Liudmila Mukhortova - Academia.edu (original) (raw)
Books by Liudmila Mukhortova
Folia Forestalia Polonica 2012, Vol. 54 (2) Title: Carbon and nutrient release during decompositi... more Folia Forestalia Polonica 2012, Vol. 54 (2)
Title: Carbon and nutrient release during decomposition of coarse woody debris in forest ecosystems of Central Siberia, Author(s): Liudmila V. Mukhortova; Title: Forest biomass estimation by the use of airborne laser scanning and in situ fieldmap measurement in a spruce forest stand, Author(s): Marius Petrila, Bogdan Apostol, Vladimir Gancz, Adrian Loren, Diana Silaghi; Title: How will climate change impact biomass increment by Norway spruce stands in Western Beskids?, Author(s): Jarosław Socha, Grzegorz Durło; Title: Control of adult cockchafers Melolontha spp. with Mospilan 20 SP, Author(s): Barbara Głowacka, Alicja Sierpińska; Title: Forests and their importance in the global carbon and nitrogen balance – a review with reflections, Author(s): Bengt Nihlgård; Title: Two-phased inventory of standing volume in mountain forests with the use of aerial photographs, Author(s): Besim Hoxha; Title: Carbon stocks in coarse woody debris in the middle taiga ecosystems located along the Yenisei river, Author(s): Alexander V. Klimchenko, Sergey V. Verkhovets
Papers by Liudmila Mukhortova
Scientific Data
Spatially explicit information on forest management at a global scale is critical for understandi... more Spatially explicit information on forest management at a global scale is critical for understanding the status of forests, for planning sustainable forest management and restoration, and conservation activities. Here, we produce the first reference data set and a prototype of a globally consistent forest management map with high spatial detail on the most prevalent forest management classes such as intact forests, managed forests with natural regeneration, planted forests, plantation forest (rotation up to 15 years), oil palm plantations, and agroforestry. We developed the reference dataset of 226 K unique locations through a series of expert and crowdsourcing campaigns using Geo-Wiki (https://www.geo-wiki.org/). We then combined the reference samples with time series from PROBA-V satellite imagery to create a global wall-to-wall map of forest management at a 100 m resolution for the year 2015, with forest management class accuracies ranging from 58% to 80%. The reference data set a...
Science of The Total Environment
Forests
Carbon dioxide (CO2) and methane (CH4) are recognized as the main greenhouse gases causing climat... more Carbon dioxide (CO2) and methane (CH4) are recognized as the main greenhouse gases causing climate warming. In forest ecosystems, the death of trees leads to the formation of coarse woody debris (CWD) that is one of the sources of greenhouse gas emissions due to wood decomposition. We quantified the CO2 and CH4 fluxes from CWD of larch (Larix gmelinii (Rupr.)) and birch (Betula tortuosa Ledeb.) collected in the northern boreal forests of Central Siberia. The CWD samples were incubated at +5, +15 and +25 °C. The CO2 and CH4 fluxes showed strong correlations with temperature, moisture, decomposition stage and the type of wood’s rot. The temperature coefficient Q10 indicated higher temperature sensitivity of CO2 flux within the temperature interval from +5 to +15 °C than from +15 to +25 °C. Methane flux had higher temperature sensitivity within the interval from +15 to +25 °C. It was found that, in boreal forests, CWD of early decay stage can serve as a source of methane to the atmosph...
Scientific Data
Forest biomass is an essential indicator for monitoring the Earth’s ecosystems and climate. It is... more Forest biomass is an essential indicator for monitoring the Earth’s ecosystems and climate. It is a critical input to greenhouse gas accounting, estimation of carbon losses and forest degradation, assessment of renewable energy potential, and for developing climate change mitigation policies such as REDD+, among others. Wall-to-wall mapping of aboveground biomass (AGB) is now possible with satellite remote sensing (RS). However, RS methods require extant, up-to-date, reliable, representative and comparable in situ data for calibration and validation. Here, we present the Forest Observation System (FOS) initiative, an international cooperation to establish and maintain a global in situ forest biomass database. AGB and canopy height estimates with their associated uncertainties are derived at a 0.25 ha scale from field measurements made in permanent research plots across the world’s forests. All plot estimates are geolocated and have a size that allows for direct comparison with many ...
Bosque
La explotación forestal es un importante disturbio de origen humano que afecta el balance de carb... more La explotación forestal es un importante disturbio de origen humano que afecta el balance de carbono en ecosistemas forestales. Este estudio se concentró en los cambios de las reservas de carbono post-cosecha de rodales de pino silvestre (Pinus sylvestris) y abeto siberiano (Abies sibirica). Para entender la recuperación del balance de carbono después de la cosecha, se midió el stock y flujo de carbono en diferentes momentos posterior a la cosecha. En ambos rodales explotados, la contribución de la fitomasa forestal al balance de carbono disminuyó drásticamente, mientras que la reserva de carbono en los residuos leñosos de gran tamaño (CWD) exhibió un marcado incremento. Sesenta años después de la cosecha, el almacenamiento de carbono en rodales de pino silvestre fue casi del 70 % respecto a lo de antes de cosecha. El radio entre la fitomasa y la materia orgánica del suelo fue el mismo al de antes de la perturbación. Si bien la fitomasa de carbono mostró una tendencia similar en el ...
Our study was conducted on 17 forest sample plots in the forest-tundra zone of Central Siberia, K... more Our study was conducted on 17 forest sample plots in the forest-tundra zone of Central Siberia, Krasnoyarsk region, Russia. They were covered by larch/feather moss/shrub and larch/grass forest types growing on cryozems and podburs (Cryosols). The investigation was aimed at estimating soil organic matter storage and structure in forest ecosystems growing along the northern tree line. Such ecosystems have low rates of exchange processes and biological productivity. Estimating soil carbon in these forest types is important for a deeper understanding of their role in biogeochemical cycles and forecasting consequences of climate changes. Soil organic matter was divided into pools by biodegradation resistance level and, hence, different roles of these pools in biological cycles. The soil organic matter was divided into an easily mineralizable (LMOM) fraction, which includes labile (insoluble) (LOM) and mobile (soluble) (MOM) organic compounds, and a stable organic matter fraction that is ...
A model cluster for soil respiration assessment was developed. It is based on 3592 in-situ measur... more A model cluster for soil respiration assessment was developed. It is based on 3592 in-situ measurements and considered climatic parameters, soil and vegetation types, land use, vegetation productivity and disturbances. Heterotrophic efflux from Russian soil was assessed as 3.47 Pg C year -1 or 215 g C m -2 year -1 .
Contemporary Problems of Ecology, 2012
ABSTRACT A change in the mass and composition of organic matter in the phytomass and soil of pine... more ABSTRACT A change in the mass and composition of organic matter in the phytomass and soil of pine forests affected by mid-intensity and high-intensity fires is considered. It is shown that a mid-intensity fire did not catastrophically affect the pool of carbon in the middle-aged pine forests of the subtaiga forest-steppe and the taiga higher belt areas in the southwest of the Baikal region. Five years after a high-intensity fire, the carbon reserves in a mature taiga pine forest remain 20% lower than in an unaffected pine forest. Compared with the reference figures, the mass of C and soil cover in the stand phytomass decreased by 18 and 63%, respectively. In the easily mineralizable fraction of organic matter, the reserves of carbon decreased by half owing to burnout of waste wood (by 64%) and root detritus (by 50% compared with the reference tree stand figures).
Contemporary Problems of Ecology, 2012
The results of the study of the qualitative composition and relative content of highly volatile c... more The results of the study of the qualitative composition and relative content of highly volatile com pounds from the needles in two natural pine populations located in the forest steppe zone in the south of Central Siberia are presented. Altogether, 89 components were isolated. Analysis of intra and interpopula tion variability of 31 terpenoids (mono and sesquiterpene fractions) was conducted. The spatial structure of the variance of features was analyzed. Significant interpopulation differences in the content of most com pounds were registered. It was determined that, as growing conditions deteriorate, the mass fraction of lighter monoterpene compounds (especially α pinene) is increased within populations, and qualitative diversity of the components of essential oils is decreased. The groups of terpenoids, the relative content of which is to a different degree associated with interpopulation differences and variety of the growing conditions of trees within populations, were isolated.
Contemporary Problems of Ecology, 2013
ABSTRACT The hygroscopic properties of the litter of coniferous (larch and pine) and deciduous (a... more ABSTRACT The hygroscopic properties of the litter of coniferous (larch and pine) and deciduous (aspen and birch) stands were studied in terms of isotherms of water-vapor sorption and with use of thermal analysis methods (TG, DSC). It was found that most of the monolayer capacity belongs to subhorizons OL and OF of the larch and pine forest litters. The larch plantation litter has the highest hydrophilicity. DSC results show that the water is most strongly associated with the litter substance in subhorizon OL in coniferous plantations and OH in deciduous ones. The moisture supply in the litter of coniferous stands is greater than in deciduous ones.
NATO Science Series IV: Earth and Environmental Sciences, 2005
The forest floor (O horizon) is a major pool of organic matter in many forests, comprised of a wi... more The forest floor (O horizon) is a major pool of organic matter in many forests, comprised of a wide range of materials that vary in chemistry and morphology. The processing of fresh detritus progresses with gradual degradation under the influence of biotic and abiotic factors, leading to decreasing particle size and carbon:nitrogen ratios.
Bosque (Valdivia), 2012
Forest harvesting is a major human-caused disturbance affecting carbon budgets in forest ecosyste... more Forest harvesting is a major human-caused disturbance affecting carbon budgets in forest ecosystems. This study was concerned with post-logging carbon pool changes in Scots pine (Pinussylvestris )and Siberian fir (Abiessibirica) stands. To understand carbon budget recovery trends following logging, carbon stock and fluxes were measured in stands differing in time since logging. In both Scots pine and fir stands disturbed by logging, the tree phytomass contribution to the carbon budget decreased drastically, whereas the coarse woody debris (CWD) carbon pool exhibited a marked increase. Sixty years following logging, the Scots pine stand carbon storage was almost 70 % of that prior to logging and the ratio between the phytomass and soil organic matter was the same as before the disturbance. While the phytomass carbon showed a similar trend in the fir stand of the same age, it was less than on the control stand. In a 50-55-year-old fir stand, 26 years since harvesting, thephytomasscarbon recovered only by 15 %. Siberian fir and Scots pine logging sites differed in CWD loading and decomposition rate. The phytomass dynamics and CWD loading values obtained suggest that Scots pine stands which have experienced logging are most likely carbon sinks, as was clear from the phytomass production exceeding organic matter decomposition-caused fluxes. Conversely, logged fir ecosystems are likely to be sources of carbon to the atmosphere due to a large CWD loading, faster rate of its decomposition, and slow phytomass increment.
Contemporary Problems of Ecology, 2014
The potential ecological ranges of two forest forming species of light coniferous forests are stu... more The potential ecological ranges of two forest forming species of light coniferous forests are studied in the light of the soil ecology data for Pinus sylvestris L., Larix sibirica Ledeb. L. gmelinii (Rupr.) Rupr. and geography of suitability of soils for forest growth in Central Siberia. It is found out that about 80% of the ana lyzed territory of Central Siberia is suitable for larch and pine by soil conditions. Pine and larch forests cur rently occupy about 12 and 32% of the potentially suitable soils of the region, respectively. The specifics of distribution of the current larch and pine forests on soils with different forest suitability is noticed and the role of soil and climatic factors in distribution of light coniferous species is assessed.
The flux of CO2 from the soil to the atmosphere -soil respiration (RS), is one of the least known... more The flux of CO2 from the soil to the atmosphere -soil respiration (RS), is one of the least known components of the terrestrial carbon cycle. RS depends on many factors and varies substantially in time and space. High uncertainty of RS flux valuation leads to a wide range of reported carbon budget estimates for Russian forests. We developed a modeling system for assessing soil carbon stock and heterotrophic soil respiration based on a possible maximum of relevant input indicators. The most comprehensive databases of RS in situ measurements focused on Northern Eurasia (780 records for the region) has been used. A statistical model for assessing RS of Russian forests and its separation in autotrophic and heterotrophic parts were elaborated based on in situ measurements, climate parameters, soil and land cover datasets. The spatial resolution of the model is 1 km 2 . Russian forest soil accumulated 144.5 Pg C (or 17.6 kg C m -2 ) in 1 m depth, including 8.3 Pg C (or 1.0 kg C m -2 ) in the labile topsoil organic layer. The total heterotrophic soil respiration (RH) flux for the Russian forest is estimated at 1.7 Pg C yr -1 (206 g C m -2 yr -1 ) that comprises 65% of Net Primary Production (NPP) and together with NPP is one of two major components of the net ecosystem carbon balance comprising on average 546 Tg C yr -1 (66 g C m -2 yr -1 ) for . Interannual variability or RH in 1996 was estimated at 4.1% for forests of the whole country and typically from 5-11% for large individual regions with an average linear trend +0.2% per year. The uncertainty of annual average of RH was estimated at 8% (confidential interval 0.9).
Biology Bulletin, 2005
The dynamics of litter stock, microbial biomass, and composition and structure of microbial commu... more The dynamics of litter stock, microbial biomass, and composition and structure of microbial communities, were studied in the course of soil organic matter transformation during vegetation season. The dynamics of litter stock in coniferous and deciduous forests proved to correlate with the biomass and total abundance of microorganisms, particularly, with the proportion of microfungi in the microbial community.
Biology Bulletin, 2009
Changes in the composition of wood organic matter in dead-standing spruce and larch trees dependi... more Changes in the composition of wood organic matter in dead-standing spruce and larch trees depending on the period after their death have been studied in the north of Central Siberia. The period after tree death has been estimated by means of cross-dating. The results show that changes in the composition of wood organic matter in 63% of cases are contingent on tree species. Wood decomposition in dead-standing trees is accompanied by an increase in the contents of alkali-soluble organic compounds. Lignin oxidation in larch begins approximately 80 years after tree death, whereas its transformation in spruce begins not earlier than after 100 years. In the forest-tundra of Central Siberia, the rate of wood organic matter transformation in dead-standing trees is one to two orders of magnitude lower than in fallen wood, which accounts for their role as a long-term store of carbon and mineral elements in these ecosystems.
Biology Bulletin, 2010
The dynamics of organic matter accumulated in the soil and main vegetation elements was ana lyzed... more The dynamics of organic matter accumulated in the soil and main vegetation elements was ana lyzed for post logging forest ecosystem succession series in eastern Baikal region. The phytomass was found to allocate up 63 and 50% of carbon in undisturbed Scots pine and fir stands, respectively. The post logging phytomass contribution to the total carbon pool appeared to decrease down to 16% in Scots pine and 6% in fir stands. In Scots pine stands, carbon storage was determined to account for almost 70% of the initial carbon 60 years after logging. In 50 to 55 year old fir stands, carbon recovered its initial pool only by 10%. Soil car bon recorded in recently logged Scots pine and fir sites appeared to be 5 and 16 times that accumulated in the phytomass, respectively. The ratio between phytomass carbon and soil organic matter recovered back to the prelogging level in Scots pine stands by the age of 50-60 years. While phytomass carbon also increased in fir stand of the same age, it did not reach the level of the control stand.
Eurasian Soil Science, 2013
An automated information system making it possible to estimate spatial distribution of soil organ... more An automated information system making it possible to estimate spatial distribution of soil organic carbon pool with a high spatial resolution (1 km 2 ) has been developed. According to the obtained esti mates, the total pool of organic carbon in the 1 m deep soil layer on the territory of Russia reaches 317.1 Pg; the average organic carbon density in this layer for the entire Russia constitutes 19.2 kg C/m 2 . Of this amount, 14.4 Pg (or 0.90 kg C/m 2 ) is stored in the litter horizon. The developed algorithm allows us to refine the results with the acquisition of new data on soils, vegetation, and the degree of their disturbance, which is particularly important in the changing world.
Folia Forestalia Polonica 2012, Vol. 54 (2) Title: Carbon and nutrient release during decompositi... more Folia Forestalia Polonica 2012, Vol. 54 (2)
Title: Carbon and nutrient release during decomposition of coarse woody debris in forest ecosystems of Central Siberia, Author(s): Liudmila V. Mukhortova; Title: Forest biomass estimation by the use of airborne laser scanning and in situ fieldmap measurement in a spruce forest stand, Author(s): Marius Petrila, Bogdan Apostol, Vladimir Gancz, Adrian Loren, Diana Silaghi; Title: How will climate change impact biomass increment by Norway spruce stands in Western Beskids?, Author(s): Jarosław Socha, Grzegorz Durło; Title: Control of adult cockchafers Melolontha spp. with Mospilan 20 SP, Author(s): Barbara Głowacka, Alicja Sierpińska; Title: Forests and their importance in the global carbon and nitrogen balance – a review with reflections, Author(s): Bengt Nihlgård; Title: Two-phased inventory of standing volume in mountain forests with the use of aerial photographs, Author(s): Besim Hoxha; Title: Carbon stocks in coarse woody debris in the middle taiga ecosystems located along the Yenisei river, Author(s): Alexander V. Klimchenko, Sergey V. Verkhovets
Scientific Data
Spatially explicit information on forest management at a global scale is critical for understandi... more Spatially explicit information on forest management at a global scale is critical for understanding the status of forests, for planning sustainable forest management and restoration, and conservation activities. Here, we produce the first reference data set and a prototype of a globally consistent forest management map with high spatial detail on the most prevalent forest management classes such as intact forests, managed forests with natural regeneration, planted forests, plantation forest (rotation up to 15 years), oil palm plantations, and agroforestry. We developed the reference dataset of 226 K unique locations through a series of expert and crowdsourcing campaigns using Geo-Wiki (https://www.geo-wiki.org/). We then combined the reference samples with time series from PROBA-V satellite imagery to create a global wall-to-wall map of forest management at a 100 m resolution for the year 2015, with forest management class accuracies ranging from 58% to 80%. The reference data set a...
Science of The Total Environment
Forests
Carbon dioxide (CO2) and methane (CH4) are recognized as the main greenhouse gases causing climat... more Carbon dioxide (CO2) and methane (CH4) are recognized as the main greenhouse gases causing climate warming. In forest ecosystems, the death of trees leads to the formation of coarse woody debris (CWD) that is one of the sources of greenhouse gas emissions due to wood decomposition. We quantified the CO2 and CH4 fluxes from CWD of larch (Larix gmelinii (Rupr.)) and birch (Betula tortuosa Ledeb.) collected in the northern boreal forests of Central Siberia. The CWD samples were incubated at +5, +15 and +25 °C. The CO2 and CH4 fluxes showed strong correlations with temperature, moisture, decomposition stage and the type of wood’s rot. The temperature coefficient Q10 indicated higher temperature sensitivity of CO2 flux within the temperature interval from +5 to +15 °C than from +15 to +25 °C. Methane flux had higher temperature sensitivity within the interval from +15 to +25 °C. It was found that, in boreal forests, CWD of early decay stage can serve as a source of methane to the atmosph...
Scientific Data
Forest biomass is an essential indicator for monitoring the Earth’s ecosystems and climate. It is... more Forest biomass is an essential indicator for monitoring the Earth’s ecosystems and climate. It is a critical input to greenhouse gas accounting, estimation of carbon losses and forest degradation, assessment of renewable energy potential, and for developing climate change mitigation policies such as REDD+, among others. Wall-to-wall mapping of aboveground biomass (AGB) is now possible with satellite remote sensing (RS). However, RS methods require extant, up-to-date, reliable, representative and comparable in situ data for calibration and validation. Here, we present the Forest Observation System (FOS) initiative, an international cooperation to establish and maintain a global in situ forest biomass database. AGB and canopy height estimates with their associated uncertainties are derived at a 0.25 ha scale from field measurements made in permanent research plots across the world’s forests. All plot estimates are geolocated and have a size that allows for direct comparison with many ...
Bosque
La explotación forestal es un importante disturbio de origen humano que afecta el balance de carb... more La explotación forestal es un importante disturbio de origen humano que afecta el balance de carbono en ecosistemas forestales. Este estudio se concentró en los cambios de las reservas de carbono post-cosecha de rodales de pino silvestre (Pinus sylvestris) y abeto siberiano (Abies sibirica). Para entender la recuperación del balance de carbono después de la cosecha, se midió el stock y flujo de carbono en diferentes momentos posterior a la cosecha. En ambos rodales explotados, la contribución de la fitomasa forestal al balance de carbono disminuyó drásticamente, mientras que la reserva de carbono en los residuos leñosos de gran tamaño (CWD) exhibió un marcado incremento. Sesenta años después de la cosecha, el almacenamiento de carbono en rodales de pino silvestre fue casi del 70 % respecto a lo de antes de cosecha. El radio entre la fitomasa y la materia orgánica del suelo fue el mismo al de antes de la perturbación. Si bien la fitomasa de carbono mostró una tendencia similar en el ...
Our study was conducted on 17 forest sample plots in the forest-tundra zone of Central Siberia, K... more Our study was conducted on 17 forest sample plots in the forest-tundra zone of Central Siberia, Krasnoyarsk region, Russia. They were covered by larch/feather moss/shrub and larch/grass forest types growing on cryozems and podburs (Cryosols). The investigation was aimed at estimating soil organic matter storage and structure in forest ecosystems growing along the northern tree line. Such ecosystems have low rates of exchange processes and biological productivity. Estimating soil carbon in these forest types is important for a deeper understanding of their role in biogeochemical cycles and forecasting consequences of climate changes. Soil organic matter was divided into pools by biodegradation resistance level and, hence, different roles of these pools in biological cycles. The soil organic matter was divided into an easily mineralizable (LMOM) fraction, which includes labile (insoluble) (LOM) and mobile (soluble) (MOM) organic compounds, and a stable organic matter fraction that is ...
A model cluster for soil respiration assessment was developed. It is based on 3592 in-situ measur... more A model cluster for soil respiration assessment was developed. It is based on 3592 in-situ measurements and considered climatic parameters, soil and vegetation types, land use, vegetation productivity and disturbances. Heterotrophic efflux from Russian soil was assessed as 3.47 Pg C year -1 or 215 g C m -2 year -1 .
Contemporary Problems of Ecology, 2012
ABSTRACT A change in the mass and composition of organic matter in the phytomass and soil of pine... more ABSTRACT A change in the mass and composition of organic matter in the phytomass and soil of pine forests affected by mid-intensity and high-intensity fires is considered. It is shown that a mid-intensity fire did not catastrophically affect the pool of carbon in the middle-aged pine forests of the subtaiga forest-steppe and the taiga higher belt areas in the southwest of the Baikal region. Five years after a high-intensity fire, the carbon reserves in a mature taiga pine forest remain 20% lower than in an unaffected pine forest. Compared with the reference figures, the mass of C and soil cover in the stand phytomass decreased by 18 and 63%, respectively. In the easily mineralizable fraction of organic matter, the reserves of carbon decreased by half owing to burnout of waste wood (by 64%) and root detritus (by 50% compared with the reference tree stand figures).
Contemporary Problems of Ecology, 2012
The results of the study of the qualitative composition and relative content of highly volatile c... more The results of the study of the qualitative composition and relative content of highly volatile com pounds from the needles in two natural pine populations located in the forest steppe zone in the south of Central Siberia are presented. Altogether, 89 components were isolated. Analysis of intra and interpopula tion variability of 31 terpenoids (mono and sesquiterpene fractions) was conducted. The spatial structure of the variance of features was analyzed. Significant interpopulation differences in the content of most com pounds were registered. It was determined that, as growing conditions deteriorate, the mass fraction of lighter monoterpene compounds (especially α pinene) is increased within populations, and qualitative diversity of the components of essential oils is decreased. The groups of terpenoids, the relative content of which is to a different degree associated with interpopulation differences and variety of the growing conditions of trees within populations, were isolated.
Contemporary Problems of Ecology, 2013
ABSTRACT The hygroscopic properties of the litter of coniferous (larch and pine) and deciduous (a... more ABSTRACT The hygroscopic properties of the litter of coniferous (larch and pine) and deciduous (aspen and birch) stands were studied in terms of isotherms of water-vapor sorption and with use of thermal analysis methods (TG, DSC). It was found that most of the monolayer capacity belongs to subhorizons OL and OF of the larch and pine forest litters. The larch plantation litter has the highest hydrophilicity. DSC results show that the water is most strongly associated with the litter substance in subhorizon OL in coniferous plantations and OH in deciduous ones. The moisture supply in the litter of coniferous stands is greater than in deciduous ones.
NATO Science Series IV: Earth and Environmental Sciences, 2005
The forest floor (O horizon) is a major pool of organic matter in many forests, comprised of a wi... more The forest floor (O horizon) is a major pool of organic matter in many forests, comprised of a wide range of materials that vary in chemistry and morphology. The processing of fresh detritus progresses with gradual degradation under the influence of biotic and abiotic factors, leading to decreasing particle size and carbon:nitrogen ratios.
Bosque (Valdivia), 2012
Forest harvesting is a major human-caused disturbance affecting carbon budgets in forest ecosyste... more Forest harvesting is a major human-caused disturbance affecting carbon budgets in forest ecosystems. This study was concerned with post-logging carbon pool changes in Scots pine (Pinussylvestris )and Siberian fir (Abiessibirica) stands. To understand carbon budget recovery trends following logging, carbon stock and fluxes were measured in stands differing in time since logging. In both Scots pine and fir stands disturbed by logging, the tree phytomass contribution to the carbon budget decreased drastically, whereas the coarse woody debris (CWD) carbon pool exhibited a marked increase. Sixty years following logging, the Scots pine stand carbon storage was almost 70 % of that prior to logging and the ratio between the phytomass and soil organic matter was the same as before the disturbance. While the phytomass carbon showed a similar trend in the fir stand of the same age, it was less than on the control stand. In a 50-55-year-old fir stand, 26 years since harvesting, thephytomasscarbon recovered only by 15 %. Siberian fir and Scots pine logging sites differed in CWD loading and decomposition rate. The phytomass dynamics and CWD loading values obtained suggest that Scots pine stands which have experienced logging are most likely carbon sinks, as was clear from the phytomass production exceeding organic matter decomposition-caused fluxes. Conversely, logged fir ecosystems are likely to be sources of carbon to the atmosphere due to a large CWD loading, faster rate of its decomposition, and slow phytomass increment.
Contemporary Problems of Ecology, 2014
The potential ecological ranges of two forest forming species of light coniferous forests are stu... more The potential ecological ranges of two forest forming species of light coniferous forests are studied in the light of the soil ecology data for Pinus sylvestris L., Larix sibirica Ledeb. L. gmelinii (Rupr.) Rupr. and geography of suitability of soils for forest growth in Central Siberia. It is found out that about 80% of the ana lyzed territory of Central Siberia is suitable for larch and pine by soil conditions. Pine and larch forests cur rently occupy about 12 and 32% of the potentially suitable soils of the region, respectively. The specifics of distribution of the current larch and pine forests on soils with different forest suitability is noticed and the role of soil and climatic factors in distribution of light coniferous species is assessed.
The flux of CO2 from the soil to the atmosphere -soil respiration (RS), is one of the least known... more The flux of CO2 from the soil to the atmosphere -soil respiration (RS), is one of the least known components of the terrestrial carbon cycle. RS depends on many factors and varies substantially in time and space. High uncertainty of RS flux valuation leads to a wide range of reported carbon budget estimates for Russian forests. We developed a modeling system for assessing soil carbon stock and heterotrophic soil respiration based on a possible maximum of relevant input indicators. The most comprehensive databases of RS in situ measurements focused on Northern Eurasia (780 records for the region) has been used. A statistical model for assessing RS of Russian forests and its separation in autotrophic and heterotrophic parts were elaborated based on in situ measurements, climate parameters, soil and land cover datasets. The spatial resolution of the model is 1 km 2 . Russian forest soil accumulated 144.5 Pg C (or 17.6 kg C m -2 ) in 1 m depth, including 8.3 Pg C (or 1.0 kg C m -2 ) in the labile topsoil organic layer. The total heterotrophic soil respiration (RH) flux for the Russian forest is estimated at 1.7 Pg C yr -1 (206 g C m -2 yr -1 ) that comprises 65% of Net Primary Production (NPP) and together with NPP is one of two major components of the net ecosystem carbon balance comprising on average 546 Tg C yr -1 (66 g C m -2 yr -1 ) for . Interannual variability or RH in 1996 was estimated at 4.1% for forests of the whole country and typically from 5-11% for large individual regions with an average linear trend +0.2% per year. The uncertainty of annual average of RH was estimated at 8% (confidential interval 0.9).
Biology Bulletin, 2005
The dynamics of litter stock, microbial biomass, and composition and structure of microbial commu... more The dynamics of litter stock, microbial biomass, and composition and structure of microbial communities, were studied in the course of soil organic matter transformation during vegetation season. The dynamics of litter stock in coniferous and deciduous forests proved to correlate with the biomass and total abundance of microorganisms, particularly, with the proportion of microfungi in the microbial community.
Biology Bulletin, 2009
Changes in the composition of wood organic matter in dead-standing spruce and larch trees dependi... more Changes in the composition of wood organic matter in dead-standing spruce and larch trees depending on the period after their death have been studied in the north of Central Siberia. The period after tree death has been estimated by means of cross-dating. The results show that changes in the composition of wood organic matter in 63% of cases are contingent on tree species. Wood decomposition in dead-standing trees is accompanied by an increase in the contents of alkali-soluble organic compounds. Lignin oxidation in larch begins approximately 80 years after tree death, whereas its transformation in spruce begins not earlier than after 100 years. In the forest-tundra of Central Siberia, the rate of wood organic matter transformation in dead-standing trees is one to two orders of magnitude lower than in fallen wood, which accounts for their role as a long-term store of carbon and mineral elements in these ecosystems.
Biology Bulletin, 2010
The dynamics of organic matter accumulated in the soil and main vegetation elements was ana lyzed... more The dynamics of organic matter accumulated in the soil and main vegetation elements was ana lyzed for post logging forest ecosystem succession series in eastern Baikal region. The phytomass was found to allocate up 63 and 50% of carbon in undisturbed Scots pine and fir stands, respectively. The post logging phytomass contribution to the total carbon pool appeared to decrease down to 16% in Scots pine and 6% in fir stands. In Scots pine stands, carbon storage was determined to account for almost 70% of the initial carbon 60 years after logging. In 50 to 55 year old fir stands, carbon recovered its initial pool only by 10%. Soil car bon recorded in recently logged Scots pine and fir sites appeared to be 5 and 16 times that accumulated in the phytomass, respectively. The ratio between phytomass carbon and soil organic matter recovered back to the prelogging level in Scots pine stands by the age of 50-60 years. While phytomass carbon also increased in fir stand of the same age, it did not reach the level of the control stand.
Eurasian Soil Science, 2013
An automated information system making it possible to estimate spatial distribution of soil organ... more An automated information system making it possible to estimate spatial distribution of soil organic carbon pool with a high spatial resolution (1 km 2 ) has been developed. According to the obtained esti mates, the total pool of organic carbon in the 1 m deep soil layer on the territory of Russia reaches 317.1 Pg; the average organic carbon density in this layer for the entire Russia constitutes 19.2 kg C/m 2 . Of this amount, 14.4 Pg (or 0.90 kg C/m 2 ) is stored in the litter horizon. The developed algorithm allows us to refine the results with the acquisition of new data on soils, vegetation, and the degree of their disturbance, which is particularly important in the changing world.
Почвоведение, 2013
ABSTRACT Разработана автоматизированная информационная система, позволяющая оценить с высоким раз... more ABSTRACT Разработана автоматизированная информационная система, позволяющая оценить с высоким разрешением (1 км2) пространственно распределенные запасы органического углерода в почвах России. Согласно полученным оценкам, общие запасы органического углерода в однометровом слое почвы на территории Российской Федерации составляют 317.1 Пг (или в среднем для территории страны – 19.2 кг С/м2), в том числе 14.4 Пг С (или 0.90 кг С/м2) в подстилке. Предлагаемый алгоритм позволяет уточнять результаты по мере получения новых сведений о почвах, растительности и их нарушениях, что особенно важно в современном меняющемся мире.