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

w10=
Найдено документов в текущей БД: 52

    An approach to the assessment of the carbon balance and forest dynamics over large territories as influenced by forest fires and other disturbances
/ M. A. Sofronov, A. V. Volokitina, D. I. Nazimova // The role of boreal forests and forestry in the global carbon budget: Proc. of IBFRA 2000 Conference May 8-12 2000, Edmonton, Alberta, Canada. - Edmonton : Canadian Forest Service, Natural Resources Canada, Northern Forestry Centre, 2002. - С. 195-200


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

Доп.точки доступа:
Volokitina, Alexandra Vital'yevna; Волокитина, Александра Витальевна; Nazimova, Dina Ivanovna; Назимова, Дина Ивановна; Софронов, Марк Адрианович

    Carbon and water exchanges of regenerating forests in central Siberia
/ M. Meroni, N. Tchebakova // Forest Ecology and Management. - 2002. - Vol. 169, № 1-2. - С. 115-122

Аннотация: Direct measurements of CO2 and water vapour of regenerating forests after fire events (secondary succession stages) are needed to determine the role of such disturbances in the biome carbon and water cycles functioning. An estimation of the extension of burnt areas is also required in order to quantify NBP (net biome productivity), a variable that includes large-scale carbon losses (such as fire) bypassing heterotrophic respiration. Hence, eddy covariance measurements Of CO2 and water vapour were carried out in a natural regenerating forest after a fire event. Measurements were collected continuously over a Betula spp. stand in central Siberia during summer 1999. Minimum carbon exchange rate (NEE, net ecosystem exchange) exceeded -30 mumol m(-2) s(-1) (net flux negative indicating CO2 uptake by vegetation) and the partitioning of the available energy was mostly dominated by latent heat flux. Structure, age and composition of the forest were analysed to understand the secondary succession stages. The results were compared with previous studies on coniferous forests where biospheric exchanges of energy were dominated by sensible heat fluxes and small carbon uptake rates, thus indicating rather limiting growing conditions. A classification of a Landsat-4 Thematic Mapper scene has been carried out to determine the magnitude of burnt areas and the extension of broadleaf regenerating forests. Analysis of burnt areas spatial frequency and carbon exchanges of the regenerating forest stress the importance of considering large area disturbances for full carbon accounting. (C) 2002 Elsevier Science B.V. All rights reserved.

WOS,
Scopus

Держатели документа:
Russian Acad Sci, Siberian Div, Sukachev Isnt Forestry, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Meroni, M. ; Мерони М.; Tchebakova, Nadezhda Mikhailovna; Чебакова, Надежда Михайловна

    Climatic control of stand thinning in unmanaged spruce forests of the southern taiga in European Russia
/ N.N. Vygodskaya, E.-D. Schulze, N.M. Tchebakova et al // Tellus. Series B: Chemical and physical meteorology. - 2002. - Vol. 54B, № 5. - С. 443-461

Аннотация: The demography of Picea abies trees was studied over a period of about 30 yr on permanent plots in six forest types of an unmanaged forest located in a forest reserve of the Southern Taiga, NW of Moscow. This study encompassed a broad range of conditions that are typical for old growth spruce forests in the boreal region, including sites with a high water table and well drained sites, podzolic soils, acidic soils and organic soils. At all sites stand density, tree height, breast height diameter and age has been periodically recorded since 1968. Tree density ranged between 178 and 1035 trees ha(-1) for spruce and between 232 and 1168 trees ha-1 for the whole stand, including mainly Betula and Populus. Biomass ranged between 5.4 and 170 t(dw) ha(-1) for spruce and between 33 to 198 td, ha(-1) for the whole stand. Averaged over a long period of time, biomass did not change with stand density according to the self-thinning rule. in fact, on most sites biomass remained almost constant in the long term, while stand density decreased. The study demonstrates that the loss of living trees was not regulated by competitive interactions between trees, but by disturbances caused by climatic events. Dry years caused losses of minor and younger trees without affecting biomass. In contrast, periodic storms resulted in a loss of biomass without affecting density, except for extreme events, where the whole stand may fall. Dry years followed by wet years enhance the effect on stand density. Since mainly younger trees were lost, the apparent average age of the stand increased more than real time (20% for Picea). Average mortality was 2.8 +/- 0.5% yr(-1) for spruce. Thus, the forest is turned over once every 160-180 yr by disturbances. The demography of dead trees shows that the rate of decay depends on the way the tree died. Storm causes uprooting and stem breakage, where living trees fall to the forest floor and decay with a mean residence time (t(1/2)) of about 16 yr (decomposition rate constant k(d) = 0.042 yr(-1)). This contrasts with trees that die by drought or insect damage, and which remain as standing dead trees with a mean residence time of 3-13 yr until they are brought to ground, mainly by wind. These standing dead trees require an additional mean residence time of about 22 yr for decay on the ground (k(d) = 0.031). In conclusion, we demonstrate that, rather than competitive interactions, it is climate extremes, namely drought, rapid changes of dry years followed by wet years, and storm that determine stand structure, biomass and density, which then affect the net exchange with the atmosphere. The climatic effects are difficult to predict, because the sensitivity of a stand to climate extremes depends on the past history. This may range from no effect, if the stand was recovering from an earlier drought and exhibited a relatively low density, to a total collapse of canopies, if drought reduces stand density to an extent that other climatic extremes (especially wind) may cause further damage.

WOS

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

Доп.точки доступа:
Schulze, E.-D.; Шульце Е-Д; Tchebakova, Nadezhda Mikhailovna; Чебакова, Надежда Михайловна; Выгодская Н.Н.

    A system for heterotrophic soil respiration assessment of Russian land
: материалы временных коллективов / L. V. Mukhortova [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. 86-90. - Библиогр. в конце ст.

Аннотация: A model cluster for soil respiration assessment was developed. It is based on 3592 in-situ measurements and considered climatic parameters, soil and vegetation types, land use, vegetation productivity and disturbances. Heterotrophic efflux from Russian soil was assessed as 3.47 Pg C year or 215 g. C m2 year.

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

Доп.точки доступа:
Mukhortova, Lyudmila Vladimirovna; Мухортова, Людмила Владимировна; Shchepashchenko, D.G.; Щепащенко Д.Г.; Shvidenko, Anatoly Zinov'yevich; Швиденко, Анатолий Зиновьевич; McCallum, I.; МакКаллум И.

    Estimating fire-caused boreal forest disturbances using remote sensing. data
: материалы временных коллективов / O. A. Antamoshkina // 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. 101-104. - Библиогр. в конце ст.

Аннотация: Remote sensing is a time-saving and cost effective method to estimate the current forest condition. This study provides spectral curves characteristic of the underlying surface types common in the area of interest. A methodology of real-time assessment of disturbance levels within separate burned sites is proposed.

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

Доп.точки доступа:
Антамошкина О.А.

    Evaluation of postfire dynamics of ground cover depending on wildfires of varying severity in lower Angara region
: материалы временных коллективов / L. V. Buryak [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. 210-212. - Библиогр. в конце ст.

Аннотация: The paper presents one of results of a complex investigation of forest disturbances dynamics in Lower Angara region. This study estimated influence of fires of varying intensity on the regional conifer forests types depending on forest growing conditions (i.e., forest environment) and analyzed ground cover destruction and regeneration.

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

Доп.точки доступа:
Buryak, L.V.; Буряк Л.В.; Sukhinin, Anatoly Ivanovich; Сухинин, Анатолий Иванович; Ponomarev, Evgeny Ivanovich; Пономарев, Евгений Иванович; Conard, S.G.; Конард С.Г.

    The disturbances of pine-fir stands in Kuznetskii Alatau MTS and Abies sibirica and Pinus sibirica geen pool conservation in culture in vitro
: материалы временных коллективов / E. V. Bazhina, I. N. Tretyakova // 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. 107-109. - Библиогр. в конце ст.

Аннотация: The complex investignation of fir-pine forest in Kuznetskii Alatau Mountains has been shown that in this region damaged forest biocenoses are dominated. The specific character of fir trees damage has been noted. The chemical analysis showd the accumulation in needle of low index biocenosis sulfates and mercury and decrease of zinc maintenance. We believe that complex character of causes of the decline has a regional specific. The plant biotecnologies for mass production genetically improved seedling of Siberian pine and fir for reforestation programs are developed.

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

Доп.точки доступа:
Tretyakova, Iraida Nikolayevna; Третьякова, Ираида Николаевна; Бажина, Елена Васильевна

    Pyrogenic Disturbances of the Hydrothermic Regime of Cryogenic Soils under Light Coniferous Forests in Southeastern Siberia
/ M. D. Evdokimenko // Eurasian Soil Sci. - 2013. - Vol. 46, Is. 2. - P117-126, DOI 10.1134/S106422931302004X. - Cited References: 21 . - 10. - ISSN 1064-2293
РУБ Soil Science

Кл.слова (ненормированные):
Pyrogenic transformation -- taiga -- temperature -- moisture

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.

Полный текст,
WOS,
Scopus

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

Доп.точки доступа:
Evdokimenko, M.D.

    Assessment of the state of soil microbial cenoses in the forest-tundra zone under conditions of airborne industrial pollution
/ A. V. Bogorodskaya [et al.] // Eurasian Soil Sci. - 2012. - Vol. 45, Is. 5. - P521-531, DOI 10.1134/S106422931205002X. - Cited References: 46 . - 11. - ISSN 1064-2293
РУБ Soil Science

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

Полный текст,
Scopus,
WOS

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

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

    The Great Siberian Forest: Challenges and Opportunities of Scale
[Text] / I. M. Danilin, T. R. Crow ; ed. R Lafortezza [et al.] // PATTERNS AND PROCESSES IN FOREST LANDSCAPES: MULTIPLE USE AND SUSTAINABLE MANAGEMENT : SPRINGER, 2008. - IUFRO Landscape Ecology Workshop (SEP, 2006, Locorotondo, ITALY). - P47-66, DOI 10.1007/978-1-4020-8504-8_4. - Cited References: 18 . - 20. - ISBN 978-1-4020-8503-1
РУБ Ecology + Forestry
Рубрики:
CLIMATE-CHANGE

Аннотация: The vastness or scale of the Siberian forest presents both an opportunity and a challenge. It is a major source of softwood fiber in a world in which softwood fiber is in great demand. Its vastness and isolation from markets make it more difficult to regulate harvesting and to get both raw material and processed wood to consumers. Both natural and anthropogenic disturbances (e.g., fire, climate change) greatly alter forest landscapes and complicate the management of the resource for sustainability. We characterize the current condition of the Siberian forest in Russia and recommend future directions for this globally-important resource. The future is promising because Siberia has a relatively well-developed forest infrastructure, along with highly-trained scientists, an existing structure of forest enterprises, and some protective and regulatory measures that serve as a basis for developing and sustaining the resource. However, investments directed at modernization, especially technological, are needed to enhance the country's capacity to promote sustainable development in the forestry sector.

Полный текст,
WOS

Держатели документа:
[Danilin, Igor M.] Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Danilin, I.M.; Crow, T.R.; Lafortezza, R \ed.\; Chen, J \ed.\; Sanesi, G \ed.\; Sane, , G \ed.\

    Disturbance recognition in the boreal forest using radar and Landsat-7
[Text] / K. J. Ranson [et al.] // Can. J. Remote Sens. - 2003. - Vol. 29, Is. 2. - P271-285. - Cited References: 32 . - 15. - ISSN 0703-8992
РУБ Remote Sensing

Аннотация: As part of a Siberian mapping project supported by the National Aeronautics and Space Administration (NASA), this study evaluated the capabilities of radars flown on the European Remote Sensing Satellite (ERS), Japanese Earth Resources Satellite (JERS), and Radarsat spacecraft and an optical sensor enhanced thematic mapper plus (ETM+) on-board Landsat-7 to detect fire scars, logging, and insect damage in the boreal forest. Using images from each sensor individually and combined, an assessment of the utility of using these sensors was developed. Transformed divergence analysis revealed that Landsat ETM+ images were the single best data type for this purpose. However, the combined use of the three radar and optical sensors did improve the results of discriminating these disturbances.

WOS,
Scopus

Держатели документа:
NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
Sci Syst & Applicat Inc, Lanham, MD 20706 USA
Univ Maryland, Dept Geog, College Pk, MD 20742 USA
VN Sukachev Inst Forest, Krasnoyarsk, Russia

Доп.точки доступа:
Ranson, K.J.; Kovacs, K...; Sun, G...; Kharuk, V.I.

    Landsat-7 for evaluation of oilfield exploitation impacts on the south Evenkiya larch dominant communities
[Text] / V. I. Kharuk, K. J. Ranson, S. T. Im ; ed.: AM Larar, Q Tong, Tong, // MULTISPECTRAL AND HYPERSPECTRAL REMOTE SENSING INSTRUMENTS AND APPLICATIONS. Ser. PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) : SPIE-INT SOC OPTICAL ENGINEERING, 2003. - Vol. 4897: Conference on Multispectral and Hyperspectral Remote Sensing Instruments and Applications (OCT 25-27, 2002, HANGZHOU, PEOPLES R CHINA). - P272-278, DOI 10.1117/12.466865. - Cited References: 3 . - 7. - ISBN 0277-786X. - ISBN 0-8194-4683-1
РУБ Geosciences, Multidisciplinary + Instruments & Instrumentation + Remote Sensing + Optics + Physics, Applied

Кл.слова (ненормированные):
Landsat-7 -- oilfields reconnaissance and exploitation -- anthropogenic disturbances -- wildfires -- Siberian taiga

Аннотация: This paper study considers the effects of oil exploration and development in the oilfields of Evenkiya, Central Siberia (60degrees30'N/96degrees30'E). The drilling in this area was initiated in 1970, and the first oil was extracted in 1977. Image data from the US' Landsat - 7, the Russian "Resours", and the European ERS-2 remote sensing satellites were analyzed. The information value of the Landsat-7channels was evaluated. In particular, the fresh oil drilling sites effectively differ from old ones in the third (0.63-0.69 mum) and fourth (0.75-0.90 mum) channels. Recently burned areas are detectable in the middle IR (1.55-1.75, 2.08-2.35 mum). The classification accuracy depends on the number of channels used, but does not improve greatly using more than 4 or 5 channels. Landsat - 7 scenes enable the detection of patterns for parallel strips (5 - 10 in in width) of cut forest, the first sign of the oil reconnaissance. Alongside the direct impacts of oil-exploitation, fire frequency was increased. The "big" fires (area > 200 ha) caused similar to90% of the total damage, but only accounted for 10% of total firescars. The area of human-caused impact is similar to20% of territory, which is similar to2.5 higher than average for known oil development areas within the Landsat scene. The ERS-2 scenes were found to be effective for mapping fresh drilling sites only. The comparative analysis of "Resours" KFA-1000 camera scene (June 1984) and Landsat-7 (October 1999) showed that during this period the number of oilrigs increased nearly 5 times. Generally, the Landsat-7 data are effective for early detection of the anthropogenic impact on the Siberian larch-dominated communities.

WOS,
Scopus

Держатели документа:
Sukachev Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Kharuk, V.I.; Ranson, K.J.; Im, S.T.; Larar, AM \ed.\; Tong, Q \ed.\; Tong, \ed.\

    The carbon balance in natural and disturbed forests of the southern taiga in central Siberia
[Text] / E. F. Vedrova, L. S. Shugalei, V. D. Stakanov // J. Veg. Sci. - 2002. - Vol. 13: IGBP Terrestrial Transects Workshop (JUL 12-16, 1999, DARWIN, AUSTRALIA), Is. 3. - P341-350, DOI 10.1111/j.1654-1103.2002.tb02058.x. - Cited References: 55 . - 10. - ISSN 1100-9233
РУБ Plant Sciences + Ecology + Forestry
Рубрики:
TEMPERATE ZONE
   ECOSYSTEMS

   CYCLE

Кл.слова (ненормированные):
decomposition -- flux -- forest ecosystem -- humification -- mineralization -- primary production -- soil organic matter

Аннотация: We evaluated the balance of production and decomposition in natural ecosystems of Pinus sylvestris, Larix sibirica and Betula pendula in the southern boreal forests of central Siberia. using the Yenisei transect. We also investigated whether anthropogenic disturbances (logging, fire and recreation pressure) influence the carbon budget. Pinus and Larix stands up to age class VI act as a net sink for atmospheric carbon. Mineralization rates in young Betula forests exceed rates of uptake via photosynthesis assimilation. Old-growth stands of all three forest types are CO2 sources to the atmosphere. The prevalence of old-growth Larix in the southern taiga suggests that Larix stands are a net source of CO2. The CO, flux to the atmosphere exceeds the uptake of atmospheric carbon via photosynthesis by 0.23 t C.ha(-1).yr(-1) (47%). Betula and Pinus forests are net sinks, as photosynthesis exceeds respiration by 13% and 16% respectively. The total carbon flux from Pinus, Larix and Betula ecosystems to the atmosphere is 10 387 thousand tons C.yr(-1). Net Primary Production (0.935 t-C.ha(-1)) exceeds carbon release from decomposition of labile and mobile soil organic matter (Rh) by 767 thousand tons C (0.064 t-C.ha(-1)), so that these forests are net C-sinks. The emissions due to decomposition of slash (10 1 thousand tons C; 1.0%) and from fires (0.21%) are very small. The carbon balance of human-disturbed forests is significantly different. A sharp decrease in biomass stored in Pinus and Betula ecosystems leads to decreased production. As a result, the labile organic matterpool decreased by 6-8 times; course plant residues with a low decomposition rate thus dominate this pool. Annual carbon emissions to the atmosphere from these ecosystems are determined primarily by decomposing fresh litterfall. This source comprises 40-79% of the emissions from disturbed forests compared to only 13-28% in undisturbed forests. The ratio of emissions to production (NPP) is 20-30% in disturbed and 52-76% in undisturbed forests.

WOS

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

Доп.точки доступа:
Vedrova, E.F.; Shugalei, L.S.; Stakanov, V.D.

    Analysis of the wood sorption isotherm using the theory of micropore volume filling
[Text] / S. R. Loskutov // Holzforschung. - 2000. - Vol. 54, Is. 3. - P301-304, DOI 10.1515/HF.2000.050. - Cited References: 11 . - 4. - ISSN 0018-3830
РУБ Forestry + Materials Science, Paper & Wood

Кл.слова (ненормированные):
water -- isotherm of sorption -- theory of micropore volume filling

Аннотация: Dubinin's theory of micropore volume filling was used to describe the isotherms of water resorption and desorption by natural wood of twelve species and chemically modified birch wood. The analysis showed that each wood sample is characterized by its own pair of the main equation parameters. The correlation between these parameters was also determined. The resorption/desorption characteristic which is a combination of the main equation parameters of the above mentioned theory was revealed to be invariable for all the studied examples of natural wood. It can be used for estimation of wood substance disturbances caused by chemical modification and probably anthropogenic factors effecting during wood formation. The thermal coefficient as a function of relative vapor pressure was found. This dependence and the main equation of the theory of micropore volume filling can be used to calculate sorption equilibrium for wood/water system under the limited set of experimental data.

WOS,
Scopus

Держатели документа:
RAS, VN Sukachev Inst Forest, Krasnoyarsk, Russia

Доп.точки доступа:
Loskutov, S.R.

    Similar patterns of change in stemwood calcium concentration in red spruce and Siberian fir
[Text] / W. C. Shortle [et al.] // J. Biogeogr. - 1995. - Vol. 22: 1st Global Change and Terrestrial Ecosystems Science Conference (MAY 23-27, 1994, WOODS HOLE, MA), Is. 02.03.2013. - P467-473, DOI 10.2307/2845943. - Cited References: 11 . - 7. - ISSN 0305-0270
РУБ Ecology + Geography, Physical
Рубрики:
ACIDIC DEPOSITION
   TRENDS

   IMPACT

   FOREST

Кл.слова (ненормированные):
dendrochemistry -- forest decline -- environmental markers -- wood cations

Аннотация: Changes in stemwood calcium concentration ([Ca]) for the last 120 years occurred in a common pattern for two sample collections of red spruce (n=33 and 20) from the northeastern United States and for one sample collection of Siberian fir (n=20) from southcentral Siberia, Russia. The [Ca] was measured for wood formed during the periods 1871-90, 1891-1910, 1911-30, 1931-50, 1951-70 and 1971-90. For each core, the relative increase or decrease in [Ca] for adjacent periods of wood formation was recorded. The relative frequency of positive change in [Ca] for each period of wood formation was calculated for the three sample collections. Previous research indicated that under equilibrium conditions, [Ca] in stemwood tended to decrease in more recently formed wood, due to declining numbers of Ca binding sites. Consequently, we expected a low frequency of positive changes in [Ca] in successively formed wood. Consistent with expectation, the relative frequency of positive change from the preceding period to the periods 1891-1910, 1911-30, 1931-50, and 1971-90 were low. Contrary to expectation, the frequency of positive increases in [Ca] more than doubled in 1951-70 compared to 1931-50. The frequency of positive increases in the 1951-70 period relative to the preceding period was 48%, significantly greater than all other periods (P less than or equal to 0.01). The frequencies of positive increases for all other periods were not significantly different from each other (overall mean = 21%, SD = 7). This anomaly in the frequency of positive change in [Ca] in wood formed in 1951-70 relative to wood formed in 1931-50 indicated a perturbation in the ion exchange chemistry of stemwood in two widely separated parts of the northern coniferous forest. This anomaly could be due to external or internal factors. Changes in sap chemistry that affected stemwood chemistry could have been due to changes in the rooting zone. Such changes in rooting zone chemistry could result from the atmospheric deposition of ionic pollutants. Other external factors that could cause the observed anomaly include unusual climatic periods or environmental disturbances such as logging or fire. Internal factors that might produce an anomalously high frequency of positive change of [Ca] include heartwood formation, stemwood infection and a hypersensitive response of the tree against infection.

WOS

Держатели документа:
US FOREST SERV,DURHAM,NH 03824
VV SUKACHEV FOREST INST,KRASNOYARSK 660036,RUSSIA

Доп.точки доступа:
Shortle, W.C.; Smith, K.T.; Minocha, R...; Alexeyev, V.A.

    Response of evapotranspiration and water availability to changing climate and land cover on the Mongolian Plateau during the 21st century
[Text] / Y. L. Liu [et al.] // Glob. Planet. Change. - 2013. - Vol. 108. - P85-99, DOI 10.1016/j.gloplacha.2013.06.008. - Cited References: 134. - This research is supported by the NASA Land Use and Land Cover Change program (NASA-NNX09AI26G, NN-H-04-Z-YS-005-N, and NNX09AM55G), the Department of Energy (DE-FG02-08ER64599), the National Science Foundation (NSF-1028291 and NSF-0919331), and the NSF Carbon and Water in the Earth Program (NSF-0630319). The computing is supported by the Rosen Center of High Performance Computing at Purdue University. Special acknowledgment is made here to Prof. Eric Wood of Princeton University for his generous provision of ET dataset in the Vinukollu et al. (2011). Diego Miralles acknowledges the support by the European Space Agency WACMOS-ET project (contract no.4000106711/12/I-NB). . - 15. - ISSN 0921-8181
РУБ Geography, Physical + Geosciences, Multidisciplinary

Аннотация: Adequate quantification of evapotranspiration (ET) is crucial to assess how climate change and land cover change (LCC) interact with the hydrological cycle of terrestrial ecosystems. The Mongolian Plateau plays a unique role in the global climate system due to its ecological vulnerability, high sensitivity to climate change and disturbances, and limited water resources. Here, we used a version of the Terrestrial Ecosystem Model that has been modified to use Penman-Monteith (PM) based algorithms to calculate ET. Comparison of site-level ET estimates from the modified model with ET measured at eddy covariance (EC) sites showed better agreement than ET estimates from the MODIS ET product, which overestimates ET during the winter months. The modified model was then used to simulate ET during the 21st century under six climate change scenarios by excluding/including climate-induced LCC. We found that regional annual ET varies from 188 to 286 mm yr(-1) across all scenarios, and that it increases between 0.11 mm yr(-2) and 0.55 mm yr(-2) during the 21st century. A spatial gradient of ET that increases from the southwest to the northeast is consistent in all scenarios. Regional ET in grasslands, boreal forests and semi-desert/deserts ranges from 242 to 374 mm yr(-1), 213 to 278 mm yr(-1) and 100 to 199 mm yr(-1), respectively; and the degree of the ET increase follows the order of grassland, semi-desert/desert, and boreal forest. Across the plateau, climate-induced LCC does not lead to a substantial change (<5%) in ET relative to a static land cover, suggesting that climate change is more important than LCC in determining regional ET. Furthermore, the differences between precipitation and ET suggest that the available water for human use (water availability) on the plateau will not change significantly during the 21st century. However, more water is available and less area is threatened by water shortage in the Business-As-Usual emission scenarios relative to level-one stabilization emission scenarios. (C) 2013 Elsevier B.V. All rights reserved.

Полный текст,
WOS,
Scopus

Держатели документа:
[Liu, Yaling
Zhuang, Qianlai
Chen, Min
He, Yujie] Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA
[Zhuang, Qianlai
Bowling, Laura] Purdue Univ, Dept Agron, W Lafayette, IN 47907 USA
[Pan, Zhihua] China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China
[Pan, Zhihua] Minist Agr, Key Ecol & Environm Expt Stn Field Sci Observat H, Inner Mongolia 011705, Peoples R China
[Tchebakova, Nadja
Parfenova, Elena] Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
[Sokolov, Andrei] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA
[Kicklighter, David
Melillo, Jerry] Marine Biol Lab, Ctr Ecosyst, Woods Hole, MA 02543 USA
[Sirin, Andrey] Russian Acad Sci, Inst Forest Sci, Lab Peatland Forestry & Ameliorat, Uspenskoye 143030, Moscow Oblast, Russia
[Zhou, Guangsheng] Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China
[Chen, Jiquan] Univ Toledo, Dept Environm Sci, Toledo, OH 43606 USA
[Miralles, Diego] Univ Bristol, Sch Geog Sci, Bristol, Avon, England

Доп.точки доступа:
Liu, Y.L.; Zhuang, Q.L.; Chen, M...; Pan, Z.H.; Tchebakova, N...; Sokolov, A...; Kicklighter, D...; Melillo, J...; Sirin, A...; Zhou, G.S.; He, Y.J.; Chen, J.Q.; Bowling, L...; Miralles, D...; Parfenova, E...; NASA [NASA-NNX09AI26G, NN-H-04-Z-YS-005-N, NNX09AM55G]; Department of Energy [DE-FG02-08ER64599]; National Science Foundation [NSF-1028291, NSF-0919331, NSF-0630319]; European Space Agency WACMOS-ET project [4000106711/12/I-NB]

    Productivity of forests in the Eurosiberian boreal region and their potential to act as a carbon sink - a synthesis
[Text] / E. D. Schulze [et al.] // Glob. Change Biol. - 1999. - Vol. 5, Is. 6. - P703-722, DOI 10.1046/j.1365-2486.1999.00266.x. - Cited References: 93 . - 20. - ISSN 1354-1013
РУБ Biodiversity Conservation + Ecology + Environmental Sciences

Аннотация: Based on review and original data, this synthesis investigates carbon pools and fluxes of Siberian and European forests (600 and 300 million ha, respectively). We examine the productivity of ecosystems, expressed as positive rate when the amount of carbon in the ecosystem increases, while (following micrometeorological convention) downward fluxes from the atmosphere to the vegetation (NEE=Net Ecosystem Exchange) are expressed as negative numbers. Productivity parameters are Net Primary Productivity (NPP=whole plant growth), Net Ecosystem Productivity (NEP = CO2 assimilation minus ecosystem respiration), and Net Biome Productivity (NBP=NEP minus carbon losses through disturbances bypassing respiration, e.g. by fire and logging). Based on chronosequence studies and national forestry statistics we estimate a low average NPP for boreal forests in Siberia: 123 gC m(-2) y(-1). This contrasts with a similar calculation for Europe which suggests a much higher average NPP of 460 gC m(-2) y(-1) for the forests there. Despite a smaller area, European forests have a higher total NPP than Siberia (1.2-1.6 vs. 0.6-0.9 x 10(15) gC region(-1) y(-1)). This arises as a consequence of differences in growing season length, climate and nutrition. For a chronosequence of Pinus sylvestris stands studied in central Siberia during summer, NEE was most negative in a 67-y old stand regenerating after fire (-192 mmol m(-2) d(-1)) which is close to NEE in a cultivated forest of Germany (-210 mmol m(-2) d(-1)). Considerable net ecosystem CO2-uptake was also measured in Siberia in 200- and 215-y old stands (NEE:174 and - 63 mmol m(-2) d(-1)) while NEP of 7- and 13-y old logging areas were close to the ecosystem compensation point. Two Siberian bogs and a bog in European Russia were also significant carbon sinks (-102 to - 104 mmol m(-2) d(-1)). Integrated over a growing season (June to September) we measured a total growing season NEE of -14 mol m(-2) summer(-1) (-168 gC m(-2) summer(-1)) in a 200-y Siberian pine stand and -5 mol m(-2) summer(-1) (-60 gC m(-2) summer(-1)) in Siberian and European Russian bogs. By contrast, over the same period, a spruce forest in European Russia was a carbon source to the atmosphere of (NEE: + 7 mol m(-2) summer(-1) = + 84 gC m(-2) summer(-1)). Two years after a windthrow in European Russia, with all trees being uplifted and few successional species, lost 16 mol C m(-2) to the atmosphere over a 3-month in summer, compared to the cumulative NEE over a growing season in a German forest of -15.5 mol m(-2) summer(-1) (-186 gC m(-2) summer(-1); European flux network annual averaged - 205 gC m(-2) y(-1)). Differences in CO2-exchange rates coincided with differences in the Bowen ratio, with logging areas partitioning most incoming radiation into sensible heat whereas bogs partitioned most into evaporation (latent heat). Effects of these different surface energy exchanges on local climate (convective storms and fires) and comparisons with the Canadian BOREAS experiment are discussed. Following a classification of disturbances and their effects on ecosystem carbon balances, fire and logging are discussed as the main processes causing carbon losses that bypass heterotrophic respiration in Siberia. Following two approaches, NBP was estimated to be only about 13-16 mmol m(-2) y(-1) for Siberia. It may reach 67 mmol m(-2) y(-1) in North America, and about 140-400 mmol m(-2) y(-1) in Scandinavia. We conclude that fire speeds up the carbon cycle, but that it results also in long-term carbon sequestration by charcoal formation. For at least 14 years after logging, regrowth forests remain net sources of CO2 to the atmosphere. This has important implications regarding the effects of Siberian forest management on atmospheric concentrations. For many years after logging has taken place, regrowth forests remain weaker sinks for atmospheric CO2 than are nearby old-growth forests.

Полный текст,
WOS,
Scopus

Держатели документа:
Max Planck Inst Biogeochem, D-07701 Jena, Germany
Landcare Res, Lincoln, New Zealand
Russian Acad Sci, Inst Evolut & Ecol, Moscow 117071, Russia
Univ Tubingen, Inst Bot, D-72076 Tubingen, Germany
Comenius Univ, Dept Biophys & Chem Phys, Bratislava 84215, Slovakia
Univ Tuscia, Dept Forest Sci & Environm, I-01100 Viterbo, Italy
Moscow MV Lomonosov State Univ, Ecol Travel Ctr, Moscow 119899, Russia
Russian Acad Sci, Siberian Branch, Forest Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Schulze, E.D.; Lloyd, J...; Kelliher, F.M.; Wirth, C...; Rebmann, C...; Luhker, B...; Mund, M...; Knohl, A...; Milyukova, I.M.; Schulze, W...; Ziegler, W...; Varlagin, A.B.; Sogachev, A.F.; Valentini, R...; Dore, S...; Grigoriev, S...; Kolle, O...; Panfyorov, M.I.; Tchebakova, N...; Vygodskaya, N.N.

    A computer system for evaluating and predicting hurricane impact on forest
[Text] / F. I. Pleshikov [et al.] // Saf. Sci. - 1998. - Vol. 30, Is. 01.02.2013. - P3-8, DOI 10.1016/S0925-7535(98)00028-9. - Cited References: 13 . - 6. - ISSN 0925-7535
РУБ Engineering, Industrial + Operations Research & Management Science

Аннотация: A computer system for evaluating current forest state and predicting stand resistance to strong wind was tested in a case study of pine stands in the southern part of Central Siberia disturbed by a hurricane in 1994. The use of a local geographical information system (GIS) enabled determination of a combination of natural and human factors that increase the risk of windthrow. The factors were analyzed at three levels: landscape, stand, and single toe. Specific site conditions and human-caused disturbances of the natural vegetation community structure were found to be the major factors accounting for decreasing stand resistance to wind. (C) 1998 Elsevier Science Ltd. All rights reserved.

Полный текст,
WOS,
Scopus

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

Доп.точки доступа:
Pleshikov, F.I.; Ryzkova, V.A.; Kaplunov, V.Y.; Usoltseva, J.V.

    CHANGE IN PHYTOMASS AND NET PRIMARY PRODUCTIVITY FOR SIBERIA FROM THE MIDHOLOCENE TO THE PRESENT
[Text] / R. A. MONSERUD [et al.] // Glob. Biogeochem. Cycle. - 1995. - Vol. 9, Is. 2. - P213-226, DOI 10.1029/95GB00596. - Cited References: 73 . - 14. - ISSN 0886-6236
РУБ Environmental Sciences + Geosciences, Multidisciplinary + Meteorology & Atmospheric Sciences

Аннотация: Phytomass (live plant mass) and net primary productivity are major components of the terrestrial carbon balance. A major location for phytomass storage is the subcontinent of Siberia, which is dominated by extensive reaches of taiga (boreal forest). The responsiveness of the phytomass component of the carbon pool is examined by comparing vegetation in the mid-Holocene (4600-6000 years before present) to modern potential vegetation. The mid-Holocene was warmer and moister in middle and northern Siberia than today, producing conditions ideal for boreal forest growth. As a result, both northern and middle taiga were dominated by shade-tolerant dark-needled species that thrive in moist climates. Today, shade-tolerant dark-needled taiga is restricted to western Siberia and the highlands of central Siberia, with its central and eastern components in the mid-Holocene replaced today by light-demanding light-needled species with lower productivity and phytomass. Total phytomass in Siberia in the mid-Holocene was 105.0 +/- 3.1 Pg, compared to 85.9 +/- 3.2 Pg in modern times, a loss of 19.1 +/- 3.1 Pg of phytomass. The reduction in dark-needled northern and middle taiga classes results in a loss of 28.8 Pg, while the expansion of the corresponding light-needled taiga results in a gain of 13.5 Pg, a net loss of 15.3 Pg. The loss is actually greater, because the modern figures are for potential vegetation and not adjusted for agriculture and other anthropogenic disturbances. Given long periods for vegetation to approach equilibrium with climate, the phytomass component of the carbon pool is responsive to climate change. Changes in net primary productivity (NPP) for Siberia between the mid-Holocene and the present were not as large as changes in phytomass. A minor decrease in NPP (0.6 Pg yr(-1), 10%) has occurred under our cooler modern climate, primarily due to the shift from dark-needled taiga in the mid-Holocene to light-needled taiga today.

Полный текст,
WOS

Держатели документа:
MOSCOW MV LOMONOSOV STATE UNIV,DEPT GEOG,MOSCOW,RUSSIA
OREGON STATE UNIV,DEPT CIVIL ENGN,CORVALLIS,OR 97331
RUSSIAN ACAD SCI,INST FOREST,SIBERIAN BRANCH,KRASNOYARSK,RUSSIA

Доп.точки доступа:
MONSERUD, R.A.; DENISSENKO, O.V.; KOLCHUGINA, T.P.; TCHEBAKOVA, N.M.

    Assessment and monitoring of Siberian forest resources in the framework of the EU-Russia ZAPAS project
/ C. Huttich [et al.] // International Geoscience and Remote Sensing Symposium (IGARSS). - 2012. - 2012 32nd IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2012 (22 July 2012 through 27 July 2012, Munich) Conference code: 95192. - Ст. 6351999. - P7208-7211DOI 10.1109/IGARSS.2012.6351999 . -
Аннотация: ZAPAS investigates and cross validates methodologies using both Russian and European Earth observation data to develop procedures and products for forest resource assessment and monitoring. Products include biomass change maps for the years 2007 to 2009 on a local scale, a biomass and improved land cover map on the regional scale as input to a carbon accounting model. The geographical focus of research and development is Central Siberia, which contains two administrative districts of Russia, namely Krasnoyarsk Kray and Irkutsk Oblast. The results of the terrestrial ecosystem full carbon accounting are addressed to the Federal Forest Agency as federal instance. The high resolution products comprise biomass and change maps for selected local sites. These products are addressed to support the UN FAO Forest Resources Assessment as well as the requirements of the local forest inventories. В© 2012 IEEE.

Scopus

Держатели документа:
Dept. for Earth Observation, University Jena, Germany
Space Research Institute, Moscow, Russian Federation
Joint Stock Company Russian Space Systems, Moscow, Russian Federation
Sukachev Institute of Forest, Krasnoyarsk, Russian Federation
International Institute for Applied System Analysis, Laxenburg, Austria

Доп.точки доступа:
Huttich, C.; Schmullius, C.C.; Thiel, C.J.; Bartalev, S.; Emelyanov, K.; Korets, M.; Shvidenko, A.; Schepaschenko, D.