Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

: материалы временных коллективов / Y. Matsuura, A. P. Abaimov // Proceedings of the eighth symposium on the joint Siberian permafrost studies between Japan and Russia in 1999. - Onogawa : National Institute for Environmental Studies, 2000. - С. 129-134. - Библиогр. в конце ст.
Аннотация: Our results of net N mineralization rates in TEF, continuous permafrost region, were much lower than those in boreal forest and arctic tundra.

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Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28

Доп.точки доступа:
Abaimov, Anatoly Platonovich ; Абаимов Анатолий Платонович; Матсуура У.

: материалы временных коллективов / G. Guggenberger [и др.] // Climatic changes and their impact on boreal and temperate forests: Abstracts of the International conference (June 5-7, Ekaterinburg, Russia) : Ural State Forest Engineering University, 2006. - С. 32-33

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Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28

Доп.точки доступа:
Guggenberger, G.; Гугенбергер Г.; Rodionov, Andrej; Родионов Андрей; Flessa, H.; Флесса Х.; Shibistova, Olga Borisovna; Шибистова, Ольга Борисовна

: материалы временных коллективов / E. F. Vedrova // Climatic changes and their impact on boreal and temperate forests: Abstracts of the International conference (June 5-7, Ekaterinburg, Russia) : Ural State Forest Engineering University, 2006. - С. 103

Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28

Доп.точки доступа:
Ведрова, Эстелла Федоровна

: материалы временных коллективов / G. Guggenberger [и др.] // Climate change and their impact on boreal and temperate forests: Abstracts of the International Conference (June 5-7, 2006, Ekaterinburg, Russia). - 2006. - С. 32

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Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50, стр., 28

Доп.точки доступа:
Guggenberger, G.; Гугенбергер Г.; Rodionov, Andrej; Flessa, H.; Флесса Х.; Shibistova, Olga Borisovna; Шибистова, Ольга Борисовна
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: материалы временных коллективов / E. F. Vedrova // Climate change and their impact on boreal and temperate forests: Abstracts of the International Conference (June 5-7, 2006, Ekaterinburg, Russia). - 2006. - С. 103

Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50, стр., 28

Доп.точки доступа:
Ведрова, Эстелла Федоровна
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РСФ (05.02.2008г. (1 экз.) - Б.ц.) - свободны 1

: absracts / V. I. Kharuk [и др.] // Enviromis. International conference on enviromental observations, modelling and information systems, Tomsk, Russia, July 1-8, 2006: program and abstracts. - 2006. - С. 92
Аннотация: The purpose of this study is an analysis of tree growth changes in the mountain forest-tundra ecotone of Western Sayan in a context of climatic trends.

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Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50, стр., 28

Доп.точки доступа:
Kharuk, Vyacheslav Ivanovich; Харук, Вячеслав Иванович; Ranson, K.J.; Рэнсон К.Дж.; Dvinskaya, Mariya Leonidovna; Двинская, Мария Леонидовна; Im, Sergey Tkhekdyeyevich; Им, Сергей Тхекдеевич
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РСФ (12.03.2008г. (1 экз.) - Б.ц.) - свободны 1

: материалы временных коллективов / V. I. Kharuk [и др.] // Environmental change in Siberia: earth observation, field studies and modelling. - Dordrecht et. al. : Springer, 2010. - С. 115-132. - Библиогр. в конце ст.
Аннотация: The tree response to climate trends is most likely observable in the forest-tundra ecotone where temperature limits tree growth. Here we show that trees in the forest-tundra ecotone of the mid of the south Siberian Mountains responded strongly to wasrmer temperatures during the past two decades. There was a growth increment increase, stand densification, regeneration propogation into the alpine tundra, and transformation of prostrate Siberian pine, larch and fir into another arboreal forms.

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Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50/28

Доп.точки доступа:
Kharuk, Vyacheslav Ivanovich; Харук, Вячеслав Иванович; Ranson, K.J.; Рэнсон К.Дж.; Dvinskaya, Mariya Leonidovna; Двинская, Мария Леонидовна; Im, Sergey Tkhekdyeyevich; Им, Сергей Тхекдеевич

: материалы временных коллективов / N. M. Tchebakova [и др.] // Boreal forests in a changing world: challenges and needs for action: Proceedings of the International conference August 15-21 2011, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of forest SB RAS, 2011. - С. 95-100. - Библиогр. в конце ст.
Аннотация: Daily, seasonal and annual dynamics of energy (radiation and neat balance components) and mass (water and carbon dioxide) exchange between the atmosphere and major Siberian ecosystems: a pine forerst, a Sphagnum bog, a true steppe, and a tussock tundra along the yenisei meridian (about 90 graduates E) were analyzed from eddy covariance mrasurements obtained during 1998-2000 and 2002-2004 in the flame of the Siberia-Carbon and TCOS-Siberia projects. All these ecosystems were found to be a carbon of a different strength: -38,-52,-115 and -156 gCm -2 yr in the tundra, bog, steppe, and forest respectively.

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Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28

Доп.точки доступа:
Tchebakova, Nadezhda Mikhailovna; Чебакова, Надежда Михайловна; Arneth, A.; Арнес А.; Parfenova, Elena Ivanovna; Парфенова, Елена Ивановна; Vaganov, Yevgeny Alexandrovich; Ваганов Евгений Александрович

: материалы временных коллективов / A. V. Kirdyanov [и др.] // Boreal forests in a changing world: challenges and needs for action: Proceedings of the International conference August 15-21 2011, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of forest SB RAS, 2011. - С. 222-226. - Библиогр. в конце ст.
Аннотация: Larch stand structure and vegetation changes along the longitudinal transect in the Putorana Mountains, Northen Siberia were studied to assess how forest-tundra ecotone has shifted during the last century in an extremely remote and untouched area in Eurasia. In summary, our study demonstrates that ongoing climatic changes led to an upslope expansion of forests in the remote Putorana Mountains, which alters the stand structure and productivity of forest-tundra ecotone. However, these vegetation changes are very likely of minor importance for aboveground carbon sequestration.

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Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28

Доп.точки доступа:
Kirdyanov, Alexandr Viktorovich; Кирдянов, Александр Викторович; Knorre, Anastasiya Aleksyeyevna; Кнорре, Анастасия Алексеевна; Fedotova, Elena Viktorovna; Федотова, Елена Викторовна; Vaganov, Yevgeny Alexandrovich; Ваганов Евгений Александрович; Naurzbaev, Mukhtar Mukhametovich; Наурзбаев, Мухтар Мухаметович

: материалы временных коллективов / A. V. Shashkin [и др.] // Boreal forests in a changing world: challenges and needs for action: Proceedings of the International conference August 15-21 2011, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of forest SB RAS, 2011. - С. 267-270. - Библиогр. в конце ст.
Аннотация: Experimental stands were situated along two altitudinal transects in permafrost between the upper border of closed forest and upper tree-line. Better hydrothermal properties of soil affect higher radial growth rate and good biometric parameters of larch trees, growing along the upper boundary "an open larch stand - tundra" in comparison with those in the lower stands, despite the fact that they have later start of growth. The result is another argument in favor of this point of view: along a tree-line favorable hydrothermal soil conditions develop at any change scenario (cooling or warming).

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Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28

Доп.точки доступа:
Shashkin, Alexandr Vladimirovich; Шашкин, Александр Владимирович; Benkova, Vera Yefimovna; Бенькова, Вера Ефимовна; Prokushkin, Anatoly Stanislavovich; Прокушкин, Анатолий Станиславович; Simanko, A.V.; Симанко А.В.; Naurzbaev, Mukhtar Mukhametovich; Наурзбаев, Мухтар Мухаметович

: материалы временных коллективов / L. V. Mukhortova // Boreal forests in a changing world: challenges and needs for action: Proceedings of the International conference August 15-21 2011, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of forest SB RAS, 2011. - С. 333-337. - Библиогр. в конце ст.
Аннотация: To assess the role of coarse woody debris (CWD) in carbon and nutrient cycling in forest ecosystems of Central Siberia, we investigated changes in carbon, nitrogen and nutrients of differently decomposed CWD samples from the forest tundra and northern, middle, and southern taiga of Central Siberia. At northern latitudes CWD released larger amount of carbon and nutrients during decomposition compared with southern ecosystems, which were characterized nutrient immobilization and smaller carbon losses from CWD.

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Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28

Доп.точки доступа:
Мухортова, Людмила Владимировна

: материалы временных коллективов / M. V. Skomarkova // Workshop on climate change, the tree growth response, and reconstruction of climate 25-29 January 2006, V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of Forest SB RAS, 2006. - С. 29
Аннотация: Our results show that the main contribution to changes in annual biomass productivity in forest-tundra and northern taiga ecosystems under the predicted climatic changes will be determined by living ground cover.

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Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28

Доп.точки доступа:
Кнорре, Анастасия Алексеевна

: материалы временных коллективов / V. I. Kharuk, M. Dvinskaya, S.T. Im, K. Ranson // Arctic, Antarctic and Alpine Research. - 2011. - Vol. 43, № 4. - С. 593-600. - Библиогр. в конце ст.
Аннотация: Trees in the southern Siberian Mountains forest-tundra ecotone have considerably increased their radial and apical growth increments during the last few decades. This leads to the widespread vertical transformation of mat and prostrate krummholz forms of larch (Larix sibirica Ledeb) and Siberian pine (Pinus sibirica Du Tour). An analysis of the radial growth increments showed that these transformations began in the mid-1980s. Larch showed a greater resistance to the harsh alpine environment and attained a vertical growth form in areas where Siberian pine is still krummholz and etc.

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Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28

Доп.точки доступа:
Ranson, K.J.; Рэнсон К.Дж.; Dvinskaya, Mariya Leonidovna; Двинская, Мария Леонидовна; Im, Sergey Tkhekdyeyevich; Им, Сергей Тхекдеевич; Харук, Вячеслав Иванович
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ЧЗ (05.03.2008г. (1 экз.) - Б.ц.) - свободны 1

[Текст] = Anatomical characteristics of wood at various heights in the stems of gmelin larch trees growing in the upper treeline ecotone (Taymyr) : материалы временных коллективов / В. В. Симанько // 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. 47-50. - Библиогр. в конце ст.
Аннотация: Larch trees growing at the places in the upper border "open larch stand - tundra" and the upper border closed forest - open forest situated at the upper tree-line ecotone, were under study. Anatomical structure of tree rings at various stem heights, were investigatted. Better hydrothermal conditions in upper border of the "open larch stand - tundra" facilitate the formation of hinger number of cells and larder radial cell size in trees in comparison with those in the closed stand. These differences are related to adaptation of larch conducting tissue to correspond hydrothermal soil conditions.

Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50/28

Доп.точки доступа:
Siman'ko Valentina Vital'yevna

/ M. I. Makarov [et al.] // Eurasian Soil Sci. - 2013. - Vol. 46, Is. 7. - P778-787, DOI 10.1134/S1064229313070053. - Cited References: 32. - This study was supported by the Russian Foundation for Basic Research (project no. 10-04-00780). . - 10. - ISSN 1064-2293РУБ Soil Science

Аннотация: The drying of samples of mountain-meadow soils characterized by their permanently high moisture under natural conditions fundamentally changes the concentrations of the labile nitrogen and carbon compounds, as well as the patterns of their microbial transformation. When the soil samples are dried, a four- to fivefold increase in the content of the extractable organic nitrogen compounds, carbon compounds, and inorganic nitrogen compounds is observed, while the content of nitrogen and carbon of the microbial biomass decreases by two-three times. The rewetting of the dried soil launches the process of the replenishment of the nitrogen and carbon reserves in the microbial biomass. However, even after two weeks of incubation, their values were 1.5-2 times lower than the initial values typical of the natural soil. The restoration of the microbial community in the samples of the previously dried soils occurs in the absence of a deficiency of labile organic compounds and is accompanied by their active mineralization and the low uptake of ammonium nitrogen by the microorganisms.

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Makarov, M. I.
Mulyukova, O. S.
Malysheva, T. I.] Moscow MV Lomonosov State Univ, Fac Soil Sci, Moscow 119992, Russia
[Menyailo, O. V.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forestry, Krasnoyarsk, Russia

Доп.точки доступа:
Makarov, M.I.; Mulyukova, O.S.; Malysheva, T.I.; Menyailo, O.V.

/ A. V. Kirdyanov, A. S. Prokushkin, M. A. Tabakova // Dendrochronologia. - 2013. - Vol. 31, Is. 2. - P114-119, DOI 10.1016/j.dendro.2012.10.003. - Cited References: 54. - The study was financed by Russian Foundation for Basic Research (12-04-00542), Swiss NSF (SCOPES IZ73Z0_128035) and the Grant of the Government of RF for outstanding scientists No. 11.G34.31.0014 to Prof. E.-D.Schulze. Work of TMA was also supported by the Grant of the President of RF for Young Scientists (MK-5498.2012.4). . - 6. - ISSN 1125-7865РУБ Plant Sciences + Forestry

Аннотация: While the forest-tundra zone in Siberia, Russia has been dendroclimatologically well-studied in recent decades, much less emphasis has been given to a wide belt of northern taiga larch forests located to the south. In this study, climate and local site conditions are explored to trace their influence on radial growth of Gmelin larch (Larix gmelinii (Rupr.) Rupr.) trees developed on permafrost soils in the northern taiga. Three dendrochronological sites characterized by great differences in thermo-hydrological regime of soils were established along a short (ca. 100 m long) transect: on a river bank (RB), at riparian zone of a stream (RZ) and on a terrace (TER). Comparative analysis of the rate and year-to-year dynamics of tree radial growth among sites revealed considerable difference in both raw and standardized tree-ring width (TRW) chronologies obtained for the RZ site, characterized by shallow soil active layer depth and saturated soils. Results of dendroclimatic analysis indicated that tree-ring growth at all the sites is mostly defined by climatic conditions of a previous year and precipitation has stronger effect on TRW chronologies in comparison to the air temperatures. Remarkably, a great difference in the climatic response of TRW chronologies has been obtained for trees growing within a very short distance from each other. The positive relation of tree-ring growth with precipitation, and negative to temperature was observed in the dry site RB. In contrary, precipitation negatively and temperature positively influenced tree radial growth of larch at the water saturated RZ. Thus, a complicate response of northern Siberian larch forest productivity to the possible climate changes is expected due to great mosaic of site conditions and variability of environmental factors controlling tree-ring growth at different sites. Our study demonstrates the new possibilities for the future dendroclimatic research in the region, as various climatic parameters can be reconstructed from tree-ring chronologies obtained for different sites. (c) 2013 Elsevier GmbH. All rights reserved.

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Держатели документа:
[Kirdyanov, Alexander V.
Prokushkin, Anatoly S.] SB RAS, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Tabakova, Maria A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Kirdyanov, A.V.; Prokushkin, A.S.; Tabakova, M.A.

/ A. V. Bogorodskaya [et al.] // Eurasian Soil Sci. - 2012. - Vol. 45, Is. 5. - P521-531, DOI 10.1134/S106422931205002X. - Cited References: 46 . - 11. - ISSN 1064-2293РУБ Soil Science

Аннотация: The quantitative and functional responses of soil microbial cenoses in the forest-tundra zone to pollution have been studied in the area exposed to emissions from the Norilsk Mining and Metallurgical Works. The strongest structural and functional disturbances of the soil biota have been recorded on the plots with completely destroyed vegetation. A decrease in the content of microbial carbon and an elevated respiration rate in the technogenically transformed soils provide evidence for the functioning of the microbial communities under stress caused by the continuous input of aggressive pollutants. The degree of transformation and the contents of technogenic elements (Ni, Cu, Co, Pb, and S) in the organic horizons of the forest-tundra soils are the major factors affecting the development and functioning of the soil microbial cenoses.

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[Bogorodskaya, A. V.
Ponomareva, T. V.
Shapchenkova, O. A.
Shishikin, A. S.] Russian Acad Sci, Sukachev Inst Forestry, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Bogorodskaya, A.V.; Ponomareva, T.V.; Shapchenkova, O.A.; Shishikin, A.S.

[Text] / D. . Pflugmacher [et al.] // Remote Sens. Environ. - 2011. - Vol. 115, Is. 12. - P3539-3553, DOI 10.1016/j.rse.2011.08.016. - Cited References: 65. - The research was supported by the Land Cover/Land-Use Change Program of the National Aeronautics and Space Administration (grant numbers NNGO6GF54G and NNX09AK88G) and in part by the Asia-Pacific Network for Global Change Research and the Alexander von Humboldt Foundation. We like to thank Dr. Curtis Woodcock for his advice in the early planning of this study, and Gretchen Bracher for preparing graphs. We are also thankful for the comments of two anonymous reviewers that helped to improve this manuscript. . - 15. - ISSN 0034-4257РУБ Environmental Sciences + Remote Sensing + Imaging Science & Photographic Technology

Аннотация: Information on land cover at global and continental scales is critical for addressing a range of ecological, socioeconomic and policy questions. Global land cover maps have evolved rapidly in the last decade, but efforts to evaluate map uncertainties have been limited, especially in remote areas like Northern Eurasia. Northern Eurasia comprises a particularly diverse region covering a wide range of climate zones and ecosystems: from arctic deserts, tundra, boreal forest, and wetlands, to semi-arid steppes and the deserts of Central Asia. In this study, we assessed four of the most recent global land cover datasets: GLC-2000, GLOBCOVER, and the MODIS Collection 4 and Collection 5 Land Cover Product using cross-comparison analyses and Landsat-based reference maps distributed throughout the region. A consistent comparison of these maps was challenging because of disparities in class definitions, thematic detail, and spatial resolution. We found that the choice of sampling unit significantly influenced accuracy estimates, which indicates that comparisons of reported global map accuracies might be misleading. To minimize classification ambiguities, we devised a generalized legend based on dominant life form types (LFT) (tree, shrub, and herbaceous vegetation, barren land and water). LFT served as a necessary common denominator in the analyzed map legends, but significantly decreased the thematic detail. We found significant differences in the spatial representation of LFT's between global maps with high spatial agreement (above 0.8) concentrated in the forest belt of Northern Eurasia and low agreement (below 0.5) concentrated in the northern taiga-tundra zone, and the southern dry lands. Total pixel-level agreement between global maps and six test sites was moderate to fair (overall agreement: 0.67-0.74, Kappa: 0.41-0.52) and increased by 0.09-0.45 when only homogenous land cover types were analyzed. Low map accuracies at our tundra test site confirmed regional disagreements and difficulties of current global maps in accurately mapping shrub and herbaceous vegetation types at the biome borders of Northern Eurasia. In comparison, tree dominated vegetation classes in the forest belt of the region were accurately mapped, but were slightly overestimated (10%-20%), in all maps. Low agreement of global maps in the northern and southern vegetation transition zones of Northern Eurasia is likely to have important implications for global change research, as those areas are vulnerable to both climate and socio-economic changes. (C) 2011 Elsevier Inc. All rights reserved.

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[Pflugmacher, Dirk
Krankina, Olga N.
Kennedy, Robert E.
Nelson, Peder] Oregon State Univ, Dept Forest Ecosyst & Soc, Corvallis, OR 97331 USA
[Cohen, Warren B.] US Forest Serv, USDA, Pacific NW Res Stn, Forestry Sci Lab, Corvallis, OR 97331 USA
[Friedl, Mark A.
Sulla-Menashe, Damien] Boston Univ, Dept Geog & Environm, Boston, MA 02215 USA
[Loboda, Tatiana V.] Univ Maryland, Dept Geog, College Pk, MD 20742 USA
[Kuemmerle, Tobias] Potsdam Inst Climate Impact Res PIK, D-14412 Potsdam, Germany
[Dyukarev, Egor] Inst Monitoring Climat & Ecol Syst, Tomsk 634021, Russia
[Elsakov, Vladimir] Russian Acad Sci, Komi Sci Ctr, Inst Biol, Syktyvkar 167610, Russia
[Kharuk, Viacheslav I.] VN Sukachev Inst Forest, Krasnoyarsk, Russia

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Pflugmacher, D...; Krankina, O.N.; Cohen, W.B.; Friedl, M.A.; Sulla-Menashe, D...; Kennedy, R.E.; Nelson, P...; Loboda, T.V.; Kuemmerle, T...; Dyukarev, E...; Elsakov, V...; Kharuk, V.I.

[Text] / M. I. Makarov [et al.] // Eurasian Soil Sci. - 2011. - Vol. 44, Is. 12. - P1381-1388, DOI 10.1134/S1064229311100097. - Cited References: 42. - This work was supported by the Russian Foundation for Basic Research (project nos. 08-04-92890 and 10-04-00780). . - 8. - ISSN 1064-2293РУБ Soil Science

Аннотация: The symbiotic fixation of atmospheric nitrogen by leguminous plants in the alpine community of a lichen heath at the Teberda State Biosphere Reserve is well adapted to low soil temperature characteristic for the altitude of 2800 m a.s.l. For the determination of the N fixation by isotopic methods (the method of the natural (15)N abundance and the method of isotopic (15)N dilution), Trifolium polyphyllum was taken as the control plant. This plant was used as it does not form symbiosis with the nitrogen-fixing bacteria in the highlands of the Northern Caucasus Region. The contribution of the N fixation to the N nutrition of different leguminous plant species as determined by the natural (15)N abundance method amounted to 28-73% at delta(15)N(0) = 0aEuro degrees and 46-117% at delta(15)N(0) = -1aEuro degrees; for the determination of the N fixation by the method of the isotopic label's dilution, it was 34-97%. The best correlation of the results obtained by these two isotopic methods was observed for the natural fractionation of the N isotopes in the course of the N fixation in the range of -0.5 to -0.7aEuro degrees. The determination of the nitrogenase activity of the roots by the acetylene method confirmed the absence of N fixation in T. polyphyllum and its different contribution to the N nutrition of different species of leguminous plants.

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Держатели документа:
[Makarov, M. I.
Malysheva, T. I.
Ermak, A. A.
Stepanov, A. L.] Lomonosov Moscow State Univ, Fac Soil Sci, Moscow 119991, Russia
[Onipchenko, V. G.] Lomonosov Moscow State Univ, Fac Biol, Moscow 119991, Russia
[Menyailo, O. V.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forestry, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Makarov, M.I.; Malysheva, T.I.; Ermak, A.A.; Onipchenko, V.G.; Stepanov, A.L.; Menyailo, O.V.

[Text] / A. S. Prokushkin [et al.] // Environ. Res. Lett. - 2011. - Vol. 6, Is. 4. - Ст. 45212, DOI 10.1088/1748-9326/6/4/045212. - Cited References: 63. - This work was supported by the joint US-Russia program between the RFBR and CRDF through grants 10-05-92513 and RUG1-2980-KR-10. Additional support was provided by joint Russian-French Programmes EC2CO, Environement Cotier PNEC and GDRI CAR-WET-SIB, ANR 'Arctic metals' and grant 11.G34.31.0014 of Russian Ministry of higher education and science. We greatly thank Sergey Tenishev for assistance with sample collection during harsh winter and spring periods, and Vladimir Ivanov who provided invaluable daily discharge data for the Nizhnyaya Tunguska and Tembenchi Rivers. We thank three anonymous reviewers for their fruitful and constructive comments that allowed improving greatly the quality of presentation. . - 14. - ISSN 1748-9326РУБ Environmental Sciences + Meteorology & Atmospheric Sciences

Аннотация: Frequent measurements of dissolved organic (DOC) and inorganic (DIC) carbon concentrations in rivers during snowmelt, the entire ice-free season, and winter were made in five large watersheds (15 000-174 000 km(2)) of the Central Siberian Plateau (Yenisey River basin). These differ in the degree of continuous permafrost coverage, mean annual air temperature, and the proportion of tundra and forest vegetation. With an annual DOC export from the catchment areas of 2.8-4.7 gC m(-2) as compared to an annual DIC export of 1.0-2.8 gC m(-2), DOC was the dominant component of terrigenous C released to rivers. There was strong temporal variation in the discharge of DOC and DIC. Like for other rivers of the pan-arctic and boreal zones, snowmelt dominated annual fluxes, being 55-71% for water runoff, 64-82% for DOC and 37-41% for DIC. Likewise, DOC and DIC exhibited also a strong spatial variation in C fluxes, with both dissolved C species decreasing from south to north. The rivers of the southern part of the plateau had the largest flow-weighted DOC concentrations among those previously reported for Siberian rivers, but the smallest flow-weighted DIC concentrations. In the study area, DOC and DIC fluxes were negatively correlated with the distribution of continuous permafrost and positively correlated with mean annual air temperature. A synthesis of literature data shows similar trends from west to east, with an eastward decrease of dissolved C concentrations and an increased proportion of DOC in the total dissolved C flux. It appears that there are two contemporary limitations for river export of terrigenous C across Siberia: (1) low productivity of ecosystems with respect to potentially mobilizable organic C, slow weathering rates with concomitant small formation of bicarbonate, and/or wildfire disturbance limit the pools of organic and inorganic C that can be mobilized for transport in rivers (source-limited), and (2) mobilization of available pools of C is constrained by low precipitation in the severe continental climate of interior Siberia (transport-limited). Climate warming may reduce the source limitation by enhancing primary production and weathering rates, while causes leading to surmounting the transport limitation remain debatable due to uncertainties in predictions of precipitation trends and other likely sources of reported increase of river discharges.

WOS,
Scopus

Держатели документа:
[Prokushkin, A. S.
Korets, M. A.
Prokushkin, S. G.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia
[Pokrovsky, O. S.
Shirokova, L. S.
Viers, J.] Univ Toulouse 3, CNRS, IRD, LMTG OMP, F-31400 Toulouse, France
[Amon, R. M. W.] Texas A&M Univ, Dept Marine Sci, Galveston, TX 77553 USA
[Guggenberger, G.] Leibniz Univ Hannover, Inst Bodenkunde, D-30419 Hannover, Germany
[McDowell, W. H.] Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA

Доп.точки доступа:
Prokushkin, A.S.; Pokrovsky, O.S.; Shirokova, L.S.; Korets, M.A.; Viers, J...; Prokushkin, S.G.; Amon, RMW; Guggenberger, G...; McDowell, W.H.