E. A. Golovatskaya

Russian Academy of Sciences | RAS · Institute of Monitoring of Climatic and Ecological Systems of the Siberian Branch

The aim of the study. Assessment of the phytomass stocks and decomposition rate of peat-forming plants’ residues in peat deposits of natural and post-pyrogenic peatlands at the initial stages of decomposition. Location and time of the study. The study was carried out in 2022 (May-September) at two oligotrophic bog sites: “Bakcharskoye” (field stati...

The aim of the study. Assessment of changes in the nitrogen isotopic composition (δ15N) during the decomposition of the main peat-forming plants’ litter in peat of oligotrophic bog ecosystems in the southern taiga subzone of West Siberia. Location and time of the study. The studies were carried out in 2019–2021 in two oligotrophic bogs: “Bakcharsko...

The decomposition rate of plant residues is determined by both abiotic (temperature, moisture) and biotic factors (biochemical composition). To separate the contribution of each factor to the decomposition process, long-term incubation experiments under controlled conditions are required. Two-year incubation experiments were conducted with various...

The aim of the study. Assessment of heavy metals (Zn, Cd, Pb, Cu) dynamic during the decomposition of Sphagnum fuscum L. in native, drained and post-pyrogenic oligotrophic peatlands. Location and time of the study. The study was carried out in 2019–2021 in two oligotrophic bogs: “Bakcharskoye” (field station “Vasyuganye” (IMCES SB RAS)) and “Iksins...

The aim of the study. Development of the methodical approach to the estimation of carbon stocks in peat deposits of West Siberia, based on the analysis of available published and archived materials, allowing rapid reassessment of carbon stocks once new data is acquired. Methods. Analysis of published data on carbon content and methodical approaches...

In this study, we describe the variation in δ13C value in the litter of two species of peat-forming plants: Sphagnum fuscum and Eriophorum vaginatum, during 3 years of field decomposition in oligotrophic bog ecosystems drained for the purpose of forest melioration and fire affected and at the stage of post-pyrogenic restoration. Litterbags were per...

The inland aquatic ecosystems play a significant role in the global carbon cycle, owing to the metabolism of terrestrially derived organic matter as it moves through fluvial networks along the water continuum. During this transport, dissolved organic matter (DOM) is microbial processed and released into the atmosphere, but the degree and intensity...

Palaeoenvironmental reconstructions from peat are strongly focused on ombrotrophic mires, but this study demonstrates that eutrophic mires can also be used. A multi‐proxy approach was applied to a eutrophic mire on a floodplain terrace in the southern taiga of West Siberia. The results of the reconstruction were considered in the wide geographic co...

The aim of the study was to assess carbon reserves and balance in oligotrophic and eutrophic bogs of the souther- taiga subzone of West Siberia. Location and time of the study. The study was carried out at the field station "Vasyuganye" (56° 57′ N, 82° 30′ E) of the Institute for Monitoring Climatic and Ecological Systems of the Siberian Branch of...

The areas of forest loss from fires in the Verkhneketsky district of the Tomsk region are considered. Pollutant emissions from fires are calculated. It is found that smoke aerosols from fires in 2012 and 2016 significantly exceed in mass technogenic emissions from stationary sources in the Verkhneketsky district. Based on the CALIOP lidar data, the...

The majority of organic carbon (OC), nutrients, and dissolved trace elements in soil porewaters are present in the form of colloids which determine element transport, bioavailability, and overall impact on ecosystems. Climate warming and permafrost thaw in high latitudes will primarily affect the soil liquid phase thereby modifying delivery of coll...

The research presents quantitative estimates of the decomposition rate of plant residues at the initial stages of the decay of four plant species (Eriophorum vaginatum, Carex rostrata, Sphagnum fuscum, Sphagnum angustifolium) in peat deposits of the oligotrophic bogs in the southern taiga subzone of Western Siberia. We also studied the change in th...

Carbon dioxide fluxes in treed bogs in the South Taiga Zone of Western Siberia are estimated by using field data and a mathematical model calibrated against observation data. Forecasts of carbon balance under climate change are made by using the mathematical model.

The decomposition rate of four species of peat-forming plants typical of bog phytocenoses in the southern taiga subzone of Western Siberia—Sphagnum fuscum, Chamaedaphne calyculata, Eriophorum vaginatum, and Sphagnum angustifolium—was determined in the 3-yr field experiment. The research was performed by the method of partially isolated samples on t...

In this work, we compare the chronologies of H2O and CO2, and total pressure in the vacuum-extracted annual ring disc gas samples of six Scots pine discs in a single region of tree growth; and analyze the results. It is shown that the discs have different annual CO2 distributions, the H2O data weakly correlate with precipitation, but the detected c...

Observed and simulated carbon dioxide fluxes in oligotrophic peatlands of West Siberia are discussed. Net ecosystem exchange, gross primary production and ecosystem respiration were measured at ridge-hollow complex at South Taiga zone (Bakchar bog – field sataion “Vasjuganie”) and Middle Taiga zone (Mukhrino bog - field station “Mukhrino”). The mod...

Biotic cycling in ecosystems consists of live organic matter production and dead organic matter destruction. The latter is accompanied by the emission of greenhouse gases into the atmosphere. In peatland landscapes, additional conditions are imposed due to the presence of a water table depth (WTD), under which the destruction is anaerobic with meth...

The decomposition of the prevalent peat-forming plants of oligotrophic bogs in the southern taiga subzone of Western Siberia is quantified in a model experiment. The decay rate (DecR) of Sphagnum fuscum, Chamaedaphne calyculata, Eriophorum vaginatum, and mixed sample (60% of Sph. fuscum and 40% of C. caltculata)is estimated as a C(CO2) emission fro...

The research is devoted to the comparative analysis of the dynamics of the surface wetness of mires located within the southern taiga subzone of Western Siberia. Synchronous changes in the surface wetness of different mires in the same area during their development in the Holocene are most likely due to the influence of hydroclimatic fluctuations o...

The research presents quantitative estimates of the decomposition rate of plant residues at the initial stages of the decay of two plant species (Eriophorum vaginatum and Sphagnum fuscum) in a peat deposit of the oligotrophic bog in the southern taiga subzone of Western Siberia. We also studied a change in the content of total carbon and nitrogen i...

Testate amoebae assemblages were investigated in the peat deposits of the floodplain terrace swamp located in the southern taiga subzone of Western Siberia. It was revealed that tests of amoebae were well preserved in the minerotrophic peat. Variations in the structure of assemblages show that these bioindicators are sensitive to changes in the env...

________________Sharedit link: https://rdcu.be/blBZL _________________________________ The normalized difference vegetation index (NDVI) is used to estimate the aboveground net production (ANP) of wetland ecosystems for the key area at the South Taiga zone of West Siberia. The vegetation index and aboveground production are related by linear depend...

Quantitative estimates of the rate of transformation of moss residues of two species (Sphagnum angustifolium and Sphagnum fuscum) in the peat soils (Histosols) were obtained for two oligotrophic bogs with different hydrological conditions in the southern taiga of Western Siberia. The coefficients of decomposition rate (k) significantly differed for...

Normalized Difference Vegetation Index (NDVI) was used for estimation of wetland ecosystems aboveground net production (ANP) for key area at South Taiga zone of West Siberia. Vegetation index and aboveground production are related by linear dependence and they are specific for each wetland ecosystem. NDVI increases with ANP rise at wooded oligotrop...

The remains of subfossil oribatid mites have been investigated in nine peat layers of the eutrophic mire, located in the southern taiga ecological zone of Western Siberia. In total, 17 taxa have been revealed. Hydrophilic mites Limnozetes sp. and Hydrozetes sp. dominated all assemblages, which reflects an increased surface wetness of the mire durin...

Composition, biomass, and productivity of tree story of oligotrophic bogs in boreal domain in West Siberia were studied. Study sites Bakcharsky and Timiryazevsky were located in the eastern part of Ob-Irtysh interfluve, on the eastern margin of Vasyugan swamp (Tomsk Oblast, Bakcharsky district) and in Ob- Tomsk interfluve (Tomsk Oblast, Tomsk distr...

Presented are the results derived from monitoring the peat soil temperature in the bog located in the zone of the southern taiga of Western Siberia. The temperature regimes of peat soil on the bog and mineral soil in a dry area were compared to show their difference. The peat soil exhibited a smoothed temperature dynamics in contrast to the mineral...

The influence of various ecological factors (air and soil temperature, atmospheric pressure, level of peatland waters, and the content of CO2 in the atmosphere) on the emission of CO2 from the surface of a peat deposit of an oligotrophic peatland in the south taiga subzone of West Siberia was studied. On the basis of the investigations, day and sea...

Analysis of vegetation cover and tendencies in forest cover changes at a typical site in the south of West Siberia was performed using remote sensing observations from Landsat. The Northern Eurasia Land Cover legend was used for the assessment of unsupervised classification results. The land cover maps constructed have shown that about half of the...

The results of research of diurnal and seasonal dynamics of CO2 emission from the oligotrophic swamp surface in the southern taiga subzone of Western Siberia in 2005–2007 are under consideration. During the summertime, the intensity of CO2 emission increases from spring to the midsummer and then decreases by the fall. A mean CO2 emission value was...

Understanding human impact on changes in vegetation composition and structure can be performed using analysis of space images obtained from high resolution satellite sensors. Natural ecosystems at the South and Sob-Taiga zone of Western Siberia are characterized by development of an early succession stages, given the projected increase in disturban...

Приводятся данные многолетних (1999-2006 гг.) измерений запасов биомассы, динамики прироста фитомассы и мортмассы, чистой первичной продукции (NPP) болотных биогеоценозов олиготрофного и эвтрофного типа, расположенных на территории южно-таежной подзоны Западной Сибири (Томская область). Выявлено, что запасы фитомассы и NPP эвтрофного болота почти в...

В работе представлены результаты исследования суточной и сезонной динамики эмиссии СО2 с поверхности олиготрофного болота в южно-таежной подзоне Западной Сибири в 2005-2007 гг. В течение летнего периода происходит увеличение интенсивности эмиссии СО2 от весны к середине лета и последующее снижение к осени. Среднее значение эмиссии СО2 составило 118...

Understanding human impact on vegetation composition and structure, at scales from the patch to the globe, and capacity to monitor change over time is fundamental research problem to address Global Change and ensure sustainable development. Natural ecosystems at the South and Sob-Taiga zone of Western Siberia are characterized by development of an...

Role of peatlands in the global greenhouse gases budget is highly relevant. According to present estimates peatlands in undisturbed conditions act as a sink for the atmospheric carbon. Anthropogenic impact on peatlands (melioration, changes in land use, influence of underground water catchments) results in water table lowering, changing in vegetati...

The results of study of diurnal and seasonal carbon dioxide emission from oligotrophic peatland in southern taiga in Western Siberia are presented. CO2 emission was measured by infrared gas analyzer in 2005-2007 using closed static chamber technique during summer periods in 24 hours regime each 3 hours. The measurement site is a typical raised bog...

Приводятся результаты непрерывного мониторинга температуры метрового слоя торфяной почвы в течение 812 дней (с 28 июня 2005 г. по 26 сентября 2007 г.) с шагом измерений 1 час в зимнее и 15 мин в летнее время. Показано, что температурный режим торфяных почв как в течение года, так и в течение суток во многом определяется гидрологическими и погодными...

We report the results of continuous temperature monitoring (812 days, from 28 June 2005 to 26 September 2007) in a 80 cm layer of peat soil in Bakchar bog (West Siberia), at sampling rates of 60 min in wintertime and 15 min in summertime. Both annual and daily temperature patterns are controlled by water table position and weather conditions. Winte...

Total mercury content in peat soils of different botanical composition has been determined. Mercury content in peat depends on principal properties of peat soil such as botanical composition, ash content, degree of peat decomposition, as well as nitrogen, carbon, and humic acid content in peat. A model based on the mercury/biomass concept is propos...

The results of long-term (1999-2007) investigations of Phytomass (above and below-ground living biomass), dynamics of phytomass and mortmass and net primary productivity of oligotrophic and eutrophic mire in southern taiga in Western Siberia (Tomskaya oblast) are presented. The storages of phytomass on different biogeocenoses of oligotrophic bog ha...

In this paper we compare the accumulating capacities of various ecological indicators of mercury pollution in marsh and urban ecosystems and report experimental data on concentration of mercury in atmospheric air, urban soils, peat, lichens, mosses, mushrooms, and berries.

В ходе эколого-химических исследований содержания ртути в объектах окружающей среды прове- дены сравнительные оценки аккумулирующих свойств различных природных индикаторов на примере болотной и городской экосистем. Приведены экспериментальные данные по содержанию ртути в город- ских почвах, торфе, лишайниках, мхах, древесине и хвое.

The results of a long-term (1999–2007) investigation of vegetation productivity and carbon dioxide (CO2) emission from the surface of an oligotrophic mire in southern taiga in Western Siberia are presented. The studied ecosystems include pine—shrub—sphagnum (PSS) community, a similar community with oppressed (low) tree stand (LPSS), and sedge—sphag...

The major gases contributing to the greenhouse effect are carbon dioxide and methane (60 and 15–18%, respectively). The former Soviet Union area accounts for 11% of the global methane flux on the average. However, virtually no records of methane flux were kept in Russia in the late 1980s-early 1990s. Inventories of methane emission in Russia were r...

The major gases contributing to the greenhouse effect are carbon dioxide and methane (60 and 15–18%, respectively). The former Soviet Union area accounts for 11% of the global methane flux on the average. However, virtually no records of methane flux were kept in Russia in the late 1980s-early 1990s. Inventories of methane emission in Russia were r...

Elements of carbon balance of oligotrophic bogs were studied using an example of the landscape profile of the Klyuch River in 1998–2000. Carbon balance was preliminarily calculated taking into account the biological productivity, release of carbon dioxide and methane, and carbon outflow with bog waters. Based on the data obtained on the carbon infl...

The problem of CO2 balance is a basic in the biosphere study and in the prediction of consequences of the global climate change due to anthropogenous impacts. The growing mires are the unique ecosystems among the terrestrial biosystems capable to fix the atmospheric CO2 for a long period. The CO2 emission from peatlands into the atmosphere is cause...