Search

Your search keyword '"Dolgikh, A.V."' showing total 3 results
Start Over Author "Dolgikh, A.V." Publication Year Range Last 3 years

Refine your results

3 results on '"Dolgikh, A.V."'

1. This title is unavailable for guests, please login to see more information.

Author

Ananyeva, N.D., Khatit, R.Y., Ivashchenko, K.V., Sushko, S.V., Gorbacheva, A.Y., Dolgikh, A.V., Kadulin, M.S., Sotnikova, Y.L., Vasenev, V.I., Komarova, A.E., Yudina, A.V., Dovletyarova, E.A., Ananyeva, N.D., Khatit, R.Y., Ivashchenko, K.V., Sushko, S.V., Gorbacheva, A.Y., Dolgikh, A.V., Kadulin, M.S., Sotnikova, Y.L., Vasenev, V.I., Komarova, A.E., Yudina, A.V., and Dovletyarova, E.A.

Abstract

In six forest parks of Moscow and four suburban forests (5 plots each, n = 50), soil physical, chemical, and microbial properties of the upper 10-cm layer were assessed in combination with vegetation properties. The contents of carbon (C), nitrogen (N), and phosphorus (P) in soil and microbial biomass were determined. It was revealed that soil bulk density; pH value; and contents of N-NO3–,Ca, and heavy metals (Pb, Cu, Ni, Zn) increase in forest parks of Moscow in comparison with those in suburban forests. In the soils of forest parks, a decrease in the microbial biomass C (Cmic) content, basal respiration (BR), and microbial C and N availability (Cmic/C, Nmic/N, BR/C) took place. The changes in soil microbial properties were mainly driven by the decrease in abundance of leaf litter and the available soil C content (13–35% of the explained variance). The microbial response of soil microorganisms to input of low molecular weight organic substrates (carbohydrates, carboxylic and phenolic acids, amino acids, amino sugars) in forest parks and suburban forests did not differ significantly. In the soils of forest parks, no changes in microbial mineralization and immobilization of P (Pmic, Pmic/P) were found. The impact of urbanization on the forest ecosystems led mainly to a decrease in the intensity of soil C and N cycles. Apparently, these changes were caused by the recreational activity and management practices applied to green spaces in the city, which led, in particular, to a decrease in the amount of forest litter in urban parks compared to suburban forests.

Published
2023

2. Analysis of CO2 Emission from Urban Soils of the Kola Peninsula (European Arctic)

Author

Korneykova, M.V., Vasenev, V.I., Saltan, N.V., Slukovskaya, M.V., Soshina, A.S., Zavodskikh, M.S., Sotnikova, Y.L., Dolgikh, A.V., Korneykova, M.V., Vasenev, V.I., Saltan, N.V., Slukovskaya, M.V., Soshina, A.S., Zavodskikh, M.S., Sotnikova, Y.L., and Dolgikh, A.V.

Abstract

Dynamics of soil CO2 emission, temperature, and moisture were studied during the vegetation season (from May to October) in 2021 and 2022 in the residential areas of Murmansk and Apatity cities (Murmansk oblast) in comparison with natural areas. The mean emissions from urban soils were 5–7 g C/(m2 day) in summer and 1–2 g C/(m2 day) in spring and fall. Temperature was the main abiogenic factor that determined the seasonal dynamics of soil respiration (R 2 from 0.4 to 0.7, p < 0.05; Q 10 temperature coefficient up to 2.5), while excess moisture had a limiting effect, especially in the natural areas. The heterogeneity of hydrothermal conditions and the content of biophilic elements determined the differences in the mean CO2 emission between natural and urban soils. For the natural soils, the mean temperature was lower and the moisture content was higher than for urban areas, which determined the lowest emission values. Among urban sites, higher CO2 emissions were found for tree and shrub vegetation sites.

Published
2023

3. Influence of Meso- and Microclimatic Conditions on the CO2 Emission from Soils of the Urban Green Infrastructure of the Moscow Metropolis

Author

Vasenev, V.I., Varentsov, M.I., Sarzhanov, D.A., Makhinya, K.I., Gosse, D.D., Petrov, D.G., Dolgikh, A.V., Vasenev, V.I., Varentsov, M.I., Sarzhanov, D.A., Makhinya, K.I., Gosse, D.D., Petrov, D.G., and Dolgikh, A.V.

Abstract

Against the background of global warming, urban ecosystems are becoming increasingly vulnerable to climate stresses. Strategies for climate adaptation developed for almost every major city in the world pay considerable attention to urban green infrastructure as a nature-oriented solution for carbon sequestration. However, the influence of urban climate on the spatiotemporal variability of CO2 emissions from urban soils remains poorly understood, which can lead to inaccurate estimates and inflated expectations of urban green infrastructure in the context of carbon neutrality. In 2019–2022, studies of the dynamics of CO2 emission with parallel monitoring of soil temperature and soil moisture were carried out at three green infrastructure sites of Moscow differing in their mesoclimatic conditions. For each object, plots with different types of vegetation were compared, which made it possible to assess the internal heterogeneity of soil and microclimatic conditions. Soil temperature determined up to 70% of the total variance of CO2 emissions. Mean annual soil temperature in the city center was almost 3–6°C higher than that in the peripheral areas (10–12 km from the center), whereas soil moisture in the center was 10–15% lower. Soils under lawns and shrubs were, on average, 1–2°C warmer and 10–15% wetter than soils under trees. The annual CO2 emission from soils under lawns was, on average, 20–30% higher than that from soils under tree plantations in the same area. At the same time, the differences between the plots with the same vegetation in the center and on the periphery reached 50%, which reflects the high vulnerability of urban soil carbon stocks to mesoclimatic anomalies and the high risks of a further increase in CO2 emissions from urban soils against the background of climate change.

Published
2023

Catalog

Books, media, physical & digital resources
See catalog results