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

/ C. J. Nichol, O. Shibistova // Tellus. Series B: Chemical and physical meteorology. - 2002. - Vol. 54B, № 5. - С. 677-687
Аннотация: The relationship between a physiological index called the photochemical reflectance index (PRI) and photosynthetic light-use-efficiency (LUE) of a Siberian boreal forest during the winter-spring transition, or green-up period, was investigated in 2000. During this time the photosynthetic apparatus was considered under stress as a result of extremes of temperature (from -20 to 35 degreesC) coupled with a high radiation load. Reflectance measurements of four stands were made from a helicopter-mounted spectroradiometer and PRI was calculated from these data. Eddy covariance towers were operating at the four stands and offered a means to calculate LUE. A significant linear relationship was apparent between PRI, calculated from the helicopter spectral data, and LUE, calculated from the eddy covariance data, for the four sites sampled. Reflectance measurements were also made of a Scots pine stand from the eddy covariance tower. Needles were also sampled during the time of spectral data acquisition for xanthophyll pigment determination. Strong linear relationships were observed among PRI, the epoxidation state of the xanthophyll cycle (EPS) and LUE over the green-up period and the diurnal cycle at the canopy scale.

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Держатели документа:
Russian Acad Sci, Inst Forest, Siberian Branch, Krasnoyarsk, Russia

Доп.точки доступа:
Nichol, C.J.; Найчол С.Дж.; Shibistova, Olga Borisovna; Шибистова, Ольга Борисовна

/ J. Lloyd, N. Tchebakova, O. Shibistova // Tellus. Series B: Chemical and physical meteorology. - 2002. - Vol. 54B, № 5. - С. 749-767
Аннотация: Using light aircraft and at intervals of approximately 14 days, vertical profiles of temperature, humidity, CO2 concentration and C-13/C-12 and O-18/O-16 ratio, as well as concentrations of CH4, CO, H-2 and N2O, from about 80 to 3000 m above ground level have been determined for the atmosphere above a flux measurement tower located near the village of Zotino in central Siberia (60degrees45'N, 89degrees23'E). As well as being determined from flask measurements (typically at heights of 100, 500, 1000, 1500, 2000, 2500 and 3000 m) continuous CO2 concentration profiles at 1 Hz have also been obtained using an infrared gas analyser. This measurement program is ongoing and has been in existence since July 1998. Data to November 2000 are presented and show a seasonal cycle for CO2 concentration of about 25 mumol mol(-1) within the atmospheric boundary layer (ABL) and about 15 mumol mol(-1) in the free troposphere. Marked seasonal cycles in the isotopic compositions Of CO2 are also observed, with that of oxygen-18 in CO2 being unusual: always being depleted in the ABL with respect to the free troposphere above. This is irrespective of whether the CO2 concentration is higher or lower in the free troposphere. We interpret this as indicating a net negative discrimination being associated with the net terrestrial carbon exchange, irrespective of whether photosynthesis or respiration dominates the net carbon flux in this region. During winter flights, large fluctuations in CO2 concentration with height are often observed both within and above the stable ABL. Usually (but not always) these variations in CO2 concentrations are associated with more or less stoichiometrically constant variations in CO and CH4 concentrations. We interpret this as reflecting the frequent transport of polluted air from Europe with very little vertical mixing having occurred, despite the large horizontal distances traversed. This notion is supported by back-trajectory analyses. Vertical profiles Of CO2 concentration with supplementary flask measurements allow more information on the structure and composition of an air mass to be obtained than is the case for flask measurements or for ground-based measurements only. In particular, our data question the notion that there is usually anything like "well mixed background air" in the mid-to-high northern latitudes during the winter months.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Lloyd, J.; Лойд Дж.; Tchebakova, Nadezhda Mikhailovna; Чебакова, Надежда Михайловна; Shibistova, Olga Borisovna; Шибистова, Ольга Борисовна

: материалы временных коллективов / K. Takayoshi, K. Satoshi, O. V. Masyagina // Eurasian Journal of Forest Research. - 2007. - Vol. 10-1. - С. 115-119. - Библиогр. в конце ст.
Аннотация: Dynamics of nitrogen in leaves of trees and seedlings of deciduous broad-leaf species were studied for improving forest management. The photosynthetic traits of canopy leaves of diciduous broad-leaved trees were measured using a canopy tower. There was a clear positive correlation between leaf nitrogen content and light saturated photosynthetic rate at sunny canopy. As reflecting the shoot development pattern, leaf senescence began from the inner part of the crown in early successional species, by contrast leaf senescence process commences from either the outer or top portion of the crown in late successional species. For regenerated seedlings in forest floor, seasonal change in the allocation pattern of leaf nitrogen coincided with the changing of light conditions through the leaf phenology of upper canopy. In light limited condition, nitrogen was allocated to chlorophyll while it allocated to more to photosynthetic carbon fixation, i.e. Rubisco in strong light condition. Nitrogen allocated was affected more by light to CO2 condition that was found in birch and beech seedlings with a FACE system.

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

Доп.точки доступа:
Takayoshi, K.; Такаёши К.; Satoshi, K.; Сатоши К.; Masyagina, Oksana Viktorovna; Масягина, Оксана Викторовна
Имеются экземпляры в отделах:
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: материалы временных коллективов / H. Balzter [и др.] // Environmental change in Siberia: earth observation, field studies and modelling. - Dordrecht et. al. : Springer, 2010. - С. 37-51. - Библиогр. в конце ст.
Аннотация: Long-term monitoring of forest ecosystems highlights the tendencies of formations composition change. Besides, it may be useful to estimate resistance and flexibility of tree populations on the border of mixed fir-aspen and light-coniferous-birch forests in the past, present and future.

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

Доп.точки доступа:
Nazimova, Dina Ivanovna; Назимова, Дина Ивановна; Исмаилова, Дилшад Магомедовна

: материалы временных коллективов / I. N. Bezkorovaynaya // 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. 305-307. - Библиогр. в конце ст.
Аннотация: Estimating terrestrial ecosystem CO2 fluxes is very important for our understanding of the global carbon cycle. This paper presents a zero-dimensional mathematical model of the ecosystem of Siberian boreal forests. It was used for comparison tall-tower-based CO2 fluxes with biometric field measurements. The model is a system of ordinary differential equations with additional conditions superimposed on the parameters. The main occurring proceses.are described - photosynthesis, respiration, seasonal changes of active phytomass, water balance of trees, the influence of light, humidity, and temperature of phytosynthesis and respiration.

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

Доп.точки доступа:
Barkhatov, Y.V.; Бархатов Й.В.; Timokhina, Anastasiya Vladimirovna; Panov, Alexey Vasil'yevich; Панов, Алексей Васильевич; Vedrova, Estella Fedorovna; Ведрова, Эстелла Федоровна; Trefilova, Ol'ga Vladimirovna; Трефилова, Ольга Владимировна

/ M. L. Bagard [et al.] // Geochim. Cosmochim. Acta. - 2013. - Vol. 114. - P169-187, DOI 10.1016/j.gca.2013.03.038. - Cited References: 104. - We thank T. Bullen and two anonymous reviewers for their thorough and constructive reviews and A. Jacobson for editorial handling. S. Gangloff is thanked for her assistance with Ca isotope chemistry and T. Perrone for his help in measuring Sr isotopes. This work was supported by the French INSU-CNRS program "EC2CO-Cytrix", and CNRS program "GDRI CAR-WET-SIB, ANR "Arctic Metals", programs of presidium UroRAS and RAS. It was also supported by the funding from the Region Alsace, France, and the CPER 2003-2013 "REALISE". MLB benefited the funding of a Ph.D. scholarship from the French Ministry of National Education and Research. This is an EOST-LHyGeS contribution. . - 19. - ISSN 0016-7037РУБ Geochemistry & Geophysics

Аннотация: Stable Ca and radiogenic Sr isotope compositions were measured in different compartments (stream water, soil solutions, rocks, soils and soil leachates and vegetation) of a small permafrost-dominated watershed in the Central Siberian Plateau. The Sr and Ca in the area are supplied by basalt weathering and atmospheric depositions, which significantly impact the Sr isotopic compositions. Only vegetation significantly fractionates the calcium isotopes within the watershed. These fractionations occur during Ca uptake by roots and along the transpiration stream within the larch trees and are hypothesised to be the result of chromatographic processes and Ca oxalate crystallisations during Ca circulation or storage within plant organs. Biomass degradation significantly influences the Ca isotopic compositions of soil solutions and soil leachates via the release of light Ca, and organic and organo-mineral colloids are thought to affect the Ca isotopic compositions of soil solutions by preferential scavenging of Ca-40. The imprint of organic matter degradation on the delta Ca-44/40 of soil solutions is much more significant for the warmer south-facing slope of the watershed than for the shallow and cold soil active layer of the north-facing slope. As a result, the available stock of biomass and the decomposition rates appear to be critical parameters that regulate the impact of vegetation on the soil-water system in permafrost areas. Finally, the obtained delta Ca-44/40 patterns contrast with those described for permafrost-free environments with a much lower delta Ca-44/40 fractionation factor between soils and plants, suggesting specific features of organic matter decomposition in permafrost environments. The biologically induced Ca isotopic fractionation observed at the soil profile scale is not pronounced at the scale of the streams and large rivers in which the delta Ca-44/40 signature may be controlled by the heterogeneity of lithological sources. (C) 2013 Elsevier Ltd. All rights reserved.

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Держатели документа:
[Bagard, Marie-Laure
Schmitt, Anne-Desiree
Chabaux, Francois
Stille, Peter] Univ Strasbourg, F-67084 Strasbourg, France
[Bagard, Marie-Laure
Schmitt, Anne-Desiree
Chabaux, Francois
Stille, Peter] CNRS, EOST, LHyGeS, F-67084 Strasbourg, France
[Schmitt, Anne-Desiree] Univ Franche Comte, CNRS, UMR 6249, F-25030 Besancon, France
[Pokrovsky, Oleg S.
Viers, Jerome] Univ Toulouse 3, CNRS, UMR 5563, Geosci & Environm Toulouse, F-31400 Toulouse, France
[Pokrovsky, Oleg S.] Russian Acad Sci, Inst Ecol Problems North, Arkhangelsk, Russia
[Labolle, Francois] Univ Strasbourg, Inst Zool & Biol Gen, F-67000 Strasbourg, France
[Prokushkin, Anatoly S.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk, Russia
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28

Доп.точки доступа:
Bagard, M.L.; Schmitt, A.D.; Chabaux, F...; Pokrovsky, O.S.; Viers, J...; Stille, P...; Labolle, F...; Prokushkin, A.S.

/ I. L. Milyutina, N. E. Sudachkova, L. I. Romanova // Contemp. Probl. Ecol. - 2013. - Vol. 6, Is. 2. - P149-155, DOI 10.1134/S199542551302011X. - Cited References: 29 . - 7. - ISSN 1995-4255РУБ Ecology

Аннотация: The effect of stand density on the antioxidant system of Scots Pine (Pinus silvestris L.) and Siberian Pine (Pinus sibirica Du Tour) was studied. The dynamics of concentrations of chlorophyll, hydrogen peroxide, glutathione, ascorbic acid, and dehydroascorbic acid were investigated during the vegetation period. In addition, the activities of superoxide dismutase, catalase, peroxidase, glutathione reductase, and ascorbate peroxidase were observed in the 1-year needles of 26-year-old trees with an initial stand density of 0.5 and 128 thousand individuals ha(-1).

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Держатели документа:
[Milyutina, I. L.
Sudachkova, N. E.
Romanova, L. I.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Milyutina, I.L.; Sudachkova, N.E.; Romanova, L.I.

/ M. D. Evdokimenko // Eurasian Soil Sci. - 2013. - Vol. 46, Is. 2. - P117-126, DOI 10.1134/S106422931302004X. - Cited References: 21 . - 10. - ISSN 1064-2293РУБ Soil Science

Аннотация: Pyrogenic transformations of the physical state of cryogenic soils in the southern and middle taiga were investigated. The long-term dynamics of the microclimate on burns and the soil temperature and moisture to the depth of 120 cm were studied. Data on the postfire restoration of the ground cover are presented. Experiments on artificial sprinkling of burned areas differing in the degree of the burning out of the forest litter, the slope gradient, etc., have been performed. An experimental model demonstrating the relationships between the surface runoff and five environmental factors has been proposed. The pyrogenic destruction of the ground cover and the lower phytocenosis layers was accompanied by significant disturbances of the microclimate and anomalous thawing of the permafrost on the burns. In the pine stand on the colluvial fan after the intense fire, the soil temperature at the depth of 10 cm ( in the summer) exceeded the control value by 3-5 degrees C; in the larch forest on the southern slope of the Stanovoi Ridge, it increased by 1.5-2.0 times after the fire of medium intensity. On the mountain slopes, the surface runoff was significantly intensified, which resulted in drastic environmental and silvicultural consequences.

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Держатели документа:
Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Evdokimenko, M.D.

/ I. . Svanberg [et al.] // Acta Soc. Bot. Pol. - 2012. - Vol. 81, Is. 4. - P343-357, DOI 10.5586/asbp.2012.036. - Cited References: 176 . - 15. - ISSN 0001-6977РУБ Plant Sciences

Аннотация: In this article we review the use of tree saps in northern and eastern Europe. Published accounts by travellers, ethnologists and ethnobotanists were searched for historical and contemporary details. Field observations made by the authors have also been used. The presented data shows that the use of tree sap has occurred in most north and eastern European countries. It can be assumed that tree saps were most used where there were extensive stands of birch or maple trees, as these two genera generally produce the largest amount of sap. The taxa most commonly used have been Betula pendula, B. pubescens, and Acer platanoides, but scattered data on the use of several other taxa are presented. Tree sap was used as a fresh drink, but also as an ingredient in food and beverages. It was also fermented to make light alcoholic products like ale and wine. Other folk uses of tree saps vary from supplementary nutrition in the form of sugar, minerals and vitamins, to cosmetic applications for skin and hair and folk medicinal use. Russia, Ukraine, Belarus, Estonia, Latvia and Lithuania are the only countries where the gathering and use of sap (mainly birch sap) has remained an important activity until recently, due to the existence of large birch forests, low population density and the incorporation of sap into the former Soviet economic system. It is evident that gathering sap from birch and other trees was more widespread in earlier times. There are records indicating extensive use of tree saps from Scandinavia, Poland, Slovakia and Romania, but it is primarily of a historical character. The extraction of tree sap in these countries is nowadays viewed as a curiosity carried out only by a few individuals. However, tree saps have been regaining popularity in urban settings through niche trading.

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Держатели документа:
[Soukand, Renata] Estonian Literary Museum, EE-51003 Tartu, Estonia
[Svanberg, Ingvar] Uppsala Univ, Uppsala Ctr Russian & Eurasian Studies, S-75120 Uppsala, Sweden
[Luczaj, Lukasz] Univ Rzeszow, Dept Bot & Biotechnol Econ Plants, PL-36100 Kolbuszowa, Poland
[Kalle, Raivo] Estonian Univ Life Sci, Inst Vet Med & Anim Sci, EE-51014 Tartu, Estonia
[Zyryanova, Olga] Russian Acad Sci, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Denes, Andrea] Janus Pannonius Museum, Nat Hist Dept, H-7601 Pecs, Hungary
[Papp, Nora] Univ Pecs, Dept Pharmacognosy, H-7624 Pecs, Hungary
[Nedelcheva, Aneli] Sofia Univ St Kliment Ohridski, Dept Bot, Sofia 1164, Bulgaria
[Seskauskaite, Daiva] Kaunas Forestry & Environm Engn Univ Appl Sci, LT-53101 Kaunas, Lithuania
[Kolodziejska-Degorska, Iwona] Warsaw Univ Bot Garden, PL-00478 Warsaw, Poland
[Kolodziejska-Degorska, Iwona] Univ Warsaw, Inst Interdisciplinary Res Artes Liberales, PL-00046 Warsaw, Poland
[Kolosova, Valeria] Russian Acad Sci, Inst Linguist Studies, St Petersburg 199053, Russia

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Svanberg, I...; Soukand, R...; Luczaj, L...; Kalle, R...; Zyryanova, O...; Denes, A...; Papp, N...; Nedelcheva, A...; Seskauskaite, D...; Kolodziejska-Degorska, I...; Kolosova, V...

/ N. M. Tchebakova, E. I. Parfenova // Bosque. - 2012. - Vol. 33, Is. 3. - P253-259, DOI 10.4067/S0717-92002012000300004. - Cited References: 22. - We ackowledge the support of the RFFI project 10-05-00941, the NASA LCLUC NEESPI project and NASA Interdisciplinary Science NNH09ZDA001N-IDS. . - 7. - ISSN 0717-9200РУБ Ecology + Forestry

Аннотация: Regional studies have shown that winters warmed 2-3 degrees C while summers warmed 1-2 degrees C during the1960-2010 period in central Siberia. Increased warming predicted from general circulation models (GCMs) by the end of the century is expected to impact Siberian vegetation. Our goal is to evaluate the consequences of climate warming on vegetation, forests, and forest-forming tree species in central Siberia. We use our envelope-type bioclimatic models of the Siberian forests and major tree conifer species based on three climatic indices which characterise their warmth and moisture requirements and cold resistance, and on one soil factor that charactrises their tolerance to permafrost. Coupling our bioclimatic models with the climatic indices and the permafrost distributions, we predict the potential habitats of forests and forest-forming tree species in current climate conditions and also in the 2080 projected climate. In the 2080 drier climate conditions, Siberian forests are simulated to decrease significantly and shift northwards while forest-steppe and steppe would come to dominate 50 % of central Siberia. Permafrost is not predicted to thaw deep enough to sustain dark (Pinus sibirica, Abies sibirica, and Picea obovata) taiga. Dahurian larch (L. gmelinii+cajanderi), which is able to withstand permafrost, would remain the dominant tree species. Light conifers (Larix spp. and Pinus sylvestris) may gain an advantage over dark conifers in a predicted dry climate due to their resistance to water stress and wildfire. Habitats for new temperate broadleaf forests, non-existent in Siberia at present, are predicted by 2080.

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Держатели документа:
[Tchebakova, Nadezda M.
Parfenova, Elena I.] Russian Acad Sci, VNSukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Tchebakova, N.M.; Parfenova, E.I.

[Text] / G. A. Ivanova [et al.] // Environ. Res. Lett. - 2011. - Vol. 6, Is. 4. - Ст. 45203, DOI 10.1088/1748-9326/6/4/045203. - Cited References: 36. - The authors gratefully acknowledge financial support for this research from the National Aeronautics and Space Administration (NASA), the Land Cover Land Use Change (LCLUC) Science Program, the Russian Academy of Sciences, Siberian Branch, the Russian Fund of Fundamental Investigation, and International Science and Technology Center (project #3695). . - 6. - ISSN 1748-9326РУБ Environmental Sciences + Meteorology & Atmospheric Sciences

Аннотация: This study focused on structural analysis of ground carbon storage following fires in light conifer stands of the Lower Angara region (Siberia, Russia). Experimental fires of varying frontal intensity were conducted at Scots pine and mixed larch forests of southern taiga. Considerable amounts of surface and ground forest fuels (21-38 tC ha(-1)) enhanced low-to high-intensity fires. Post-fire carbon storage decreased by 16-49% depending on fire intensity and rate of spread, with depth of burn being 0.9-6.6 cm. Carbon emissions varied from 4.48 to 15.89 t ha(-1) depending on fire intensity and forest type. Depth of burn and carbon emissions for four major site types were correlated with a weather-based fire hazard index.

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Держатели документа:
[Ivanova, G. A.
Kukavskaya, E. A.] Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Conard, S. G.] US Forest Serv, Rocky Mt Res Stn, Missoula, MT USA
[McRae, D. J.] Canadian Forest Serv, Sault Ste Marie, ON P6A 2E5, Canada

Доп.точки доступа:
Ivanova, G.A.; Conard, S.G.; Kukavskaya, E.A.; McRae, D.J.

[Text] / M. D. Yevdokimenko // Russ. J. Ecol. - 2011. - Vol. 42, Is. 3. - P205-210, DOI 10.1134/S1067413611030052. - Cited References: 17. - This study was supported by the Russian Foundation for Basic research, project no. 08-04-00027. . - 6. - ISSN 1067-4136РУБ Ecology

Аннотация: Consideration is given to the results of studies on the postfire dynamics of Transbaikal forests, which are formed under conditions of highly arid climate and extreme pyrological regime. Data are presented on tree die-off and recruitment in naturally burned forests and in test stands affected by creeping fires differing in intensity. The hydrothermal regime of soils, precipitation runoff, and its multifactor models are discussed. It is shown that fires aggravate moisture deficiency on mountain slopes, impair the productivity of tree stands, and cause their digression. The statistics of forest fires and the risk of lightning fires are analyzed.

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Держатели документа:
Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Yevdokimenko, M.D.

[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] / J. . Heintzenberg [et al.] // Atmos. Chem. Phys. - 2011. - Vol. 11, Is. 16. - P8703-8719, DOI 10.5194/acp-11-8703-2011. - Cited References: 65. - The Max Planck Society in collaboration with the V. N. Sukachev Institute of Forest established the ZOTTO facility after many years of preparatory fieldwork, planning and massive investments. We thank E.-D. Schulze and M. Heimann (MPI Biogeochemistry), A. A. Onuchin, and S. Verchovetz, (V. N. Sukachev Institute of Forest) for their contributions to the establishment and management of ZOTTO, and Y. Kisilyakhov, A. Tsukanov (V. N. Sukachev Institute of Forest), M. Welling and N. Jurgens (MPI Chemistry), as well as S. Leinert and T. Muller (IfT) for technical support. The ZOTTO project is funded by the Max Plank Society through the International Science and Technology Center (ISTC) partner project #2757p within the framework of the proposal 'Observing and Understanding Biogeochemical Responses to Rapid Climate Changes in Eurasia', and by the German Research Council (DFG). We thank S. Schmidt and K. Kubler (MPI Jena) for their continuous logistic assistance during the experiment. We acknowledge U. Riebel (Technical University of Cottbus, Chair for Particle Technology) for generously sharing his technology of the corona discharge based aerosol neutralizer. We thank A. Wiedensohler (IfT Leipzig) for the fruitful discussions about environmental aerosol charging. . - 17. - ISSN 1680-7316РУБ Meteorology & Atmospheric Sciences

Аннотация: This paper analyses aerosol particle number size distributions, particulate absorption at 570 nm wavelength and carbon monoxide (CO) measured between September 2006 and January 2010 at heights of 50 and 300 m at the Zotino Tall Tower Facility (ZOTTO) in Siberia (60.8 degrees N; 89.35 degrees E). Average number, surface and volume concentrations are broadly comparable to former studies covering shorter observation periods. Fits of multiple lognormal distributions yielded three maxima in probability distribution of geometric mean diameters in the Aitken and accumulation size range and a possible secondary maximum in the nucleation size range below 25 nm. The seasonal cycle of particulate absorption shows maximum concentrations in high winter (December) and minimum concentrations in mid-summer (July). The 90th percentile, however, indicates a secondary maximum in July/August that is likely related to forest fires. The strongly combustion derived CO shows a single winter maximum and a late summer minimum, albeit with a considerably smaller seasonal swing than the particle data due to its longer atmospheric lifetime. Total volume and even more so total number show a more complex seasonal variation with maxima in winter, spring, and summer. A cluster analysis of back trajectories and vertical profiles of the pseudo-potential temperature yielded ten clusters with three levels of particle number concentration: Low concentrations in Arctic air masses (400-500 cm(-3)), mid-level concentrations for zonally advected air masses from westerly directions between 55 degrees and 65 degrees N (600-800 cm(-3)), and high concentrations for air masses advected from the belt of industrial and population centers in Siberia and Kazakhstan (1200 cm(-3)). The observational data is representative for large parts of the troposphere over Siberia and might be particularly useful for the validation of global aerosol transport models.

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Держатели документа:
[Heintzenberg, J.
Birmili, W.
Otto, R.] Leibniz Inst Tropospher Res, D-04318 Leipzig, Germany
[Andreae, M. O.
Mayer, J. -C.
Chi, X.] Max Planck Inst Chem, D-55020 Mainz, Germany
[Panov, A.] Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Heintzenberg, J...; Birmili, W...; Otto, R...; Andreae, M.O.; Mayer, J.C.; Chi, X...; Panov, A...

[Text] / T. . Wallenius [et al.] // Int. J. Wildland Fire. - 2011. - Vol. 20, Is. 2. - P248-254, DOI 10.1071/WF10020. - Cited References: 43. - Aleksey Sadvordaev, Galina Zrazhevskaya, Toivo Haltia and Antti Lavikainen helped with the challenging arrangements and the field work. Oskar Ofluds Stiftelse, Nordenskiolds Samfundet and Ulla Wallenius funded the expedition to central Siberia. The Maj and Tor Nessling Foundation (grant number 2003064), Emil Aaltonen Foundation and Finnish Academy (grant number 121919) financed this long-duration study from field work to publication. . - 7. - ISSN 1049-8001РУБ Forestry

Аннотация: To study the poorly known fire history of Larix-dominated forest in central Siberia, we collected samples from 200 trees in 46 systematically located study plots. Our study area stretches similar to 90 km from north to south along the River Nizhnyaya Tunguska in northern Irkustk district. Cross-dated tree-ring chronology for all samples combined extended from the year 1360 AD to the present and included 76 fire years and 88 separate fire events. Average fire cycle gradually lengthened from 52 years in the 18th century to 164 years in the 20th century. During the same time, the number of recorded fires decreased even more steeply, i.e. by more than 85%. Fires were more numerous but smaller in the past. Contrary to expectations, climate change in the 20th century has not resulted in increased forest fires in this region. Fire suppression may have contributed to the scarcity of fires since the 1950s. However, a significant decline in fires was evident earlier; therefore an additional explanation is required, a reduction in human-caused ignitions being likely in the light of historical accounts.

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Scopus

Держатели документа:
[Wallenius, Tuomo
Heikkinen, Juha] Finnish Forest Res Inst, Vantaa Res Unit, FI-01301 Vantaa, Finland
[Larjavaara, Markku] Smithsonian Trop Res Inst, Balboa, Ancon, Panama
[Shibistova, Olga] SB RAS, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Wallenius, T...; Larjavaara, M...; Heikkinen, J...; Shibistova, O...

[Text] / V. . Vlasenko, E. . Parfenova // Ekol. Bratisl. - 2005. - Vol. 24, Is. 1. - P80-88. - Cited References: 14 . - 9. - ISSN 1335-342XРУБ Ecology

Аннотация: The Sayano-Shushensky Nature Reserve is a standard primeval locus of high conservation value which remained undisturbed landscapes within the Altai-Sayan Mountain Land. In the plant cover the altitudinal belts are clearly expressed. The northern part of the Sayan-Shushensky reserve is included in moist areas of the Altai-Sayan forest vegetation zone and the Southern part of it is included in insufficiently moist areas of Central Asian forest zone. The ground vegetation of the reserve is presented by high-mountain tundra, meadows and shrub thicket sites, high-mountain open Pinus sibirica D u. T o u r. and Larix sibirica L e d e b. woodland, dark and light coniferous taiga, coniferous subtaiga, forest-steppe and steppe. As a whole forests occupy somewhat about 60% of the territory. Ecocenotic groups of species found in individual phytocoenoses in river basins of the northern part of the nature reserve are qualitatively different in composition and share from those ones found in the southern river basins. In the north, the high mountain ecocenotic species group enjoys the greatest abundance, and forest-meadow, taiga, and bog species are also represented substantially. Steppe and forest-steppe species are absent. Alpine, steppe, and forest-steppe species are found in equal shares in the southern part of the forest reserve. Invasive species are quite many. Taiga species contribution is three times less than in the north of the reserve. Conditions climatically optimal for the greatest species diversity are the result of a perfect balance of heat and moisture characteristics of subtaiga/forest-steppe altitudinal belt complexes (ABC). However, changes in phytochorological- and alpha-diversity of individual phyl.ocoenoses are influenced by ecological and phytocoenotic factors combined. The biggest number of species in the reserve occurs along the forest distribution boundaries - in subtaiga and high mountain open woodland whereas species are the fewest in mountain taiga. Conversely, phytomass loading is the greatest in mountain taiga and it decreases gradually towards alpine tundra and steppes.

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Scopus

Держатели документа:
Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Vlasenko, V...; Parfenova, E...

[Text] / E. A. Vaganov [et al.] // Astrobiology. - 2004. - Vol. 4, Is. 3. - P391-399, DOI 10.1089/ast.2004.4.391. - Cited References: 34 . - 9. - ISSN 1531-1074РУБ Astronomy & Astrophysics + Biology + Geosciences, Multidisciplinary

Аннотация: We analyzed tree rings in wood samples collected from some of the few surviving trees found close to the epicenter (within 4-5 km) of the Tunguska event that occurred on the last day of June 1908. Tree-ring growth shows a depression starting in the year after the event and continuing during a 4-5-year period. The most remarkable traces of the event were found in the rings' anatomical structure: (1) formation of "light" rings and a reduction of maximum density in 1908; (2) non-thickened tracheids (the cells that make up most of the wood volume) in the transition and latewood zones (the middle and last-formed parts of the ring, respectively); and (3) deformed tracheids, which are located on the 1908 annual ring outer boundary. In the majority of samples, normal earlywood and latewood tracheids were formed in all annual rings after 1908. The observed anomalies in wood anatomy suggest two main impacts of the Tunguska event on surviving trees-M defoliation and (2) direct mechanical stress on active xylem tissue. The mechanical stress needed to fell trees is less than the stress needed to cause the deformation of differentiating tracheids observed in trees close to the epicenter. In order to resolve this apparent contradiction, work is suggested on possible topographic modification of the overpressure experienced by these trees, as is an experimental test of the effects of such stresses on precisely analogous growing trees.

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Держатели документа:
Univ Arizona, Tree Ring Res Lab, Tucson, AZ 85721 USA
Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk, Russia
Russian Acad Sci, Inst Monitoring Climat & Ecol Syst, Siberian Branch, Tomsk, Russia

Доп.точки доступа:
Vaganov, E.A.; Hughes, M.K.; Silkin, P.P.; Nesvetailo, V.D.

[Text] / V. . Vlasenko // Ekol. Bratisl. - 2003. - Vol. 22, Is. 1. - P16-22. - Cited References: 22 . - 7. - ISSN 1335-342XРУБ Ecology

Аннотация: Making the map of ground vegetation and analysis of its present state have been realized as well as dynamic tendencies in development of forest communities from climatic optimum of the Holocene up to the present time have been revealed. Forests of the reserve are mainly overmatured. Presently the succession of mountain taiga- and grass larch and pine forests by fir stands occurs. As a reason for changing formation composition of the main forest forming tree species of the reserve the global climatic changes of the northern hemisphere are. Floristic abundance of forest communities is characterized by high variability. a-diversity increases from the mountain taiga altitude - vegetation belt to the belt of subtaiga forest-steppe what corresponds to the increase of heat providing gradient. High coefficient of beta-diversity value variation in taiga and grass forest ecotone as well as in old cutting areas of light-coniferous forests shows instability of these phytocoenoses and rather fast succession of coenoelements of light-coniferous formations by the dark-coniferous ones.

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Scopus

Держатели документа:
Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Academgorodok, Russia

Доп.точки доступа:
Vlasenko, V...

[Text] / A. V. Gourov // Entomol. Fenn. - 2000. - Vol. 11, Is. 1. - P57-66. - Cited References: 49 . - 10. - ISSN 0785-8760РУБ Entomology

Аннотация: Seven Hylobius species are known from Siberia, while the occurrence of three of them is doubtful. Information available about the supplementary feeding of adult weevils is reviewed. It is likely that H. abietis and H. albosparsus are the only species of economic significance in this territory. In the northern forest-steppe zone, adult weevils usually prefer to feed separately on isolated or border young trees under the canopy of light Scots pine stands, but avoid the undercanopy regeneration in the dense stands. In the southern taiga zone, adults are abundant on cutover areas where they feed in clumps of young regeneration. Tn fresh clearcuts, up to 100% of juvenile trees may be damaged by the feeding of weevils, whereas the damage intensity declines sharply with the distance to the clearcut. An edge effect in the distribution of adult weevils needs verification and, probably, is time-dependent. Inside the stands, the crowns of mature trees may constitute an additional food niche for adults if the usual sources and preferred environmental conditions are not available.

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Scopus

Держатели документа:
Russian Acad Sci, VN Sukachev Inst Forest, Lab Forest Zool, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Gourov, A.V.

[Text] / R. A. Monserud, N. M. Tchebakova, O. V. Denissenko // Paleogeogr. Paleoclimatol. Paleoecol. - 1998. - Vol. 139, Is. 01.02.2013. - P15-36, DOI 10.1016/S0031-0182(97)00127-2. - Cited References: 72 . - 22. - ISSN 0031-0182РУБ Geography, Physical + Geosciences, Multidisciplinary + Paleontology

Аннотация: A bioclimatic vegetation model is used to reconstruct the palaeoclimate of Siberia during the mid-Holocene, a warm. moist period also known as the Holocene climatic optimum. Our goal is to determine the magnitude of climatic anomalies associated with mapped changes in vegetation classes. Reconstructed anomalies are the logical outcome of the bioclimatic assumptions in the Siberia vegetation model operating on location-specific differences in the palaeomap of Khotinsky and the modern map of Isachenko. The Siberian vegetation model specifics the relationship between vegetation classes and climate using climatic indices (growing-degree days, dryness index, continentality index). These indices are then converted into parameters commonly used in climatic reconstructions: January and July mean temperatures. and annual precipitation. Climatic anomalies since the mid-Holocene are then displayed by latitude and longitude. An advantage of a model-based approach to climatic reconstruction is that grid cells can be modelled independently. without the need for interpolation to create smoothed temperature and precipitation contours. The resulting pattern of anomalies is complex. On average. Siberian winters in the mid-Holocene were 3.7 degrees C warmer than now, with greater warming in higher latitudes. The major winter warming was concentrated in the Taiga zone on the plains and tablelands of East Siberia, where a warm and moist climate was necessary to support a broad expanse of shade-tolerant dark-needled Taiga. January temperatures averaged about 1 degrees C warmer than now across southern Siberia. although large areas show no change. July temperature anomalies (0-5 degrees C) are distributed mostly latitudinally, with anomalies increasing with latitude above 65 degrees N. At latitudes below 65 degrees N, July temperature was nearly the same as today across Siberia. Based on July temperatures. Siberian summers in the mid-Holocene were 0.7 degrees C warmer than today's. Annual precipitation in Siberia was predicted to be 95 mm greater in the mid-Holocene than now. Most of the increase was concentrated in East Siberia (154 mm average increase). The precipitation anomalies are small in the south. Large precipitation anomalies are found in central and northeastern Siberia. This location corresponds rather closely to the large anomalies in January temperature in East Siberia. The annual precipitation Increase was > 200 mm more than present precipitation in Yakutia. This increase corresponds to the deep penetration of moisture-demanding dark-needled species (Pinus sibirica. Abies sibirica, Picea obovata) into East Siberia in the mid-Holocene, where currently only drought-resistant light-needled species (Larix spp.) are found. Another area of increased precipitation was along the Polar Circle in West Siberia and at the base of the Taymyr Peninsula in East Siberia. In combination with 2-5 degrees C warmer summers, moister climates there allowed forests to advance far northward into what is now the Tundra zone.

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Полный текст,
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Держатели документа:
Forest Serv, Rocky Mt Res Stn, USDA, Portland, OR 97205 USA
Forest Serv, Pacific NW Res Stn, USDA, Portland, OR 97205 USA
Russian Acad Sci, Siberian Branch, Sukachev Forest Inst, Krasnoyarsk 660036, Russia
Moscow State Univ, Dept Geog, Moscow 119899, Russia

Доп.точки доступа:
Monserud, R.A.; Tchebakova, N.M.; Denissenko, O.V.