/ 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.
WOS,
Scopus
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
Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН
w10=
Найдено документов в текущей БД: 79
Seasonal and spatial variability in soil CO2 efflux rates for a central Siberian Pinus sylvestris forest
Annual ecosystem respiration budget for a Pinus sylvestris stand in Central Siberia
/ O. Shibistova, G. Zrazhevskaya et al // Tellus. Series B: Chemical and physical meteorology. - 2002. - Vol. 54B, № 5. - С. 568-589
Аннотация: Using a ground-based and an above-canopy eddy covariance system in addition to stem respiration measurements, the annual respiratory fluxes attributable to soil, stems and foliage were determined for a Scots pine (Pinus sylvestris L.) forest growing in central Siberia. Night-time foliar respiration was estimated on the basis of the difference between fluxes measured below and above the canopy and the stem respiration measurements. Comparison of the effects of night-time turbulence on measured CO2 fluxes showed flux loss above the canopy at low wind speeds, but no such effect was observed for the ground-based eddy system. This suggests that problems with flow homogeneity or flux divergence (both of which would be expected to be greater above the canopy than below) were responsible for above-canopy losses under these conditions. After correcting for this, a strong seasonality in foliar respiration was observed. This was not solely attributable to temperature variations, with intrinsic foliar respiratory capacities being much greater in spring and autumn. The opposite pattern was observed for stem respiration, with the intrinsic respiratory capacity being lower from autumn through early spring. Maximum respiratory activity was observed in early summer. This was not simply associated with a response to higher temperatures but seemed closely linked with cambial activity and the development of new xylem elements. Soil respiration rates exhibited an apparent high sensitivity to temperature, with seasonal data implying a Q(10) of about 7. We interpret this as reflecting covarying changes in soil microbial activity and soil temperatures throughout the snow-free season. Averaged over the two study years (1999 and 2000), the annual respiratory flux was estimated at 38.3 mol C m(-2) a(-1). Of this 0.61 was attributable to soil respiration, with stem respiration accounting for 0.21 and foliar respiration 0.18.
WOS,
Scopus
Держатели документа:
Russian Acad Sci, VN Sukacehv Forest Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Shibistova, Olga Borisovna; Шибистова, Ольга Борисовна; Zrazhevskaya, Galina Kirillovna; Зражевская, Галина Кирилловна
Аннотация: Using a ground-based and an above-canopy eddy covariance system in addition to stem respiration measurements, the annual respiratory fluxes attributable to soil, stems and foliage were determined for a Scots pine (Pinus sylvestris L.) forest growing in central Siberia. Night-time foliar respiration was estimated on the basis of the difference between fluxes measured below and above the canopy and the stem respiration measurements. Comparison of the effects of night-time turbulence on measured CO2 fluxes showed flux loss above the canopy at low wind speeds, but no such effect was observed for the ground-based eddy system. This suggests that problems with flow homogeneity or flux divergence (both of which would be expected to be greater above the canopy than below) were responsible for above-canopy losses under these conditions. After correcting for this, a strong seasonality in foliar respiration was observed. This was not solely attributable to temperature variations, with intrinsic foliar respiratory capacities being much greater in spring and autumn. The opposite pattern was observed for stem respiration, with the intrinsic respiratory capacity being lower from autumn through early spring. Maximum respiratory activity was observed in early summer. This was not simply associated with a response to higher temperatures but seemed closely linked with cambial activity and the development of new xylem elements. Soil respiration rates exhibited an apparent high sensitivity to temperature, with seasonal data implying a Q(10) of about 7. We interpret this as reflecting covarying changes in soil microbial activity and soil temperatures throughout the snow-free season. Averaged over the two study years (1999 and 2000), the annual respiratory flux was estimated at 38.3 mol C m(-2) a(-1). Of this 0.61 was attributable to soil respiration, with stem respiration accounting for 0.21 and foliar respiration 0.18.
WOS,
Scopus
Держатели документа:
Russian Acad Sci, VN Sukacehv Forest Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Shibistova, Olga Borisovna; Шибистова, Ольга Борисовна; Zrazhevskaya, Galina Kirillovna; Зражевская, Галина Кирилловна
Growth pattern analysis Of Larix gmelini roots in central Siberia
: материалы временных коллективов / T. Kajimoto [и др.] // Proceedings of the seventh Symposium on the joint Seberian Permafrost studies between Japan and Russia in 1998. - Sapporo : Hokkaido University, 1998. - С. 13-20. - Библиогр. в конце ст.
Аннотация: It was reconstructedof two mature Larix gmelini trees growing on permafrost soils in central Siberia. Growth analysis was made using data of annual volume increments obtained from disk samples of both stem and lateral coarse roots.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Kajimoto, T.; Каджимото Т; Sofronov, Mark Adrianovich; Софронов, Марк Адрианович; Volokitina, Alexandra Vital'yevna; Волокитина, Александра Витальевна; Abaimov, Anatoly Platonovich; Абаимов Анатолий Платонович
Имеются экземпляры в отделах:
Др (18.09.2003г. Инв.б.н. - Б.ц.) (свободен)
Аннотация: It was reconstructedof two mature Larix gmelini trees growing on permafrost soils in central Siberia. Growth analysis was made using data of annual volume increments obtained from disk samples of both stem and lateral coarse roots.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Kajimoto, T.; Каджимото Т; Sofronov, Mark Adrianovich; Софронов, Марк Адрианович; Volokitina, Alexandra Vital'yevna; Волокитина, Александра Витальевна; Abaimov, Anatoly Platonovich; Абаимов Анатолий Платонович
Имеются экземпляры в отделах:
Др (18.09.2003г. Инв.б.н. - Б.ц.) (свободен)
Age- and site-related differences in Carbon allocation patterns of Siberian Larch trees
: материалы временных коллективов / T. Kajimoto, A. P. Abaimov // Proceedings of the eighth symposium on the joint Siberian permafrost studies between Japan and Russia in 1999. - Onogawa, 2000. - С. 29-35. - Библиогр. в конце ст.
Аннотация: In this report authors examined age- and site-related differences in biomass allocation pattern of Siberian larch based on sampling data of both seedlings and mature trees, and discussed how carbon allocation changes from early to mature growth stages.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50 стр. 28
Доп.точки доступа:
Abaimov, Anatoly Platonovich ; Абаимов Анатолий Платонович; Каджимото Т
Имеются экземпляры в отделах:
ОРФ (13.01.2005г. (1 экз.) - Б.ц.) - свободны 1
Аннотация: In this report authors examined age- and site-related differences in biomass allocation pattern of Siberian larch based on sampling data of both seedlings and mature trees, and discussed how carbon allocation changes from early to mature growth stages.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50 стр. 28
Доп.точки доступа:
Abaimov, Anatoly Platonovich ; Абаимов Анатолий Платонович; Каджимото Т
Имеются экземпляры в отделах:
ОРФ (13.01.2005г. (1 экз.) - Б.ц.) - свободны 1
502
S 98
S 98
DOC in streams and soils in forested watershed underlain by continuous permafrost: A seasonal pattern
: материалы временных коллективов / A. S. Prokushkin [и др.] // Symptom of environmental change in Siberian permafrost region: proceedings of the International symposium of JSPS core to core program between Hokkaido university and Martin Luther university Halle-Wittenberg in 29-30 November 2005, Sapporo, Japan. - Sapporo : Hokkaido University Press, 2006. - С. 113-121. - Библиогр. в конце ст.
Аннотация: Terrestrial flux of DOC to stream is contributed from different sources of different qualities and quantities differing at different hydrological phases and seasons. To trace the share of every one of these fluxes is still required for further understanding of DOC production and mobilization in the permafrost affected ecosystem.
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; Hobara, S.; Хобара С.; Tokaryeva, Irina Vladimirovna; Prokushkin, Stanislav Grigor'yevich; Прокушкин Станислав Григорьевич; Abaimov, Anatoly Platonovich; Абаимов Анатолий Платонович
Имеются экземпляры в отделах:
РСФ (05.12.2006г. (1 экз.) - Б.ц.) - свободны 1
| УДК |
Аннотация: Terrestrial flux of DOC to stream is contributed from different sources of different qualities and quantities differing at different hydrological phases and seasons. To trace the share of every one of these fluxes is still required for further understanding of DOC production and mobilization in the permafrost affected ecosystem.
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; Hobara, S.; Хобара С.; Tokaryeva, Irina Vladimirovna; Prokushkin, Stanislav Grigor'yevich; Прокушкин Станислав Григорьевич; Abaimov, Anatoly Platonovich; Абаимов Анатолий Платонович
Имеются экземпляры в отделах:
РСФ (05.12.2006г. (1 экз.) - Б.ц.) - свободны 1
Nitrogen dynamics in leaves of deciduous broad-leaved tree seedlings grown in summer green forests in Northern Japan
: материалы временных коллективов / K. Takayoshi, K. Satoshi, O. V. Masyagina // Eurasian Journal of Forest Research. - 2007. - Vol. 10-1. - С. 115-119. - Библиогр. в конце ст.
Аннотация: Dynamics of nitrogen in leaves of trees and seedlings of deciduous broad-leaf species were studied for improving forest management. The photosynthetic traits of canopy leaves of diciduous broad-leaved trees were measured using a canopy tower. There was a clear positive correlation between leaf nitrogen content and light saturated photosynthetic rate at sunny canopy. As reflecting the shoot development pattern, leaf senescence began from the inner part of the crown in early successional species, by contrast leaf senescence process commences from either the outer or top portion of the crown in late successional species. For regenerated seedlings in forest floor, seasonal change in the allocation pattern of leaf nitrogen coincided with the changing of light conditions through the leaf phenology of upper canopy. In light limited condition, nitrogen was allocated to chlorophyll while it allocated to more to photosynthetic carbon fixation, i.e. Rubisco in strong light condition. Nitrogen allocated was affected more by light to CO2 condition that was found in birch and beech seedlings with a FACE system.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50, стр., 28
Доп.точки доступа:
Takayoshi, K.; Такаёши К.; Satoshi, K.; Сатоши К.; Masyagina, Oksana Viktorovna; Масягина, Оксана Викторовна
Имеются экземпляры в отделах:
ЧЗ (27.06.2007г. (1 экз.) - Б.ц.) - свободны 1
Аннотация: Dynamics of nitrogen in leaves of trees and seedlings of deciduous broad-leaf species were studied for improving forest management. The photosynthetic traits of canopy leaves of diciduous broad-leaved trees were measured using a canopy tower. There was a clear positive correlation between leaf nitrogen content and light saturated photosynthetic rate at sunny canopy. As reflecting the shoot development pattern, leaf senescence began from the inner part of the crown in early successional species, by contrast leaf senescence process commences from either the outer or top portion of the crown in late successional species. For regenerated seedlings in forest floor, seasonal change in the allocation pattern of leaf nitrogen coincided with the changing of light conditions through the leaf phenology of upper canopy. In light limited condition, nitrogen was allocated to chlorophyll while it allocated to more to photosynthetic carbon fixation, i.e. Rubisco in strong light condition. Nitrogen allocated was affected more by light to CO2 condition that was found in birch and beech seedlings with a FACE system.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50, стр., 28
Доп.точки доступа:
Takayoshi, K.; Такаёши К.; Satoshi, K.; Сатоши К.; Masyagina, Oksana Viktorovna; Масягина, Оксана Викторовна
Имеются экземпляры в отделах:
ЧЗ (27.06.2007г. (1 экз.) - Б.ц.) - свободны 1
Топоэкологический профиль как основа мониторинга динамики растительности на границе леса и степи
[Текст] = Topo-ecological profile as a basis for monitoring of the forest-steppe vegetation dynamics : материалы временных коллективов / А. В. Первунин // 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. 27-29. - Библиогр.: 2 назв.
Аннотация: Topo-ecological profile through the central part of Long ridge is described in 2006-2011. It demonstrates a complex pattern of spatial dastribution of the forest and steppe patches on the southern slope of the ridge. At about 320 m alt. abundant pine regeneration was found in surrounding of meadow-steppe. At about 460 m alt. on the northern sloppe some patches of sparse fir regeneration were revealed. The data are interesting for long-term monitoring of current state and dynamics of forest-steppe ecotone vegetation.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50/28
Доп.точки доступа:
Pervunin A.V.
Аннотация: Topo-ecological profile through the central part of Long ridge is described in 2006-2011. It demonstrates a complex pattern of spatial dastribution of the forest and steppe patches on the southern slope of the ridge. At about 320 m alt. abundant pine regeneration was found in surrounding of meadow-steppe. At about 460 m alt. on the northern sloppe some patches of sparse fir regeneration were revealed. The data are interesting for long-term monitoring of current state and dynamics of forest-steppe ecotone vegetation.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50/28
Доп.точки доступа:
Pervunin A.V.
Stable carbon isotope labeling reveals different carry-over effects between functional types of tropical trees in an Ethiopian mountain forest
/ 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 0028-646X
РУБ 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.
Полный текст,
WOS,
Scopus
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
Доп.точки доступа:
Krepkowski, J...; Gebrekirstos, A...; Shibistova, O...; Brauning, A...
Рубрики:
PODOCARPUS-FALCATUS
SOUTHERN ETHIOPIA
ALPHA-CELLULOSE
DECIDUOUS TREES
GROWTH DYNAMICS
TIME-SERIES
RINGS
RECONSTRUCTION
DELTA-C-13
DELTA-O-18
Кл.слова (ненормированные):
carryover effect -- dendrometer -- Ethiopia -- growth dynamics -- stable carbon isotopes -- tropical dendrochronology -- wood anatomy
PODOCARPUS-FALCATUS
SOUTHERN ETHIOPIA
ALPHA-CELLULOSE
DECIDUOUS TREES
GROWTH DYNAMICS
TIME-SERIES
RINGS
RECONSTRUCTION
DELTA-C-13
DELTA-O-18
Кл.слова (ненормированные):
carryover effect -- dendrometer -- Ethiopia -- growth dynamics -- stable carbon isotopes -- tropical dendrochronology -- wood anatomy
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.
Полный текст,
WOS,
Scopus
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
Доп.точки доступа:
Krepkowski, J...; Gebrekirstos, A...; Shibistova, O...; Brauning, A...
Solubility of the Labile Forms of Soil Carbon and Nitrogen in K2SO4 of Different Concentrations
/ M. I. Makarov [et al.] // Eurasian Soil Sci. - 2013. - Vol. 46, Is. 4. - P369-374, DOI 10.1134/S1064229313040091. - Cited References: 33. - This study was supported by the Russian Foundation for Basic Research (project no. 10-04-00780).
. - 6. - ISSN 1064-2293
РУБ Soil Science
Аннотация: The general pattern of the changes in the solubility of the labile carbon and nitrogen compounds with the changes in the concentration of the salt extractant (0.05 and 0.5 M K2SO4) has been determined for soils differing in their acidity and in their contents of organic matter and nitrogen. Different forms of extracted compounds react differently to changes in the salt concentration. The solubility of inorganic nitrogen compounds (and) does not depend on the concentration of K2SO4. In most cases, the carbon and nitrogen of the microbial biomass manifest a tendency for increasing extractability with an increase in the concentration of the K2SO4 solution. A fundamental difference is characteristic of the organic carbon and nitrogen compounds, the solubility of which in 0.5 M K2SO4 increases in different soils by 1.5-3.9 times in comparison with their solubility in 0.05 M K2SO4.
Полный текст,
WOS,
Scopus
Держатели документа:
[Makarov, M. I.
Shuleva, M. S.
Malysheva, T. I.] Moscow MV Lomonosov State Univ, Fac Soil Sci, Moscow 119991, Russia
[Menyailo, O. V.] Russian Acad Sci, Sukachev Forest Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Makarov, M.I.; Shuleva, M.S.; Malysheva, T.I.; Menyailo, O.V.
Рубрики:
FUMIGATION-EXTRACTION METHOD
MICROBIAL BIOMASS CARBON
CHLOROFORM FUMIGATION
NATURAL-ABUNDANCE
CALIBRATION
C-13
DECOMPOSITION
DELTA-C-13
DYNAMICS
SURFACE
Кл.слова (ненормированные):
inorganic nitrogen compounds -- organic carbon and nitrogen compounds -- microbial biomass
FUMIGATION-EXTRACTION METHOD
MICROBIAL BIOMASS CARBON
CHLOROFORM FUMIGATION
NATURAL-ABUNDANCE
CALIBRATION
C-13
DECOMPOSITION
DELTA-C-13
DYNAMICS
SURFACE
Кл.слова (ненормированные):
inorganic nitrogen compounds -- organic carbon and nitrogen compounds -- microbial biomass
Аннотация: The general pattern of the changes in the solubility of the labile carbon and nitrogen compounds with the changes in the concentration of the salt extractant (0.05 and 0.5 M K2SO4) has been determined for soils differing in their acidity and in their contents of organic matter and nitrogen. Different forms of extracted compounds react differently to changes in the salt concentration. The solubility of inorganic nitrogen compounds (and) does not depend on the concentration of K2SO4. In most cases, the carbon and nitrogen of the microbial biomass manifest a tendency for increasing extractability with an increase in the concentration of the K2SO4 solution. A fundamental difference is characteristic of the organic carbon and nitrogen compounds, the solubility of which in 0.5 M K2SO4 increases in different soils by 1.5-3.9 times in comparison with their solubility in 0.05 M K2SO4.
Полный текст,
WOS,
Scopus
Держатели документа:
[Makarov, M. I.
Shuleva, M. S.
Malysheva, T. I.] Moscow MV Lomonosov State Univ, Fac Soil Sci, Moscow 119991, Russia
[Menyailo, O. V.] Russian Acad Sci, Sukachev Forest Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Makarov, M.I.; Shuleva, M.S.; Malysheva, T.I.; Menyailo, O.V.
Genetic diversity, population structure, and differentiation of Siberian larch, Gmelin larch, and Cajander larch on SSR-marker data
/ N. V. Oreshkova, M. M. Belokon, S. . Jamiyansuren // Russ. J. Genet. - 2013. - Vol. 49, Is. 2. - P178-186, DOI 10.1134/S1022795412120095. - Cited References: 57. - This work was supported by the Russian Foundation for Basic Research, project nos. 10-04-00786-a, 11-04-00478-a, and 11-04-92112-YaF_a.
. - 9. - ISSN 1022-7954
РУБ Genetics & Heredity
Аннотация: The genetic diversity of SSR markers was studied in six populations of Siberian larch, two popu-lations of Gmelin larch, and four populations of Cajander larch. Seven pairs of nuclear microsatellite loci were used for this analysis. 103 allelic variants were detected in 365 individuals of three species of larch. According to the AMOVA results, the variability proportion that characterizes the differences between three Larix species was twice as higher (15%) than the proportion that accounts for among-population differences within the species (6%). The differentiation of the populations of three species of larch based on SSR markers exceeded 12% (F (ST) = 0.121). A significant correlation of the genetic distances with the geographic distances between populations was found (r = 0.835, P = 0.01).
Полный текст,
WOS,
Scopus
Держатели документа:
[Oreshkova, N. V.] Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
[Belokon, M. M.] Russian Acad Sci, Vavilov Inst Gen Genet, Moscow 119991, Russia
[Jamiyansuren, S.] Mongolian Acad Sci, Inst Bot, Ulaanbaatar 210523, Mongol Peo Rep
Доп.точки доступа:
Oreshkova, N.V.; Belokon, M.M.; Jamiyansuren, S...
Рубрики:
DNA VARIATION PATTERN
LARIX-LARICINA
WESTERN LARCH
MICROSATELLITE LOCI
ALLOZYME VARIATION
TAMARACK
RAPD
SIBIRICA
LINKAGE
MILL.
DNA VARIATION PATTERN
LARIX-LARICINA
WESTERN LARCH
MICROSATELLITE LOCI
ALLOZYME VARIATION
TAMARACK
RAPD
SIBIRICA
LINKAGE
MILL.
Аннотация: The genetic diversity of SSR markers was studied in six populations of Siberian larch, two popu-lations of Gmelin larch, and four populations of Cajander larch. Seven pairs of nuclear microsatellite loci were used for this analysis. 103 allelic variants were detected in 365 individuals of three species of larch. According to the AMOVA results, the variability proportion that characterizes the differences between three Larix species was twice as higher (15%) than the proportion that accounts for among-population differences within the species (6%). The differentiation of the populations of three species of larch based on SSR markers exceeded 12% (F (ST) = 0.121). A significant correlation of the genetic distances with the geographic distances between populations was found (r = 0.835, P = 0.01).
Полный текст,
WOS,
Scopus
Держатели документа:
[Oreshkova, N. V.] Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
[Belokon, M. M.] Russian Acad Sci, Vavilov Inst Gen Genet, Moscow 119991, Russia
[Jamiyansuren, S.] Mongolian Acad Sci, Inst Bot, Ulaanbaatar 210523, Mongol Peo Rep
Доп.точки доступа:
Oreshkova, N.V.; Belokon, M.M.; Jamiyansuren, S...
Rate of Belowground Carbon Allocation Differs with Successional Habit of Two Afromontane Trees
/ 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 1932-6203
РУБ 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.
WOS,
Scopus
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...
Рубрики:
HIGH TEMPORAL RESOLUTION
SOIL RESPIRATION
ISOTOPE COMPOSITION
SOUTHERN ETHIOPIA
GAS-EXCHANGE
TERRESTRIAL ECOSYSTEMS
PHYSIOLOGICAL ECOLOGY
ORGANIC-COMPOUNDS
TROPICAL FORESTS
FAGUS-SYLVATICA
HIGH TEMPORAL RESOLUTION
SOIL RESPIRATION
ISOTOPE COMPOSITION
SOUTHERN ETHIOPIA
GAS-EXCHANGE
TERRESTRIAL ECOSYSTEMS
PHYSIOLOGICAL ECOLOGY
ORGANIC-COMPOUNDS
TROPICAL FORESTS
FAGUS-SYLVATICA
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.
WOS,
Scopus
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...
Sources and the flux pattern of dissolved carbon in rivers of the Yenisey basin draining the Central Siberian Plateau
[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 1748-9326
РУБ 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.
WOS,
Scopus
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.
Рубрики:
ORGANIC-CARBON
CONTINUOUS PERMAFROST
NORTHERN SIBERIA
TRACE-ELEMENTS
CLIMATE-CHANGE
ARCTIC-OCEAN
WATER
BIOGEOCHEMISTRY
GENERATION
SPECIATION
Кл.слова (ненормированные):
dissolved carbon -- riverine flux -- permafrost -- Central Siberian Plateau
ORGANIC-CARBON
CONTINUOUS PERMAFROST
NORTHERN SIBERIA
TRACE-ELEMENTS
CLIMATE-CHANGE
ARCTIC-OCEAN
WATER
BIOGEOCHEMISTRY
GENERATION
SPECIATION
Кл.слова (ненормированные):
dissolved carbon -- riverine flux -- permafrost -- Central Siberian Plateau
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.
WOS,
Scopus
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.
Soil CO2 efflux in an Afromontane forest of Ethiopia as driven by seasonality and tree species
[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 0378-1127
РУБ 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.
Полный текст,
WOS,
Scopus
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
Доп.точки доступа:
Yohannes, Y...; Shibistova, O...; Abate, A...; Fetene, M...; Guggenberger, G...
Рубрики:
TROPICAL RAIN-FOREST
CARBON-DIOXIDE
ECOSYSTEM RESPIRATION
TEMPORAL VARIATION
SOUTHERN ETHIOPIA
EUROPEAN FORESTS
VEGETATION TYPES
WATER RELATIONS
MONTANE FOREST
TEMPERATURE
Кл.слова (ненормированные):
Croton macrostachys -- Ethiopia -- Podocarpus falcatus -- Prunus africana -- Soil CO2 efflux -- Soil moisture -- Soil respiration -- Soil temperature -- Tropical forest
TROPICAL RAIN-FOREST
CARBON-DIOXIDE
ECOSYSTEM RESPIRATION
TEMPORAL VARIATION
SOUTHERN ETHIOPIA
EUROPEAN FORESTS
VEGETATION TYPES
WATER RELATIONS
MONTANE FOREST
TEMPERATURE
Кл.слова (ненормированные):
Croton macrostachys -- Ethiopia -- Podocarpus falcatus -- Prunus africana -- Soil CO2 efflux -- Soil moisture -- Soil respiration -- Soil temperature -- Tropical forest
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.
Полный текст,
WOS,
Scopus
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
Доп.точки доступа:
Yohannes, Y...; Shibistova, O...; Abate, A...; Fetene, M...; Guggenberger, G...
A variogram-based analysis of insect wing images to detect outbreaks: a case study of a pine looper (Bupalus piniarius L.) population
[Text] / O. P. Sekretenko [et al.] ; ed.: A Stein, E Pebesma, Pebesma, // SPATIAL STATISTICS 2011: MAPPING GLOBAL CHANGE. Ser. Procedia Environmental Sciences : ELSEVIER SCIENCE BV, 2011. - Vol. 7: 1st International Conference on Spatial Statistics - Mapping Global Change (MAR 23-25, 2011, Enschede, NETHERLANDS). - P230-233, DOI 10.1016/j.proenv.2011.07.040. - Cited References: 4
. - 4. - ISBN 1878-0296
РУБ Environmental Sciences + Meteorology & Atmospheric Sciences
Кл.слова (ненормированные):
Geostatistics -- population dynamics -- forest ecosystems -- monitoring of insects' outbreaks
Аннотация: The coloration of forest insects changes as their population density increases or decreases. Using the geostatistical method allowed us to determine the population dynamics' phase of the pine looper from images of insects' wings. The color and pattern of the insects' wings can be successfully used as diagnostic features in determining the phase of the population dynamics. (C) 2010 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Spatial Statistics 2011
WOS,
Scopus
Держатели документа:
[Sekretenko, O. P.
Soukhovolsky, V. G.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Sekretenko, O.P.; Palnikova, E.N.; Kovalev, A.V.; Soukhovolsky, V.G.; Stein, A \ed.\; Pebesma, E \ed.\; Pebesma, \ed.\
Кл.слова (ненормированные):
Geostatistics -- population dynamics -- forest ecosystems -- monitoring of insects' outbreaks
Аннотация: The coloration of forest insects changes as their population density increases or decreases. Using the geostatistical method allowed us to determine the population dynamics' phase of the pine looper from images of insects' wings. The color and pattern of the insects' wings can be successfully used as diagnostic features in determining the phase of the population dynamics. (C) 2010 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Spatial Statistics 2011
WOS,
Scopus
Держатели документа:
[Sekretenko, O. P.
Soukhovolsky, V. G.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Sekretenko, O.P.; Palnikova, E.N.; Kovalev, A.V.; Soukhovolsky, V.G.; Stein, A \ed.\; Pebesma, E \ed.\; Pebesma, \ed.\
Factors influencing the spatial pattern of the ash content of bog birch forest litter
[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 1878-0296
РУБ Environmental Sciences + Geography, Physical
Кл.слова (ненормированные):
Forest litter -- ash stock -- western Siberia -- spatial statistics -- geostatistics -- Betula pubescens Ehrh
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
WOS,
Scopus
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.\
Кл.слова (ненормированные):
Forest litter -- ash stock -- western Siberia -- spatial statistics -- geostatistics -- Betula pubescens Ehrh
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
WOS,
Scopus
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.\
Spatial distribution and temporal dynamics of high-elevation forest stands in southern Siberia
[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 1466-822X
РУБ 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.
Полный текст,
WOS,
Scopus
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
Доп.точки доступа:
Kharuk, V.I.; Ranson, K.J.; Im, S.T.; Vdovin, A.S.
Рубрики:
GLACIER-NATIONAL-PARK
CLIMATE-CHANGE
SWEDISH SCANDES
TUNDRA ECOTONE
ALPINE
MOUNTAINS
TREELINE
20TH-CENTURY
PERSPECTIVE
ENVIRONMENT
Кл.слова (ненормированные):
Alpine ecotone -- climate change -- landscape ecology -- mountain forests -- Siberia -- tree line -- topographic analysis
GLACIER-NATIONAL-PARK
CLIMATE-CHANGE
SWEDISH SCANDES
TUNDRA ECOTONE
ALPINE
MOUNTAINS
TREELINE
20TH-CENTURY
PERSPECTIVE
ENVIRONMENT
Кл.слова (ненормированные):
Alpine ecotone -- climate change -- landscape ecology -- mountain forests -- Siberia -- tree line -- topographic analysis
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.
Полный текст,
WOS,
Scopus
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
Доп.точки доступа:
Kharuk, V.I.; Ranson, K.J.; Im, S.T.; Vdovin, A.S.
Seasonal, synoptic, and diurnal-scale variability of biogeochemical trace gases and O-2 from a 300-m tall tower in central Siberia
[Text] / E. A. Kozlova [et al.] // Glob. Biogeochem. Cycle. - 2008. - Vol. 22, Is. 4. - Ст. GB4020, DOI 10.1029/2008GB003209. - Cited References: 79. - We thank A. Jordan (MPI-BGC) and D. Worthy (Environment Canada) for their invaluable advice and contribution in establishing GC measurements at ZOTTO, and we thank R. Keeling and his group (SIO) for their help and advice with the OINF2/INF measurements, including the loan of a Servomex OINF2/INF sensor. We are very grateful to E.-D. Schulze (MPI-BGC) for many years of work toward the establishment of ZOTTO station. Many thanks to A. Jordan, W. Brand, F. Hansel, and M. Hielscher (MPI-BGC) for calibration cylinder preparations and to K. Kubler, R. Leppert, S. Schmidt, F. Voigt, B. Schloffel, R. Schwalbe, and U. Schultz (MPI-BGC) for general advice, instrument design and functioning, and logistical and technical support. We thank all employees of the Sukachev Institute of Forest, SB RAS, in Krasnoyarsk, who participated in the site construction, logistics, and maintenance of the measurement system. We also thank all workers from the Russian construction company "Stroitechinvest.'' E. A. K. thanks her supervisor, A. Watson (UEA), for general support and advice. The ZOTTO project is funded by the Max Planck Society through International Science and Technology Center (ISTC) partner project 2757p within the framework of the proposal "Observing and Understanding Biogeochemical Responses to Rapid Climate Changes in Eurasia.'' We are very grateful to Ronnie Robertson from Shetland Islands for the flask samples collection. E. A. K. is supported by a UEA Zuckerman Studentship, and A. C. M. is supported by a U.K. NERC/QUEST Advanced Fellowship (Ref. NE/C002504/1). We also thank three anonymous reviewers for their comments that helped to improve this paper.
. - 16. - ISSN 0886-6236
РУБ Environmental Sciences + Geosciences, Multidisciplinary + Meteorology & Atmospheric Sciences
Аннотация: We present first results from 19 months of semicontinuous concentration measurements of biogeochemical trace gases (CO2, CO, and CH4) and O-2, measured at the Zotino Tall Tower Observatory (ZOTTO) in the boreal forest of central Siberia. We estimated CO2 and O2 seasonal cycle amplitudes of 26.6 ppm and 134 per meg, respectively. An observed west-east gradient of about -7 ppm (in July 2006) between Shetland Islands, Scotland, and ZOTTO reflects summertime continental uptake of CO2 and is consistent with regional modeling studies. We found the oceanic component of the O-2 seasonal amplitude (Atmospheric Potential Oxygen, or APO) to be 51 per meg, significantly smaller than the 95 per meg observed at Shetlands, illustrating a strong attenuation of the oceanic O-2 signal in the continental interior. Comparison with the Tracer Model 3 (TM3) atmospheric transport model showed good agreement with the observed phasing and seasonal amplitude in CO2; however, the model exhibited greater O-2 (43 per meg, 32%) and smaller APO (9 per meg, 18%) amplitudes. This seeming inconsistency in model comparisons between O-2 and APO appears to be the result of phasing differences in land and ocean signals observed at ZOTTO, where ocean signals have a significant lag. In the first 2 months of measurements on the fully constructed tower (November and December 2006), we observed several events with clear vertical concentration gradients in all measured species except CO. During "cold events'' (below -30 degrees C) in November 2006, we observed large vertical gradients in CO2 (up to 22 ppm), suggesting a strong local source. The same pattern was observed in CH4 concentrations for the same events. Diurnal vertical CO2 gradients in April to May 2007 gave estimates for average nighttime respiration fluxes of 0.04 +/- 0.02 mol C m(-2) d(-1), consistent with earlier eddy covariance measurements in 1999-2000 in the vicinity of the tower.
WOS,
Scopus
Держатели документа:
[Kozlova, Elena A.
Manning, Andrew C.] Univ E Anglia, Sch Environm Sci, Norwich NR4 7TJ, Norfolk, England
[Kozlova, Elena A.
Seifert, Thomas
Heimann, Martin] Max Planck Inst Biogeochem, D-07745 Jena, Germany
[Kisilyakhov, Yegor] Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Kozlova, E.A.; Manning, A.C.; Kisilyakhov, Y...; Seifert, T...; Heimann, M...
Рубрики:
ATMOSPHERIC OXYGEN MEASUREMENTS
SOUTHERN-HEMISPHERE AIR
GLOBAL CARBON BUDGET
INTERANNUAL VARIABILITY
O-2/N-2 RATIO
CO2
CYCLE
DIOXIDE
METHANE
EXCHANGE
ATMOSPHERIC OXYGEN MEASUREMENTS
SOUTHERN-HEMISPHERE AIR
GLOBAL CARBON BUDGET
INTERANNUAL VARIABILITY
O-2/N-2 RATIO
CO2
CYCLE
DIOXIDE
METHANE
EXCHANGE
Аннотация: We present first results from 19 months of semicontinuous concentration measurements of biogeochemical trace gases (CO2, CO, and CH4) and O-2, measured at the Zotino Tall Tower Observatory (ZOTTO) in the boreal forest of central Siberia. We estimated CO2 and O2 seasonal cycle amplitudes of 26.6 ppm and 134 per meg, respectively. An observed west-east gradient of about -7 ppm (in July 2006) between Shetland Islands, Scotland, and ZOTTO reflects summertime continental uptake of CO2 and is consistent with regional modeling studies. We found the oceanic component of the O-2 seasonal amplitude (Atmospheric Potential Oxygen, or APO) to be 51 per meg, significantly smaller than the 95 per meg observed at Shetlands, illustrating a strong attenuation of the oceanic O-2 signal in the continental interior. Comparison with the Tracer Model 3 (TM3) atmospheric transport model showed good agreement with the observed phasing and seasonal amplitude in CO2; however, the model exhibited greater O-2 (43 per meg, 32%) and smaller APO (9 per meg, 18%) amplitudes. This seeming inconsistency in model comparisons between O-2 and APO appears to be the result of phasing differences in land and ocean signals observed at ZOTTO, where ocean signals have a significant lag. In the first 2 months of measurements on the fully constructed tower (November and December 2006), we observed several events with clear vertical concentration gradients in all measured species except CO. During "cold events'' (below -30 degrees C) in November 2006, we observed large vertical gradients in CO2 (up to 22 ppm), suggesting a strong local source. The same pattern was observed in CH4 concentrations for the same events. Diurnal vertical CO2 gradients in April to May 2007 gave estimates for average nighttime respiration fluxes of 0.04 +/- 0.02 mol C m(-2) d(-1), consistent with earlier eddy covariance measurements in 1999-2000 in the vicinity of the tower.
WOS,
Scopus
Держатели документа:
[Kozlova, Elena A.
Manning, Andrew C.] Univ E Anglia, Sch Environm Sci, Norwich NR4 7TJ, Norfolk, England
[Kozlova, Elena A.
Seifert, Thomas
Heimann, Martin] Max Planck Inst Biogeochem, D-07745 Jena, Germany
[Kisilyakhov, Yegor] Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Kozlova, E.A.; Manning, A.C.; Kisilyakhov, Y...; Seifert, T...; Heimann, M...
Individual-based measurement and analysis of root system development: case studies for Larix gmelinii trees growing on the permafrost region in Siberia
[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 1341-6979
РУБ 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).
Полный текст,
WOS,
Scopus
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
Доп.точки доступа:
Kajimoto, T...; Osawa, A...; Matsuura, Y...; Abaimov, A.P.; Zyryanova, O.A.; Kondo, K...; Tokuchi, N...; Hirobe, M...
Рубрики:
MINIRHIZOTRON TECHNIQUE
ABOVEGROUND BIOMASS
FOREST ECOSYSTEMS
GROWTH EFFICIENCY
DOUGLAS-FIR
DYNAMICS
ARCHITECTURE
COMPETITION
PLANTATION
PATTERNS
Кл.слова (ненормированные):
crown projection area -- Larix gmelinii -- permafrost -- rooting area index -- root system development
MINIRHIZOTRON TECHNIQUE
ABOVEGROUND BIOMASS
FOREST ECOSYSTEMS
GROWTH EFFICIENCY
DOUGLAS-FIR
DYNAMICS
ARCHITECTURE
COMPETITION
PLANTATION
PATTERNS
Кл.слова (ненормированные):
crown projection area -- Larix gmelinii -- permafrost -- rooting area index -- root system development
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).
Полный текст,
WOS,
Scopus
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
Доп.точки доступа:
Kajimoto, T...; Osawa, A...; Matsuura, Y...; Abaimov, A.P.; Zyryanova, O.A.; Kondo, K...; Tokuchi, N...; Hirobe, M...
The spatiotemporal pattern of fires in northern Taiga larch forests of central Siberia
[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 1067-4136
РУБ Ecology
Кл.слова (ненормированные):
larch forests -- burned-out areas -- fire periodicity -- permafrost -- climatic trends
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.
Полный текст,
WOS,
Scopus
Держатели документа:
Russian Acad Sci, Sukachev Inst Forest, Siberian Div, Krasnoyarsk 660036, Russia
NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
Доп.точки доступа:
Kharuk, V.I.; Dvinskaya, M.L.; Ranson, K.J.
Кл.слова (ненормированные):
larch forests -- burned-out areas -- fire periodicity -- permafrost -- climatic trends
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.
Полный текст,
WOS,
Scopus
Держатели документа:
Russian Acad Sci, Sukachev Inst Forest, Siberian Div, Krasnoyarsk 660036, Russia
NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
Доп.точки доступа:
Kharuk, V.I.; Dvinskaya, M.L.; Ranson, K.J.
Impact of the Arctic Oscillation pattern on interannual forest fire variability in Central Siberia
[Text] / H. . Balzter [et al.] // Geophys. Res. Lett. - 2005. - Vol. 32, Is. 14. - Ст. L14709, DOI 10.1029/2005GL022526. - Cited References: 20
. - 4. - ISSN 0094-8276
РУБ Geosciences, Multidisciplinary
Аннотация: Russia's forests play an important role in the global carbon cycle. Because of their scale and interannual variability, forest fires can change the direction of the net carbon flux over Eurasia. 2002 and 2003 were the first two consecutive years in the atmospheric record in which the carbon content rose by more than 2 ppm per year. Northern Hemisphere fires could be the reason. We show that 2002 and 2003 were the two years with the largest fire extent in Central Siberia since 1996 using new measurements of burned forest area in Central Siberia derived from remote sensing. To quantify the relationship between Siberian forest fires and climate variability, we compare these measurements with time-series of large-scale climatic indices for the period 1992-2003. This paper is amongst the first studies that analyse statistical relationships between interannual variability of forest fires in Russia and climate indices. Significant relationships of annual burned forest area with the Arctic Oscillation, summer temperatures, precipitation, and the El Nino index NINO4 were found (p0.1). In contrast, we find no significant relation with the El Nino indices NINO1, NINO3 or SOI (p0.1). Interannual forest fire variability in Central Siberia could best be explained by a combination of the Arctic Oscillation index and regional summer temperatures (r(2)=0.80).
WOS,
Scopus
Держатели документа:
Ctr Ecol & Hydrol Monks Wood, Climate & Land Surface Syst Interact Ctr, Huntingdon PE28 2LS, Cambs, England
Int Inst Appl Syst Anal, A-2361 Laxenburg, Austria
Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Univ Jena, Inst Geog, D-07743 Jena, Germany
Доп.точки доступа:
Balzter, H...; Gerard, F.F.; George, C.T.; Rowland, C.S.; Jupp, T.E.; McCallum, I...; Shvidenko, A...; Nilsson, S...; Sukhinin, A...; Onuchin, A...; Schmullius, C...
Аннотация: Russia's forests play an important role in the global carbon cycle. Because of their scale and interannual variability, forest fires can change the direction of the net carbon flux over Eurasia. 2002 and 2003 were the first two consecutive years in the atmospheric record in which the carbon content rose by more than 2 ppm per year. Northern Hemisphere fires could be the reason. We show that 2002 and 2003 were the two years with the largest fire extent in Central Siberia since 1996 using new measurements of burned forest area in Central Siberia derived from remote sensing. To quantify the relationship between Siberian forest fires and climate variability, we compare these measurements with time-series of large-scale climatic indices for the period 1992-2003. This paper is amongst the first studies that analyse statistical relationships between interannual variability of forest fires in Russia and climate indices. Significant relationships of annual burned forest area with the Arctic Oscillation, summer temperatures, precipitation, and the El Nino index NINO4 were found (p0.1). In contrast, we find no significant relation with the El Nino indices NINO1, NINO3 or SOI (p0.1). Interannual forest fire variability in Central Siberia could best be explained by a combination of the Arctic Oscillation index and regional summer temperatures (r(2)=0.80).
WOS,
Scopus
Держатели документа:
Ctr Ecol & Hydrol Monks Wood, Climate & Land Surface Syst Interact Ctr, Huntingdon PE28 2LS, Cambs, England
Int Inst Appl Syst Anal, A-2361 Laxenburg, Austria
Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Univ Jena, Inst Geog, D-07743 Jena, Germany
Доп.точки доступа:
Balzter, H...; Gerard, F.F.; George, C.T.; Rowland, C.S.; Jupp, T.E.; McCallum, I...; Shvidenko, A...; Nilsson, S...; Sukhinin, A...; Onuchin, A...; Schmullius, C...