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

/ J. Kurbatova, N. M. Tchebakova // Tellus. Series B: Chemical and physical meteorology. - 2002. - Vol. 54B, № 5. - С. 497-513

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

Доп.точки доступа:
Kurbatova, J.; Курбатова Дж.; Tchebakova, Nadezhda Mikhailovna; Чебакова, Надежда Михайловна

/ A. Arneth, O. Shibistova // Tellus. Series B: Chemical and physical meteorology. - 2002. - Vol. 54B, № 5. - С. 514-530

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

Доп.точки доступа:
Arneth, A.; Арнет А.; Shibistova, Olga Borisovna; Шибистова, Ольга Борисовна

/ E. -D. Schulze, A. S. Prokushkin, E. A. Vaganov // Tellus. Series B: Chemical and physical meteorology. - 2002. - Vol. 54B, № 5. - С. 531-536
Аннотация: Net ecosystem productivity (NEP) was studied in a bog located in the middle taiga of Siberia using two approaches, the accumulation of peat above the hypocotyl of pine trees, and the eddy covariance flux methodology. NEP was 0.84 tC ha(-1) yr(-1) using the peat accumulation method; it was 0.43-0.62 tC ha(-1) yr(-1) using eddy covariance over three growing seasons. These data were compared with NEP of the surrounding forest, which was 0.6 tC +/- 1.1 hat yr(-1). The trees growing on the bog reached a total height of about 3 m and an age of 80-120 yr when peat accumulation reached 0.5-0.6 m. At that stage the growth rate of the oldest trees declined. This indicates that there is a maximum age that can be reached by trees growing on hummocks (150 yr), depending on conditions. The data show that the determination of NEP in bogs by using the peat accumulation above the hypocotyl is a useful method which can be applied on a wide range of bog types, but it may systematically overestimate NEP. The total sink capacity for carbon assimilation of bogs is comparable to that of forest, although methane emissions and losses of dissolved organic carbon must be taken into account when assessing the regional carbon cycle.

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

Доп.точки доступа:
Schulze, E.-D.; Шульце Е-Д; Prokushkin, Anatoly Stanislavovich; Прокушкин, Анатолий Станиславович; Vaganov, Yevgeny Alexandrovich; Ваганов Евгений Александрович

: материалы временных коллективов / E. A. Vaganov, S. P. Efremov, A. A. Onuchin // Advances in the geological storage of carbon dioxide. International approaches to reduce anthropogenic greenhouse gas emissions. - 2006. - Vol. 65. - С. 17-34
Аннотация: Experimental study results show the importance of forest and bog ecosystems as carbon cycle regulators is determined by the complex interaction of zonal-climatic and forest conditions as well as by forest vegetation characteristics (which depend on varying carbon balance structure and energy-mass exchange processes).

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

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

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

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

: материалы временных коллективов / V. N. Sedykh // 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. 174-176. - Библиогр. в конце ст.
Аннотация: A number of forest studies found that forest stands developing on slopes of technogenic origin in oil gas production sites of Western Siberia are markedly more productive compared to surrounding natural stands and contribute to forested land proportions in forest-bog areas. This is believed to be a positive influence of oil and gas industries on the boreal forest development

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

Доп.точки доступа:
Седых, Владимир Николаевич

/ T. T. Efremova [et al.] // Eurasian Soil Sci. - 2013. - Vol. 46, Is. 1. - P51-60, DOI 10.1134/S1064229312120034. - Cited References: 29. - This work was supported by Program no. 26 of the Presidium of the Russian Academy of Sciences Biological Diversity and Project no. 2 of the Siberian Division of the Russian Academy of Sciences. . - 10. - ISSN 1064-2293РУБ Soil Science

Аннотация: A typological series of native Betula pubescens Ehrh. dendrocenoses along the channel of a river crossing a bog was studied. The variability of the mineral element reserves is described by geostatistical methods as the sum of a trend, autocorrelation, and random components. The contribution of deterministic and random components has been assessed in the years with average precipitation and in the year of 2007 with high and long-term flooding. The empirical variograms and the parameters of the model variograms are presented. The class of the spatial correlation of the ash reserves is described. A primary cause of the ash content's variability is the specific water regime, which is determined by the following: (i) the abundance and duration of the spring floods responsible for the silt mass brought by the river and (ii) the draining effect of the intrabog river, the distance from which provided the formation in the forest of the ground cover with the specific species composition and ash content. The falloff of the arboreal layer in the bog birch forests formed the fundamental mineral background of the litter.

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Держатели документа:
[Efremova, T. T.
Sekretenko, O. P.
Avrova, A. F.
Efremov, S. P.] Russian Acad Sci, Sukachev Inst Forest, Siberian Div, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Efremova, T.T.; Sekretenko, O.P.; Avrova, A.F.; Efremov, S.P.

/ I. D. Grodnitskaya [et al.] // Eurasian Soil Sci. - 2013. - Vol. 46, Is. 1. - P61-73, DOI 10.1134/S1064229313010043. - Cited References: 39. - This work was supported by the Russian Foundation for Basic Research (project nos. 09-04-01380-a, 11-05-00374-a, and 11-04-01884-a) and by the Ministry of Education and Science of the Russian Federation (project no. 2.1.1/6611). . - 13. - ISSN 1064-2293РУБ Soil Science

Аннотация: The microbial activity of peat soils was studied in boggy larch forests and in an oligo-mesotrophic bog in the basins of the Kochechum and Nizhnaya Tunguska rivers (central Evenkia). It was found that the organic matter transformation in the peat soils of all the plots is mainly performed by oligotrophic bacteria composing 88-98% of the total bacterial complex. The major contribution to the organic matter destruction belonged to the heterotrophic microorganisms, the activity of which depended on the permafrost depth and the soil temperature, the soil acidity, and the botanical composition of the peat. Peat soils were characterized by different activities as judged from their microbiological and biochemical parameters. The functioning of microbial communities in the studied ecotopes of the permafrost zone was within the range of natural variations, which pointed to their ecological stability.

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Держатели документа:
[Grodnitskaya, I. D.
Karpenko, L. V.
Knorre, A. A.
Syrtsov, S. N.] Russian Acad Sci, Sukachev Inst Forestry, Siberian Div, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Grodnitskaya, I.D.; Karpenko, L.V.; Knorre, A.A.; Syrtsov, S.N.

[Text] / O. P. Sekretenko [et al.] ; ed.: A Stein, E Pebesma, Pebesma, // 1ST CONFERENCE ON SPATIAL STATISTICS 2011 - MAPPING GLOBAL CHANGE. Ser. Procedia Environmental Sciences : ELSEVIER SCIENCE BV, 2011. - Vol. 3: 1st International Conference on Spatial Statistics - Mapping Global Change (MAR 23-25, 2011, Enschede, NETHERLANDS). - P99-104, DOI 10.1016/j.proenv.2011.02.018. - Cited References: 6 . - 6. - ISBN 1878-0296РУБ Environmental Sciences + Geography, Physical

Аннотация: The ash stock in forest litter influences the fertility of forest soil and should be studied. Litter samples were taken at 70 locations within a 270x60 metre transect in 2004-2007 in the bog birch forest, western Siberia. A geostatistical model with external trend was applied to describe the spatial pattern of the ash mass (kg m(-2)) on the forest floor. Hydrological factors, used as explanatory variables in an external trend equation, account for the main portion of spatial variation (83% and 49% in the years of, respectively, low and high spring flooding). Covariance structure of the data, connected with patterns of vegetation and silt deposits, explains the smaller portion of spatial variation (12% and 38%). The unexplained variation is minor (5% and 13%). (c) 2010 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Spatial Statistics 2011

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Держатели документа:
[Sekretenko, O. P.
Efremova, T. T.
Avrova, A. F.
Efremov, S. P.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Sekretenko, O.P.; Efremova, T.T.; Avrova, A.F.; Efremov, S.P.; Stein, A \ed.\; Pebesma, E \ed.\; Pebesma, \ed.\

[Text] / T. T. Efremova, S. P. Efremov, A. F. Avrova // Eurasian Soil Sci. - 2010. - Vol. 43, Is. 8. - P858-866, DOI 10.1134/S106422931008003X. - Cited References: 11. - This work was supported by the Russian Foundation for Basic Research, project no. 08-04-92501. . - 9. - ISSN 1064-2293РУБ Soil Science

Аннотация: A formalized arrangement of morphogenetic types of litter according to the physicochemical parameters provided their significant grouping in three genetic associations. The litter group (highly decomposed + moderately decomposed) is confined to the tall-grass group of bog birch forests. The rhizomatous (roughly decomposed) litter is formed in the sedge-reed grass bog birch forests. The litter group (peaty + peatified + peat) is associated with the bog-herbaceous-moss group of forest types. The genetic associations of the litters (a) reliably characterize the edaphic conditions of bog birch forests and (b)correspond to formation of the peat of certain ecological groups. We found highly informative the acid-base parameters, the exchangeable cations (Ca(2+) + Mg(2+)) and the total potential acidity, which differentiated the genetic associations of litter practically with 100% probability. The expediency of studying litters under groups of forest types rather than under separate types of bog birch forests was demonstrated.

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Держатели документа:
[Efremova, T. T.
Efremov, S. P.
Avrova, A. F.] Russian Acad Sci, Sukachev Inst Forestry, Siberian Div, Akad Gorodok, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Efremova, T.T.; Efremov, S.P.; Avrova, A.F.

[Text] / L. V. Karpenko // Contemp. Probl. Ecol. - 2010. - Vol. 3, Is. 2. - P221-227, DOI 10.1134/S199542551002013X. - Cited References: 12 . - 7. - ISSN 1995-4255РУБ Ecology

Аннотация: Comprehensive stratigraphic analyses of a standard peat profile laid on a large oligotrophic bog in the interfluve of Kas and Sym rivers, left tributaries of the Yenisei River, allowed reconstruction of local vegetation change and hydrological regime over a period of seven thousand years. The established three stages in vegetation succession in a local bog correspond to different degree of humidification. The development of bog ecosystem is found to be scarcely affected by regional climate. The process and rate of peat accumulation varied in different periods of the Holocene. The average rate of peat accumulation in the profile was 0.88 mm/year.

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

Доп.точки доступа:
Karpenko, L.V.

[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] / 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] / I. A. Goncharova // Contemp. Probl. Ecol. - 2008. - Vol. 1, Is. 4. - P467-475, DOI 10.1134/S1995425508040127. - Cited References: 18. - The work was financially supported by Krasnoyarsk Krai Scientific Foundation, grant 16G066. . - 9. - ISSN 1995-4255РУБ Ecology

Аннотация: The species composition and distribution of mosses over microrelief features on bogs have been assessed with various types of the water-mineral nutrient supply. The density of moss stalks in different moss species mats has been examined. Fraction analysis has been applied to weight and morphological characteristics of moss stalks. The contributions made by each fraction to the biomass production have been estimated. The linear and weight parameters of the photosynthesizing layer in mosses have been determined.

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Держатели документа:
RAS, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Goncharova, I.A.

[Текст] : материалы временных коллективов / Т. Т. Ефремова, А. Ф. Аврова, С. П. Ефремов // Сибирский экологический журнал. - 2013. - Т. 20, № 5. - С. 751-760. - Библиогр. в конце ст.
Аннотация: На градиенте крупнотравные – сфагново-мертвопокровные болотные березняки выделено шесть морфогенетических типов лесной подстилки: сильноразложившаяся, среднеразложившаяся, корневищная (груборазложившаяся), торфянистая, оторфованная и торфяная. Специфика их биохимической трансформации обусловлена величиной накопления гуминовых кислот преимущественно 1-й фракции на фоне относительно равномерной скорости формирования фульвокислот. Интенсивность образования ГК-1 тесно положительно связана с биологической активностью субстрата, судя по C/N. Однако нечеткие различия этих показателей в лесоводственно-морфологических типах подстилок ограничивают их диагностическую надежность. Сгруппированные биохимические категории подстилок – мягкие (среднеи сильноразложившиеся), переходные (корневищная, торфянистая, оторфованная) и грубые (моховая) – высокозначимо дискриминируются как отношением C/N – 20, 30, 40, так и содержанием ГК-1 – 14, 10, 6 % соответственно.

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Ефремова, Тамара Тимофеевна; Аврова, Ада Федоровна; Avrova Ada Fyedorovna; Ефремов, Станислав Петрович; Yefryemov Stanislav Petrovich; Yefryemova Tamara Timofyeyevna

[Text] / N. N. Vygodskaya [et al.] // Environ. Res. Lett. - 2007. - Vol. 2, Is. 4. - Ст. 45033, DOI 10.1088/1748-9326/2/4/045033. - Cited References: 33 . - 7. - ISSN 1748-9326РУБ Environmental Sciences + Meteorology & Atmospheric Sciences

Аннотация: The climate system and terrestrial ecosystems interact as they change. In northern Eurasia these interactions are especially strong, span all spatial and timescales, and thus have become the subject of an international program: the Northern Eurasia Earth Science Partnership Initiative (NEESPI). Without trying to cover all areas of these interactions, this paper introduces three examples of the principal micrometeorological, mesometeorological and subcontinental feedbacks that control climate-terrestrial ecosystem interactions in the boreal zone of northern Eurasia. Positive and negative feedbacks of forest paludification, of windthrow, and of climate-forced displacement of vegetation zones are presented. Moreover the interplay of different scale feedbacks, the multi-faceted nature of ecosystems-climate interactions and their potential to affect the global Earth system are shown. It is concluded that, without a synergetic modeling approach that integrates all major feedbacks and relationships between terrestrial ecosystems and climate, reliable projections of environmental change in northern Eurasia are impossible, which will also bring into question the accuracy of global change projections.

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Держатели документа:
[Vygodskaya, N. N.] Jan Kochanowski Univ Humanities & Sci, Inst Geog, Sventokshistkaya Acad Poland, PL-25406 Kielce, Poland
[Groisman, P. Ya] Natl Climat Ctr, Asheville, NC 28801 USA
[Tchebakova, N. M.
Parfenova, E. I.] VN Sukachev Inst Forest, Siberian Branch Russian Acad Sci, Krasnoyarsk 660036, Russia
[Kurbatova, J. A.] Russian Acad Sci, AN Severtsov Inst Ecol & Evolut, Moscow 119071, Russia
[Panfyorov, O.] Univ Gottingen, Inst Bioclimatol, D-37077 Gottingen, Germany
[Sogachev, A. F.] Univ Helsinki, Dept Phys Sci, FI-00014 Helsinki, Finland

Доп.точки доступа:
Vygodskaya, N.N.; Groisman, P.Y.; Tchebakova, N.M.; Kurbatova, J.A.; Panfyorov, O...; Parfenova, E.I.; Sogachev, A.F.

[Text] / T. T. Efremova, T. M. Ovchinnikova // Biol. Bull. - 2007. - Vol. 34, Is. 3. - P297-302, DOI 10.1134/S1062359007030132. - Cited References: 12 . - 6. - ISSN 1062-3590РУБ Biology

Аннотация: Multivariate analysis unambiguously demonstrated the differentiation of oxidoreductase activity (catalase, peroxidase, and dehydrogenase) in peat soils after a 20-25-year period of bog drainage and afforestation. The enzyme activity depended on the drainage depth. A statistical model has been developed to predict the degree of humification of peat organic matter from peroxidase activity and moisture of drained soils. Soil peroxidase activity can be an important indicator of the degree of biochemical transformation of drained and forested bogs.

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

Доп.точки доступа:
Efremova, T.T.; Ovchinnikova, T.M.

[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] / S. T. Im [et al.] // IGARSS 2003: IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS I - VII, PROCEEDINGS: LEARNING FROM EARTH'S SHAPES AND SIZES. Ser. IEEE International Symposium on Geoscience and Remote Sensing (IGARSS) : IEEE, 2003. - 23rd International Geoscience and Remote Sensing Symposium (IGARSS 2003) (JUL 21-25, 2003, TOULOUSE, FRANCE). - P2562-2564. - Cited References: 2 . - 3. - ISBN 0-7803-7929-2РУБ Geosciences, Multidisciplinary + Instruments & Instrumentation + Remote Sensing + Imaging Science & Photographic Technology

Аннотация: Radarsat data validity in classification of Siberian plain taiga ecosystems along the Yenisei River (1GBP transect, 90 E) was analyzed. Six test areas were selected. Those areas represent a variety of the main ecosystem and physical-geographical conditions from the tundra to the southern taiga (forest) zones. The analysis of Radarsat signal amplitude, textural characteristics and digital elevation fused data allowed the detection of 18 onground classes. For the purpose of classification the importance of parameters arrange as follows: relief, signal amplitude, skewness, variance, mean Euclidean distance and kurtosis. The main advantage of the Radarsat data is its ability to detect hydromorphic elements (7 bog types were determined).

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Держатели документа:
Sukachev Inst Forest, Krasnoyarsk, Russia

Доп.точки доступа:
Im, S.T.; Gorodzankina, S.M.; Kharuka, V.I.; Ranson, K.J.

[Text] / A. . Arneth [et al.] // Tellus Ser. B-Chem. Phys. Meteorol. - 2002. - Vol. 54, Is. 5. - P514-530, DOI 10.1034/j.1600-0889.2002.01349.x. - Cited References: 53 . - 17. - ISSN 0280-6509РУБ Meteorology & Atmospheric Sciences

Аннотация: Net ecosystem-atmosphere exchange of CO2 (NEE) was measured in two boreal bogs during the snow-free periods of 1998, 1999 and 2000. The two sites were located in European Russia (Fyodorovskoye), and in central Siberia (Zotino). Climate at both sites was generally continental but with more extreme summer-winter gradients in temperature at the more eastern site Zotino. The snow-free period in Fyodorovskoye exceeded the snow-free period at Zotino by several weeks. Marked seasonal and interannual differences in NEE were observed at both locations, with contrasting rates and patterns. Amongst the most important contrasts were: (1) Ecosystem respiration at a reference soil temperature was higher at Fyodorovskoye than at Zotino. (2) The diurnal amplitude of summer NEE was larger at Fyodorovskoye than at Zotino. (3) There was a modest tendency for maximum 24 h NEE during average rainfall years to be more negative at Zotino (-0.17 versus -0.15 mol m(-2) d(-1)), suggesting a higher productivity during the summer months. (4) Cumulative net uptake of CO2 during the snow-free period was strongly related to climatic differences between years. In Zotino the interannual variability in climate, and also in the CO2 balance during the snow-free period, was small. However, at Fyodorovskoye the bog was a significant carbon sink in one season and a substantial source for CO2-C in the next, which was below-average dry. Total snow-free uptake and annual estimates of net CO2-C uptake are discussed, including associated uncertainties.

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Держатели документа:
Max Planck Inst Biogeochem, D-07701 Jena, Germany
Max Planck Inst Meteorol, D-20146 Hamburg, Germany
Severtsov Inst Ecol & Evolut, Moscow, Russia
VN Sukachev Forest Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Arneth, A...; Kurbatova, J...; Kolle, O...; Shibistova, O.B.; Lloyd, J...; Vygodskaya, N.N.; Schulze, E.D.