/ M. I. Bird, Y. N. Kalaschnikov // Tellus. Series B: Chemical and physical meteorology. - 2002. - Vol. 54B, № 5. - С. 631-641
Аннотация: We present soil organic carbon (SOC) inventories and carbon isotope compositions from over 900 samples collected in areas of minimally disturbed mature vegetation on freely drained soils (excluding peatlands) on a 1000 km transect along the Yennisey River, central Siberia. Carbon inventories over 0-30 cm depth range widely from 1.71 to 7.05 kg m(-2). While an effect of changing climate or vegetation along the transect cannot be ruled out, the observed differences in SOC inventories are largely the result of variations in mineral soil texture, with inventories in fine-textured soils being approximately double those in coarse-textured soils. The delta(13)C values of SOC in the 0-5 cm interval ranged from -26.3 to -28.0parts per thousand, with delta(13)C values for the 5-30 cm interval being 0.9 +/- 0.8parts per thousand (1sigma) enriched in C-13 relative to the 0-5 cm samples. The average delta(13)C value for the 0-5 cm interval for all samples was -27.1 +/- 0.6parts per thousand (1sigma) and for the full 0-30 cm interval the average was -26.5 +/- 0.5parts per thousand (1sigma). In general, delta(13)C values were higher in coarse-textured soils and lower in fine-textured soils. The results of detailed sampling of soils in Pinus sylvestris forest growing on sand near the Zotino flux tower suggest an SOC inventory in these soils of 2.22 +/- 0.35 kg m(-2) over 30 cm and an average delta(13)C value of -26.3 +/- 0.2parts per thousand over the 0-5 cm depth interval and -25.9 +/- 0.3parts per thousand over 0-30 cm. Recent burning had no effect on SOC inventories, but clearing has led to an average 25% decrease on SOC inventories from 0-30 cm over 12 yr. Neither burning nor clearing had a discernible effect on the delta(13)C value of SOC.
WOS,
Scopus
Держатели документа:
VN Sukachev Inst Forests, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Bird, M.I.; Бёрд М.И.; Kalaschnikov, Y.N.; Калашников, Евгений Никифорович
Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН
w10=
Найдено документов в текущей БД: 93
Particulate emissions from fires in central Siberian Scots pine forests
: материалы временных коллективов / Yu. N. Samsonov [и др.] // Canadian Journal of Forest Research. - 2005. - Vol. 35, № : 9. - С. 2207-2217
Аннотация: Siberian boreal forest fires burn large areas annually, resulting in smoke that release large amounts of particulate emission into the atmospere. We sampled aerosol emissions from experimental fires of three Scots pine (Pinus sylvestris L.) forest sites of central Siberia. Emissions from ground-based aerosol samples were 0.1-0.7 t/ha. This value represented 1%- 7% of the total biomass (10-30 t/ha) consumed during the experimental fires. We were able classify the chemical composition of 77%-90% of the mass of particulate the emissions. Chemical analysis indicated that an average of 8%-17% of the particulate composition was of mineral emission.
Scopus,
WOS
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Samsonov, Yu.N.; Самсонов Ю.Н.; Koutsenogiy, K.P.; Куценогий К.П.; Makarov, V.I.; Макаров В.И.; Ivanov, A.V.; Иванов А.В.; Ivanov, Valery Alexandrovich; Иванов, Валерий Александрович; Ivanova, Galina Alexandrovna; Иванова, Галина Александровна
Аннотация: Siberian boreal forest fires burn large areas annually, resulting in smoke that release large amounts of particulate emission into the atmospere. We sampled aerosol emissions from experimental fires of three Scots pine (Pinus sylvestris L.) forest sites of central Siberia. Emissions from ground-based aerosol samples were 0.1-0.7 t/ha. This value represented 1%- 7% of the total biomass (10-30 t/ha) consumed during the experimental fires. We were able classify the chemical composition of 77%-90% of the mass of particulate the emissions. Chemical analysis indicated that an average of 8%-17% of the particulate composition was of mineral emission.
Scopus,
WOS
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Samsonov, Yu.N.; Самсонов Ю.Н.; Koutsenogiy, K.P.; Куценогий К.П.; Makarov, V.I.; Макаров В.И.; Ivanov, A.V.; Иванов А.В.; Ivanov, Valery Alexandrovich; Иванов, Валерий Александрович; Ivanova, Galina Alexandrovna; Иванова, Галина Александровна
The response of the soil CO2 emissions of a deciduou mixed stands in Hokkaido (Japan) to doubling of atmospheric carbon dioxide concentration
: материалы временных коллективов / O. V. Masyagina, S. G. Prokushkin, T. Koike // Лесные экосистемы Северо-Восточной Азии и их динамика: Материалы международной конференции. - Владивосток : Дальнаука, 2006. - С. 64-67. - Библиогр. в конце ст.
Аннотация: We examined effect of soil temperature and mineral soil water content on soil respiration regarding to CO2 conditions and soil type. Only a few correlations between soil respiration and ecological factors had been found. Thus, there was one negative significant correlation between soil respiratiion and Tsoil of volcanic soil at elevated CO2 in July (r2=-0.67, p=0.002, N=18). We found negative correlations between Rsoil and MSWC in volcanic soil at elevated CO2 in July (r2=-0.57, p=0.015, N=18), in brown forest soil at elevaedt CO2 in August (r2=-0.53, p=0.023, N=18), and in brown forest soil at ambient CO2 in October (r2=-0.59, p=0.010, N=18). We did not find any effect of soil type on soil respiration during vegetative period.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Prokushkin, Staniclav Grigor'evich; Прокушкин Станислав Григорьевич; Koike, T.; Койке Т.; Масягина, Оксана Викторовна
Имеются экземпляры в отделах:
РСФ (25.10.2006г. (1 экз.) - Б.ц.) - свободны 1
Аннотация: We examined effect of soil temperature and mineral soil water content on soil respiration regarding to CO2 conditions and soil type. Only a few correlations between soil respiration and ecological factors had been found. Thus, there was one negative significant correlation between soil respiratiion and Tsoil of volcanic soil at elevated CO2 in July (r2=-0.67, p=0.002, N=18). We found negative correlations between Rsoil and MSWC in volcanic soil at elevated CO2 in July (r2=-0.57, p=0.015, N=18), in brown forest soil at elevaedt CO2 in August (r2=-0.53, p=0.023, N=18), and in brown forest soil at ambient CO2 in October (r2=-0.59, p=0.010, N=18). We did not find any effect of soil type on soil respiration during vegetative period.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Prokushkin, Staniclav Grigor'evich; Прокушкин Станислав Григорьевич; Koike, T.; Койке Т.; Масягина, Оксана Викторовна
Имеются экземпляры в отделах:
РСФ (25.10.2006г. (1 экз.) - Б.ц.) - свободны 1
502
S 98
S 98
Soil nitrogen dynamics in a larch forest, Central Siberia : A short review of preliminary results
: материалы временных коллективов / S. Hobara [и др.] // Symptom of environmental change in Siberian permafrost region: proceedings of the International symposium of JSPS core to core program between Hokkaido university and Martin Luther university Halle-Wittenberg in 29-30 November 2005, Sapporo, Japan. - Sapporo : Hokkaido University Press, 2006. - С. 109-111. - Библиогр. в конце ст.
Аннотация: Surface soils (organic layer and 0-10 cm mineral soil) from larch forests, Central Siberia, had small pool size of soil inorganic N, while higher values can be observed especially in organic layer in N fertilized sites. Annual leachate of inorganic N was also small before N fertilization, while greater values were observed beneath organic layer in high N site after fertilization. Thus, N treatment seems to stimulate inorganic N dynamics of soil surface, and it may consequently lead to stimulation of lower soils. Dissolved organic nitrogen (DON) was the most important N form constantly supplying dissolved N to soil circumstances in this site, suggesting a possibility of organic N to control on ecosystem processes in these forests.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Hobara, S.; Хобара С.; Tokuchi, N.; Токучи Н.; Kondo, K.; Кондо К.; Prokushkin, Anatoly Stanislavovich; Прокушкин, Анатолий Станиславович; Abaimov, Anatoly Platonovich; Абаимов Анатолий Платонович
Имеются экземпляры в отделах:
РСФ (05.12.2006г. (1 экз.) - Б.ц.) - свободны 1
| УДК |
Аннотация: Surface soils (organic layer and 0-10 cm mineral soil) from larch forests, Central Siberia, had small pool size of soil inorganic N, while higher values can be observed especially in organic layer in N fertilized sites. Annual leachate of inorganic N was also small before N fertilization, while greater values were observed beneath organic layer in high N site after fertilization. Thus, N treatment seems to stimulate inorganic N dynamics of soil surface, and it may consequently lead to stimulation of lower soils. Dissolved organic nitrogen (DON) was the most important N form constantly supplying dissolved N to soil circumstances in this site, suggesting a possibility of organic N to control on ecosystem processes in these forests.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Hobara, S.; Хобара С.; Tokuchi, N.; Токучи Н.; Kondo, K.; Кондо К.; Prokushkin, Anatoly Stanislavovich; Прокушкин, Анатолий Станиславович; Abaimov, Anatoly Platonovich; Абаимов Анатолий Платонович
Имеются экземпляры в отделах:
РСФ (05.12.2006г. (1 экз.) - Б.ц.) - свободны 1
РСФ
V34
V34
Biochemistry of carbon and nitrogen in the Siberian Afforestation Experiment
: материалы временных коллективов / E. F. Vedrova // Tree species effects on soils: implications for global change. - 2005. - С. 281-292. - Библиогр. в конце ст.
Аннотация: We evaluated parameters (stock and flux) carbon, nitrogen and ash element cycling in the plant-soil system. The study was performed in arolla pine, Scots pine, Siberian larch, Norway spruce, aspen and birch plantations established on Kemchug upland, Chulym-Yenisei denudational plain, in 1968-1972. Young ecosystems (age class 2) that have developed under relatively similar environmental conditions have thus accumulated different amounts of organic and mineral matter in biomass and detritus, mainly due to differences in major woody species characteristics. All ecosystems are a net atmosperic carbon sink, with a pooling rate of 1.81-4.43 t C ha -1 yr -1. The sink (NEP) is made up by C accumulation in stand biomass production, vegetation detritus, and soil humus and accounts for 46-76% of the total C allocated in annual increment; the main componentt is net C flux to biomass. The rate of N-min flux from soil pool to NPP is in fact in balance with that soil N-min accumulation in the arolla pine, larch, spruce, and birch plots. In addition, the ecosystems are characterized by a transitional cycling regime evident through non-balanced controlling organic and mineral matter stored in "plant-soil" system blocks.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Ведрова, Эстелла Федоровна
Имеются экземпляры в отделах:
РСФ (14.03.2007г. (1 экз.) - Б.ц.) - свободны 1
Аннотация: We evaluated parameters (stock and flux) carbon, nitrogen and ash element cycling in the plant-soil system. The study was performed in arolla pine, Scots pine, Siberian larch, Norway spruce, aspen and birch plantations established on Kemchug upland, Chulym-Yenisei denudational plain, in 1968-1972. Young ecosystems (age class 2) that have developed under relatively similar environmental conditions have thus accumulated different amounts of organic and mineral matter in biomass and detritus, mainly due to differences in major woody species characteristics. All ecosystems are a net atmosperic carbon sink, with a pooling rate of 1.81-4.43 t C ha -1 yr -1. The sink (NEP) is made up by C accumulation in stand biomass production, vegetation detritus, and soil humus and accounts for 46-76% of the total C allocated in annual increment; the main componentt is net C flux to biomass. The rate of N-min flux from soil pool to NPP is in fact in balance with that soil N-min accumulation in the arolla pine, larch, spruce, and birch plots. In addition, the ecosystems are characterized by a transitional cycling regime evident through non-balanced controlling organic and mineral matter stored in "plant-soil" system blocks.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Ведрова, Эстелла Федоровна
Имеются экземпляры в отделах:
РСФ (14.03.2007г. (1 экз.) - Б.ц.) - свободны 1
Isoenzyme diversity and differentiation of Marsh Scotch pine (Pinus sylvestris L.) population in the Western Siberia
: материалы временных коллективов / A. Ya. Larionova, A. K. Ekart // Eurasian Journal of Forest Research. - 2011. - Vol.14-1. - С. 21-28. - Библиогр. в конце ст.
Аннотация: Genetic diversity and defferentiation of Scotch pine populations situated on eutrophic, mesetrophic, oligotrophic swamps and on dry land in south-taiga subzone of Western Siberia lowland (Tomsk region) were srudied on the basis of allozyme variation analysis at 20 loci. The most essential distinctions in genetic structure were revealed between populations of Scotch pine growing under contrast conditions of water-mineral nutrition on eutrophic and oligotrophic swamps as well as between populations situated on the various oligotrophic swamps. The obtained results testify to considerable genetic heterogeneity studied in Tomsk region of marsh populations of Scotch pine.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Ekart, Alexandr Karlovich; Экарт Александр Карлович; Ларионова, Альбина Яковлевна
Аннотация: Genetic diversity and defferentiation of Scotch pine populations situated on eutrophic, mesetrophic, oligotrophic swamps and on dry land in south-taiga subzone of Western Siberia lowland (Tomsk region) were srudied on the basis of allozyme variation analysis at 20 loci. The most essential distinctions in genetic structure were revealed between populations of Scotch pine growing under contrast conditions of water-mineral nutrition on eutrophic and oligotrophic swamps as well as between populations situated on the various oligotrophic swamps. The obtained results testify to considerable genetic heterogeneity studied in Tomsk region of marsh populations of Scotch pine.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Ekart, Alexandr Karlovich; Экарт Александр Карлович; Ларионова, Альбина Яковлевна
Особенности послепожарного восстановления микробных сообществ криогенных почв в лиственничниках Центральной Эвенкии
[Текст] = Post-fire recovering features of microbial communities of cryogenic soils of Central Evenkia larch stands : материалы временных коллективов / Е. А. Ворожцова // Исследование компонентов лесных экосистем Сибири: Материалы конференции молодых ученых, 5-6 апреля 2012 г. , Красноярск. - Красноярск : Институт леса им. В.Н. Сукачева СО РАН , 2012. - Вып.13. - С. 6-8. - Библиогр.: с. 7-8
Аннотация: The microbial community's structure in cryogenic soils of post-fired areas of Central Evenkia was examined. It was shown that microbial biomass and heterotrophic respiration rates in cryogenic soils of post-firee areas recovered for mineral layer of lichen and moss synusia after 14 and 18 yaers accordingly. Microbial biomass and heterotrophic respiration rates in the litter of post-fire areas remain disturbed. The eco-physiological status of microbial communities in cryogenic soils of post-fired areas in litter and mineral layer of moss synusia recovered after 18 years. On the contrary eco-physiological status of microbial communities in mineral layer of lichen synusia remain disturbed. The investigated time period is not enough for recovering of microbial communities structure.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50/28
Доп.точки доступа:
Vorozhtsova E.A.
Аннотация: The microbial community's structure in cryogenic soils of post-fired areas of Central Evenkia was examined. It was shown that microbial biomass and heterotrophic respiration rates in cryogenic soils of post-firee areas recovered for mineral layer of lichen and moss synusia after 14 and 18 yaers accordingly. Microbial biomass and heterotrophic respiration rates in the litter of post-fire areas remain disturbed. The eco-physiological status of microbial communities in cryogenic soils of post-fired areas in litter and mineral layer of moss synusia recovered after 18 years. On the contrary eco-physiological status of microbial communities in mineral layer of lichen synusia remain disturbed. The investigated time period is not enough for recovering of microbial communities structure.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50/28
Доп.точки доступа:
Vorozhtsova E.A.
Biogeochemistry of stable Ca and radiogenic Sr isotopes in a larch-covered permafrost-dominated watershed of Central Siberia
/ M. L. Bagard [et al.] // Geochim. Cosmochim. Acta. - 2013. - Vol. 114. - P169-187, DOI 10.1016/j.gca.2013.03.038. - Cited References: 104. - We thank T. Bullen and two anonymous reviewers for their thorough and constructive reviews and A. Jacobson for editorial handling. S. Gangloff is thanked for her assistance with Ca isotope chemistry and T. Perrone for his help in measuring Sr isotopes. This work was supported by the French INSU-CNRS program "EC2CO-Cytrix", and CNRS program "GDRI CAR-WET-SIB, ANR "Arctic Metals", programs of presidium UroRAS and RAS. It was also supported by the funding from the Region Alsace, France, and the CPER 2003-2013 "REALISE". MLB benefited the funding of a Ph.D. scholarship from the French Ministry of National Education and Research. This is an EOST-LHyGeS contribution.
. - 19. - ISSN 0016-7037
РУБ Geochemistry & Geophysics
Аннотация: Stable Ca and radiogenic Sr isotope compositions were measured in different compartments (stream water, soil solutions, rocks, soils and soil leachates and vegetation) of a small permafrost-dominated watershed in the Central Siberian Plateau. The Sr and Ca in the area are supplied by basalt weathering and atmospheric depositions, which significantly impact the Sr isotopic compositions. Only vegetation significantly fractionates the calcium isotopes within the watershed. These fractionations occur during Ca uptake by roots and along the transpiration stream within the larch trees and are hypothesised to be the result of chromatographic processes and Ca oxalate crystallisations during Ca circulation or storage within plant organs. Biomass degradation significantly influences the Ca isotopic compositions of soil solutions and soil leachates via the release of light Ca, and organic and organo-mineral colloids are thought to affect the Ca isotopic compositions of soil solutions by preferential scavenging of Ca-40. The imprint of organic matter degradation on the delta Ca-44/40 of soil solutions is much more significant for the warmer south-facing slope of the watershed than for the shallow and cold soil active layer of the north-facing slope. As a result, the available stock of biomass and the decomposition rates appear to be critical parameters that regulate the impact of vegetation on the soil-water system in permafrost areas. Finally, the obtained delta Ca-44/40 patterns contrast with those described for permafrost-free environments with a much lower delta Ca-44/40 fractionation factor between soils and plants, suggesting specific features of organic matter decomposition in permafrost environments. The biologically induced Ca isotopic fractionation observed at the soil profile scale is not pronounced at the scale of the streams and large rivers in which the delta Ca-44/40 signature may be controlled by the heterogeneity of lithological sources. (C) 2013 Elsevier Ltd. All rights reserved.
Полный текст,
WOS,
Scopus
Держатели документа:
[Bagard, Marie-Laure
Schmitt, Anne-Desiree
Chabaux, Francois
Stille, Peter] Univ Strasbourg, F-67084 Strasbourg, France
[Bagard, Marie-Laure
Schmitt, Anne-Desiree
Chabaux, Francois
Stille, Peter] CNRS, EOST, LHyGeS, F-67084 Strasbourg, France
[Schmitt, Anne-Desiree] Univ Franche Comte, CNRS, UMR 6249, F-25030 Besancon, France
[Pokrovsky, Oleg S.
Viers, Jerome] Univ Toulouse 3, CNRS, UMR 5563, Geosci & Environm Toulouse, F-31400 Toulouse, France
[Pokrovsky, Oleg S.] Russian Acad Sci, Inst Ecol Problems North, Arkhangelsk, Russia
[Labolle, Francois] Univ Strasbourg, Inst Zool & Biol Gen, F-67000 Strasbourg, France
[Prokushkin, Anatoly S.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk, Russia
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Bagard, M.L.; Schmitt, A.D.; Chabaux, F...; Pokrovsky, O.S.; Viers, J...; Stille, P...; Labolle, F...; Prokushkin, A.S.
Рубрики:
DISSOLVED ORGANIC-CARBON
CALCIUM-OXALATE CRYSTALS
ASIAN DUST
STRONTIUM ISOTOPES
CHANGING SOURCES
ORTHO-PYROXENE
BOREAL RIVER
FRACTIONATION
SOILS
VEGETATION
DISSOLVED ORGANIC-CARBON
CALCIUM-OXALATE CRYSTALS
ASIAN DUST
STRONTIUM ISOTOPES
CHANGING SOURCES
ORTHO-PYROXENE
BOREAL RIVER
FRACTIONATION
SOILS
VEGETATION
Аннотация: Stable Ca and radiogenic Sr isotope compositions were measured in different compartments (stream water, soil solutions, rocks, soils and soil leachates and vegetation) of a small permafrost-dominated watershed in the Central Siberian Plateau. The Sr and Ca in the area are supplied by basalt weathering and atmospheric depositions, which significantly impact the Sr isotopic compositions. Only vegetation significantly fractionates the calcium isotopes within the watershed. These fractionations occur during Ca uptake by roots and along the transpiration stream within the larch trees and are hypothesised to be the result of chromatographic processes and Ca oxalate crystallisations during Ca circulation or storage within plant organs. Biomass degradation significantly influences the Ca isotopic compositions of soil solutions and soil leachates via the release of light Ca, and organic and organo-mineral colloids are thought to affect the Ca isotopic compositions of soil solutions by preferential scavenging of Ca-40. The imprint of organic matter degradation on the delta Ca-44/40 of soil solutions is much more significant for the warmer south-facing slope of the watershed than for the shallow and cold soil active layer of the north-facing slope. As a result, the available stock of biomass and the decomposition rates appear to be critical parameters that regulate the impact of vegetation on the soil-water system in permafrost areas. Finally, the obtained delta Ca-44/40 patterns contrast with those described for permafrost-free environments with a much lower delta Ca-44/40 fractionation factor between soils and plants, suggesting specific features of organic matter decomposition in permafrost environments. The biologically induced Ca isotopic fractionation observed at the soil profile scale is not pronounced at the scale of the streams and large rivers in which the delta Ca-44/40 signature may be controlled by the heterogeneity of lithological sources. (C) 2013 Elsevier Ltd. All rights reserved.
Полный текст,
WOS,
Scopus
Держатели документа:
[Bagard, Marie-Laure
Schmitt, Anne-Desiree
Chabaux, Francois
Stille, Peter] Univ Strasbourg, F-67084 Strasbourg, France
[Bagard, Marie-Laure
Schmitt, Anne-Desiree
Chabaux, Francois
Stille, Peter] CNRS, EOST, LHyGeS, F-67084 Strasbourg, France
[Schmitt, Anne-Desiree] Univ Franche Comte, CNRS, UMR 6249, F-25030 Besancon, France
[Pokrovsky, Oleg S.
Viers, Jerome] Univ Toulouse 3, CNRS, UMR 5563, Geosci & Environm Toulouse, F-31400 Toulouse, France
[Pokrovsky, Oleg S.] Russian Acad Sci, Inst Ecol Problems North, Arkhangelsk, Russia
[Labolle, Francois] Univ Strasbourg, Inst Zool & Biol Gen, F-67000 Strasbourg, France
[Prokushkin, Anatoly S.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk, Russia
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Bagard, M.L.; Schmitt, A.D.; Chabaux, F...; Pokrovsky, O.S.; Viers, J...; Stille, P...; Labolle, F...; Prokushkin, A.S.
Geostatistical analysis of the spatial variation of the ash reserves in the litter of bog birch forests in Western Siberia
/ T. T. Efremova [et al.] // Eurasian Soil Sci. - 2013. - Vol. 46, Is. 1. - P51-60, DOI 10.1134/S1064229312120034. - Cited References: 29. - This work was supported by Program no. 26 of the Presidium of the Russian Academy of Sciences Biological Diversity and Project no. 2 of the Siberian Division of the Russian Academy of Sciences.
. - 10. - ISSN 1064-2293
РУБ Soil Science
Аннотация: A typological series of native Betula pubescens Ehrh. dendrocenoses along the channel of a river crossing a bog was studied. The variability of the mineral element reserves is described by geostatistical methods as the sum of a trend, autocorrelation, and random components. The contribution of deterministic and random components has been assessed in the years with average precipitation and in the year of 2007 with high and long-term flooding. The empirical variograms and the parameters of the model variograms are presented. The class of the spatial correlation of the ash reserves is described. A primary cause of the ash content's variability is the specific water regime, which is determined by the following: (i) the abundance and duration of the spring floods responsible for the silt mass brought by the river and (ii) the draining effect of the intrabog river, the distance from which provided the formation in the forest of the ground cover with the specific species composition and ash content. The falloff of the arboreal layer in the bog birch forests formed the fundamental mineral background of the litter.
Полный текст,
WOS,
Scopus
Держатели документа:
[Efremova, T. T.
Sekretenko, O. P.
Avrova, A. F.
Efremov, S. P.] Russian Acad Sci, Sukachev Inst Forest, Siberian Div, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Efremova, T.T.; Sekretenko, O.P.; Avrova, A.F.; Efremov, S.P.
Рубрики:
SOIL PROPERTIES
VARIABILITY
Кл.слова (ненормированные):
variograms -- typological series -- water regime -- litter
SOIL PROPERTIES
VARIABILITY
Кл.слова (ненормированные):
variograms -- typological series -- water regime -- litter
Аннотация: A typological series of native Betula pubescens Ehrh. dendrocenoses along the channel of a river crossing a bog was studied. The variability of the mineral element reserves is described by geostatistical methods as the sum of a trend, autocorrelation, and random components. The contribution of deterministic and random components has been assessed in the years with average precipitation and in the year of 2007 with high and long-term flooding. The empirical variograms and the parameters of the model variograms are presented. The class of the spatial correlation of the ash reserves is described. A primary cause of the ash content's variability is the specific water regime, which is determined by the following: (i) the abundance and duration of the spring floods responsible for the silt mass brought by the river and (ii) the draining effect of the intrabog river, the distance from which provided the formation in the forest of the ground cover with the specific species composition and ash content. The falloff of the arboreal layer in the bog birch forests formed the fundamental mineral background of the litter.
Полный текст,
WOS,
Scopus
Держатели документа:
[Efremova, T. T.
Sekretenko, O. P.
Avrova, A. F.
Efremov, S. P.] Russian Acad Sci, Sukachev Inst Forest, Siberian Div, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Efremova, T.T.; Sekretenko, O.P.; Avrova, A.F.; Efremov, S.P.
Biogeochemistry of carbon, major and trace elements in watersheds of northern Eurasia drained to the Arctic Ocean: The change of fluxes, sources and mechanisms under the climate warming prospective
/ O. S. Pokrovsky [et al.] // C. R. Geosci. - 2012. - Vol. 344, Is. 11.12.2013. - P663-677, DOI 10.1016/j.crte.2012.08.003. - Cited References: 81. - This work was supported by ANR "Arctic Metals", LIA "LEAGE", PICS No. 6063, GDRI "CAR WET SIB", grants RFBR-CNRS Nos 12-05-91055, 08-05-00312_a, 07-05-92212-CNRS_a, 08-04-92495-CNRS_a, CRDF RUG1-2980-KR10, Federal Program RF "Kadry" (contract N 14.740.11.0935), and Programs of Presidium RAS and UrORAS.
. - 15. - ISSN 1631-0713
РУБ Geosciences, Multidisciplinary
Аннотация: Warming of the permafrost accompanied by the release of ancient soil organic carbon is one of the most significant environmental threats within the global climate change scenario. While the main sites of permafrost carbon processing and its release to the atmosphere are thermokarst (thaw) lakes and ponds, the main carriers of carbon and related major and trace elements from the land to the Arctic ocean are Russian subarctic rivers. The source of carbon in these rivers is atmospheric C consumed by chemical weathering of rocks and amplified by plant uptake and litter decomposition. This multidisciplinary study describes results of more than a decade of observations and measurements of elements fluxes, stocks and mechanisms in the Russian boreal and subarctic zone, from Karelia region to the Kamchatka peninsula, along the gradient of permafrost-free terrain to continuous permafrost settings, developed on various lithology and vegetation types. We offer a comprehensive, geochemically-based view on the functioning of aquatic boreal systems which quantifies the role of the following factors on riverine element fluxes: (1) the specificity of lithological substrate; (2) the importance of organic and organo-mineral colloidal forms, notably during the snowmelt season; (3) the phenomenon of lakes seasonal overturn; (4) the role of permafrost within the small and large watersheds; and (5) the governing role of terrestrial vegetation in element mobilization from rock substrate to the river. Care of such a multiple approach, a first order prediction of the evolution of element stocks and fluxes under scenario of progressive warming in high latitudes becomes possible. It follows the increase of frozen peat thawing in western Siberia will increase the stocks of elements in surface waters by a factor of 3 to 10 whereas the increase of the thickness of active layer, the biomass and the primary productivity all over permafrost-affected zone will bring about a short-term increase of elements stocks in labile reservoir (plant litter) and riverine fluxes by a factor of 2. The change of the plant productivity and community composition under climate warming in central Siberia will be the most important factor of major and trace element fluxes increase (probably a factor of 2) from the soil to the river and, finally, to the Arctic Ocean. (c) 2012 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
Полный текст,
WOS,
Scopus
Держатели документа:
[Pokrovsky, Oleg S.
Viers, Jerome
Dupre, Bernard
Audry, Stephane] Univ Toulouse, CNRS IRD OMP, Geosci Environm Toulouse, F-31400 Toulouse, France
[Chabaux, Francois] CNRS, EOST, UMR 7517, CGS, F-67084 Strasbourg, France
[Gaillardet, Jerome] Inst Phys Globe Strasbourg Paris, Equipe Geochim Cosmochim, F-75005 Paris, France
[Prokushkin, Anatoly S.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk, Russia
[Shirokova, Liudmila S.] Russian Acad Sci, Inst Ecol Problems N, Arkhangelsk, Russia
[Kirpotin, Sergey N.] Tomsk State Univ, Tomsk 634050, Russia
[Lapitsky, Sergey A.] Moscow MV Lomonosov State Univ, Geol Fac, Moscow, Russia
[Shevchenko, Vladimir P.] RAS, PP Shirshov Oceanol Inst, Moscow 117901, Russia
Доп.точки доступа:
Pokrovsky, O.S.; Viers, J...; Dupre, B...; Chabaux, F...; Gaillardet, J...; Audry, S...; Prokushkin, A.S.; Shirokova, L.S.; Kirpotin, S.N.; Lapitsky, S.A.; Shevchenko, V.P.
Рубрики:
WOLLASTONITE DISSOLUTION KINETICS
SEVERNAYA DVINA RIVER
ORGANIC-LIGANDS
WESTERN SIBERIA
HETEROTROPHIC BACTERIA
FLUVIAL GEOCHEMISTRY
COLLOIDAL PARTICLES
SOUTHWEST ICELAND
SIZE DISTRIBUTION
WEATHERING RATES
Кл.слова (ненормированные):
Arctic -- Geochemistry -- Permafrost -- Carbon -- Weathering -- Fluxes
WOLLASTONITE DISSOLUTION KINETICS
SEVERNAYA DVINA RIVER
ORGANIC-LIGANDS
WESTERN SIBERIA
HETEROTROPHIC BACTERIA
FLUVIAL GEOCHEMISTRY
COLLOIDAL PARTICLES
SOUTHWEST ICELAND
SIZE DISTRIBUTION
WEATHERING RATES
Кл.слова (ненормированные):
Arctic -- Geochemistry -- Permafrost -- Carbon -- Weathering -- Fluxes
Аннотация: Warming of the permafrost accompanied by the release of ancient soil organic carbon is one of the most significant environmental threats within the global climate change scenario. While the main sites of permafrost carbon processing and its release to the atmosphere are thermokarst (thaw) lakes and ponds, the main carriers of carbon and related major and trace elements from the land to the Arctic ocean are Russian subarctic rivers. The source of carbon in these rivers is atmospheric C consumed by chemical weathering of rocks and amplified by plant uptake and litter decomposition. This multidisciplinary study describes results of more than a decade of observations and measurements of elements fluxes, stocks and mechanisms in the Russian boreal and subarctic zone, from Karelia region to the Kamchatka peninsula, along the gradient of permafrost-free terrain to continuous permafrost settings, developed on various lithology and vegetation types. We offer a comprehensive, geochemically-based view on the functioning of aquatic boreal systems which quantifies the role of the following factors on riverine element fluxes: (1) the specificity of lithological substrate; (2) the importance of organic and organo-mineral colloidal forms, notably during the snowmelt season; (3) the phenomenon of lakes seasonal overturn; (4) the role of permafrost within the small and large watersheds; and (5) the governing role of terrestrial vegetation in element mobilization from rock substrate to the river. Care of such a multiple approach, a first order prediction of the evolution of element stocks and fluxes under scenario of progressive warming in high latitudes becomes possible. It follows the increase of frozen peat thawing in western Siberia will increase the stocks of elements in surface waters by a factor of 3 to 10 whereas the increase of the thickness of active layer, the biomass and the primary productivity all over permafrost-affected zone will bring about a short-term increase of elements stocks in labile reservoir (plant litter) and riverine fluxes by a factor of 2. The change of the plant productivity and community composition under climate warming in central Siberia will be the most important factor of major and trace element fluxes increase (probably a factor of 2) from the soil to the river and, finally, to the Arctic Ocean. (c) 2012 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
Полный текст,
WOS,
Scopus
Держатели документа:
[Pokrovsky, Oleg S.
Viers, Jerome
Dupre, Bernard
Audry, Stephane] Univ Toulouse, CNRS IRD OMP, Geosci Environm Toulouse, F-31400 Toulouse, France
[Chabaux, Francois] CNRS, EOST, UMR 7517, CGS, F-67084 Strasbourg, France
[Gaillardet, Jerome] Inst Phys Globe Strasbourg Paris, Equipe Geochim Cosmochim, F-75005 Paris, France
[Prokushkin, Anatoly S.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk, Russia
[Shirokova, Liudmila S.] Russian Acad Sci, Inst Ecol Problems N, Arkhangelsk, Russia
[Kirpotin, Sergey N.] Tomsk State Univ, Tomsk 634050, Russia
[Lapitsky, Sergey A.] Moscow MV Lomonosov State Univ, Geol Fac, Moscow, Russia
[Shevchenko, Vladimir P.] RAS, PP Shirshov Oceanol Inst, Moscow 117901, Russia
Доп.точки доступа:
Pokrovsky, O.S.; Viers, J...; Dupre, B...; Chabaux, F...; Gaillardet, J...; Audry, S...; Prokushkin, A.S.; Shirokova, L.S.; Kirpotin, S.N.; Lapitsky, S.A.; Shevchenko, V.P.
Seasonal variability of element fluxes in two Central Siberian rivers draining high latitude permafrost dominated areas
[Text] / M. L. Bagard [et al.] // Geochim. Cosmochim. Acta. - 2011. - Vol. 75, Is. 12. - P3335-3357, DOI 10.1016/j.gca.2011.03.024. - Cited References: 80. - This work benefited from fruitful discussions with S. Derenne, J. Templier, and T. Weber and from thorough reviews by S. Gislason, Ed Tipper and an anonymous reviewer. We also thank the associate Editor S. Hemming. B. Kieffel, Th. Perronne and E. Pelt are acknowledged for their help in measuring U and Sr isotope ratios. This work was financially supported by the French INSU-CNRS program "EC2CO-Cytrix", and CNRS program "GDRI Car-Wet-Sib". It was also supported by the funding from the Region Alsace, France, and the CPER 2003-2013 "REALISE". MLB benefited the funding of a Ph.D. scholarship from the French Ministry of National Education and Research. This is an EOST-LHyGeS contribution.
. - 23. - ISSN 0016-7037
РУБ Geochemistry & Geophysics
Аннотация: In order to constrain the origin and fluxes of elements carried by rivers of high latitude permafrost-dominated areas, major and trace element concentrations as well as Sr and U isotopic ratios were analyzed in the dissolved load of two Siberian rivers (Kochechum and Nizhnyaya Tunguska) regularly sampled over two hydrological cycles (2005-2007). Large water volumes of both rivers were also collected in spring 2008 in order to perform size separation through dialysis experiments. This study was completed by spatial sampling of the Kochechum watershed carried out during summer and by a detailed analysis of the main hydrological compartments of a small watershed. From element concentration variations along the hydrological cycle, different periods can be marked out, matching hydrological periods. During winter baseflow period (October to May) there is a concentration increase for major soluble cations and anions by an order of magnitude. The spring flood period (end of May-beginning of June) is marked by a sharp concentration decrease for soluble elements whereas dissolved organic carbon and insoluble element concentrations strongly increase. When the spring flood discharge occurs, the significant increase of aluminum and iron concentrations is related to the presence of organo-mineral colloids that mobilize insoluble elements. The study of colloidal REE reveals the occurrence of two colloid sources successively involved over time: spring colloids mainly originate from the uppermost organic-rich part of soils whereas summer colloids rather come from the deep mineral horizons. Furthermore, U and Sr isotopic ratios together with soluble cation budgets in the Kochechum river impose for soluble elements the existence of three distinct fluxes over the year: (a) at the spring flood a surface flux coming from the leaching of shallow organic soil levels and containing a significant colloidal component (b) a subsurface flux predominant during summer and fall mainly controlled by water-rock interactions within mineral soils and (c) a deep groundwater flux predominant during winter which enters large rivers through unfrozen permafrost-paths. Detailed study of the Kochechum watershed suggests that the contribution of this deep flux strongly depends on the depth and continuous nature of the permafrost. (C) 2011 Elsevier Ltd. All rights reserved.
Полный текст,
WOS,
Scopus
Держатели документа:
[Bagard, Marie-Laure
Chabaux, Francois
Stille, Peter
Rihs, Sophie] Univ Strasbourg, F-67084 Strasbourg, France
[Bagard, Marie-Laure
Chabaux, Francois
Stille, Peter
Rihs, Sophie] CNRS, EOST, LHyGeS, F-67084 Strasbourg, France
[Pokrovsky, Oleg S.
Viers, Jerome
Dupre, Bernard] Observ Midi Pyrenees, UMR 5563, CNRS, LMTG, Paris, France
[Prokushkin, Anatoly S.] SB RAS, VN Sukachev Inst Forest, Krasnoyarsk, Russia
[Schmitt, Anne-Desiree] Univ Franche Comte, CNRS, UMR 6249, F-25030 Besancon, France
Доп.точки доступа:
Bagard, M.L.; Chabaux, F...; Pokrovsky, O.S.; Viers, J...; Prokushkin, A.S.; Stille, P...; Rihs, S...; Schmitt, A.D.; Dupre, B...
Рубрики:
RARE-EARTH-ELEMENTS
CHEMICAL-WEATHERING RATES
TH-SERIES NUCLIDES
TRACE-ELEMENTS
BOREAL RIVER
BALTIC SEA
FLUVIAL GEOCHEMISTRY
EASTERN SIBERIA
ISOTOPE FRACTIONATION
COLLOIDAL PARTICLES
RARE-EARTH-ELEMENTS
CHEMICAL-WEATHERING RATES
TH-SERIES NUCLIDES
TRACE-ELEMENTS
BOREAL RIVER
BALTIC SEA
FLUVIAL GEOCHEMISTRY
EASTERN SIBERIA
ISOTOPE FRACTIONATION
COLLOIDAL PARTICLES
Аннотация: In order to constrain the origin and fluxes of elements carried by rivers of high latitude permafrost-dominated areas, major and trace element concentrations as well as Sr and U isotopic ratios were analyzed in the dissolved load of two Siberian rivers (Kochechum and Nizhnyaya Tunguska) regularly sampled over two hydrological cycles (2005-2007). Large water volumes of both rivers were also collected in spring 2008 in order to perform size separation through dialysis experiments. This study was completed by spatial sampling of the Kochechum watershed carried out during summer and by a detailed analysis of the main hydrological compartments of a small watershed. From element concentration variations along the hydrological cycle, different periods can be marked out, matching hydrological periods. During winter baseflow period (October to May) there is a concentration increase for major soluble cations and anions by an order of magnitude. The spring flood period (end of May-beginning of June) is marked by a sharp concentration decrease for soluble elements whereas dissolved organic carbon and insoluble element concentrations strongly increase. When the spring flood discharge occurs, the significant increase of aluminum and iron concentrations is related to the presence of organo-mineral colloids that mobilize insoluble elements. The study of colloidal REE reveals the occurrence of two colloid sources successively involved over time: spring colloids mainly originate from the uppermost organic-rich part of soils whereas summer colloids rather come from the deep mineral horizons. Furthermore, U and Sr isotopic ratios together with soluble cation budgets in the Kochechum river impose for soluble elements the existence of three distinct fluxes over the year: (a) at the spring flood a surface flux coming from the leaching of shallow organic soil levels and containing a significant colloidal component (b) a subsurface flux predominant during summer and fall mainly controlled by water-rock interactions within mineral soils and (c) a deep groundwater flux predominant during winter which enters large rivers through unfrozen permafrost-paths. Detailed study of the Kochechum watershed suggests that the contribution of this deep flux strongly depends on the depth and continuous nature of the permafrost. (C) 2011 Elsevier Ltd. All rights reserved.
Полный текст,
WOS,
Scopus
Держатели документа:
[Bagard, Marie-Laure
Chabaux, Francois
Stille, Peter
Rihs, Sophie] Univ Strasbourg, F-67084 Strasbourg, France
[Bagard, Marie-Laure
Chabaux, Francois
Stille, Peter
Rihs, Sophie] CNRS, EOST, LHyGeS, F-67084 Strasbourg, France
[Pokrovsky, Oleg S.
Viers, Jerome
Dupre, Bernard] Observ Midi Pyrenees, UMR 5563, CNRS, LMTG, Paris, France
[Prokushkin, Anatoly S.] SB RAS, VN Sukachev Inst Forest, Krasnoyarsk, Russia
[Schmitt, Anne-Desiree] Univ Franche Comte, CNRS, UMR 6249, F-25030 Besancon, France
Доп.точки доступа:
Bagard, M.L.; Chabaux, F...; Pokrovsky, O.S.; Viers, J...; Prokushkin, A.S.; Stille, P...; Rihs, S...; Schmitt, A.D.; Dupre, B...
Thermal analysis of organic matter in cryogenic soils (Central Siberian Plateau)
[Text] / O. A. Shapchenkova, A. A. Aniskina, S. R. Loskutov // Eurasian Soil Sci. - 2011. - Vol. 44, Is. 4. - P399-406, DOI 10.1134/S1064229311040090. - Cited References: 29. - This work was supported by Integration Project no. 23 (1.3) of the Siberian Branch of the Russian Academy of Sciences (Succession Changes in the Biodiversity in Technogenically Disturbed Ecosystems of Siberia).
. - 8. - ISSN 1064-2293
РУБ Soil Science
Аннотация: The thermal degradation of organic matter was studied in cryogenic soils with methods of thermal analysis: differential scanning calorimetry and thermogravimetry (DSC and TG, respectively). The DSC curves of most of the samples within the temperature range from 221-247A degrees C to 600A degrees C were characterized by the presence of one wide exothermic peak (at 311-373A degrees C) with a shoulder (or without it) on the descending branch at a temperature of about 400A degrees C. This was connected mostly with the destruction of thermolabile compounds (oligo- and polysaccharides) and with the oxidation of low-aromatic complexes of plant residues and humus substances. Two exothermic peaks at 337-373A degrees C and 448-492A degrees C were found for some samples from the organic horizons. The high-temperature peaks were caused by the thermal destruction of lignin. The fraction of the thermolabile organic matter of the soil (237-261aEuro broken vertical bar 331-377A degrees C) reached 59-73% in the organic and 52-59% in the organomineral and mineral horizons.
Полный текст,
WOS,
Scopus
Держатели документа:
[Shapchenkova, O. A.
Aniskina, A. A.
Loskutov, S. R.] Russian Acad Sci, Sukachev Inst Forestry, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Shapchenkova, O.A.; Aniskina, A.A.; Loskutov, S.R.
Аннотация: The thermal degradation of organic matter was studied in cryogenic soils with methods of thermal analysis: differential scanning calorimetry and thermogravimetry (DSC and TG, respectively). The DSC curves of most of the samples within the temperature range from 221-247A degrees C to 600A degrees C were characterized by the presence of one wide exothermic peak (at 311-373A degrees C) with a shoulder (or without it) on the descending branch at a temperature of about 400A degrees C. This was connected mostly with the destruction of thermolabile compounds (oligo- and polysaccharides) and with the oxidation of low-aromatic complexes of plant residues and humus substances. Two exothermic peaks at 337-373A degrees C and 448-492A degrees C were found for some samples from the organic horizons. The high-temperature peaks were caused by the thermal destruction of lignin. The fraction of the thermolabile organic matter of the soil (237-261aEuro broken vertical bar 331-377A degrees C) reached 59-73% in the organic and 52-59% in the organomineral and mineral horizons.
Полный текст,
WOS,
Scopus
Держатели документа:
[Shapchenkova, O. A.
Aniskina, A. A.
Loskutov, S. R.] Russian Acad Sci, Sukachev Inst Forestry, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Shapchenkova, O.A.; Aniskina, A.A.; Loskutov, S.R.
The influence of thinning on the ecological conditions and soil respiration in a larch forest on Hokkaido Island
[Text] / O. V. Masyagina, S. G. Prokushkin, T. . Koike // Eurasian Soil Sci. - 2010. - Vol. 43, Is. 6. - P693-700, DOI 10.1134/S1064229310060104. - Cited References: 26. - The authors thank Prof. Takashi and Prof. Lai Qu from Hokkaido University for help in collecting the material. This study was supported by the Global Environmental Research Foundation of the Ministry of Environment of Japan and by the Russian Foundation for Basic Research (project nos. 03-04-48037 and 07-04-96812).
. - 8. - ISSN 1064-2293
РУБ Soil Science
Аннотация: The effects of cutting on the ecological conditions and soil respiration in larch forests of Japan were studied. The cutting was found to significantly change the soil surface, resulting in the high spatial and temporal variation of the hydrothermal conditions and soil respiration. The influence of a stand's thinning on the environment and soil respiration is considered using the example of the thinning of a ripening larch stand in the Tomakomai National Forest (Hokkaido Island, Japan). The changes in the hydrothermal conditions (the temperature and moisture of the mineral soil layers and litter) and some other factors (the root and litter density and the C/N ratio) after the thinning of the stands and their influence on the soil respiration were studied. The soil respiration in the thinned forest site did not differ from that on the control plot, whereas the soil temperature was much higher in the former. The moisture of the soil mineral layers and the litter was the same. Despite the latter fact, no significant relationships between the soil respiration and its temperature and moisture were found. In the area covered with the thinned forest, the water content of the litter turned out to be the main microclimatic factor affecting the soil respiration. There, the fine roots and litter density were 18 and 15 % less, respectively. The thinning of the stand induced high variation of the soil respiration and temperature, as well as of the fine roots and the litter density. On the whole, the soil respiration in the larch forest studied in Japan was determined by the litter stock and the C to N ratio.
Полный текст,
WOS,
Scopus
Держатели документа:
[Masyagina, O. V.
Prokushkin, S. G.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forestry, Krasnoyarsk 660036, Russia
[Masyagina, O. V.
Koike, T.] Hokkaido Univ, Sapporo, Hokkaido 0608589, Japan
Доп.точки доступа:
Masyagina, O.V.; Prokushkin, S.G.; Koike, T...
Аннотация: The effects of cutting on the ecological conditions and soil respiration in larch forests of Japan were studied. The cutting was found to significantly change the soil surface, resulting in the high spatial and temporal variation of the hydrothermal conditions and soil respiration. The influence of a stand's thinning on the environment and soil respiration is considered using the example of the thinning of a ripening larch stand in the Tomakomai National Forest (Hokkaido Island, Japan). The changes in the hydrothermal conditions (the temperature and moisture of the mineral soil layers and litter) and some other factors (the root and litter density and the C/N ratio) after the thinning of the stands and their influence on the soil respiration were studied. The soil respiration in the thinned forest site did not differ from that on the control plot, whereas the soil temperature was much higher in the former. The moisture of the soil mineral layers and the litter was the same. Despite the latter fact, no significant relationships between the soil respiration and its temperature and moisture were found. In the area covered with the thinned forest, the water content of the litter turned out to be the main microclimatic factor affecting the soil respiration. There, the fine roots and litter density were 18 and 15 % less, respectively. The thinning of the stand induced high variation of the soil respiration and temperature, as well as of the fine roots and the litter density. On the whole, the soil respiration in the larch forest studied in Japan was determined by the litter stock and the C to N ratio.
Полный текст,
WOS,
Scopus
Держатели документа:
[Masyagina, O. V.
Prokushkin, S. G.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forestry, Krasnoyarsk 660036, Russia
[Masyagina, O. V.
Koike, T.] Hokkaido Univ, Sapporo, Hokkaido 0608589, Japan
Доп.точки доступа:
Masyagina, O.V.; Prokushkin, S.G.; Koike, T...
Landscape controls of CH4 fluxes in a catchment of the forest tundra ecotone in northern Siberia
[Text] / H. . Flessa [et al.] // Glob. Change Biol. - 2008. - Vol. 14, Is. 9. - P2040-2056, DOI 10.1111/j.1365-2486.2008.01633.x. - Cited References: 68
. - 17. - ISSN 1354-1013
РУБ Biodiversity Conservation + Ecology + Environmental Sciences
Аннотация: Terrestrial ecosystems in northern high latitudes exchange large amounts of methane (CH4) with the atmosphere. Climate warming could have a great impact on CH4 exchange, in particular in regions where degradation of permafrost is induced. In order to improve the understanding of the present and future methane dynamics in permafrost regions, we studied CH4 fluxes of typical landscape structures in a small catchment in the forest tundra ecotone in northern Siberia. Gas fluxes were measured using a closed-chamber technique from August to November 2003 and from August 2006 to July 2007 on tree-covered mineral soils with and without permafrost, on a frozen bog plateau, and on a thermokarst pond. For areal integration of the CH4 fluxes, we combined field observations and classification of functional landscape structures based on a high-resolution Quickbird satellite image. All mineral soils were net sinks of atmospheric CH4. The magnitude of annual CH4 uptake was higher for soils without permafrost (1.19 kg CH4 ha(-1) yr(-1)) than for soils with permafrost (0.37 kg CH4 ha(-1) yr(-1)). In well-drained soils, significant CH4 uptake occurred even after the onset of ground frost. Bog plateaux, which stored large amounts of frozen organic carbon, were also a net sink of atmospheric CH4 (0.38 kg CH4 ha(-1) yr(-1)). Thermokarst ponds, which developed from permafrost collapse in bog plateaux, were hot spots of CH4 emission (approximately 200 kg CH4 ha(-1) yr(-1)). Despite the low area coverage of thermokarst ponds (only 2.1% of the total catchment area), emissions from these sites resulted in a mean catchment CH4 emission of 3.8 kg CH4 ha(-1) yr(-1). Export of dissolved CH4 with stream water was insignificant. The results suggest that mineral soils and bog plateaux in this region will respond differently to increasing temperatures and associated permafrost degradation. Net uptake of atmospheric CH4 in mineral soils is expected to gradually increase with increasing active layer depth and soil drainage. Changes in bog plateaux will probably be much more rapid and drastic. Permafrost collapse in frozen bog plateaux would result in high CH4 emissions that act as positive feedback to climate warming.
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Полный текст
Держатели документа:
[Flessa, Heiner] Univ Gottingen, Buesgen Inst, D-37077 Gottingen, Germany
[Rodionov, Andrej] Univ Cottbus, Chair Soil Protect & Recultivat, D-03046 Cottbus, Germany
[Rodionov, Andrej
Guggenberger, Georg] Univ Halle Wittenberg, Inst Agr & Nutr Sci, D-06108 Halle, Germany
[Fuchs, Hans
Magdon, Paul] Univ Gottingen, Inst Forest Management, D-37077 Gottingen, Germany
[Shibistova, Olga
Zrazhevskaya, Galina
Mikheyeva, Natalia] SB RAS, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Kasansky, Oleg A.] SB RAS, Permafrost Inst Yakutsk, Field Stn Igarka, Igarka 663200, Russia
[Blodau, Christian] Univ Bayreuth, Dept Hydrol, D-95440 Bayreuth, Germany
Доп.точки доступа:
Flessa, H...; Rodionov, A...; Guggenberger, G...; Fuchs, H...; Magdon, P...; Shibistova, O...; Zrazhevskaya, G...; Mikheyeva, N...; Kasansky, O.A.; Blodau, C...
Рубрики:
METHANE EMISSIONS
CARBON-DIOXIDE
BOREAL FOREST
ARCTIC TUNDRA
ATMOSPHERIC METHANE
DISCONTINUOUS PERMAFROST
MODELING APPROACH
WESTERN SIBERIA
NITROUS-OXIDE
SOILS
Кл.слова (ненормированные):
active layer -- bog -- catchment -- dissolved methane -- forest tundra -- methane emission -- methane uptake -- permafrost -- thaw ponds -- thermokarst
METHANE EMISSIONS
CARBON-DIOXIDE
BOREAL FOREST
ARCTIC TUNDRA
ATMOSPHERIC METHANE
DISCONTINUOUS PERMAFROST
MODELING APPROACH
WESTERN SIBERIA
NITROUS-OXIDE
SOILS
Кл.слова (ненормированные):
active layer -- bog -- catchment -- dissolved methane -- forest tundra -- methane emission -- methane uptake -- permafrost -- thaw ponds -- thermokarst
Аннотация: Terrestrial ecosystems in northern high latitudes exchange large amounts of methane (CH4) with the atmosphere. Climate warming could have a great impact on CH4 exchange, in particular in regions where degradation of permafrost is induced. In order to improve the understanding of the present and future methane dynamics in permafrost regions, we studied CH4 fluxes of typical landscape structures in a small catchment in the forest tundra ecotone in northern Siberia. Gas fluxes were measured using a closed-chamber technique from August to November 2003 and from August 2006 to July 2007 on tree-covered mineral soils with and without permafrost, on a frozen bog plateau, and on a thermokarst pond. For areal integration of the CH4 fluxes, we combined field observations and classification of functional landscape structures based on a high-resolution Quickbird satellite image. All mineral soils were net sinks of atmospheric CH4. The magnitude of annual CH4 uptake was higher for soils without permafrost (1.19 kg CH4 ha(-1) yr(-1)) than for soils with permafrost (0.37 kg CH4 ha(-1) yr(-1)). In well-drained soils, significant CH4 uptake occurred even after the onset of ground frost. Bog plateaux, which stored large amounts of frozen organic carbon, were also a net sink of atmospheric CH4 (0.38 kg CH4 ha(-1) yr(-1)). Thermokarst ponds, which developed from permafrost collapse in bog plateaux, were hot spots of CH4 emission (approximately 200 kg CH4 ha(-1) yr(-1)). Despite the low area coverage of thermokarst ponds (only 2.1% of the total catchment area), emissions from these sites resulted in a mean catchment CH4 emission of 3.8 kg CH4 ha(-1) yr(-1). Export of dissolved CH4 with stream water was insignificant. The results suggest that mineral soils and bog plateaux in this region will respond differently to increasing temperatures and associated permafrost degradation. Net uptake of atmospheric CH4 in mineral soils is expected to gradually increase with increasing active layer depth and soil drainage. Changes in bog plateaux will probably be much more rapid and drastic. Permafrost collapse in frozen bog plateaux would result in high CH4 emissions that act as positive feedback to climate warming.
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Полный текст
Держатели документа:
[Flessa, Heiner] Univ Gottingen, Buesgen Inst, D-37077 Gottingen, Germany
[Rodionov, Andrej] Univ Cottbus, Chair Soil Protect & Recultivat, D-03046 Cottbus, Germany
[Rodionov, Andrej
Guggenberger, Georg] Univ Halle Wittenberg, Inst Agr & Nutr Sci, D-06108 Halle, Germany
[Fuchs, Hans
Magdon, Paul] Univ Gottingen, Inst Forest Management, D-37077 Gottingen, Germany
[Shibistova, Olga
Zrazhevskaya, Galina
Mikheyeva, Natalia] SB RAS, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Kasansky, Oleg A.] SB RAS, Permafrost Inst Yakutsk, Field Stn Igarka, Igarka 663200, Russia
[Blodau, Christian] Univ Bayreuth, Dept Hydrol, D-95440 Bayreuth, Germany
Доп.точки доступа:
Flessa, H...; Rodionov, A...; Guggenberger, G...; Fuchs, H...; Magdon, P...; Shibistova, O...; Zrazhevskaya, G...; Mikheyeva, N...; Kasansky, O.A.; Blodau, C...
Features of moss mat structure and productivity in forest-bog complexes of West Siberia
[Text] / I. A. Goncharova // Contemp. Probl. Ecol. - 2008. - Vol. 1, Is. 4. - P467-475, DOI 10.1134/S1995425508040127. - Cited References: 18. - The work was financially supported by Krasnoyarsk Krai Scientific Foundation, grant 16G066.
. - 9. - ISSN 1995-4255
РУБ Ecology
Аннотация: The species composition and distribution of mosses over microrelief features on bogs have been assessed with various types of the water-mineral nutrient supply. The density of moss stalks in different moss species mats has been examined. Fraction analysis has been applied to weight and morphological characteristics of moss stalks. The contributions made by each fraction to the biomass production have been estimated. The linear and weight parameters of the photosynthesizing layer in mosses have been determined.
Полный текст,
WOS
Держатели документа:
RAS, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Goncharova, I.A.
Аннотация: The species composition and distribution of mosses over microrelief features on bogs have been assessed with various types of the water-mineral nutrient supply. The density of moss stalks in different moss species mats has been examined. Fraction analysis has been applied to weight and morphological characteristics of moss stalks. The contributions made by each fraction to the biomass production have been estimated. The linear and weight parameters of the photosynthesizing layer in mosses have been determined.
Полный текст,
WOS
Держатели документа:
RAS, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Goncharova, I.A.
Storage and mobility of black carbon in permafrost soils of the forest tundra ecotone in Northern Siberia
[Text] / G. . Guggenberger [et al.] // Glob. Change Biol. - 2008. - Vol. 14, Is. 6. - P1367-1381, DOI 10.1111/j.1365-2486.2008.01568.x. - Cited References: 72
. - 15. - ISSN 1354-1013
РУБ Biodiversity Conservation + Ecology + Environmental Sciences
Аннотация: Boreal permafrost soils store large amounts of organic carbon (OC). Parts of this carbon (C) might be black carbon (BC) generated during vegetation fires. Rising temperature and permafrost degradation is expected to have different consequences for OC and BC, because BC is considered to be a refractory subfraction of soil organic matter. To get some insight into stocks, variability, and characteristics of BC in permafrost soils, we estimated the benzene polycarboxylic acid (BPCA) method-specific composition and storage of BC, i.e. BPCA-BC, in a 0.44 km(2)-sized catchment at the forest tundra ecotone in northern Siberia. Furthermore, we assessed the BPCA-BC export with the stream draining the catchment. The catchment is composed of various landscape units with south-southwest (SSW) exposed mineral soils characterized by thick active layer or lacking permafrost, north-northeast (NNE) faced mineral soils with thin active layer, and permafrost-affected raised bogs in plateau positions showing in part thermokarst formation. There were indications of vegetation fires at all landscape units. BC was ubiquitous in the catchment soils and BPCA-BC amounted to 0.6-3.0% of OC. This corresponded to a BC storage of 22-3440 g m(-2). The relative contribution of BPCA-BC to OC, as well as the absolute stocks of BPCA-BC were largest in the intact bogs with a shallow active layer followed by mineral soils of the NNE aspects. In both landscape units, a large proportion of BPCA-BC was stored within the permafrost. In contrast, mineral soils with thick active layer or lacking permafrost and organic soils subjected to thermokarst formation stored less BPCA-BC. Permafrost is, hence, not only a crucial factor in the storage of OC but also of BC. In the stream water BPCA-BC amounted on an average to 3.9% of OC, and a yearly export of 0.10 g BPCA-BC m(-2) was calculated, most of it occurring during the period of snow melt with dominance of surface flow. This suggests that BC mobility in dissolved and colloidal phase is an important pathway of BC export from the catchment. Such a transport mechanism may explain the high BC concentrations found in sediments of the Arctic Ocean.
WOS,
Scopus,
Полный текст
Держатели документа:
[Guggenberger, Georg
Rodionov, Andrej
Grabe, Matthias] Univ Halle Wittenberg, Inst Agr & Nutr Sci, D-06108 Halle, Germany
[Rodionov, Andrej] Brandenburg Tech Univ Cottbus, Chair Soil Protect & Recultivat, D-03013 Cottbus, Germany
[Shibistova, Olga
Mikheyeva, Natalia
Zrazhevskaya, Galina] RAS, VN Sukachev Inst Forest, Akademgorodok, Krasnoyarsk 660036, Russia
[Grabe, Matthias] Max Planck Inst Biogeochem, D-07745 Jena, Germany
[Kasansky, Oleg A.] RAS, SB, Field Stn Igarka, Permafrost Inst Yakutsk, Igarka 663200, Russia
[Fuchs, Hans] Univ Gottingen, Inst Forest Management & Yield Sci, D-37077 Gottingen, Germany
[Flessa, Heiner] Univ Gottingen, Inst Soil Sci & Forest Nutr, D-37077 Gottingen, Germany
Доп.точки доступа:
Guggenberger, G...; Rodionov, A...; Shibistova, O...; Grabe, M...; Kasansky, O.A.; Fuchs, H...; Mikheyeva, N...; Zrazhevskaya, G...; Flessa, H...
Рубрики:
DISSOLVED ORGANIC-MATTER
SCOTS PINE FORESTS
BOREAL FOREST
ISOTOPE GEOCHEMISTRY
PYROGENIC CARBON
ARCTIC TUNDRA
STATE C-13
FIRE
CHARCOAL
ECOSYSTEMS
Кл.слова (ненормированные):
active layer -- benzene polycarboxylic acid method -- black carbon -- catchment -- forest tundra -- permafrost -- raised bogs -- soil organic carbon -- thermokarst -- topography
DISSOLVED ORGANIC-MATTER
SCOTS PINE FORESTS
BOREAL FOREST
ISOTOPE GEOCHEMISTRY
PYROGENIC CARBON
ARCTIC TUNDRA
STATE C-13
FIRE
CHARCOAL
ECOSYSTEMS
Кл.слова (ненормированные):
active layer -- benzene polycarboxylic acid method -- black carbon -- catchment -- forest tundra -- permafrost -- raised bogs -- soil organic carbon -- thermokarst -- topography
Аннотация: Boreal permafrost soils store large amounts of organic carbon (OC). Parts of this carbon (C) might be black carbon (BC) generated during vegetation fires. Rising temperature and permafrost degradation is expected to have different consequences for OC and BC, because BC is considered to be a refractory subfraction of soil organic matter. To get some insight into stocks, variability, and characteristics of BC in permafrost soils, we estimated the benzene polycarboxylic acid (BPCA) method-specific composition and storage of BC, i.e. BPCA-BC, in a 0.44 km(2)-sized catchment at the forest tundra ecotone in northern Siberia. Furthermore, we assessed the BPCA-BC export with the stream draining the catchment. The catchment is composed of various landscape units with south-southwest (SSW) exposed mineral soils characterized by thick active layer or lacking permafrost, north-northeast (NNE) faced mineral soils with thin active layer, and permafrost-affected raised bogs in plateau positions showing in part thermokarst formation. There were indications of vegetation fires at all landscape units. BC was ubiquitous in the catchment soils and BPCA-BC amounted to 0.6-3.0% of OC. This corresponded to a BC storage of 22-3440 g m(-2). The relative contribution of BPCA-BC to OC, as well as the absolute stocks of BPCA-BC were largest in the intact bogs with a shallow active layer followed by mineral soils of the NNE aspects. In both landscape units, a large proportion of BPCA-BC was stored within the permafrost. In contrast, mineral soils with thick active layer or lacking permafrost and organic soils subjected to thermokarst formation stored less BPCA-BC. Permafrost is, hence, not only a crucial factor in the storage of OC but also of BC. In the stream water BPCA-BC amounted on an average to 3.9% of OC, and a yearly export of 0.10 g BPCA-BC m(-2) was calculated, most of it occurring during the period of snow melt with dominance of surface flow. This suggests that BC mobility in dissolved and colloidal phase is an important pathway of BC export from the catchment. Such a transport mechanism may explain the high BC concentrations found in sediments of the Arctic Ocean.
WOS,
Scopus,
Полный текст
Держатели документа:
[Guggenberger, Georg
Rodionov, Andrej
Grabe, Matthias] Univ Halle Wittenberg, Inst Agr & Nutr Sci, D-06108 Halle, Germany
[Rodionov, Andrej] Brandenburg Tech Univ Cottbus, Chair Soil Protect & Recultivat, D-03013 Cottbus, Germany
[Shibistova, Olga
Mikheyeva, Natalia
Zrazhevskaya, Galina] RAS, VN Sukachev Inst Forest, Akademgorodok, Krasnoyarsk 660036, Russia
[Grabe, Matthias] Max Planck Inst Biogeochem, D-07745 Jena, Germany
[Kasansky, Oleg A.] RAS, SB, Field Stn Igarka, Permafrost Inst Yakutsk, Igarka 663200, Russia
[Fuchs, Hans] Univ Gottingen, Inst Forest Management & Yield Sci, D-37077 Gottingen, Germany
[Flessa, Heiner] Univ Gottingen, Inst Soil Sci & Forest Nutr, D-37077 Gottingen, Germany
Доп.точки доступа:
Guggenberger, G...; Rodionov, A...; Shibistova, O...; Grabe, M...; Kasansky, O.A.; Fuchs, H...; Mikheyeva, N...; Zrazhevskaya, G...; Flessa, H...
Organic carbon and total nitrogen variability in permafrost-affected soils in a forest tundra ecotone
[Text] / A. . Rodionov [et al.] // Eur. J. Soil Sci. - 2007. - Vol. 58, Is. 6. - P1260-1272, DOI 10.1111/j.1365-2389.2007.00919.x. - Cited References: 44
. - 13. - ISSN 1351-0754
РУБ Soil Science
Аннотация: Soils of the high latitudes are expected to respond sensitively to climate change, but still little is known about carbon and nitrogen variability in them. We investigated the 0.44-km(2) Little Grawijka Creek catchment of the forest tundra ecotone (northern Krasnoyarsk Krai, Russian Federation) in order (i) to relate the active-layer thickness to controlling environmental factors, (ii) to quantify soil organic carbon (SOC) and total nitrogen (NT) stocks, and (iii) to assess their variability with respect to different landscape units. The catchment was mapped on a 50 x 50 m grid for topography, dominant tree and ground vegetation, organic-layer and moss-layer thickness, and active-layer thickness. At each grid point, bulk density, and SOC and NT concentrations were determined for depth increments. At three selected plots, 2-m deep soil cores were taken and analysed for SOC, NT and C-14. A shallow active layer was found in intact raised bogs at plateaux situations and in mineral soils of north-northeast (NNE) aspect. Good drainage and greater solar insolation on the south-southwest (SSW) slopes are reflected in deeper active layers or lack of permafrost. Organic carbon stocks to a soil depth of 90 cm varied between 5 and 95 kg m(-2). The greatest stocks were found in the intact raised bogs and on the NNE slopes. Canonical correspondence analysis indicates the dominant role of active-layer thickness for SOC and NT storage. The 2-m soil cores suggest that permafrost soils store about the same amount of SOC from 90 to 200 cm as in the upper 90 cm. Most of this deep SOC pool was formed in the mid-Holocene (organic soils) and the late Pleistocene (mineral soils). Our results showed that even within a small catchment of the forest tundra, active-layer thickness and, hence, SOC and NT storage vary greatly within the landscape mosaic. This has to be taken into account when using upscaling methods such as remote sensing for assessing SOC and NT storage and cycling at a regional to continental level.
WOS,
Scopus
Держатели документа:
Univ Halle Wittenberg, Inst Agr & Ernahrungswissensch, D-06108 Halle, Germany
Univ Gottingen, Inst Bodenkunde & Waldernahrung, D-37077 Gottingen, Germany
Max Planck Inst Biogeochem, D-07745 Jena, Germany
SB RAS, Field Stn Igarka Permafrost Inst Yakutsk, Igarka 663200, Russia
SB RAS, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Rodionov, A...; Flessa, H...; Grabe, M...; Kazansky, O.A.; Shibistova, O...; Guggenberger, G...
Рубрики:
MONITORING CALM SITES
BOREAL PEATLANDS
ARCTIC TUNDRA
STORAGE
ALASKA
MATTER
DYNAMICS
GRADIENT
QUALITY
FLUXES
MONITORING CALM SITES
BOREAL PEATLANDS
ARCTIC TUNDRA
STORAGE
ALASKA
MATTER
DYNAMICS
GRADIENT
QUALITY
FLUXES
Аннотация: Soils of the high latitudes are expected to respond sensitively to climate change, but still little is known about carbon and nitrogen variability in them. We investigated the 0.44-km(2) Little Grawijka Creek catchment of the forest tundra ecotone (northern Krasnoyarsk Krai, Russian Federation) in order (i) to relate the active-layer thickness to controlling environmental factors, (ii) to quantify soil organic carbon (SOC) and total nitrogen (NT) stocks, and (iii) to assess their variability with respect to different landscape units. The catchment was mapped on a 50 x 50 m grid for topography, dominant tree and ground vegetation, organic-layer and moss-layer thickness, and active-layer thickness. At each grid point, bulk density, and SOC and NT concentrations were determined for depth increments. At three selected plots, 2-m deep soil cores were taken and analysed for SOC, NT and C-14. A shallow active layer was found in intact raised bogs at plateaux situations and in mineral soils of north-northeast (NNE) aspect. Good drainage and greater solar insolation on the south-southwest (SSW) slopes are reflected in deeper active layers or lack of permafrost. Organic carbon stocks to a soil depth of 90 cm varied between 5 and 95 kg m(-2). The greatest stocks were found in the intact raised bogs and on the NNE slopes. Canonical correspondence analysis indicates the dominant role of active-layer thickness for SOC and NT storage. The 2-m soil cores suggest that permafrost soils store about the same amount of SOC from 90 to 200 cm as in the upper 90 cm. Most of this deep SOC pool was formed in the mid-Holocene (organic soils) and the late Pleistocene (mineral soils). Our results showed that even within a small catchment of the forest tundra, active-layer thickness and, hence, SOC and NT storage vary greatly within the landscape mosaic. This has to be taken into account when using upscaling methods such as remote sensing for assessing SOC and NT storage and cycling at a regional to continental level.
WOS,
Scopus
Держатели документа:
Univ Halle Wittenberg, Inst Agr & Ernahrungswissensch, D-06108 Halle, Germany
Univ Gottingen, Inst Bodenkunde & Waldernahrung, D-37077 Gottingen, Germany
Max Planck Inst Biogeochem, D-07745 Jena, Germany
SB RAS, Field Stn Igarka Permafrost Inst Yakutsk, Igarka 663200, Russia
SB RAS, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Rodionov, A...; Flessa, H...; Grabe, M...; Kazansky, O.A.; Shibistova, O...; Guggenberger, G...
Source- and substrate-specific export of dissolved organic matter from permafrost-dominated forested watershed in central Siberia
[Text] / A. S. Prokushkin [et al.] // Glob. Biogeochem. Cycle. - 2007. - Vol. 21, Is. 4. - Ст. GB4003, DOI 10.1029/2007GB002938. - Cited References: 39
. - 12. - ISSN 0886-6236
РУБ Environmental Sciences + Geosciences, Multidisciplinary + Meteorology & Atmospheric Sciences
Аннотация: Terrestrial and aquatic dissolved organic matter (DOM) was characterized to trace the likely processes of DOM formation and stream export in a permafrost-dominated watershed in central Siberia. Stream samples were collected in spring (May-June 2003) and summer (July-August 2003) at both low flow and stormflow. Dissolved organic matter was analyzed by pyrolysis/gas chromatography/mass spectrometry, and identified pyrolysis products were simultaneously analyzed for compound-specific isotope ratios by isotope ratio mass spectrometry. Pyrograms of terrestrial and stream DOM contained a similar series of pyrolysis products, suggesting a terrestrial origin for DOM in the small stream draining our study catchment. However, despite the overall similarity of chemical composition of stream DOM at different seasons, we also observed distinct differences in isotopic fingerprint between seasons and hydrologic phases ( stormflow versus low flow). This variation appears to be due to the changing origin of stream DOM from different soil layers and the catchment sources following permafrost thawing during the frost-free period. In general, chemical and isotopic composition of stream DOM was similar to DOM produced in soils of colder north facing slopes ( P 0.01) with a shallow active layer. South facing slopes with deeper active layers produce little DOM that enters the stream, suggesting that DOM produced in the active layer is retained and stabilized in underlying, unfrozen mineral soils. Climate change that results in additional seasonal thawing of permafrost-dominated landscapes will decrease the amount of DOM exported to riverine systems and change its chemical composition.
WOS
Держатели документа:
Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Max Planck Inst Biogeochem, D-07745 Jena, Germany
Univ New Hampshire, Durham, NH 03824 USA
Доп.точки доступа:
Prokushkin, A.S.; Gleixner, G...; McDowell, W.H.; Ruehlow, S...; Schulze, E.D.
Рубрики:
CHROMATOGRAPHY-MASS-SPECTROMETRY
PRECAMBRIAN SHIELD
PYROLYSIS PRODUCTS
CARBON
SOILS
DOC
TEMPERATURE
CATCHMENTS
DYNAMICS
STORAGE
CHROMATOGRAPHY-MASS-SPECTROMETRY
PRECAMBRIAN SHIELD
PYROLYSIS PRODUCTS
CARBON
SOILS
DOC
TEMPERATURE
CATCHMENTS
DYNAMICS
STORAGE
Аннотация: Terrestrial and aquatic dissolved organic matter (DOM) was characterized to trace the likely processes of DOM formation and stream export in a permafrost-dominated watershed in central Siberia. Stream samples were collected in spring (May-June 2003) and summer (July-August 2003) at both low flow and stormflow. Dissolved organic matter was analyzed by pyrolysis/gas chromatography/mass spectrometry, and identified pyrolysis products were simultaneously analyzed for compound-specific isotope ratios by isotope ratio mass spectrometry. Pyrograms of terrestrial and stream DOM contained a similar series of pyrolysis products, suggesting a terrestrial origin for DOM in the small stream draining our study catchment. However, despite the overall similarity of chemical composition of stream DOM at different seasons, we also observed distinct differences in isotopic fingerprint between seasons and hydrologic phases ( stormflow versus low flow). This variation appears to be due to the changing origin of stream DOM from different soil layers and the catchment sources following permafrost thawing during the frost-free period. In general, chemical and isotopic composition of stream DOM was similar to DOM produced in soils of colder north facing slopes ( P 0.01) with a shallow active layer. South facing slopes with deeper active layers produce little DOM that enters the stream, suggesting that DOM produced in the active layer is retained and stabilized in underlying, unfrozen mineral soils. Climate change that results in additional seasonal thawing of permafrost-dominated landscapes will decrease the amount of DOM exported to riverine systems and change its chemical composition.
WOS
Держатели документа:
Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Max Planck Inst Biogeochem, D-07745 Jena, Germany
Univ New Hampshire, Durham, NH 03824 USA
Доп.точки доступа:
Prokushkin, A.S.; Gleixner, G...; McDowell, W.H.; Ruehlow, S...; Schulze, E.D.
The influence of heating on organic matter of forest litters and soils under experimental conditions
[Text] / A. S. Prokushkin, I. V. Tokareva // Eurasian Soil Sci. - 2007. - Vol. 40, Is. 6. - P628-635, DOI 10.1134/S106422930706004X. - Cited References: 35
. - 8. - ISSN 1064-2293
РУБ Soil Science
Аннотация: The specific features of changes in the content and mobility of organic matter in litters and cryogenic soils under heating were revealed. The thermal stability of the organic matter and litters is different. In the soils, the maximal loss of matter was recorded at a temperature of 300 degrees C. In the litters, the maximal losses were found at 300, 400 and 550 degrees C and depended inversely on the carbon content in them. The heating to 200 degrees C caused insignificant changes in the mass of the litters and soils but increased the content of the water-soluble fraction of organic matter and the concentration of the water-soluble mineral nitrogen forms.
Полный текст,
Scopus,
WOS
Держатели документа:
Russian Acad Sci, Siberian Div, Sukachev Inst Forestry, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Prokushkin, A.S.; Tokareva, I.V.
Аннотация: The specific features of changes in the content and mobility of organic matter in litters and cryogenic soils under heating were revealed. The thermal stability of the organic matter and litters is different. In the soils, the maximal loss of matter was recorded at a temperature of 300 degrees C. In the litters, the maximal losses were found at 300, 400 and 550 degrees C and depended inversely on the carbon content in them. The heating to 200 degrees C caused insignificant changes in the mass of the litters and soils but increased the content of the water-soluble fraction of organic matter and the concentration of the water-soluble mineral nitrogen forms.
Полный текст,
Scopus,
WOS
Держатели документа:
Russian Acad Sci, Siberian Div, Sukachev Inst Forestry, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Prokushkin, A.S.; Tokareva, I.V.
Role of the phytogenic field of larch of the prefire generation in forming edaphic conditions in burned-out forest areas
[Text] / S. G. Prokushkin [et al.] // Biol. Bull. - 2004. - Vol. 31, Is. 1. - P42-50, DOI 10.1023/B:BIBU.0000014354.31389.6c. - Cited References: 26
. - 9. - ISSN 1062-3590
РУБ Biology
Аннотация: It is shown that larch of the prefire generation is the main edificator at the early stages of progressive successions in burned-out areas. Its environment-forming effect manifests itself most strongly in the phytogenic field of living trees, where edaphic conditions similar to those in primary larch forests are formed within ten years after the fire. This is accompanied by an increase in the numbers of microorganisms utilizing organic and mineral nitrogen, as well as in the rate of nitrogen mineralization in plant microgroups of this zone. Hence, living trees remaining in a burned-out area promote restoration of the initial edaphic conditions.
Полный текст,
WOS,
Scopus,
Scopus
Держатели документа:
Russian Acad Sci, Siberian Div, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Prokushkin, S.G.; Bugaenko, T.N.; Sorokin, N.D.; Kaverzina, L.N.; Zyryanova, O.A.
Аннотация: It is shown that larch of the prefire generation is the main edificator at the early stages of progressive successions in burned-out areas. Its environment-forming effect manifests itself most strongly in the phytogenic field of living trees, where edaphic conditions similar to those in primary larch forests are formed within ten years after the fire. This is accompanied by an increase in the numbers of microorganisms utilizing organic and mineral nitrogen, as well as in the rate of nitrogen mineralization in plant microgroups of this zone. Hence, living trees remaining in a burned-out area promote restoration of the initial edaphic conditions.
Полный текст,
WOS,
Scopus,
Scopus
Держатели документа:
Russian Acad Sci, Siberian Div, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Prokushkin, S.G.; Bugaenko, T.N.; Sorokin, N.D.; Kaverzina, L.N.; Zyryanova, O.A.