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

: материалы временных коллективов / O. A. Zyryanova, T. N. Bugayenko, N. N. Bugayenko, Y. Matsuura // Proceedings of the seventh symposium on the joint Siberian permafrost studies between Japan and Russia in 1998 : Hokkaido University, 1999. - С. 59-66. - Библиогр. в конце ст.
Аннотация: In 3-4 years after the fire the number of the vascular plants is 1:2-1.3 times more as compared to that of radial larch association. Both the appearance of the new plant species and their families as well as the restitution on beforefire plants are responsible for the high level of species diversity on the initial stages of progressive successions. Temporal and spatial structure of the radical larch community is destroyed in two years after the fire.

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

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Bugayenko, Tat'yana Nikolayevna; Бугаенко, Татьяна Николаевна; Bugayenko, N.N.; Бугаенко Н.Н.; Matsuura, Y.; Матсуура У.; Зырянова Ольга Александровна
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РСФ (06.06.2003г. Инв.б.н - бесплатно) (свободен)

/ O. Shibistova et al, S. Efgrafova, G. Zrazhevskaya // Tellus. Series B: Chemical and physical meteorology. - 2002. - Vol. 54B, № 5. - С. 552-567
Аннотация: Rates of CO2 efflux from the floor of a central Siberian Scots pine (Pinus sylvestris) forest were measured using a dynamic closed chamber system and by a eddy covariance system placed 2.5 m above the forest floor. Measurements were undertaken for a full growing season: from early May to early October 1999. Spatial variability as determined by the chamber measurements showed the rate of CO2 efflux to depend on location, with rates from relatively open areas ("glades") only being about 50% those observed below or around trees. This was despite generally higher temperatures in the glade during the day. A strong relationship between CO2 efflux rate and root density was observed in early spring, suggesting that lower rates in open areas may have been attributable to fewer roots there. Continuous measurements with the eddy covariance system provided good temporal coverage. This method, however, provided estimates of ground CO2 efflux rate rates that were about 50% lower than chamber measurements that were undertaken in areas considered to be representative of the forest as a whole. An examination of the seasonal pattern of soil CO2 efflux rates suggests that much of the variability in CO2 efflux rate could be accounted for by variations in soil temperature. Nevertheless, there were also some indications that the soil water deficits served to reduce soil CO2 efflux rates during mid-summer. Overall the sensitivity of CO2 efflux rate to temperature seems to be greater for this boreal ecosystem than has been the case for most other studies.

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

Доп.точки доступа:
Shibistova, Olga Borisovna; Шибистова, Ольга Борисовна; Yevgrafova, Svetlana Yur'yevna; Евграфова, Светлана Юрьевна; Zrazhevskaya, Galina Kirillovna; Зражевская, Галина Кирилловна

: материалы временных коллективов / A. S. Prokushkin [и др.] // Canadian Journal of Forest Research. - 2005. - Vol. 35, № : 9. - С. 2130-2140
Аннотация: Fluxes of dissolved organic carbon (DOC) in forested watersheds underlain by permafrost are likely to vary with changes in climatic regime that increase soil moisture and temperature. It was examined the effects of temporal and spatial variations in soil temperature and moisture on DOC fluxes from the forest floor contrasting north- and south-facing slopes in central Siberia.

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

Доп.точки доступа:
Prokushkin, Anatoly Stanislavovich; Прокушкин, Анатолий Станиславович; Kajimoto, T.; Каджимото Т; Prokushkin, Staniclav Grigor'evich; Прокушкин Станислав Григорьевич; McDowell, W.H.; Макдоуелл В.Х.; Abaimov, Anatoly Platonovich; Абаимов Анатолий Платонович; Matsuura, Y.; Матсуура У.

: материалы временных коллективов / D. J. McRae [и др.] // Canadian Journal of Forest Research. - 2005. - Vol. 35, № : 9. - С. 2194-2206
Аннотация: Spatial and temporal variability in forest fire behavior, caused by differences in microsites, fuel types and condition, topography, and other factors across even relatively small areas, has been poorly characterized in most previous studies. We report documentation and analysis of fire behavior for several experimental fires using a camcorder-sized infrared camera mounted in a helicopter hovering over the target fires. These fires were conducted as part of the Russian FIRE BEAR Project in boreal Pinus sylvestris L. forests of central Siberia. Final results provide quantitative information on fire front location, rates of speed, temperatures, and total radiation energy (kW/m2) observed during the fires at resolutions from 2.5 to 1.0 m across experimental burn plots ranging from 2.3 to 4.0 ha. This method allows the sample size to be quite large, so that statistical analysis of the fire behavior data can provide an associated level of confodence.

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

Доп.точки доступа:
McRae, D.J.; Макрае Д.Дж.; Jin, J.-Z.; Джин Дж -З.; Conard, S.G.; Конард С.Г.; Sukhinin, Anatoly Ivanovich; Сухинин, Анатолий Иванович; Ivanova, Galina Alexandrovna; Иванова, Галина Александровна; Blake, T.W.; Блэйк Т.В.

: материалы временных коллективов / O. A. Zyryanova, V. I. Zyryanov et al // Eurasian Journal of Forest Research. - 2007. - Vol. 10-1. - С. 19-29. - Библиогр. в конце ст.
Аннотация: Larix gmelini is one of the most widespread larch species in northern Eurasia as a whole and in the Rissian Federation dominating here in both the distribution area and the growing stock. Owing to high adaptability and ecological plasticity it occupies different sites within its range and performs well under continuous permafrost conditions. Over an immense area Gmelin larch forests differ in species composition, ecosystem sytucture and the features of natural regeneration. Ground fires are the main force driving larch forest development. Depending upon site conditions, fire intensity and periodicity, fire regimes determine forest age structure, species diversity, spatial-temporal dimensions of larch ecosystems as well- as succession patterns in their trends and rates. Based on the results of long-term investigatiobs we discuss Gmelin larch forest post-fire dynamics in the central part of their distribution in Siberia versus the southeastern part in Priamurye in the Rissian Far East.

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

Доп.точки доступа:
Zyryanova, Olga Alexandrovna; Зырянова Ольга Александровна; Zyryanov, Vladimir Ivanovich; Зырянов, Владимир Иванович
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: absracts / S. T. Im // Enviromis. International conference on enviromental observations, modelling and information systems, Tomsk, Russia, July 1-8, 2006: program and abstracts. - 2006. - С. 91
Аннотация: Aim of the research is to analyze applicability of SPOT Vegetation data in estimation of spatial-temporal dynamics of Siberian silkmoth outbreak (by example of outbreak which took place in mountain taiga forest of Krasnoyarskii krai and Irkutskaya oblast, 1998-2004).

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

Доп.точки доступа:
Им, Сергей Тхекдеевич
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РСФ (12.03.2008г. (1 экз.) - Б.ц.) - свободны 1

= Geographic conditionality of wildfires and estimition of damages of forests of Central Siberia : материалы временных коллективов / E. I. Ponomarev // Lesne Prace Badawcze (Forest Research Papers). - Vol. 69, № 2. - С. 109-115
Аннотация: This database of forest wildfires that occurred in Central Siberia in the years 2006 and 2007 was created on the basis of satellite image analysis. The database allowed to construct an up-to-date map of fire hazards and depict the geographic distribution of forest and non-forest fires during fire season. The duration of the active burning phase for the majority (88%) of forests in the region was 1 day. The spatial-temporal distribution of forest fires indicates a maximum fire risk at the end of June and the begining of July and in southern regions - also in spring and autumn. The analysis of images with depicting damage to forestland allows to state that c.30-40% are the stands with different stands with different degree of damage of which less than c. 30% show weak signs of recovery.

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

Доп.точки доступа:
Пономарев, Евгений Иванович

: материалы временных коллективов / M. A. Korets [и др.] // Environmental change in Siberia: earth observation, field studies and modelling. - Dordrecht et. al. : Springer, 2010. - С. 3-19. - Библиогр. в конце ст.
Аннотация: Envisat-MERIS and SPOT Vegetation satelitte data were tested for estimation of vegetation cover disturbance caused by fire and industrial pollution in central and northern Siberia test sites, respectively. MERIS data were used to assess forest disturbance levels on burned sites in Angara region. Chlorophyll indexes (REP and MTCI) were found to allow identifying up to five forest disturbance levels due to high space-borne sensor resolution and sensitivity to chlorophyll content of vegetation. The current vegetation condition was assessed using MTCI index in the northern (Norilsk) test region. The lowest index values calculated for the most severely disturbed vegetation near Norilsk were found to correlate with sulphur concentrations in larch and spruce needles. Another approach to estimating spatial and temporal trends of vegetation condition used the 1998-2005 SPOT-Vegetation satellite data. The relationships obtained between MTCI, NDVI values, and forest mortality were based upon to map the 1998-2005 forest degradation zone dynamics in the northern test site.

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

Доп.точки доступа:
Korets, Mikhail Anatol'yevich; Корец, Михаил Анатольевич; Ryzhkova, Vera Alexandrovna; Рыжкова, Вера Александровна; Danilova, Irina Valer'yevna; Данилова, Ирина Валерьевна; Sukhinin, Anatoly Ivanovich; Сухинин, Анатолий Иванович; Bartalev, S.A.; Барталев С.А.

: материалы временных коллективов / E. N. Pal'nikova, V. Gr. Soukhovolsky // 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. 160-161. - Библиогр. в конце ст.
Аннотация: Synchronization of forest insects population dynamics has been studied. Cross-correlation function and coherence function of different types of forest insects at various test plots were culculated using the Statistica 6.0 program. Analysis of the statistical reability of the culculated performance was held, the dependence of the level of synchronization of population dynamics on the ecological properties of species and landscape characteristrics of plots were studied.

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

Доп.точки доступа:
Soukhovolsky, Vladislav Grigor'yevich; Суховольский, Владислав Григорьевич; Пальникова, Елена Николаевна

: материалы временных коллективов / A. V. Panov [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. 333-337. - Библиогр. в конце ст.
Аннотация: Siberia is currenly poorly represented in the system of global atmospheric observations. The lack of surface-based observations concerns the properties of atmospheric aerosol particles especially with respect to potential climate change. Here we report the first statistical analysis of the four years data observations at the ZOTTO observatory in Central Siberia aimed to assess the representative integral particle, seasonal variations of the aerosol, and possible sources of aerosol over the large Siberian forest area.

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

Доп.точки доступа:
Panov, Alexey Vasil'yevich; Панов, Алексей Васильевич; Heintzenberg, J.; Хейценберг Дж.; Birmili, W.; Бирмили В.; Otto, R.; Отто Р.; Andreae, M.; Андреэ М.

[Текст] = Temporal variability of atmospheric CO2 over of Middle Taiga ecosystems of Central Siberia : материалы временных коллективов / А. В. Тимохина // Исследование компонентов лесных экосистем Сибири: Материалы конференции молодых ученых, 5-6 апреля 2012 г. , Красноярск. - Красноярск : Институт леса им. В.Н. Сукачева СО РАН , 2012. - Вып. 13. - С. 61-63. - Библиогр. в конце ст.
Аннотация: The study is based on data of ZOTTO tall tower obtained during 2009-2012 years. The linear trend of atmospheric CO2 from May 1 of 2009 to March 29 of 2012 about 2.96 ppm/year was estimated.

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

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Timokhina Anastasiya Vladimirovna

/ J. . Krepkowski [et al.] // New Phytol. - 2013. - Vol. 199, Is. 2. - P431-440, DOI 10.1111/nph.12266. - Cited References: 56. - We are indebted to the German Research Foundation for funding this project (BR 1895/15). We are grateful to the two anonymous reviewers for their constructive comments, which helped us to improve the quality of the paper. . - 10. - ISSN 0028-646XРУБ Plant Sciences

Аннотация: We present an intra-annual stable carbon isotope (13C) study based on a labeling experiment to illustrate differences in temporal patterns of recent carbon allocation to wood structures of two functional types of trees, Podocarpus falcatus (a late-successional evergreen conifer) and Croton macrostachyus (a deciduous broadleaved pioneer tree), in a tropical mountain forest in Ethiopia. Dendrometer data, wood anatomical thin sections, and intra-annual 13C analyses were applied. Isotope data revealed a clear annual growth pattern in both studied species. For P.falcatus, it was possible to synchronize annual 13C peaks, wood anatomical structures and monthly precipitation patterns. The labeling signature was evident for three consecutive years. For C.macrostachyus, isotope data illustrate a rapid decline of the labeling signal within half a year. Our 13C labeling study indicates a distinct difference in carryover effects between trees of different functional types. A proportion of the labeled 13C is stored in reserves of wood parenchyma for up to 3yr in P.falcatus. By contrast, C.macrostachyus shows a high turnover of assimilates and a carbon carryover effect is only detectable in the subsequent year.

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Держатели документа:
[Krepkowski, Julia
Braeuning, Achim] Univ Erlangen Nurnberg, Inst Geog, D-91054 Erlangen, Germany
[Gebrekirstos, Aster] World Agroforestry Ctr, Nairobi, Kenya
[Shibistova, Olga] Leibniz Univ Hannover, Inst Soil Sci, D-30419 Hannover, Germany
[Shibistova, Olga] Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia

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Krepkowski, J...; Gebrekirstos, A...; Shibistova, O...; Brauning, A...

/ V. I. Kharuk [et al.] // For. Ecol. Manage. - 2013. - Vol. 289. - P385-392, DOI 10.1016/j.foreco.2012.10.024. - Cited References: 40. - This research was supported by the SB RAS Program No. 30.3.33, and NASA Science Mission Directorate, Terrestrial Ecology Program. The authors thank Dr. Joanne Howl for editing the manuscript. . - 8. - ISSN 0378-1127РУБ Forestry

Аннотация: The Trans-Baikal (or Zabailkal'e) region includes the forest-steppe ecotones south and east of Lake Baikal in Russia and has experienced drought for several years. The decline and mortality of birch (Betula pendula) stands within the forest-steppe ecotone Trans-Baikal region was studied based on a temporal series of satellite data, ground measurements, and tree ring analysis. During the first decade of the 21st century birch stands decline and mortality were observed on about 5% of the total area of stands within our 1250 km(2) study area. Birch forest decline and mortality occurs mainly at the margins of stands, within the forest-steppe ecotone on slopes with direct insolation. During the first decade of the 21st century summer (June-August) precipitation was about 25% below normal. Soil water content measurements were lowest within dead stands and highest within healthy stands and intermediate within damaged stands. Drought impact on stands was amplified by an increase in summer air temperatures (+0.9 degrees C) in comparison with the previous decade. Tree ring data of "surviving" and "dead" tree groups showed a positive correlation with summer/annual precipitation and negative correlation with summer air temperatures. Temperature and precipitation extreme anomalies tend to occur in the region with a period of about 27 years. The observed anomaly was the most severe since the beginning of meteorological observations in the year 1900. Data for the other sites showed a positive climate impact on the growth and expansion of Siberian forests. That is, the same species (B. pendula) showed considerable increase (1.4 times both in height and stem volume) during 20th-21st centuries as temperature increased but precipitation remained at adequate levels. (C) 2012 Elsevier B.V. All rights reserved.

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Держатели документа:
[Kharuk, V. I.
Oskorbin, P. A.
Im, S. T.
Dvinskaya, M. L.] VN Sukachev Inst Forest, Krasnoyarsk, Russia
[Kharuk, V. I.
Oskorbin, P. A.
Im, S. T.
Dvinskaya, M. L.] Siberian Fed Univ, Krasnoyarsk, Russia
[Ranson, K. J.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

Доп.точки доступа:
Kharuk, V.I.; Ranson, K.J.; Oskorbin, P.A.; Im, S.T.; Dvinskaya, M.L.

/ O. . Shibistova [et al.] // PLoS One. - 2012. - Vol. 7, Is. 9. - Ст. e45540, DOI 10.1371/journal.pone.0045540. - Cited References: 87. - Financial support was given by the German Research Foundation (to G. G., DFG Gu 406/19-1). The funding agency had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. . - 11. - ISSN 1932-6203РУБ Multidisciplinary Sciences

Аннотация: Background: Anthropogenic disturbance of old-growth tropical forests increases the abundance of early successional tree species at the cost of late successional ones. Quantifying differences in terms of carbon allocation and the proportion of recently fixed carbon in soil CO2 efflux is crucial for addressing the carbon footprint of creeping degradation. Methodology: We compared the carbon allocation pattern of the late successional gymnosperm Podocarpus falcatus (Thunb.) Mirb. and the early successional (gap filling) angiosperm Croton macrostachyus Hochst. es Del. in an Ethiopian Afromontane forest by whole tree (CO2)-C-13 pulse labeling. Over a one-year period we monitored the temporal resolution of the label in the foliage, the phloem sap, the arbuscular mycorrhiza, and in soil-derived CO2. Further, we quantified the overall losses of assimilated C-13 with soil CO2 efflux. Principal Findings: C-13 in leaves of C. macrostachyus declined more rapidly with a larger size of a fast pool (64% vs. 50% of the assimilated carbon), having a shorter mean residence time (14 h vs. 55 h) as in leaves of P. falcatus. Phloem sap velocity was about 4 times higher for C. macrostachyus. Likewise, the label appeared earlier in the arbuscular mycorrhiza of C. macrostachyus and in the soil CO2 efflux as in case of P. falcatus (24 h vs. 72 h). Within one year soil CO2 efflux amounted to a loss of 32% of assimilated carbon for the gap filling tree and to 15% for the late successional one. Conclusions: Our results showed clear differences in carbon allocation patterns between tree species, although we caution that this experiment was unreplicated. A shift in tree species composition of tropical montane forests (e. g., by degradation) accelerates carbon allocation belowground and increases respiratory carbon losses by the autotrophic community. If ongoing disturbance keeps early successional species in dominance, the larger allocation to fast cycling compartments may deplete soil organic carbon in the long run.

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Держатели документа:
[Shibistova, Olga
Yohannes, Yonas
Boy, Jens
Guggenberger, Georg] Leibniz Univ Hannover, Inst Soil Sci, Hannover, Germany
[Shibistova, Olga] Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk, Russia
[Yohannes, Yonas] Ethiopian Inst Agr Res, Addis Ababa, Ethiopia
[Richter, Andreas
Wild, Birgit
Watzka, Margarethe] Univ Vienna, Dept Chem Ecol & Ecosyst Res, Vienna, Austria

Доп.точки доступа:
Shibistova, O...; Yohannes, Y...; Boy, J...; Richter, A...; Wild, B...; Watzka, M...; Guggenberger, G...

[Text] / A. S. Prokushkin [et al.] // Environ. Res. Lett. - 2011. - Vol. 6, Is. 4. - Ст. 45212, DOI 10.1088/1748-9326/6/4/045212. - Cited References: 63. - This work was supported by the joint US-Russia program between the RFBR and CRDF through grants 10-05-92513 and RUG1-2980-KR-10. Additional support was provided by joint Russian-French Programmes EC2CO, Environement Cotier PNEC and GDRI CAR-WET-SIB, ANR 'Arctic metals' and grant 11.G34.31.0014 of Russian Ministry of higher education and science. We greatly thank Sergey Tenishev for assistance with sample collection during harsh winter and spring periods, and Vladimir Ivanov who provided invaluable daily discharge data for the Nizhnyaya Tunguska and Tembenchi Rivers. We thank three anonymous reviewers for their fruitful and constructive comments that allowed improving greatly the quality of presentation. . - 14. - ISSN 1748-9326РУБ Environmental Sciences + Meteorology & Atmospheric Sciences

Аннотация: Frequent measurements of dissolved organic (DOC) and inorganic (DIC) carbon concentrations in rivers during snowmelt, the entire ice-free season, and winter were made in five large watersheds (15 000-174 000 km(2)) of the Central Siberian Plateau (Yenisey River basin). These differ in the degree of continuous permafrost coverage, mean annual air temperature, and the proportion of tundra and forest vegetation. With an annual DOC export from the catchment areas of 2.8-4.7 gC m(-2) as compared to an annual DIC export of 1.0-2.8 gC m(-2), DOC was the dominant component of terrigenous C released to rivers. There was strong temporal variation in the discharge of DOC and DIC. Like for other rivers of the pan-arctic and boreal zones, snowmelt dominated annual fluxes, being 55-71% for water runoff, 64-82% for DOC and 37-41% for DIC. Likewise, DOC and DIC exhibited also a strong spatial variation in C fluxes, with both dissolved C species decreasing from south to north. The rivers of the southern part of the plateau had the largest flow-weighted DOC concentrations among those previously reported for Siberian rivers, but the smallest flow-weighted DIC concentrations. In the study area, DOC and DIC fluxes were negatively correlated with the distribution of continuous permafrost and positively correlated with mean annual air temperature. A synthesis of literature data shows similar trends from west to east, with an eastward decrease of dissolved C concentrations and an increased proportion of DOC in the total dissolved C flux. It appears that there are two contemporary limitations for river export of terrigenous C across Siberia: (1) low productivity of ecosystems with respect to potentially mobilizable organic C, slow weathering rates with concomitant small formation of bicarbonate, and/or wildfire disturbance limit the pools of organic and inorganic C that can be mobilized for transport in rivers (source-limited), and (2) mobilization of available pools of C is constrained by low precipitation in the severe continental climate of interior Siberia (transport-limited). Climate warming may reduce the source limitation by enhancing primary production and weathering rates, while causes leading to surmounting the transport limitation remain debatable due to uncertainties in predictions of precipitation trends and other likely sources of reported increase of river discharges.

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Держатели документа:
[Prokushkin, A. S.
Korets, M. A.
Prokushkin, S. G.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia
[Pokrovsky, O. S.
Shirokova, L. S.
Viers, J.] Univ Toulouse 3, CNRS, IRD, LMTG OMP, F-31400 Toulouse, France
[Amon, R. M. W.] Texas A&M Univ, Dept Marine Sci, Galveston, TX 77553 USA
[Guggenberger, G.] Leibniz Univ Hannover, Inst Bodenkunde, D-30419 Hannover, Germany
[McDowell, W. H.] Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA

Доп.точки доступа:
Prokushkin, A.S.; Pokrovsky, O.S.; Shirokova, L.S.; Korets, M.A.; Viers, J...; Prokushkin, S.G.; Amon, RMW; Guggenberger, G...; McDowell, W.H.

[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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Держатели документа:
[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] / V. I. Kharuk [et al.] // Glob. Ecol. Biogeogr. - 2010. - Vol. 19, Is. 6. - P822-830, DOI 10.1111/j.1466-8238.2010.00555.x. - Cited References: 33. - This research was supported by the NASA Science Mission Directorate, Terrestrial Ecology Program, the Siberian Branch Russian Academy of Science Program no. 23.3.33, and grant no. MK-2497.2009.5. Thanks to Joanne Howl for edits of the manuscript. . - 9. - ISSN 1466-822XРУБ Ecology + Geography, Physical

Аннотация: Aim To evaluate the hypothesis that topographic features of high-elevation mountain environments govern spatial distribution and climate-driven dynamics of the forest. Location Upper mountain forest stands (elevation range 1800-2600 m) in the mountains of southern Siberia. Methods Archive maps, satellite and on-ground data from1960 to 2002 were used. Data were normalized to avoid bias caused by uneven distribution of topographic features (elevation, azimuth and slope steepness) within the analysed area. Spatial distribution of forest stands was analysed with respect to topography based on a digital elevation model (DEM). Results Spatial patterns in mountain forests are anisotropic with respect to azimuth, slope steepness and elevation. At a given elevation, the majority of forests occupied slopes with greater than mean slope values. As the elevation increased, forests shifted to steeper slopes. The orientation of forest azimuth distribution changed clockwise with increase in elevation (the total shift was 120 degrees), indicating a combined effect of wind and water stress on the observed forest patterns. Warming caused changes in the forest distribution patterns during the last four decades. The area of closed forests increased 1.5 times, which was attributed to increased stand density and tree migration. The migration rate was 1.5 +/- 0.9 m year-1, causing a mean forest line shift of 63 +/- 37 m. Along with upward migration, downward tree migration onto hill slopes was observed. Changes in tree morphology were also noted as widespread transformation of the prostrate forms of Siberian pine and larch into erect forms. Main conclusions The spatial pattern of upper mountain forests as well as the response of forests to warming strongly depends on topographic relief features (elevation, azimuth and slope steepness). With elevation increase (and thus a harsher environment) forests shifted to steep wind-protected slopes. A considerable increase in the stand area and increased elevation of the upper forest line was observed coincident with the climate warming that was observed. Warming promotes migration of trees to areas that are less protected from winter desiccation and snow abrasion (i.e. areas with lower values of slope steepness). Climate-induced forest response has significantly modified the spatial patterns of high-elevation forests in southern Siberia during the last four decades, as well as tree morphology.

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Держатели документа:
[Kharuk, Vyacheslav I.
Im, Sergey T.] Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia
[Ranson, Kenneth J.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[Vdovin, Alexander S.] Siberian Fed Univ, Krasnoyarsk 660041, Russia

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Kharuk, V.I.; Ranson, K.J.; Im, S.T.; Vdovin, A.S.

[Text] / O. V. Masyagina, S. G. Prokushkin, T. . Koike // Eurasian Soil Sci. - 2010. - Vol. 43, Is. 6. - P693-700, DOI 10.1134/S1064229310060104. - Cited References: 26. - The authors thank Prof. Takashi and Prof. Lai Qu from Hokkaido University for help in collecting the material. This study was supported by the Global Environmental Research Foundation of the Ministry of Environment of Japan and by the Russian Foundation for Basic Research (project nos. 03-04-48037 and 07-04-96812). . - 8. - ISSN 1064-2293РУБ Soil Science

Аннотация: The effects of cutting on the ecological conditions and soil respiration in larch forests of Japan were studied. The cutting was found to significantly change the soil surface, resulting in the high spatial and temporal variation of the hydrothermal conditions and soil respiration. The influence of a stand's thinning on the environment and soil respiration is considered using the example of the thinning of a ripening larch stand in the Tomakomai National Forest (Hokkaido Island, Japan). The changes in the hydrothermal conditions (the temperature and moisture of the mineral soil layers and litter) and some other factors (the root and litter density and the C/N ratio) after the thinning of the stands and their influence on the soil respiration were studied. The soil respiration in the thinned forest site did not differ from that on the control plot, whereas the soil temperature was much higher in the former. The moisture of the soil mineral layers and the litter was the same. Despite the latter fact, no significant relationships between the soil respiration and its temperature and moisture were found. In the area covered with the thinned forest, the water content of the litter turned out to be the main microclimatic factor affecting the soil respiration. There, the fine roots and litter density were 18 and 15 % less, respectively. The thinning of the stand induced high variation of the soil respiration and temperature, as well as of the fine roots and the litter density. On the whole, the soil respiration in the larch forest studied in Japan was determined by the litter stock and the C to N ratio.

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Держатели документа:
[Masyagina, O. V.
Prokushkin, S. G.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forestry, Krasnoyarsk 660036, Russia
[Masyagina, O. V.
Koike, T.] Hokkaido Univ, Sapporo, Hokkaido 0608589, Japan

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Masyagina, O.V.; Prokushkin, S.G.; Koike, T...

[Text] / T. . Kajimoto [et al.] // J. For. Res. - 2007. - Vol. 12, Is. 2. - P103-112, DOI 10.1007/s10310-006-0259-y. - Cited References: 49 . - 10. - ISSN 1341-6979РУБ Forestry

Аннотация: We present results of individual-based root system measurement and analysis applied for Larix gmelinii trees growing on the continuous permafrost region of central Siberia. The data of root excavation taken from the three stands were used for the analyses; young (26 years old), mature (105 years old), and uneven-aged over-mature stand (220 years old). In this article, we highlight two topics: (1) factors affecting spatio-temporal pattern of root system development, and (2) interactions between aboveground (i.e., crown) and belowground (i.e., root) competition. For the first topic, the detailed observation of lateral roots was applied to one sample tree of the overmature stand. The tree constructed a superficial (< 30 cm in depth) and rather asymmetric root system, and each lateral root expanded mainly into elevated mounds rather than depressed troughs. This indicated that spatial development of an individual root system was largely affected by microtopography (i.e., earth hummocks). For these lateral roots, elongation growth curves were reconstructed using annual-ring data, and annual growth rates and patterns were compared among them. The comparison suggested that temporal root system development is associated with differences in carbon allocation among the lateral roots. For the second topic, we examined relationships between individual crown projection area (CA) and horizontal rooting area (RA) for the sample trees of each stand. RA was almost equal to CA in the young stand, while RA was much larger (three or four times) than CA in the mature and overmature stands. Two measures of stand-level space occupation, crown area index (aboveground: CAI; sum of CAs per unit land area) and rooting area index (belowground: RAI; sum of RAs), were estimated in each stand. The estimates of RA1 (1.3-1.8 m(2) m(-2)) exceeded unity in all stands. In contrast, CAI exceeded unity (1.3 m(2) m(-2)) only in the young stand, and was much smaller (< 0.3 m(2) m(-2)) in the two older stands. These between-stand differences in RAI-CAI relationships suggest that intertree competition for both aboveground and belowground spaces occurred in the young stand, but only belowground competition still occurred in the two older stands. Based on this finding, we hypothesized that competition below the ground may become predominant as a stand ages in L. gmelinii forests. Methodological limitations of our analysis are also discussed, especially for the analysis using the two indices of space occupation (CAI, RAI).

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Держатели документа:
Forestry & Forest Prod Res Inst, Kyushu Res Ctr, Kumamoto 8600862, Japan
Ryukoku Univ, Fac Intercultural Commun, Otsu, Shiga, Japan
Forestry & Forest Prod Res Inst, Tsukuba, Ibaraki 305, Japan
Russian Acad Sci, VN Sukachev Inst Forest, Krasnoyarsk, Russia
Kyoto Univ, Fac Agr, Kyoto, Japan
Kyoto Univ, Field Sci Educ & Res Ctr, Kyoto, Japan
Okayama Univ, Grad Sch Environm Sci, Okayama 7008530, Japan

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Kajimoto, T...; Osawa, A...; Matsuura, Y...; Abaimov, A.P.; Zyryanova, O.A.; Kondo, K...; Tokuchi, N...; Hirobe, M...

[Text] / V. I. Kharuk, M. L. Dvinskaya, K. J. Ranson // Russ. J. Ecol. - 2005. - Vol. 36, Is. 5. - P302-311, DOI 10.1007/s11184-005-0077-z. - Cited References: 23 . - 10. - ISSN 1067-4136РУБ Ecology

Аннотация: The periodicity of fires in larch forests of Evenkia and their relationship with landscape elements have been studied. Cross-sections with "burns" in them caused by past fires have been analyzed in 72 test plots; the fire chronology encompassed the period from the 15th to the 20th century. The between-fire intervals (BFIs) have been calculated by two methods: (1) on the basis of burns alone and (11) on the basis of burns and the start of growth of the new generation of larch after the earliest fire. The BFI depends on local orographic features; it is 86 +/- 11 (105 +/- 12), 61 +/- 8 (73 +/- 8), 139 +/- 17 (138 +/- 18), and 68 +/- 14 (70 +/- 13) years for northeastern slopes, southwestern slopes, bogs, and flatlands, respectively. The mean BFIs calculated by methods I and II are 82 +/- 7 and 95 +/- 7 years, respectively. The permafrost horizon rises at a mean rate of 0.3 cm per year after a forest fire. It has been shown that the number of fires regularly peaks at periods of 36 and 82 years. There is also a temporal trend in fire frequency: the mean BFI was approximately 100 years in the 19th century and 65 years in the 20th century.

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Держатели документа:
Russian Acad Sci, Sukachev Inst Forest, Siberian Div, Krasnoyarsk 660036, Russia
NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

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Kharuk, V.I.; Dvinskaya, M.L.; Ranson, K.J.