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

: материалы временных коллективов / I. A. Goncharova // 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. 29-30

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

Доп.точки доступа:
Гончарова, Ирина Александровна

: материалы временных коллективов / I. A. Goncharova // Climate change and their impact on boreal and temperate forests: Abstracts of the International Conference (June 5-7, 2006, Ekaterinburg, Russia). - 2006. - С. 29

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

Доп.точки доступа:
Гончарова, Ирина Александровна
Имеются экземпляры в отделах:
РСФ (30.01.2008г. (1 экз.) - Б.ц.) - свободны 1

: сборник научных трудов / F. Z. Glebov, M. D. Korzukhin // A systems analysis of the global boreal forest. - Cambridge : Cambridge University Press, 1992. - С. 241-266
Аннотация: We have described the major ecological mechanisms involved in the long-term process of bogging and peat formation, and the corresponding changes in the plant communities, for wetlands in the taiga zone of the West Siberian Plain. The discussion is developed at three spatiotemporal levels.

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

Доп.точки доступа:
Korzukhin, M.D.; Корзухин М.Д.; Глебов, Феликс Зиновьевич

[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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Держатели документа:
[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

Доп.точки доступа:
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] / D. . Sulla-Menashe [et al.] // Remote Sens. Environ. - 2011. - Vol. 115, Is. 2. - P392-403, DOI 10.1016/j.rse.2010.09.010. - Cited References: 71. - The research was supported by NASA grant numbers NNG06GF54G and NNX08AE61A. An additional thanks goes to Dr. Bin Tan who was instrumental in implementing the MODIS classification algorithms, and to the rest of the NELDA team for helpful input and discussions. . - 12. - ISSN 0034-4257РУБ Environmental Sciences + Remote Sensing + Imaging Science & Photographic Technology

Аннотация: The Northern Eurasian land mass encompasses a diverse array of land cover types including tundra, boreal forest, wetlands, semi-arid steppe, and agricultural land use. Despite the well-established importance of Northern Eurasia in the global carbon and climate system, the distribution and properties of land cover in this region are not well characterized. To address this knowledge and data gap, a hierarchical mapping approach was developed that encompasses the study area for the Northern Eurasia Earth System Partnership Initiative (NEESPI). The Northern Eurasia Land Cover (NELC) database developed in this study follows the FAO-land Cover Classification System and provides nested groupings of land cover characteristics, with separate layers for land use, wetlands, and tundra. The database implementation is substantially different from other large-scale land cover datasets that provide maps based on a single set of discrete classes. By providing a database consisting of nested maps and complementary layers, the NELC database provides a flexible framework that allows users to tailor maps to suit their needs. The methods used to create the database combine empirically derived climate-vegetation relationships with results from supervised classifications based on Moderate Resolution Imaging Spectroradiometer (MODIS) data. The hierarchical approach provides an effective framework for integrating climate-vegetation relationships with remote sensing-based classifications, and also allows sources of error to be characterized and attributed to specific levels in the hierarchy. The cross-validated accuracy was 73% for the land cover map and 73% and 91% for the agriculture and wetland classifications, respectively. These results support the use of hierarchical classification and climate-vegetation relationships for mapping land cover at continental scales. (C) 2010 Elsevier Inc. All rights reserved.

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Держатели документа:
[Sulla-Menashe, Damien
Friedl, Mark A.
Woodcock, Curtis E.
Sibley, Adam] Boston Univ, Dept Geog & Environm, Boston, MA 02215 USA
[Krankina, Olga N.] Oregon State Univ, Coll Forestry, Dept Forest Sci, Corvallis, OR 97331 USA
[Baccini, Alessandro] Woods Hole Res Ctr, Falmouth, MA 02540 USA
[Sun, Guoqing] NASA, GSFC, Biospher Sci Branch, Greenbelt, MD 20770 USA
[Kharuk, Viacheslav] Acad Gorodok Krasnoyarsk, Sukachev Forest Inst, Forest Ecol & Monitoring Branch, Krasnoyarsk 660036, Russia
[Elsakov, Vladimir] Russian Acad Sci, Inst Biol, Komi Sci Ctr, Syktyvkar 167610, Russia

Доп.точки доступа:
Sulla-Menashe, D...; Friedl, M.A.; Krankina, O.N.; Baccini, A...; Woodcock, C.E.; Sibley, A...; Sun, G.Q.; Kharuk, V...; Elsakov, V...

[Text] / C. . Blodau [et al.] // J. Geophys. Res.-Biogeosci. - 2008. - Vol. 113, Is. G3. - Ст. G03023, DOI 10.1029/2007JG000652. - Cited References: 45. - The support of the Deutsche Forschungsgemeinschaft (DFG) and of the German Ministry of Science and Education (BMBF) to H. Flessa, G. Guggenberger, and C. Blodau is gratefully acknowledged. We thank Martina Heider for laboratory assistance, Pjotr Karas and Alexander Tiunov for all their help with field work, and Swetlana Poljuhova (Field Station Igarka of the Permafrost Institute Yakutsk) for excellent laboratory analyses and help with respect to logistics. . - 8. - ISSN 0148-0227РУБ Environmental Sciences + Geosciences, Multidisciplinary

Аннотация: Thermokarst wetlands and ponds in the subarctic, which are located in land surface depressions resulting from permafrost melt, are strong sources of CH4, but little is known about respiration processes supporting these emissions. We determined CH4 fluxes and concentration profiles of dissolved gases and anions and some delta C-13 ratios of CO2 and CH4 in a thermokarst pond and adjacent smaller thermokarst depressions in the forest tundra near Igarka, northern Siberia in August 2006. Methane was emitted at 110-170 mg m(-2) d(-1) and produced mostly by CO2 reduction, which also provided high Gibbs free energies on the order of 50-70 KJ mol(-1) H-2 due to high H-2 concentrations. The diffusive flux calculated from CH4 gradients in the floating mat contributed 2% to emissions. CH4 was apparently not oxidized deeper than 20 cm into the floating mat and the water body below. Anaerobic respiration required to reproduce nonsteady state CO2 concentration maxima in the floating mat above the water body was 30-80 nmol cm(-3) d(-1) or 250 mg m(-2) d(-1) and thus on a similar order of magnitude as CH4 fluxes. The results suggest that floating mat-covered thermokarst ponds located in northern Siberian bogs effectively convert recently fixed carbon into CH4 and thus allow for emissions independently from the finite, bog-derived carbon source. The relative contribution of recently fixed and old bog-derived carbon to C fluxes requires further investigation, however.

Держатели документа:
[Blodau, Christian
Rees, Rainer
Knorr, Klaus-Holger] Univ Bayreuth, Limnol Res Stn, D-95440 Bayreuth, Germany
[Blodau, Christian
Rees, Rainer
Knorr, Klaus-Holger] Univ Bayreuth, Dept Hydrol, D-95440 Bayreuth, Germany
[Flessa, Heiner] Univ Gottingen, Buesgeninst, D-37077 Gottingen, Germany
[Rodionov, Andrej
Guggenberger, Georg] Univ Halle Wittenberg, Inst Agr & Nutr Sci, D-06108 Halle, Germany
[Shibistova, Olga
Zrazhevskaya, Galina
Mikheeva, Natalia] SB RAS, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Kasansky, Oleg A.] SB RAS, Permafrost Inst Yakutsk, Field Stn Igarka, Igarka 663200, Russia

Доп.точки доступа:
Blodau, C...; Rees, R...; Flessa, H...; Rodionov, A...; Guggenberger, G...; Knorr, K.H.; Shibistova, O...; Zrazhevskaya, G...; Mikheeva, N...; Kasansky, O.A.

[Text] / E. D. Schulze [et al.] // Tellus Ser. B-Chem. Phys. Meteorol. - 2002. - Vol. 54, Is. 5. - P421-428, DOI 10.1034/j.1600-0889.2002.01342.x. - Cited References: 27 . - 8. - ISSN 0280-6509РУБ Meteorology & Atmospheric Sciences

Аннотация: An introduction is given to the geography of Russian forests and to the specific conditions of the study sites located along the 60degrees latitude east of Moscow (Fyedorovskoe) near the Ural Mountains (Syktivkar) and in Central Siberia near the Yennisei river (Zotino). The climatic conditions were similar at all three sites. The main ecological parameter that changes between European Russia and Siberia is the length of the growing season (230 d above 0 degreesC NE Moscow to 170 d above 0 degreesC in Central Siberia) and to a lesser extent precipitation (580 mm NE Moscow to 530 mm in Central Siberia). The experimental sites were generally similar to the regional conditions,. although the Tver region has less forest and more grassland than the central forest reserve, and the Komi region has slightly less wetland than the study area. The Krasnoyarsk region reaches from the arctic ocean to and central Asia and contains a significant proportion of non-forest land. The boreal forest of west and east Yennisei differs mainly with respect to wetlands, which cover almost half of the land area on the west bank. All sites are prone to disturbance. Heavy winds and drought or surplus water are the main disturbance factors in European Russia (a 15-20 yr cycle), and fire is the dominating disturbance factor in Siberia (220-375 yr for stand replacing fires).

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Max Planck Inst Biogeochem, D-07701 Jena, Germany
RAS, Severtsov Inst Ecol & Evolut, Moscow 1107071, Russia
Siberian RAS, Inst Forest, Krasnoyarsk 660036, Russia
Univ Tuscia, Dept Forest Scil & Environm, I-01100 Viterbo, Italy

Доп.точки доступа:
Schulze, E.D.; Vygodskaya, N.N.; Tchebakova, N.M.; Czimczik, C.I.; Kozlov, D.N.; Lloyd, J...; Mollicone, D...; Parfenova, E...; Sidorov, K.N.; Varlagin, A.V.; Wirth, C...

[Text] / W. . Eugster [et al.] // Glob. Change Biol. - 2000. - Vol. 6. - P84-115, DOI 10.1046/j.1365-2486.2000.06015.x. - Cited References: 132 . - 32. - ISSN 1354-1013РУБ Biodiversity Conservation + Ecology + Environmental Sciences

Аннотация: This paper summarizes and analyses available data on the surface energy balance of Arctic tundra and boreal forest. The complex interactions between ecosystems and their surface energy balance are also examined, including climatically induced shifts in ecosystem type that might amplify or reduce the effects of potential climatic change. High latitudes are characterized by large annual changes in solar input. Albedo decreases strongly from winter, when the surface is snow-covered, to summer, especially in nonforested regions such as Arctic tundra and boreal wetlands. Evapotranspiration (Q(E)) of high-latitude ecosystems is less than from a freely evaporating surface and decreases late in the season, when soil moisture declines, indicating stomatal control over Q(E), particularly in evergreen forests. Evergreen conifer forests have a canopy conductance half that of deciduous forests and consequently lower Q(E) and higher sensible heat flux (Q(H)), There is a broad overlap in energy partitioning between Arctic and boreal ecosystems, although Arctic ecosystems and light taiga generally have higher ground heat flux because there is less leaf and stem area to shade the ground surface, and the thermal gradient from the surface to permafrost is steeper. Permafrost creates a strong heat sink in summer that reduces surface temperature and therefore heat flux to the atmosphere. Loss of permafrost would therefore amplify climatic warming. If warming caused an increase in productivity and leaf area, or fire caused a shift from evergreen to deciduous forest, this would increase Q(E) and reduce Q(H). Potential future shifts in vegetation would have varying climate feedbacks, with largest effects caused by shifts from boreal conifer to shrubland or deciduous forest (or vice versa) and from Arctic coastal to wet tundra. An increase of logging activity in the boreal forests appears to reduce Q(E) by roughly 50% with little change in Q(H), while the ground heat flux is strongly enhanced.

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Держатели документа:
Univ Bern, Inst Geog, CH-3012 Bern, Switzerland
McMaster Univ, Sch Geog & Geol, Hamilton, ON L8S 4K1, Canada
Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA
Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA
NOAA, ERL, ATDD, Oak Ridge, TN 37831 USA
Natl Ctr Atmospher Res, Boulder, CO 80307 USA
Univ Alaska, Inst Arctic Biol, Fairbanks, AK 99775 USA
Russian Acad Sci, Inst Forestry, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Eugster, W...; Rouse, W.R.; Pielke, R.A.; McFadden, J.P.; Baldocchi, D.D.; Kittel, TGF; Chapin, F.S.; Liston, G.E.; Vidale, P.L.; Vaganov, E...; Chambers, S...

/ C. Blodau [et al.] // Journal of Geophysical Research G: Biogeosciences. - 2008. - Vol. 113, Is. 3. - Ст. G03023, DOI 10.1029/2007JG000652 . - ISSN 0148-0227
Аннотация: Thermokarst wetlands and ponds in the subarctic, which are located in land surface depressions resulting from permafrost melt, are strong sources of CH4, but little is known about respiration processes supporting these emissions. We determined CH4 fluxes and concentration profiles of dissolved gases and anions and some ?13C ratios of CO 2 and CH4 in a thermokarst pond and adjacent smaller thermokarst depressions in the forest tundra near Igarka, northern Siberia in August 2006. Methane was emitted at 110-170 mg m-2 d-1 and produced mostly by CO2 reduction, which also provided high Gibbs free energies on the order of 50-70 KJ mol-1 H2 due to high H2concentrations. The diffusive flux calculated from CH 4 gradients in the floating mat contributed <2% to emissions. CH4 was apparently not oxidized deeper than 20 cm into the floating mat and the water body below. Anaerobic respiration required to reproduce nonsteady state CO2 concentration maxima in the floating mat above the water body was 30-80 nmol cm-3 d-1 or 250 mg m -2 d-1 and thus on a similar order of magnitude as CH 4 fluxes. The results suggest that floating mat-covered thermokarst ponds located in northern Siberian bogs effectively convert recently fixed carbon into CH4 and thus allow for emissions independently from the finite, bog-derived carbon source. The relative contribution of recently fixed and old bog-derived carbon to C fluxes requires further investigation, however. Copyright 2008 by the American Geophysical Union.

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Держатели документа:
Limnological Research Station, Department of Hydrology, University of Bayreuth, 95440 Bayreuth, Germany
Soil Science of Temperate and Boreal Ecosystems, Buesgeninstitute, University of Gottingen, Busgenweg 2, 37077 Gottingen, Germany
Soil Sciences, Institute of Agricultural and Nutritional Sciences, Martin Luther University HalleWittenberg, Weidenplan 14, 06108 Halle, Germany
Field Station Igarka of the Permafrost Institute Yakutsk, SB-RAS, 1st Microrayon 8a, 663200 Igarka, Russian Federation
VN Sukachev Institute of Forest, SB-RAS, Akademgorodok, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Blodau, C.; Rees, R.; Flessa, H.; Rodionov, A.; Guggenberger, G.; Knorr, K.-H.; Shibistova, O.; Zrazhevskaya, G.; Mikheeva, N.; Kasansky, O.A.

/ V. D. Konstantinov, S. M. Gorozhankina // Mapping Sciences and Remote Sensing. - 1997. - Vol. 34, Is. 1. - P40-50 . - ISSN 0749-3878
Аннотация: Two specialists on the forest and wetland ecosystems of Siberia describe principles and measures employed in the establishment of a regular program of ecological mapping at Russia's Central Siberian Biosphere Preserve, as well as efforts to standardize remote-sensing-based monitoring efforts through improved procedures for selection of reference plots for ground truth determination. Issues addressed include the identification of principal ecological factors serving as landscape classification criteria, the need for better methods of interpreting an entire range of forest-wetland communities on remote sensing imagery, innovations in data gathering procedures in the field, selection of natural models [representative tracts] for monitoring in view of the technical infeasibility of monitoring the entire preserve, and selection of reference plots within each model for ground truth.

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Forestry Institute, Siberian Section, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Konstantinov, V.D.; Gorozhankina, S.M.

[Text] / Y. L. Liu [et al.] // Clim. Change. - 2014. - Vol. 126, Is. 03.04.2014. - P413-427, DOI 10.1007/s10584-014-1234-9. - Cited References: 53. - This research is supported by the NASA Land Use and Land Cover Change program (NASA-NNX09AI26G, NN-H-04-Z-YS-005-N, and NNX09AM55G), the Department of Energy (DE-FG02-08ER64599), the National Science Foundation (NSF-1028291 and NSF- 0919331), the NSF Carbon and Water in the Earth Program (NSF-0630319), and the Dynamics of Coupled Natural and Human Systems (CNH) Program of the NSF (#1313761). We also acknowledge the Global Runoff Data Centre for provision of the gauge station data. Runoff data in Peterson et al. (2002) were obtained from the R-ArcticNet database. A special acknowledgment is made here to Prof. Eric Wood for his generous provision of the ET datasets of Vinukollu et al. (2011), and to Dr. Brigitte Mueller and Dr. Martin Hirsci for the provision of the LandFlux-EVAL dataset of Mueller et al. (2013). Diego Miralles acknowledges the support by the European Space Agency WACMOS-ET project (4000106711/12/I-NB). . - ISSN 0165-0009. - ISSN 1573-1480РУБ Environmental Sciences + Meteorology & Atmospheric Sciences

Аннотация: Northern Eurasian ecosystems play an important role in the global climate system. Northern Eurasia (NE) has experienced dramatic climate changes during the last half of the 20th century and to present. To date, how evapotranspiration (ET) and water availability (P-ET, P: precipitation) had changed in response to the climatic change in this region has not been well evaluated. This study uses an improved version of the Terrestrial Ecosystem Model (TEM) that explicitly considers ET from uplands, wetlands, water bodies and snow cover to examine temporal and spatial variations in ET, water availability and river discharge in NE for the period 1948-2009. The average ET over NE increased during the study period at a rate of 0.13 mm year(-1) year(-1). Over this time, water availability augmented in the western part of the region, but decreased in the eastern part. The consideration of snow sublimation substantially improved the ET estimates and highlighted the importance of snow in the hydrometeorology of NE. We also find that the modified TEM estimates of water availability in NE watersheds are in good agreement with corresponding measurements of historical river discharge before 1970. However, a systematic underestimation of river discharge occurs after 1970 indicates that other water sources or dynamics not considered by the model (e.g., melting glaciers, permafrost thawing and fires) may also be important for the hydrology of the region.

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Держатели документа:
[Liu, Yaling
Zhuang, Qianlai
He, Yujie] Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA
[Zhuang, Qianlai] Purdue Univ, Dept Agron, W Lafayette, IN 47907 USA
[Pan, Zhihua] China Agr Univ, Coll Resources & Environm Sci, Beijing 100094, Peoples R China
[Miralles, Diego] Univ Ghent, Lab Hydrol & Water Management, B-9000 Ghent, Belgium
[Miralles, Diego] Univ Bristol, Sch Geog Sci, Bristol, Avon, England
[Tchebakova, Nadja] Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk, Russia
[Kicklighter, David
Melillo, Jerry] Marine Biol Lab, Ctr Ecosyst, Woods Hole, MA 02543 USA
[Chen, Jiquan] Michigan State Univ, CGCEO Geog, E Lansing, MI 48824 USA
[Sirin, Andrey] Acad Sci, Lab Peatland Forestry & Ameliorat, Inst Forest Sci, Uspenskoye, Moscow Oblast, Russia
[Zhou, Guangsheng] Chinese Acad Sci, Inst Bot, Beijing, Peoples R China
ИЛ СО РАН

Доп.точки доступа:
Liu, Y.L.; Zhuang, Q.L.; Pan, Z.H.; Miralles, D...; Tchebakova, N...; Kicklighter, D...; Chen, J.Q.; Sirin, A...; He, Y.J.; Zhou, G.S.; Melillo, J...; NASA Land Use and Land Cover Change program [NASA-NNX09AI26G, NN-H-04-Z-YS-005-N, NNX09AM55G]; Department of Energy [DE-FG02-08ER64599]; National Science Foundation [NSF-1028291, NSF- 0919331]; NSF Carbon and Water in the Earth Program [NSF-0630319]; Dynamics of Coupled Natural and Human Systems (CNH) Program of the NSF [1313761]; European Space Agency WACMOS-ET project [4000106711/12/I-NB]

/ C. Knoblauch [et al.] // J. Geophys. Res. G Biogeosci. - 2015. - Vol. 120, Is. 12. - P2525-2541, DOI 10.1002/2015JG003053 . - ISSN 2169-8953
Аннотация: Methane (CH4) production, oxidation, and emission were studied in ponds of the permafrost-affected polygonal tundra in northeast Siberia. Microbial degradation of organic matter in water-saturated soils is the most important source for the climate-relevant trace gas CH4. Although ponds and lakes cover a substantial fraction of the land surface of northern Siberia, data on CH4 fluxes from these water bodies are scarce. Summer CH4 fluxes were measured with closed chambers at the margins of ponds vegetated by vascular plants and in their centers without vascular plants. Furthermore, CH4 and oxygen concentration gradients, stable carbon isotope signatures of dissolved and emitted CH4, and microbial CH4 production and CH4 oxidation were determined. Mean summer fluxes were significantly higher at the margins of the ponds (46.1 ± 15.4 mg CH4 m-2 d-1) than at the centers (5.9 ± 8.2 mg CH4 m-2 d-1). CH4 transport was dominated by diffusion in most open water sites, but substantial ebullitive fluxes (12.0 ± 8.1 mg CH4 m-2 d-1) were detected in one pond. Plant-mediated transport accounted for 70 to 90% of total CH4 fluxes above emerged vegetation. In the absence of vascular plants, 61 to 99% of the CH4 produced in the anoxic bottom soil was consumed in a layer of the submerged moss Scorpidium scorpioides, which covered the bottoms of the ponds. The fraction of CH4 oxidized was lower at sites with vascular plants since CH4 was predominantly transported through their aerenchyma, thereby bypassing the CH4 oxidation zone in the moss layer. These results emphasize the importance of moss-associated CH4 oxidation causing low CH4 fluxes from the studied Siberian ponds. © 2015. American Geophysical Union. All Rights Reserved.

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Держатели документа:
Institute of Soil Science, Center for Earth System Research and Sustainability, Universitat Hamburg, Hamburg, Germany
Institute of Geography, Faculty of Physics and Earth Science, Leipzig University, Leipzig, Germany
Sukachev Institute of Forest, Siberian Branch of the Russian Academy of Science, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Knoblauch, C.; Spott, O.; Evgrafova, S.; Kutzbach, L.; Pfeiffer, E. -M.

/ S. Evgrafova [et al.] // WATER RESOURCES, FOREST, MARINE AND OCEAN ECOSYSTEMS CONFERENCE : STEF92 TECHNOLOGY LTD, 2016. - 16th International Multidisciplinary Scientific Geoconference (SGEM (JUN 30-JUL 06, 2016, Albena, BULGARIA). - P199-204. - (International Multidisciplinary Scientific GeoConference-SGEM). - Cited References:15 . - РУБ Ecology + Oceanography + Soil Science + Water Resources

Аннотация: We investigated isotopic signature of methane efflux from soil surface of Siberian arctic and sub-arctic ecosystems in sites in Siberia. In the boreal ecosystem of the Tura site (64 degrees 15'N, 100 13'E) the delta C-13 signature of methane (-43%o for south facing slope and -35%o from north facing slope) showed low methane production potential of investigated soils. Two years of monitoring of the delta C-13(CH4) signatures from surface of ice-wedge polygon of Samoylov island (72 degrees 22'N, 126 degrees 28'E) showed that the delta C-13 signature were different regarding to temperature and precipitation. The mean of delta C-13(CH4) emitted from the polygon wall ranged from 72.5 +/- 1.9%. to-47.3 +/- 1.5%. The same for polygon center ranged from-67.1 +/- 2.0% to-62.4 +/- 1.7%. Almost no difference between delta C-13(CH4) signature of years observed could mean that conditions for methane production are possibly quite stable. With respect to methane emission both permafrost ecosystems are thus very contrasting.

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Держатели документа:
RAS, VN Sukachev Inst Forest, SB, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Leibniz Univ Hannover, Inst Soil Sci, Hannover, Germany.

Доп.точки доступа:
Evgrafova, Svetlana; Novikov, Oleg; Alexandrov, Dmitry; Guggenberger, Georg

/ T. T. Efremova [и др.] // Vestn. Tomsk. Gos. Univ. Biol. - 2018. - Is. 41. - С. 135-155, DOI 10.17223/19988591/41/8 . - ISSN 1998-8591
Аннотация: In the complex structure of the vertical altitudinal zonality of the Altai-Sayan mountain country, peat soils were almost not represented. The aim of this research was to develop a topographic series of peat soils of the Kuznetsk Alatau. The studied peatlands were confined to the basins of the Belyi Iyus and the Chernyi Iyus rivers and located at different hypsometric levels of the relief on the Eastern slope of the Kuznetsk Alatau, at 1543, 1087, 832, 622, 579 and 547m above sea level (See Fig. 1). As a criterion of vertical structural organization of soil, we used acid-base properties: water pH (water extract), salt pH (extract of 1M KCl) and general potential - nonexchangeable acidity (extract of 1M CH3COONa). The determined value of acidity was multiplied by an empirical coefficient 1.75. The sum of exchangeable cations (by Kappen-Hilkovits) was found in the extract of 0.1M HCl, in which the Ca2++Mg2+ was determined by complexometric titration. According to the difference between the sum of exchangeable cations and Ca2++Mg2+, we identified the content of other (unidentified) cations. The degree of soil saturation with bases, expressed in %, was calculated as the proportion of exchangeable bases in 0.1M HCl solution to the sum (exchangeable bases + nonexchangeable acidity). The V-diagrams, constructed on the basis of water pH, salt pH and saturation of soil absorbing complex (SAC) with exchangeable calcium and magnesium, describe the acidic trace of soil formation and simulate the acidification of top soil horizons in the course of peat genesis (See Fig. 2). High-precision regression model was proposed for the prediction of exchangeble acidity value (pHKCl) by the value of active acidity (pHH2O).Using the methods of multivariate statistical analysis (discriminant, multidimensional scaling), we grouped peat soils into three clusters with acid-base characteristics. The parameter of SAC saturation by alkaline-earth cations and pH salt value makes the dominant contribution to the organization of peat soil clusters with a final prediction 89% (See Table 3, Fig. 4). In the structure of vertical soil zones of the Altai-Sayan mountain country, particularly of the Eastern slopes of the Kuznetsk Alatau, the geochemical associations (clusters) of peat soils were identified: a) acidic and unsaturated by calcium and magnesium (<30-50%) on the whole profile within the boundaries of alpine tundra and subalpine complexes at the altitude of 1500-1100 m; b) slightly acidic and slightly saturated with bases (50-70%) within the mountaintaiga zone of dark coniferous forests 1100-800 m a.s.; c) neutral and moderately saturated with alkaline-earth base (70-90%) associations of peat soils within the zone of subtaiga-forest-steppe 800-500 m a.s. (See Table 4). Chorological organization of peat soils is in accordance with the hydrochemical zoning of underground waters and high-zone structure of the vegetation cover at automorphic sites. However, in the forest zone of wetlands of the Kuznetsk Alatau eastern slope, regardless of acid-base properties of peat soils, spruce forests mainly form, reflecting the main characteristics of soil hydromorphism. In this regard, the status of indigenous groups of swamp spruce forests can be considered as sufficient objective criteria of a regional climate change towards dryness. © 2018 Tomsk State University. All rights reserved.

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Держатели документа:
Laboratory of Phytocoenology and Forest Resource Studies, VN Sukachev Institute of Forest, Siberian Branch of the Russian Academy of Sciences, Federal Research Center, Krasnoyarsk Science Center SB RAS, Siberian Branch of the Russian Academy of Sciences, 50 Akademgorodok, bld. 28, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Efremova, T. T.; Efremov, S. P.; Melent'Eva, N. V.; Avrova, A. F.

/ A. S. Prokushkin [et al.] // IOP Conference Series: Earth and Environmental Science : Institute of Physics Publishing, 2019. - Vol. 232: 5th International Summer School for Students and Young Scientists on Natural and Human Environment of Arctic and Alpine Areas: Relief, Soils, Permafrost, Glaciers, Biota Life Style of Native Ethnic Groups in a Rapidly Changing Climate (7 July 2018 through 21 July 2018, ) Conference code: 145575, Is. 1, DOI 10.1088/1755-1315/232/1/012010 . -
Аннотация: The study is focused on carbon and nutrient behaviour in tributaries of the Yenisei River draining the Western Siberian Plain. The previous studies showed that dissolved organic carbon (DOC) concentrations in riverine systems are influenced by wetland cover within a watershed and modulating effect of permafrost. Our data point out more complex interactions within the south-north transect of the Yenisei River basin including a partitioning of sources at different seasons and in-river metabolic processing of DOC involving utilization of nutrients and production of DIC. On the other hand, DOC concentration in rivers is driven by available stock of labile carbon and, thus, is a function of total organic matter stored in soils. Terrigenic C and nutrient fluxes to rivers are enhanced in colder environments of northern Western Siberia, contradicting the earlier observations and respective future projections of permafrost degradation effects on riverine C release. © 2019 Published under licence by IOP Publishing Ltd.

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Держатели документа:
VN Sukachev Institute of Forest SB RAS, Akademgorodok 50/28, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodny 79, Krasnoyarsk, 660041, Russian Federation
N. Laverov Federal Center for Integrated Arctic Research, Russian Academy of Science, Arkhangelsk, Russian Federation
Tomsk State University, Tomsk, Russian Federation
Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, Toulouse, France

Доп.точки доступа:
Prokushkin, A. S.; Korets, M. A.; Panov, A. V.; Prokushkina, M. P.; Tokareva, I. V.; Vorobyev, S. N.; Pokrovsky, O. S.

[Текст] : статья / Тамара Тимофеевна Ефремова, Ада Федоровна Аврова // Сибирский экологический журнал. - 2019. - Т. 26, № 4. - С. 397-409, DOI 10.15372/SEJ20190403 . - ISSN 0869-8619
   Перевод заглавия: REGRESSION MODELS OF ACID-BASE PROPERTIES OF PEAT SWAMPS AS OPERATIONAL CRITERIA FOR THEIR CHEMICAL CLASSIFICATION

УДК

631*415

631*445.12

519*2

Аннотация: По типу линейной функции установлены количественные связи активной кислотности (рН_Н₂О) торфяных почв с величиной обменной (рН_KCl) и гидролитической (общей) кислотности, содержанием обменных катионов и щелочноземельных оснований, а также со степенью насыщенности основаниями. Приведены коэффициенты полученных уравнений регрессии. Доказаны высокие прогностические возможности регрессионных моделей на примере независимых данных. Применение регрессионных уравнений избавляет от выполнения трудоемких аналитических работ, что позволяет оперативно осуществлять классификацию болот и торфяных почв по химическому принципу - насыщенности щелочноземельными основаниями и величине рН. Индикаторная роль ботанического состава может заслуживать доверия при условии невысокой степени разложения торфа и специальных знаний морфологии и анатомии сфагновых мхов и сосудистых болотных растений.
The quantitative relationships of active acidity (pH_H₂O) of peat soils with the value of exchange acidity (pH_KCl), nonexchangeble (total potential) acidity (1M CH₃COONa extract), and the content of exchange cations and alkaline-earth bases, as well as the degree of bases saturation were established by the type of linear function. The coefficients of the regression equations are given. Using independent data, we proved the high predictive capability of regression models. Using the regression equations eliminates the time-consuming execution of analytical works, which allows to quickly classification the wetlands and peat soils on the chemical principle - saturation of alkaline-earth bases and pH value. The indicator role of the botanical composition may be credible provided the low peat decomposition degree and special knowledge of morphology and anatomy of sphagnum mosses and vascular bog plants.

РИНЦ,
SPRINGER

Держатели документа:
ИЛ СО РАН : 660036, Красноярск, Академгородок, 50, стр. 28

Доп.точки доступа:
Ефремова, Тамара Тимофеевна; Efremova T.T.; Аврова, Ада Федоровна; Avrova A.F.

/ T. T. Efremova, A. F. Avrova // Contemp. Probl. Ecol. - 2019. - Vol. 12, Is. 4. - P321-331, DOI 10.1134/S1995425519040024. - Cited References:20. - This study was performed in the framework of base project VI.52.2.1. "Biodiversity of Primary Coniferous and Secondary Forest Ecosystems" (no. 0356-2016-0301). . - ISSN 1995-4255. - ISSN 1995-4263РУБ Ecology

Аннотация: Quantitative relationships between the active acidity of peat soils on the one hand and their exchange acidity (pH(KCl)), nonexchangeble (total potential) acidity (1M CH3COONa extract), contents of exchange cations and alkaline-earth bases, and base saturation degree, on the other hand, have been identified in the form of a linear function. Coefficients of the resultant regression equations are provided. The high predictive capability of the produced regression models is proven using independent data as examples. The use of regression equations eliminates the need for time-consuming chemical analytical works, thus making it possible to operatively classify wetlands and peat soils on the basis on their chemical properties: saturation with alkaline-earth bases and pH value. The botanical composition may also be used as a reliable indicator, provided that the degree of peat decomposition is low and subject to special knowledge of morphology and anatomy of sphagnum mosses and vascular swamp plants.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, West Siberian Dept,Sukachev Inst Forest,Fed Res C, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Efremova, T. T.; Avrova, A. F.; [VI.52.2.1]; [0356-2016-0301]

/ S. K. Farber, N. S. Kazmik // Lesnoy Zh. - 2020. - Is. 4. - С. 53-67, DOI 10.37482/0536-1036-2020-4-53-67. - Cited References:37 . - ISSN 0536-1036РУБ Forestry

Аннотация: The visibility of the spatial distribution of soil moisture is achieved through mapping, which is most simply carried out according to a digital model. Information on soil moisture is stored in the attribute table field of the Geographic Information System (GIS) layer and available for editing and later use. It is shown that a digital moisture model can be obtained through the cross-spectrum analysis of soil moisture with terrain parameters (frame of mapping - a digital elevation model) and ranking of forest types in order of increasing soil moisture (frame of mapping - a feature layer of inventory plots). The mapping results are demonstrated in terms of 2 test sites in mountainous and flat areas. Soil moisture mapping based on the DEM (digital elevation model) data was performed for a test site located in the Axial Western Sayan district of the mountain taiga forests; where forest types, due to the spatial cross-spectrum analysis, are distributed by terrain parameters and ranked by soil moisture. The result of the spatial analysis of the DEM is a raster (digital elevation model of soil moisture). Soil moisture mapping based on the forest management materials is performed for the test area representing the southern taiga forests of the Angara region. Ranking of soil moisture is made on the basis of inventory plot descriptions of the test site. The data of inventory plots was excluded from the analysis. Growth of tree species is a priori impossible down there (wetlands, rivers and lakes). In a simplified form, a ranked range of soil moisture is also demonstrated relative to the forest type as a generalized qualitative indicator of forest site conditions. Regardless of the land category (plantation, burnt area or cutover), each inventory plot receives an additional quantitative indicator of soil moisture, followed by the possibility of determining the regression equations for the potential productivity of tree species. It is found that in the presence of a feature layer of forest management data, soil moisture mapping is preferable to be adapted from the forest management materials. It is shown that there is a dependence of the productivity of stands on soil moisture.

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Держатели документа:
RAS, Siberian Branch, Krasnoyarsk Sci Ctr, Div Fed Res Ctr,Sukachev Inst Forest, Akad Gorodok 50-28, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Farber, S. K.; Kazmik, N. S.

/ P. J. Haubrock, A. J. Turbelin, R. N. Cuthbert [et al.] // NeoBiota. - 2021. - Vol. 67. - P153-190, DOI 10.3897/neobiota.67.58196. - Cited References:100. - The authors acknowledge the French National Research Agency (ANR-14-CE02-0021) and the BNP-Paribas Foundation Climate Initiative for funding the InvaCost project that allowed the construction of the InvaCost database. The present work was conducted following a workshop funded by the AXA Research Fund Chair of Invasion Biology and is part of the AlienScenario project funded by BiodivERsA and Belmont-Forum call 2018 on biodiversity scenarios. AN acknowledges funding from EXPRO grant no. 19-28807X (Czech Science Foundation) and long-term research development project RVO 67985939 (The Czech Academy of Sciences). CC was supported by Portuguese National Funds through Fundacao para a Ciencia e a Tecnologia (CEECIND/02037/2017; UIDB/00295/2020 and UIDP/00295/2020). RNC was funded by a research fellowship from the Alexander von Humboldt Foundation. TWB acknowledges funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant no. 747120. MG and CD were funded by the BiodivERsA-Belmont Forum Project "Alien Scenarios" (BMBF/PT DLR 01LC1807C). NK was partially supported by the Russian Foundation for Basic Research (grant no.19-04-01029-A) [national literature survey] and the basic project of Sukachev Institute of Forest SB RAS (project no. 0287-2021-0011) [InvaCost database contribution]. DR thanks InEE-CNRS who supports the network GdR 3647 'Invasions Biologiques'. Funds for AJT, EA and LBM contracts come from the AXA Research Fund Chair of Invasion Biology of University Paris Saclay. BL, DR and FC are French agents (affiliated, respectively, to the Museum National d'Histoire Naturelle, University of Rennes and Centre National de la Recherche Scientifique); their salaries, for which they are grateful, are typically not accounted for in assessment of costs on biological invasions. At last, the authors want to express their thanks for the translation of the abstract to other European languages, namely to Paride Balzani, Antonin Kouba, Sandra Hodic, and ROS Educational Consultancy Ltd & Garnock Media Ltd. . - ISSN 1619-0033. - ISSN 1314-2488РУБ Biodiversity Conservation + Ecology

Аннотация: Biological invasions continue to threaten the stability of ecosystems and societies that are dependent on their services. Whilst the ecological impacts of invasive alien species (IAS) have been widely reported in recent decades, there remains a paucity of information concerning their economic impacts. Europe has strong trade and transport links with the rest of the world, facilitating hundreds of IAS incursions, and largely centralised decision-making frameworks. The present study is the first comprehensive and detailed effort that quantifies the costs of IAS collectively across European countries and examines temporal trends in these data. In addition, the distributions of costs across countries, socioeconomic sectors and taxonomic groups are examined, as are socio-economic correlates of management and damage costs. Total costs of IAS in Europe summed to US$140.20 billion (or euro116.61 billion) between 1960 and 2020, with the majority (60%) being damage-related and impacting multiple sectors. Costs were also geographically widespread but dominated by impacts in large western and central European countries, i.e. the UK, Spain, France, and Germany. Human population size, land area, GDP, and tourism were significant predictors of invasion costs, with management costs additionally predicted by numbers of introduced species, research effort and trade. Temporally, invasion costs have increased exponentially through time, with up to US$23.58 billion (euro19.64 billion) in 2013, and US$139.56 billion (euro116.24 billion) in impacts extrapolated in 2020. Importantly, although these costs are substantial, there remain knowledge gaps on several geographic and taxonomic scales, indicating that these costs are severely underestimated. We, thus, urge increased and improved cost reporting for economic impacts of IAS and coordinated international action to prevent further spread and mitigate impacts of IAS populations.

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Держатели документа:
Senckenberg Res Inst, D-63571 Gelnhausen, Germany.
Nat Hist Museum Frankfurt, Dept River Ecol & Conservat, D-63571 Gelnhausen, Germany.
Univ South Bohemia Ceske Budejovice, Fac Fisheries & Protect Waters, South Bohemian Res Ctr Aquaculture & Biodivers Hy, Zatisi 728-2, Vodnany 38925, Czech Republic.
Univ Paris Saclay, CNRS, AgroParisTech, Ecol Systemat Evolut, F-91405 Orsay, France.
Queens Univ Belfast, Sch Biol Sci, 19 Chlorine Gardens, Belfast BT9 5DL, Antrim, North Ireland.
GEOMAR Helmholtz Zentrum Ozeanforsch Kiel, D-24105 Kiel, Germany.
Czech Acad Sci, Inst Bot, Dept Invas Ecol, CZ-25243 Pruhonice, Czech Republic.
Tour du Valat, Res Inst Conservat Mediterranean Wetlands, F-13200 Arles, France.
Univ Aberdeen, Kings Coll, Sch Biol Sci, Aberdeen AB24 3FX, Scotland.
Univ Exeter, Environm & Sustainabil Inst, Penryn TR10 9FE, Cornwall, England.
Univ Lisbon, Ctr Geog Studies, Inst Geog & Spatial Planning, Edificio IGOT,Rua Branca Edmee Marques, P-1600276 Lisbon, Portugal.
Univ Vienna, Dept Bot & Biodivers Res, BioInvas Global Change Macroecol Grp, Rennweg 14, A-1030 Vienna, Austria.
UFZ Helmholtz Ctr Environm Res, Dept Community & Ecol, D-06120 Halle, Saale, Germany.
Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Fed Res Ctr,Krasnoyarsk Sci Ctr SB RAS, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Woods Hole Oceanog Inst, Marine Policy Ctr, Woods Hole, MA 02543 USA.
Univ Southern Denmark, Dept Sociol Environm & Business Econ, DK-6700 Esbjerg, Denmark.
Sorbonne Univ, Univ Caen Normandie, Univ Antilles,Museum Natl Hist Nat,CNRS,IRD, Unite Biol Organismes & Ecosyst Aquat BOREA UMR 7, Paris, France.
Univ Rennes 1, UMR CNRS 6553, EcoBio, Rennes, France.
Inst Univ France, 1 Rue Descartes, Paris, France.
Aalto Univ, Water & Dev Res Grp, Espoo, Finland.
Univ Helsinki, Fac Agr & Forestry, Dept Forest Sci, POB 27, Helsinki 00014, Finland.

Доп.точки доступа:
Haubrock, Phillip J.; Turbelin, Anna J.; Cuthbert, Ross N.; Novoa, Ana; Taylor, Nigel G.; Angulo, Elena; Ballesteros-Mejia, Liliana; Bodey, Thomas W.; Capinha, Cesar; Diagne, Christophe; Essl, Franz; Golivets, Marina; Kirichenko, Natalia; Kourantidou, Melina; Leroy, Boris; Renault, David; Verbrugge, Laura; Courchamp, Franck; Haubrock, Phillip Joschka; French National Research AgencyFrench National Research Agency (ANR) [ANR-14-CE02-0021]; BNP-Paribas Foundation Climate Initiative; AXA Research Fund Chair of Invasion Biology; BiodivERsA; EXPRO (Czech Science Foundation) [19-28807X]; Czech Academy of SciencesCzech Academy of Sciences [RVO 67985939]; Portuguese National Funds through Fundacao para a Ciencia e a Tecnologia [CEECIND/02037/2017, UIDB/00295/2020, UIDP/00295/2020]; Alexander von Humboldt FoundationAlexander von Humboldt Foundation; European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [747120]; BiodivERsA-Belmont Forum Project "Alien Scenarios" [BMBF/PT DLR 01LC1807C]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-04-01029-A]; Sukachev Institute of Forest SB RAS [0287-2021-0011]; AXA Research Fund Chair of Invasion Biology of University Paris Saclay; Belmont-Forum call 2018 on biodiversity scenarios

/ S.-B. Park, A. Knohl, M. Migliavacca [et al.] // Atmosphere. - 2021. - Vol. 12, Is. 8. - Ст. 984, DOI 10.3390/atmos12080984 . - ISSN 2073-4433
Аннотация: Climate change impacts the characteristics of the vegetation carbon-uptake process in the northern Eurasian terrestrial ecosystem. However, the currently available direct CO2 flux measurement datasets, particularly for central Siberia, are insufficient for understanding the current condition in the northern Eurasian carbon cycle. Here, we report daily and seasonal interannual variations in CO2 fluxes and associated abiotic factors measured using eddy covariance in a coniferous forest and a bog near Zotino, Krasnoyarsk Krai, Russia, for April to early June, 2013–2017. Despite the snow not being completely melted, both ecosystems became weak net CO2 sinks if the air temperature was warm enough for photosynthesis. The forest became a net CO2 sink 7–16 days earlier than the bog. After the surface soil temperature exceeded ~1?C, the ecosystems became persistent net CO2 sinks. To change into the full spring photosynthesis recovery, the forest is likely to need a minimum accumulated air temperature of ~80 to 137?C, and the bog requires 141 to 211?C. During these periods, soil temperature in the forest still remained nearly 0?C, suggesting that it is likely that forests appear more sensitive to the rise of air temperature than bogs. Net ecosystem productivity was highest in 2015 for both ecosystems because of the anomalously high air temperature in May compared with other years. Our findings demonstrate that long-term monitoring of flux measurements at the site level, particularly during winter and its transition to spring, is essential for understanding the responses of the northern Eurasian ecosystem to spring warming. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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Держатели документа:
Max Planck Institute for Biogeochemistry, Jena, D07745, Germany
Bioclimatology, Faculty of Forest Science and Forest Ecology, University of Gottingen, Gottingen, 37077, Germany
Centre of Biodiversity and Sustainable Land Use (CBL), University of Gottingen, Gottingen, 37073, Germany
Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Sciences, University of Helsinki, P.O. Box 64, Helsinki, 00014, Finland
Institute for Atmospheric and Earth System Research (INAR)/Forest Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Viikinkaari 1, Helsinki, 00014, Finland
Yugra State University, Khanty-Mansiysk, 628012, Russian Federation
Climate Research Programme, Finnish Meteorological Institute, P.O. Box 503, Helsinki, 00101, Finland
Vladimir Nikolayevich Sukachev Institute of Forest of the Siberian Branch of Russian Academy of Sciences, Separated Department of the KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea

Доп.точки доступа:
Park, S. -B.; Knohl, A.; Migliavacca, M.; Thum, T.; Vesala, T.; Peltola, O.; Mammarella, I.; Prokushkin, A.; Kolle, O.; Lavric, J.; Park, S. S.; Heimann, M.