (0.55–0.75 mg g􀀀1) was lower compared to the 1.02 mg g􀀀1 in Podzols, while urbansubsoil microbial biomass was 2–2.5 times higher than in the natural conditions. Both for urbanand 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 urbansoils than in natural Podzols. Urbanization in the Arctic altered soil morphological and chemicalproperties and created a new niche for microbial development in urban subsoils; its contributionto biodiversity and nutrient cycling promises to become increasingly important under projectedclimate change.
Добавил в систему: Никитин Дмитрий Алексеевич

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Urbanization Affects Soil Microbiome Profile Distribution in the Russian Arctic Regionстатья

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