Stanislav Prokushkin - Academia.edu (original) (raw)
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Papers by Stanislav Prokushkin
DOC in streams and soils in forested watershed underlain by continuous permafrost: a seasonal pat... more DOC in streams and soils in forested watershed underlain by continuous permafrost: a seasonal pattern
Arabian Journal of Geosciences
Based on the long-term (12 years) data on soil respiration (SR) measurements in representative co... more Based on the long-term (12 years) data on soil respiration (SR) measurements in representative conifer forests of the Krasnoyarsk region (Central Siberia), we demonstrated specific characteristics of SR. The study sites located closely to Arctic Circle were related to different latitudes, including 56° N (SAE site, Krasnoyarsk), 60° N (ZOTTO site, Zotino), and 64° N (Tura site, Evenkia). Study sites were selected in forest ecosystems (> 41 years old) and represented a wide range of the climate, stand, permafrost availability, and soil types. However, the mean seasonal values of SR (mean ± SD) varied in a relatively narrow range from 2.11 ± 0.69 in the forest-steppe zone (SAE) to 2.82 ± 1.77 μmol CO2 m−2 s−1 in northern larch taiga (Tura). Nevertheless, a twofold difference in the duration of growing season among northern and southern locations results in a variation of total seasonal CO2 emissions (mean ± SD) from 216 ± 136 g C m−2 in larch stands of northern taiga to 369 ± 115 g C m−2 in larch stands of southern forest-steppe zone. Evaluation of the multiannual dynamics of SR over the past 1.5 decades (1995–2010) showed the escalation of SR in the permafrost larch stands (Tura) in 2005–2010. That has been coupled with the enhanced activity of the soil heterotrophic microbiota in 2007–2010. Our study highlights the importance of further monitoring of SR in permafrost Siberian ecosystems.
Landslide Science and Practice, 2013
In forested ecosystems developed on permafrost, solifluction processes are widespread, occur in y... more In forested ecosystems developed on permafrost, solifluction processes are widespread, occur in years of above average summer-autumn precipitation and can cover up to 20 % of total area of slopes adjacent to rivers. This process is the most destructive natural disturbance event resulting in complete disappearance of initial ecosystems (vegetation cover and soil). To analyze postsliding ecosystem succession, sites of two ages (5 and 35 years old) after solifluction were chosen along with Nizhnyaya (Lower) Tunguska River valley. Results show that regeneration of soil respiration and eco-physiological status of microbial communities in soil during postsolifluction succession starts with vegetation re-establishment. As long as ecosystems regenerate, accumulated litter contains the main pool of microorganisms, though microbial biomass of 35-year-old solifluction area does not reach the value of microbial biomass in control plots. Therefore, forested ecosystems in permafrost zone after landsliding requires decades for final successful restoration of soil respiration and the microbial community.
![Research paper thumbnail of Reaction of Larix gmelinii roots under low soil temperatures in northern parts of central Siberia [Russian Federation]](https://attachments.academia-assets.com/83855035/thumbnails/1.jpg)
](Eurasian Journal of …, 2002
This study examined how permafrost soils affect morphology, anatomy and metabolism of Dahurian la... more This study examined how permafrost soils affect morphology, anatomy and metabolism of Dahurian larch (L.. gmelinii) roots at five different sites in northern parts of Central Siberia. Field monitoring using custom-made rhizotrons showed that there were ...
Release of dissolved organic carbon (DOC) from boreal forest ecosystems of central Siberia includ... more Release of dissolved organic carbon (DOC) from boreal forest ecosystems of central Siberia including permafrost, mountain and south taiga zones was compared in terms of influence of sitespecific environmental conditions. Pinus sylvestris (southern part), Abies sibirica (mountain) and Larix gmelinii (permafrost) have different adaptational strategies and cover areas with unique hydroclimatic conditions. Among forest patterns, litter is characterized by large dissolved organic carbon DOC flux compared to that of forest floor vegetation and throughfall. Precipitation and temperature of decomposing layers were found to be the most important factors determining DOC release. Insufficient heat supply has led to a sharp decrease in extractable DOC contents in the forest floor and litter in the larch stand. DOC influx in throughfall was also important for the DOC dynamics in the organic horizon. The formation of impermeable layers of permafrost and basalt bedrock have resulted in a high DOC concentration in stream water in the watershed. Precipitation magnitude considerably affected DOC output in stream water. After long-term rainfall, DOC flux in stream water in the larch basin reached 38 mgC'm-2 d-I, almost IOO-fold higher than that during the low flow period.
Forests
The observed high spatial variation in soil respiration (SR) and associated parameters emphasized... more The observed high spatial variation in soil respiration (SR) and associated parameters emphasized the importance of SR heterogeneity at high latitudes and the involvement of many factors in its regulation, especially within fire-affected areas. The problem of estimating CO2 emissions during post-fire recovery in high-latitude ecosystems addresses the mutual influence of wildfires and climate change on the C cycle. Despite its importance, especially in permafrost regions because of their vulnerability, the mutual influence of these factors on CO2 dynamics has rarely been studied. Thus, we aimed to understand the dynamics of soil respiration (SR) in wildfire-affected larch recovery successions. We analyzed 16-year data (1995–2010) on SR and associated soil, biological, and environmental parameters obtained during several field studies in larch stands of different ages (0–276 years) in the Krasnoyarsk region (Russia). We observed a high variation in SR and related parameters among the ...
DOC in streams and soils in forested watershed underlain by continuous permafrost: a seasonal pat... more DOC in streams and soils in forested watershed underlain by continuous permafrost: a seasonal pattern
Arabian Journal of Geosciences
Based on the long-term (12 years) data on soil respiration (SR) measurements in representative co... more Based on the long-term (12 years) data on soil respiration (SR) measurements in representative conifer forests of the Krasnoyarsk region (Central Siberia), we demonstrated specific characteristics of SR. The study sites located closely to Arctic Circle were related to different latitudes, including 56° N (SAE site, Krasnoyarsk), 60° N (ZOTTO site, Zotino), and 64° N (Tura site, Evenkia). Study sites were selected in forest ecosystems (> 41 years old) and represented a wide range of the climate, stand, permafrost availability, and soil types. However, the mean seasonal values of SR (mean ± SD) varied in a relatively narrow range from 2.11 ± 0.69 in the forest-steppe zone (SAE) to 2.82 ± 1.77 μmol CO2 m−2 s−1 in northern larch taiga (Tura). Nevertheless, a twofold difference in the duration of growing season among northern and southern locations results in a variation of total seasonal CO2 emissions (mean ± SD) from 216 ± 136 g C m−2 in larch stands of northern taiga to 369 ± 115 g C m−2 in larch stands of southern forest-steppe zone. Evaluation of the multiannual dynamics of SR over the past 1.5 decades (1995–2010) showed the escalation of SR in the permafrost larch stands (Tura) in 2005–2010. That has been coupled with the enhanced activity of the soil heterotrophic microbiota in 2007–2010. Our study highlights the importance of further monitoring of SR in permafrost Siberian ecosystems.
Landslide Science and Practice, 2013
In forested ecosystems developed on permafrost, solifluction processes are widespread, occur in y... more In forested ecosystems developed on permafrost, solifluction processes are widespread, occur in years of above average summer-autumn precipitation and can cover up to 20 % of total area of slopes adjacent to rivers. This process is the most destructive natural disturbance event resulting in complete disappearance of initial ecosystems (vegetation cover and soil). To analyze postsliding ecosystem succession, sites of two ages (5 and 35 years old) after solifluction were chosen along with Nizhnyaya (Lower) Tunguska River valley. Results show that regeneration of soil respiration and eco-physiological status of microbial communities in soil during postsolifluction succession starts with vegetation re-establishment. As long as ecosystems regenerate, accumulated litter contains the main pool of microorganisms, though microbial biomass of 35-year-old solifluction area does not reach the value of microbial biomass in control plots. Therefore, forested ecosystems in permafrost zone after landsliding requires decades for final successful restoration of soil respiration and the microbial community.
Eurasian Journal of …, 2002
This study examined how permafrost soils affect morphology, anatomy and metabolism of Dahurian la... more This study examined how permafrost soils affect morphology, anatomy and metabolism of Dahurian larch (L.. gmelinii) roots at five different sites in northern parts of Central Siberia. Field monitoring using custom-made rhizotrons showed that there were ...
Release of dissolved organic carbon (DOC) from boreal forest ecosystems of central Siberia includ... more Release of dissolved organic carbon (DOC) from boreal forest ecosystems of central Siberia including permafrost, mountain and south taiga zones was compared in terms of influence of sitespecific environmental conditions. Pinus sylvestris (southern part), Abies sibirica (mountain) and Larix gmelinii (permafrost) have different adaptational strategies and cover areas with unique hydroclimatic conditions. Among forest patterns, litter is characterized by large dissolved organic carbon DOC flux compared to that of forest floor vegetation and throughfall. Precipitation and temperature of decomposing layers were found to be the most important factors determining DOC release. Insufficient heat supply has led to a sharp decrease in extractable DOC contents in the forest floor and litter in the larch stand. DOC influx in throughfall was also important for the DOC dynamics in the organic horizon. The formation of impermeable layers of permafrost and basalt bedrock have resulted in a high DOC concentration in stream water in the watershed. Precipitation magnitude considerably affected DOC output in stream water. After long-term rainfall, DOC flux in stream water in the larch basin reached 38 mgC'm-2 d-I, almost IOO-fold higher than that during the low flow period.
Forests
The observed high spatial variation in soil respiration (SR) and associated parameters emphasized... more The observed high spatial variation in soil respiration (SR) and associated parameters emphasized the importance of SR heterogeneity at high latitudes and the involvement of many factors in its regulation, especially within fire-affected areas. The problem of estimating CO2 emissions during post-fire recovery in high-latitude ecosystems addresses the mutual influence of wildfires and climate change on the C cycle. Despite its importance, especially in permafrost regions because of their vulnerability, the mutual influence of these factors on CO2 dynamics has rarely been studied. Thus, we aimed to understand the dynamics of soil respiration (SR) in wildfire-affected larch recovery successions. We analyzed 16-year data (1995–2010) on SR and associated soil, biological, and environmental parameters obtained during several field studies in larch stands of different ages (0–276 years) in the Krasnoyarsk region (Russia). We observed a high variation in SR and related parameters among the ...