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

[Text] / Y. . Yohannes [et al.] // For. Ecol. Manage. - 2011. - Vol. 261, Is. 6. - P1090-1098, DOI 10.1016/j.foreco.2010.12.032. - Cited References: 56. - We would like to thank Deutsche Forschungsgesellschaft (DFG) for financial support of the study within the project package PAK 188. We thank Deksiso Bulcha, Getu Tadesse, Temesgen Yohannes, Abule Loya, and Awol Assefa for their assistance and support in collecting data in the field. We also thank Roger-Michael Klatt, Ulrike Pieper, Pieter Wiese and Holger Ciglasch for their laboratory assistance in soil analysis. Likewise we are grateful to Frank Schaarschmidt and Hany El Kateb for their advice in statistical analysis. . - 9. - ISSN 0378-1127РУБ Forestry

Аннотация: Variability of soil CO2 efflux strongly depends on soil temperature, soil moisture and plant phenology. Separating the effects of these factors is critical to understand the belowground carbon dynamics of forest ecosystem. In Ethiopia with its unreliable seasonal rainfall, variability of soil CO2 efflux may be particularly associated with seasonal variation. In this study, soil respiration was measured in nine plots under the canopies of three indigenous trees (Croton macrostachys, Podocarpus falcatus and Prunus africana) growing in an Afromontane forest of south-eastern Ethiopia. Our objectives were to investigate seasonal and diurnal variation in soil CO2 flux rate as a function of soil temperature and soil moisture, and to investigate the impact of tree species composition on soil respiration. Results showed that soil respiration displayed strong seasonal patterns, being lower during dry periods and higher during wet periods. The dependence of soil respiration on soil moisture under the three tree species explained about 50% of the seasonal variability. The relation followed a Gaussian function, and indicated a decrease in soil respiration at soil volumetric water contents exceeding a threshold of about 30%. Under more moist conditions soil respiration is tentatively limited by low oxygen supply. On a diurnal basis temperature dependency was observed, but not during dry periods when plant and soil microbial activities were restrained by moisture deficiency. Tree species influenced soil respiration, and there was a significant interaction effect of tree species and soil moisture on soil CO2 efflux variability. During wet (and cloudy) period, when shade tolerant late successional P. falcatus is having a physiological advantage, soil respiration under this tree species exceeded that under the other two species. In contrast, soil CO2 efflux rates under light demanding pioneer C. macrostachys appeared to be least sensitive to dry (but sunny) conditions. This is probably related to the relatively higher carbon assimilation rates and associated root respiration. We conclude that besides the anticipated changes in precipitation pattern in Ethiopia any anthropogenic disturbance fostering the pioneer species may alter the future ecosystem carbon balance by its impact on soil respiration. (C) 2010 Elsevier B.V. All rights reserved.

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[Yohannes, Yonas
Shibistova, Olga
Abate, Asferachew
Guggenberger, Georg] Leibniz Univ Hannover, Inst Soil Sci, D-30419 Hannover, Germany
[Yohannes, Yonas] Ethiopian Inst Agr Research, Forestry Res Ctr, Addis Ababa, Ethiopia
[Shibistova, Olga] SB RAS, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Fetene, Masresha] Univ Addis Ababa, Dept Biol, Addis Ababa, Ethiopia

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Yohannes, Y...; Shibistova, O...; Abate, A...; Fetene, M...; Guggenberger, G...

[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 1354-1013РУБ 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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[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...

[Text] / A. . Arneth [et al.] // Biogeosciences. - 2006. - Vol. 3, Is. 4. - P421-437. - Cited References: 67 . - 17. - ISSN 1726-4170РУБ Ecology + Geosciences, Multidisciplinary

Аннотация: We compare assimilation and respiration rates, and water use strategies in four divergent ecosystems located in cold-continental central Siberia and in semi-arid southern Africa. These seemingly unrelated systems have in common a harsh and highly seasonal environment with a very sharp transition between the dormant and the active season, with vegetation facing dry air and soil conditions for at least part of the year. Moreover, the northern high latitudes and the semi-arid tropics will likely experience changes in key environmental parameters (e.g., air temperature and precipitation) in the future; indeed, in some regions marked climate trends have already been observed over the last decade or so. The magnitude of instantaneous or daily assimilation and respiration rates, derived from one to two years of eddy covariance measurements in each of the four ecosystems, was not related to the growth environment. For instance, respiration rates were clearly highest in the two deciduous systems included in the analysis (a Mopane woodland In northern Botswana and a Downy birch forest in Siberia; 300mmol m(-2) d(-1)), while assimilation rates in the Mopane woodland were relatively similar to a Siberian Scots pine canopy for a large part of the active season (ca. 420 mmol m(-2) d(-1)). Acknowledging the limited number of ecosystems compared here, these data nevertheless demonstrate that factors like vegetation type, canopy phenology or ecosystem age can override larger-scale climate differences in terms of their effects on carbon assimilation and respiration rates. By far the highest rates of assimilation were observed in Downy birch, an early successional species. These were achieved at a rather conservative water use, as indicated by relatively low levels of lambda the marginal water cost of plant carbon gain. Surprisingly, the Mopane woodland growing in the semi-arid environment had significantly higher values of lambda However, its water use strategy included a very plastic response to intermittently dry periods, and values of lambda were much more conservative overall during a rainy season with low precipitation and high air saturation deficits. Our comparison demonstrates that forest ecosystems can respond very dynamically in terms of water use strategy, both on interannual and much shorter time scales. But it remains to be evaluated whether and in which ecosystems this plasticity is mainly due to a short-term stomatal response, or alternatively goes hand in hand with changes in canopy photosynthetic capacity.

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Держатели документа:
Lund Univ, Dept Phys Geog & Ecosyst Anal, S-22363 Lund, Sweden
Max Planck Inst Biogeochem, D-07701 Jena, Germany
Univ Wageningen & Res Ctr, Nat Conservat & Plant Ecol Grp, Wageningen, Netherlands
Univ Tuscia, Viterbo, Italy
Int Inst Geoinformat Sci & Earth Observat, Enschede, Netherlands
VN Sukachev Forest Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Arneth, A...; Veenendaal, E.M.; Best, C...; Timmermans, W...; Kolle, O...; Montagnani, L...; Shibistova, O...

[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...

[Text] / A. V. Timokhina [et al.] // Russ. J. Ecol. - 2015. - Vol. 46, Is. 2. - P143-151, DOI 10.1134/S1067413615020125. - Cited References:30. - The study of daily variability of CO2 atmospheric concentration at ZOTTO station and seasonal distribution of COINF2/INF over Siberia in comparison with Canada and the North Atlantic was supported by the Russian Science Foundation, project no. 14-24-00113. . - ISSN 1067-4136. - ISSN 1608-3334РУБ Ecology

Аннотация: The results of measurements of ground CO2 concentration in the middle taiga subzone of the Yenisei region of Siberia (the ZOTTO observatory) in 2009 to 2012 are presented. Specific features of CO2 variability over the altitude profile up to 301 m are accounted for by specific diurnal and seasonal features in the functioning of terrestrial ecosystems as well as by atmospheric processes. It has been shown that the significance of regional and global components increases with elevation, while the contribution of the underlying surface in the region of the observatory decreases. The observed gradient differences between CO2 concentrations recorded at the onset and at the end of the cold period are explained by seasonal changes in the height of the atmospheric boundary layer. Comparison of data obtained at the ZOTTO observatory and at monitoring stations in Canada and the North Atlantic has shown that general trends in the seasonal variability of CO2 are similar and that specific features of the processes under study are dependent on biogeographic characteristics of the study regions.

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Держатели документа:
Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia.
Max Planck Inst Biogeochem, D-07745 Jena, Germany.
ИЛ СО РАН

Доп.точки доступа:
Timokhina, A.V.; Prokushkin, A.S.; Onuchin, A.A.; Panov, A.V.; Kofman, G.B.; Heimann, M.; Russian Science Foundation [14-24-00113]

/ O. V. Masyagina, O. V. Menyailo, A. S. Prokushkin [et al.] // Arab. J. Geosci. - 2020. - Vol. 13, Is. 18. - Ст. 954, DOI 10.1007/s12517-020-05939-x. - Cited References:87. - The research was funded by the Russian Foundation of Basic Research (projects No. 19-29-05122, 18-41-242003, 18-34-00736, 18-05-60203), RFBR-NSFC (project No. 19-54-53026), and Japan Society for the Promotion of Science "KAKENHI" (Grant Number 19H02987). . - ISSN 1866-7511. - ISSN 1866-7538РУБ Geosciences, Multidisciplinary

Аннотация: Based on the long-term (12 years) data on soil respiration (SR) measurements in representative conifer forests of the Krasnoyarsk region (Central Siberia), we demonstrated specific characteristics of SR. The study sites located closely to Arctic Circle were related to different latitudes, including 56 degrees N (SAE site, Krasnoyarsk), 60 degrees N (ZOTTO site, Zotino), and 64 degrees N (Tura site, Evenkia). Study sites were selected in forest ecosystems (> 41 years old) and represented a wide range of the climate, stand, permafrost availability, and soil types. However, the mean seasonal values of SR (mean +/- SD) varied in a relatively narrow range from 2.11 +/- 0.69 in the forest-steppe zone (SAE) to 2.82 +/- 1.77 mu mol CO(2)m(-2)s(-1)in northern larch taiga (Tura). Nevertheless, a twofold difference in the duration of growing season among northern and southern locations results in a variation of total seasonal CO(2)emissions (mean +/- SD) from 216 +/- 136 g C m(-2)in larch stands of northern taiga to 369 +/- 115 g C m(-2)in larch stands of southern forest-steppe zone. Evaluation of the multiannual dynamics of SR over the past 1.5 decades (1995-2010) showed the escalation of SR in the permafrost larch stands (Tura) in 2005-2010. That has been coupled with the enhanced activity of the soil heterotrophic microbiota in 2007-2010. Our study highlights the importance of further monitoring of SR in permafrost Siberian ecosystems.

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Держатели документа:
RAS, SB, Sukachev Inst Forest, Fed Res Ctr,Krasnoyarsk Sci Ctr, 50-28 Akad Gorodok St, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, 79 Svobodny Ave, Krasnoyarsk 660041, Russia.
Yamagata Univ, Wakabamachi 1-23, Tsuruoka, Yamagata 9978555, Japan.
Hokkaido Univ, Sapporo, Hokkaido 0608589, Japan.
Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China.

Доп.точки доступа:
Masyagina, Oxana V.; Menyailo, Oleg V.; Prokushkin, Anatoly S.; Matvienko, Anastasia I.; Makhnykina, Anastasia V.; Evgrafova, Svetlana Yu.; Mori, Shigeta; Koike, Takayoshi; Prokushkin, Stanislav G.; Masyagina, Oxana; Evgrafova, Svetlana; Russian Foundation of Basic ResearchRussian Foundation for Basic Research (RFBR) [19-29-05122, 18-41-242003, 18-34-00736, 18-05-60203]; RFBR-NSFC [19-54-53026]; Japan Society for the Promotion of Science "KAKENHI"Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of ScienceGrants-in-Aid for Scientific Research (KAKENHI) [19H02987]

/ A. Panov, A. Prokushkin, K. R. Kuebler [et al.] // Atmosphere. - 2021. - Vol. 12, Is. 7. - Ст. 876, DOI 10.3390/atmos12070876. - Cited References:60. - This research was funded by the Russian Foundation for Basic Research, Krasnoyarsk Territory, and Krasnoyarsk Regional Fund of Science, project #20-45-242908, RFBR under the research project #18-05-60203, and by the Max Planck Society (Germany). The tasks of M.H. were supported by the Russian Science Foundation, project #21-17-00163, and Q-ARCTIC ERC Synergy project. . - ISSN 2073-4433РУБ Environmental Sciences + Meteorology & Atmospheric Sciences

Аннотация: Atmospheric observations of sources and sinks of carbon dioxide (CO2) and methane (CH4) in the pan-Arctic domain are highly sporadic, limiting our understanding of carbon turnover in this climatically sensitive environment and the fate of enormous carbon reservoirs buried in permafrost. Particular gaps apply to the Arctic latitudes of Siberia, covered by the vast tundra ecosystems underlain by permafrost, where only few atmospheric sites are available. The paper presents the first results of continuous observations of atmospheric CO2 and CH4 dry mole fractions at a newly operated station "DIAMIS" (73.506828 degrees N, 80.519869 degrees E) deployed on the edge of the Dikson settlement on the western coast of the Taimyr Peninsula. Atmospheric mole fractions of CO2, CH4, and H2O are measured by a CRDS analyzer Picarro G2301-f, which is regularly calibrated against WMO-traceable gases. Meteorological records permit screening of trace gas series. Here, we give the scientific rationale of the site, describe the instrumental setup, analyze the local environments, examine the seasonal footprint, and show CO2 and CH4 fluctuations for the daytime mixed atmospheric layer that is representative over a vast Arctic domain (-500-1000 km), capturing both terrestrial and oceanic signals.

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Держатели документа:
Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia.
Max Planck Inst Biogeochem, D-07745 Jena, Germany.
Mendel Univ Brno, Fac Forestry & Wood Technol, Dept Forest Bot Dendrol & Geobiocenol, Brno 61300, Czech Republic.
Joint Directorate Taimyr Nat Reserves, Norilsk 663305, Russia.
Univ Helsinki, Inst Atmospher & Earth Syst Res, Helsinki 00560, Finland.

Доп.точки доступа:
Panov, Alexey; Prokushkin, Anatoly; Kuebler, K. R.; Korets, Mikhail; Urban, Anastasiya; Bondar, Mikhail; Heimann, Martin; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science [20-45-242908]; RFBRRussian Foundation for Basic Research (RFBR) [18-05-60203]; Max Planck Society (Germany)Max Planck Society; Russian Science FoundationRussian Science Foundation (RSF) [21-17-00163]; Q-ARCTIC ERC Synergy project