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

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Найдено документов в текущей БД: 23

    Interannual and seasonal variations of energy and water vapour fluxes above a Pinus sylvestris forest in the Siberian middle taiga
/ N.M. Tchebakova et al, O. Shibistova // Tellus. Series B: Chemical and physical meteorology. - 2002. - Vol. 54B, № 5. - С. 537-551

Аннотация: Long-term eddy covariance measurements of energy and water fluxes and associated climatic parameters were carried out above a Scots pine (Pinus sylvestris) forest in the middle taiga zone of Central Siberia. Data from June 1998 through October 2000 are presented. With the exception of winter 1998/1999, data collection over this period were more or less continuous. A distinct seasonality in surface energy exchange characteristics was observed in all years. In early spring in the absence of physiological activity by the vegetation, about 80% of the net radiation was partitioned for sensible heat, resulting in Bowen ratios, beta, as high as 8. In the 1-2 wk period associated with onset of photosynthesis in spring, evaporation rates increased rapidly and beta rapidly dropped. However, even during summer months, sensible heat fluxes typically exceeded latent heat fluxes and beta remained above 2.0. Observed daily evaporation rates varied between 0.5-1.0 mm d(-1) in spring and autumn and 1.5-2 mm d(-1) in midsummer. The overall average for the three growing seasons examined was 1.25 mm d(-1). Precipitation was on average 230 mm for the growing period, with evaporation over the same time being about 190 mm for both 1999 and 2000. This represented only about 35% of the equilibrium evaporation rate. There was typically a positive hydrological balance of 40 mm for the growing season as a whole. However, in all three years examined, evaporation exceeded precipitation totals by 20-40 mm in at least one calendar month during summer. During the growing season, daily averaged surface conductances varied between 0.15 and 0.20 mol m(-2) s(-1) (3-4.5 mm s(-1)) in dry or cool months and 0.30-0.35 mol m(-2) s(-1) (6.5-8 mm s(-1)) in moist and warm months. Despite a negative hydrological balance during midsummer, there was little evidence for reduced canopy conductances in response to soil water deficits. This may have been the consequence of roots accessing water from within or just above a perched water table, located at about 2 m depth.

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Держатели документа:
Russian Acad Sci, Sukachev Inst Forest

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

    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.

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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; Zrazhevskaya, Galina Kirillovna; Зражевская, Галина Кирилловна

    Three years of trace gas observations over the EuroSiberian domain derived from aircraft sampling - a concerted action
/ I. Levin, N. M. Tchebakova, O. Shibistova // Tellus. Series B: Chemical and physical meteorology. - 2002. - Vol. 54B, № 5. - С. 696-712

Аннотация: A three-year trace gas climatology of CO2 and its stable isotopic ratios, as well as CH4, N2O and SF6, derived from regular vertical aircraft sampling over the Eurasian continent is presented. The four sampling sites range from about 1degreesE to 89degreesE in the latitude belt from 48N to 62degreesN. The most prominent features of the CO2 observations are an increase of the seasonal cycle amplitudes of CO2 and delta(13)C-CO2 in the free troposphere (at 3000 m a.s.l.) by more than 60% from Western Europe to Western and Central Siberia. delta(18)O-CO2 shows an even larger increase of the seasonal cycle amplitude by a factor of two from Western Europe towards the Ural mountains, which decreases again towards the most eastern site, Zotino. These data reflect a strong influence of carbon exchange fluxes with the continental biosphere. In particular, during autumn and winter delta(18)O-CO2 shows a decrease by more than 0.5parts per thousand from Orleans (Western Europe) to Syktyvkar (Ural mountains) and Zotino (West Siberia), mainly caused by soil respiration fluxes depleted in delta(18)O with respect to atmospheric CO2. CH4 mixing ratios in the free troposphere at 3000 m over Western Siberia are higher by about 20-30 ppb if compared to Western Europe. Wetland emissions seem to be particularly visible in July-September, with largest signals at Zotino in 1998. Annual mean CH4 mixing ratios decrease slightly from 1998 to 1999 at all Russian sites. In contrast to CO2 and CH4, which show significant vertical gradients between 2000 and 3000 m a.s.l., N2O mixing ratios are vertically very homogeneous and show no significant logitudinal gradient between the Ural mountains and Western Siberia, indicating insignificant emissions of this trace gas from boreal forest ecosystems in Western Siberia. The growth rate of N2O (1.2-1.3 ppb yr(-1)) and the seasonal amplitude (0:5-1.1 ppb) are similar at both aircraft sites, Syktyvkar and Zotino. For SF6 an annual increase of 5% is observed, together with a small seasonal cycle which is in phase with the N2O cycle, indicating that the seasonality of both trace gases are most probably caused by atmospheric transport processes with a possible contribution from stratosphere-troposphere exchange.

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

Доп.точки доступа:
Levin, I.; Левин И.; Tchebakova, Nadezhda Mikhailovna; Чебакова, Надежда Михайловна; Shibistova, Olga Borisovna; Шибистова, Ольга Борисовна

    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.

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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

Доп.точки доступа:
Yohannes, Y...; Shibistova, O...; Abate, A...; Fetene, M...; Guggenberger, G...

    Spatial and temporal oxygen isotope trends at the northern tree-line in Eurasia
[Text] / M. . Saurer [et al.] // Geophys. Res. Lett. - 2002. - Vol. 29, Is. 15. - Ст. 1296, DOI 10.1029/2001GL013739. - Cited References: 23 . - 4. - ISSN 0094-8276
РУБ Geosciences, Multidisciplinary

Аннотация: [1] The oxygen isotope ratio of ice cores and sea-sediments is an extremely useful source of information on long-term climatic changes. A similar approach has been applied to the oxygen isotope ratio of tree rings to enable a pattern-based reconstruction of the isotope variations on the continents. We present an oxygen isotope map for northern Eurasia spanning from Norway to Siberia, that reflects the isotope distribution in the late 19th century, and compare it with an equivalent map for the present-day situation. The average isotope values of 130 trees show a large east-to-west gradient and are highly correlated with the isotope distribution of precipitation. Surprisingly, the (18)O/(16)O ratio of the wood has been decreasing in the interior of the continent since the late 19th century, in contrast to the strong temperature increase recorded by meteorological data. From this isotope trend over time a change in the seasonality of precipitation can be inferred.

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Держатели документа:
Paul Scherrer Inst, CH-5232 Villigen, Switzerland
Swiss Fed Res Inst WSL, CH-8903 Birmensdorf, Switzerland
Russian Acad Sci, Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Russian Acad Sci, Ural Branch, Inst Plant & Anim Ecol, Ekaterinburg 620219, Russia

Доп.точки доступа:
Saurer, M...; Schweingruber, F...; Vaganov, E.A.; Shiyatov, S.G.; Siegwolf, R...

    Seasonal development dynamics of microbocenoses and complexes of invertebrates on overburden heaps of the Borodinskoye brown-coal mine (KATEK)
/ A. V. Bogorodskaya [et al.] // Geography and Natural Resources. - 2010. - Vol. 31, Is. 4. - P330-338, DOI 10.1016/j.gnr.2010.11.005 . - ISSN 1875-3728
Аннотация: We have investigated the seasonal-dynamics parameters of functioning of microbocenoses and invertebrate complexes on overburden heaps of different ages as well as the recultivation technology for of the Borodinskoye brown-coal mine. The 20-year-old overburden heap with typical natural reforestation and formation of a coarse-humus horizon was characterized by the largest balance of microbiological processes of organic matter destruction, and by high numbers and diversity of microarthropods. The youngest heaps are characterized by an unbalance between organic matter mineralization-immobilization processes and predominance of pioneer invertebrate groups in the community. В© 2010.

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Держатели документа:
Institute of Forest SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Bogorodskaya, A.V.; Krasnoshchekova, E.N.; Trefilova, O.V.; Shishikin, A.S.

    Biological sources of soil CO2 under Larix sibirica and Pinus sylvestris
[Text] / A. I. Matvienko, M. I. Makarov, O. V. Menyailo // Russ. J. Ecol. - 2014. - Vol. 45, Is. 3. - P174-180, DOI 10.1134/S1067413614030072. - Cited References: 15. - This study was supported by the Russian Foundation for Basic Research (project no. 10-04-92518-IK_a), the Siberian Branch of the Russian Academy of Sciences (project no. 122), and a CRDF grant no. RUG1-2979-KR-10. . - ISSN 1067-4136. - ISSN 1608-3334
РУБ Ecology

Аннотация: Mycorrhizal ingrowth collars were used to study the effect of tree species on the seasonal dynamics of carbon dioxide flux from three major sources of soil respiration: (1) plant roots, (2) mycorrhizal hyphae, and (3) microorganisms. Distinct seasonality in carbon transport to mycorrhizae was revealed, with its highest values being observed during the second half of the growing season. The annual amount of C transferred through mycorrhizae did not differ between the two tree species, and the contribution of mycorrhizae to soil surface CO2 emission was about 20%.

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Держатели документа:
[Matvienko, A. I.
Menyailo, O. V.] Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
[Makarov, M. I.] Moscow MV Lomonosov State Univ, Moscow 119991, Russia
ИЛ СО РАН

Доп.точки доступа:
Matvienko, A.I.; Makarov, M.I.; Menyailo, O.V.; Russian Foundation for Basic Research [10-04-92518-IK_a]; Siberian Branch of the Russian Academy of Sciences [122]; CRDF [RUG1-2979-KR-10]

    Evidences of wider latewood in Pinus sylvestris from a forest-steppe of Southern Siberia
/ A. Arzac [et al.] // Dendrochronologia. - 2018. - Vol. 49. - P1-8, DOI 10.1016/j.dendro.2018.02.007 . - ISSN 1125-7865

Кл.слова (ненормированные):
Climate change -- Drought -- Tracheidogram -- VS-oscilloscope -- Xylem anatomy -- Pinus sylvestris

Аннотация: Climate affects wood formation with consequences for the functioning and survival of trees. Since tree-rings tissues (i.e., earlywood and latewood) are formed at different time in the season, the impact of climate change might differently affect their functions. In this study, we combine quantitative tracheid anatomy with the Vaganov-Shashkin growth model (VS-model) to investigate how summer drought affected the annual ring structure of Pinus sylvestris L. from a forest-steppe zone in Southern Siberia. In particular, we used climate-growth relationships over a 50-year period to identify the timing of climatic signal of early-, transition-, and late-wood tracheid's diameters (DEW, DTW and DLW). Corresponding daily growth rates (Gr) obtained by the VS-model were applied to calculate the changes in the width of the relative tree-ring sectors considering different levels of aridity. Results indicate that tracheid size is sensitive to drought with temporal shifts among the climatic signal of DEW (in May), DTW (June) and DLW (July). A comparison of modeled daily-growth rate cumulated over the climatic window of each ring sector and grouped by years with different level of aridity, indicated that a release of summer drought mostly affected the widths of the transition (+28.1%) and (+48.6%) latewood sectors, thus matching observations performed on the same cores. These results suggest that current changes in climate seasonality, as occurring in the selected area, are positively impacting both the hydraulic efficiency (by increasing the diameter of the earlywood cells) and the latewood width of the wood produced in the area. © 2018 Elsevier GmbH

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Держатели документа:
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, Russian Federation
Khakass Technical Institute, Siberian Federal University, 27 Shchetinkina St., Abakan, Russian Federation
Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zuercherstrasse 111, Birmensdorf, Switzerland
V. N. Sukachev Institute of Forest, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/28, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Arzac, A.; Babushkina, E. A.; Fonti, P.; Slobodchikova, V.; Sviderskaya, I. V.; Vaganov, E. A.

    What prevails in climatic response of Pinus sylvestris in-between its range limits in mountains: slope aspect or elevation?
/ D. F. Zhirnova [et al.] // Int. J. Biometeorol., DOI 10.1007/s00484-019-01811-0. - Cited References:94. - The research was supported by the Russian Foundation for Basic Research (17-04-00315, 17-44-240809). . - ISSN 0020-7128. - ISSN 1432-1254
РУБ Biophysics + Environmental Sciences + Meteorology & Atmospheric Sciences

Аннотация: The roles of slope orientation and elevational temperature gradient were investigated for Scots pine (Pinus sylvestris L.) growth in the middle of its growth range, where these factors can significantly modulate microclimate and thus plant growth. We assumed that slope orientation causes more complex and severe effects than elevation because it influences all three main factors of plant growth: light, heat, and moisture. In addition to the total ring width, the earlywood and latewood width and latewood ratio were considered variables that contain information about tree ring growth during the season and wood structure over all tree life span on three sampling sites at different elevations and opposite slopes. Despite the observed dependence of pine growth rate on temperature and solar radiation, the mean latewood ratio is stable and similar between all sampling sites, being presumably defined by the genotype of individual trees. The seasonality of the climatic response of tree growth is bound to spatiotemporal variation of the vegetative season timing due to the elevational temperature lapse and local warming. However, its direction is primarily defined by slope orientation, where southern slope is moisture-limited, even at adjacent sites, and divergent climatic reactions of earlywood (weak moisture-limited in the last decades) and latewood growth (temperature-limited) were revealed on the northern slope.

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Держатели документа:
Siberian Fed Univ, Khakass Tech Inst, 27 Shchetinkina, Abakan 655017, Russia.
Natl Pk Shushensky Bor, 9 Lugovaya, Shushenskoye 662710, Russia.
Siberian Fed Univ, 79 Svobodny, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, 50-28 Akademgorodok, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Zhirnova, Dina F.; Belokopytova, Liliana V.; Barabantsova, Anna E.; Babushkina, Elena A.; Vaganov, Eugene A.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [17-04-00315, 17-44-240809]

    Postfire recruitment failure in Scots pine forests of southern Siberia
/ K. Barrett, R. Baxter, E. Kukavskaya [et al.] // Remote Sens. Environ. - 2020. - Vol. 237. - Ст. 111539, DOI 10.1016/j.rse.2019.111539 . - ISSN 0034-4257
Аннотация: Wildfire disturbances effect changes in vegetation communities that in turn influence climate. Such changes in boreal forest ecosystems can persist over decadal time scales or longer. In the ecotone between boreal forest and steppe in the region southeast of Lake Baikal in southern Siberia, shifts between the two vegetation types may be precipitated by variations in site specific conditions, as well as disturbance characteristics such as fire frequency and severity. Warmer, drier conditions in the region have been associated with a decrease in fire return intervals and greater burn severity that may, in turn, drive conversion of forests to steppe vegetation at a greater rate than has occurred prior to the onset of warming and drying. Stand-replacing fires in Pinus sylvestris stands in southern Siberia may lead to recruitment failure postfire, particularly on southwest to west-facing slopes, which are more often dominated by grasses. This study uses a combination of field data and remotely sensed indices of vegetation and moisture to distinguish between recruitment pathways in southern Siberia, and to study the influence of factors related to soils, topography, fire severity and winter snow cover on these. We expected that recruitment success would be associated with lower burn severity (higher NBR), higher greenness (NDVI) and moisture (NDMI), and winter snow (NDSI) postfire. We also expected phenological characteristics to differ among recruitment paths. Prior to burning, our sites are broadly similar in terms of remotely sensed indices of moisture (NDMI), vegetation (NDVI), and winter fractional snow cover (NDSI), but recruitment failure sites are generally drier and less green postfire. Initial differences in greenness and moisture among sites characterized by abundant recruitment (AR), intermediate recruitment (IR) and recruitment failure (RF) become more pronounced over the initial decades postfire. The earliest separability of AR and RF sites using remotely sensed indices occurs in the winter months 3–4 years postfire, during which time NDSI is highest for AR sites and lowest for RF. Although seasonality was important with regard to distinguishing among AR, IR and RF index values, the timing of phenological events such as start and end of season did not differ significantly among the sites. © 2019 The Authors

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Держатели документа:
Centre for Landscape and Climate Research, School of Geography, Geology and Environment, University of Leicester, University RoadLE1 7RH, United Kingdom
Leicester Institute for Space and Earth Observation, University of Leicester, University RoadLE1 7RH, United Kingdom
Department of Biosciences, University of Durham, South Road, Durham, DH1 3LE, United Kingdom
V.N. Sukachev Institute of Forest of the Siberian Branch of the Russian Academy of Sciences, Separate Subdivision of the FRC KSC SB RAS 660036 Russia, 50/28 Akademgorodok, Krasnoyarsk, Russian Federation
The Branch of FBU VNIILM “Center of Forest Pyrology”, 42 Krupskaya, Krasnoyarsk, 660062, Russian Federation

Доп.точки доступа:
Barrett, K.; Baxter, R.; Kukavskaya, E.; Balzter, H.; Shvetsov, E.; Buryak, L.

    Warming induced changes in wood matter accumulation in tracheid walls of spruce
/ E. Babushkina, D. Zhirnova, L. Belokopytova, E. Vaganov // J. Mt. Sci. - 2020. - Vol. 17, Is. 1. - P16-30, DOI 10.1007/s11629-019-5516-6 . - ISSN 1672-6316
Аннотация: The warming-driven increase of the vegetation season length impacts both net productivity and phenology of plants, changing an annual carbon cycle of terrestrial ecosystems. To evaluate this influence, tree growth along the temperature gradients can be investigated on various organization levels, beginning from detailed climatic records in xylem cells’ number and morphometric parameters. In this study, the Borus Ridge of the Western Sayan Mountains (South Siberia) was considered as a forest area under rapid climate change caused by massive Sayano-Shushenskoe reservoir. Several parameters of the xylem anatomical structure in Siberian spruce (Picea obovata Ledeb.) were derived from normalized tracheidograms of cell radial diameter and cell wall thickness and analyzed during 50 years across elevational gradient (at 520, 960, and 1320 m a.s.l.). On the regional scale, the main warming by 0.42°C per decade occurs during cold period (November–March). Construction of the reservoir accelerated local warming substantially since 1980, when abrupt shift of the cold season temperature by 2.6°C occurred. It led to the vegetation season beginning 3–6 days earlier and ending 4–10 day later with more stable summer heat supply. Two spatial patterns were found in climatic response of maximal cell wall thickness: (1) temperature has maximal impact during 21-day period, and its seasonality shifts with elevation in tune with temperature gradient; (2) response to the date of temperature passing +9.5°C threshold is observed at two higher sites. Climate change yielded significantly bigger early wood spruce tracheids at all sites, but its impact on cell wall deposition process had elevational gradient: maximal wall thickness increased by 7.9% at the treeline, by 18.2% mid-range, and decreased by 4.9% at the lower boundary of spruce growth; normalized total cell wall area increased by 6.2%–6.8% at two higher sites but remained stable at the lowest one. We believe that these patterns are caused by two mechanisms of spruce secondary growth cessation: “emergency” induced by temperature drop versus “regular” one in warmer conditions. Therefore, autumn lengthening of growth season stimulated wood matter accumulation in tracheid walls mainly in cold environment, increasing role of boreal and mountain forests in carbon cycle. © 2020, Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag GmbH Germany, part of Springer Nature.

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Держатели документа:
Khakass Technical Institute, Siberian Federal University, Abakan, 655017, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
SukachevInstitute of Forest, Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Babushkina, E.; Zhirnova, D.; Belokopytova, L.; Vaganov, E.

    Warming induced changes in wood matter accumulation in tracheid walls of spruce
/ E. Babushkina, D. Zhirnova, L. Belokopytova, E. Vaganov // J Mt. Sci. - 2020. - Vol. 17, Is. 1. - P16-30, DOI 10.1007/s11629-019-5516-6. - Cited References:82. - Authors would like to thank administration of the National Park "ShushenskyBor" and personally its director Tolmachev V.A. for providing permission and facilitating field work on the park territory. The research reported in this manuscript is funded by the Russian Foundation for Basic Research (Project No. 17-04-00315, data aquisition and wood anatomy analysis) and Russian Science Foundation (Project No 19-18-00145, analysis of climate change and its impact). . - ISSN 1672-6316. - ISSN 1993-0321
РУБ Environmental Sciences

Аннотация: The warming-driven increase of the vegetation season length impacts both net productivity and phenology of plants, changing an annual carbon cycle of terrestrial ecosystems. To evaluate this influence, tree growth along the temperature gradients can be investigated on various organization levels, beginning from detailed climatic records in xylem cells' number and morphometric parameters. In this study, the Borus Ridge of the Western Sayan Mountains (South Siberia) was considered as a forest area under rapid climate change caused by massive Sayano-Shushenskoe reservoir. Several parameters of the xylem anatomical structure in Siberian spruce (Picea obovata Ledeb.) were derived from normalized tracheidograms of cell radial diameter and cell wall thickness and analyzed during 50 years across elevational gradient (at 520, 960, and 1320 m a.s.l.). On the regional scale, the main warming by 0.42 degrees C per decade occurs during cold period (November-March). Construction of the reservoir accelerated local warming substantially since 1980, when abrupt shift of the cold season temperature by 2.6 degrees C occurred. It led to the vegetation season beginning 3-6 days earlier and ending 4-10 day later with more stable summer heat supply. Two spatial patterns were found in climatic response of maximal cell wall thickness: (1) temperature has maximal impact during 21-day period, and its seasonality shifts with elevation in tune with temperature gradient; (2) response to the date of temperature passing +9.5 degrees C threshold is observed at two higher sites. Climate change yielded significantly bigger early wood spruce tracheids at all sites, but its impact on cell wall deposition process had elevational gradient: maximal wall thickness increased by 7.9% at the treeline, by 18.2% mid-range, and decreased by 4.9% at the lower boundary of spruce growth; normalized total cell wall area increased by 6.2%-6.8% at two higher sites but remained stable at the lowest one. We believe that these patterns are caused by two mechanisms of spruce secondary growth cessation: "emergency" induced by temperature drop versus "regular" one in warmer conditions. Therefore, autumn lengthening of growth season stimulated wood matter accumulation in tracheid walls mainly in cold environment, increasing role of boreal and mountain forests in carbon cycle.

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Держатели документа:
Siberian Fed Univ, Khakass Tech Inst, Abakan 633017, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, SukachevInst Forest, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Babushkina, Elena; Zhirnova, Dina; Belokopytova, Liliana; Vaganov, Eugene; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [17-04-00315]; Russian Science FoundationRussian Science Foundation (RSF) [19-18-00145]

    Postfire recruitment failure in Scots pine forests of southern Siberia
/ K. Barrett, R. Baxter, E. Kukavskaya [et al.] // Remote Sens. Environ. - 2020. - Vol. 237. - Ст. 111539, DOI 10.1016/j.rse.2019.111539. - Cited References:149. - This work was supported by the UK Natural Environment Research Council [grant number NE/N009495/1]. . - ISSN 0034-4257. - ISSN 1879-0704
РУБ Environmental Sciences + Remote Sensing + Imaging Science & Photographic

Аннотация: Wildfire disturbances effect changes in vegetation communities that in turn influence climate. Such changes in boreal forest ecosystems can persist over decadal time scales or longer. In the ecotone between boreal forest and steppe in the region southeast of Lake Baikal in southern Siberia, shifts between the two vegetation types may be precipitated by variations in site specific conditions, as well as disturbance characteristics such as fire frequency and severity. Warmer, drier conditions in the region have been associated with a decrease in fire return intervals and greater burn severity that may, in turn, drive conversion of forests to steppe vegetation at a greater rate than has occurred prior to the onset of warming and drying. Stand-replacing fires in Pinus sylvestris stands in southern Siberia may lead to recruitment failure postfire, particularly on southwest to west-facing slopes, which are more often dominated by grasses. This study uses a combination of field data and remotely sensed indices of vegetation and moisture to distinguish between recruitment pathways in southern Siberia, and to study the influence of factors related to soils, topography, fire severity and winter snow cover on these. We expected that recruitment success would be associated with lower burn severity (higher NBR), higher greenness (NDVI) and moisture (NDMI), and winter snow (NDSI) postfire. We also expected phenological characteristics to differ among recruitment paths. Prior to burning, our sites are broadly similar in terms of remotely sensed indices of moisture (NDMI), vegetation (NDVI), and winter fractional snow cover (NDSI), but recruitment failure sites are generally drier and less green postfire. Initial differences in greenness and moisture among sites characterized by abundant recruitment (AR), intermediate recruitment (IR) and recruitment failure (RF) become more pronounced over the initial decades postfire. The earliest separability of AR and RF sites using remotely sensed indices occurs in the winter months 3-4 years postfire, during which time NDSI is highest for AR sites and lowest for RF. Although seasonality was important with regard to distinguishing among AR, IR and RF index values, the timing of phenological events such as start and end of season did not differ significantly among the sites.

WOS

Держатели документа:
Univ Leicester, Sch Geog Geol & Environm, Ctr Landscape & Climate Res, Univ Rd, Leicester LE1 7RH, Leics, England.
Univ Leicester, Leicester Inst Space & Earth Observat, Univ Rd, Leicester LE1 7RH, Leics, England.
Univ Durham, Dept Biosci, South Rd, Durham DH1 3LE, England.
Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, FRC KSC, 50-28 Akademgorodok, Krasnoyarsk 660036, Russia.
Ctr Forest Pyrol, Branch FBU VNIILM, 42 Krupskaya, Krasnoyarsk 660062, Russia.

Доп.точки доступа:
Barrett, Kirsten; Baxter, Robert; Kukavskaya, Elena; Balzter, Heiko; Shvetsov, Evgeny; Buryak, Ludmila; UK Natural Environment Research CouncilNERC Natural Environment Research Council [NE/N009495/1]

    Consideration of anthropogenic factors in boreal forest fire regime changes during rapid socio-economic development: case study of forestry districts with increasing burnt area in the Sakha Republic, Russia
/ K. Kirillina, E. G. Shvetsov, V. V. Protopopova [et al.] // Environ. Res. Lett. - 2020. - Vol. 15, Is. 3. - Ст. 035009, DOI 10.1088/1748-9326/ab6c6e. - Cited References:49. - The authors gratefully acknowledge financial support from Keio University Doctorate Student Grant-in-Aid Program and Taikichiro Mori Memorial Research Fund. The authors thank the Department of Forestry of Sakha Republic and the regional branch of the Aerial Forest Protection Service for granting access to historical fire data. We also thank two anonymous reviewers for their detailed comments and suggestions. . - ISSN 1748-9326
РУБ Environmental Sciences + Meteorology & Atmospheric Sciences
Рубрики:
CLIMATE
   WILDFIRES

   ALGORITHM

Кл.слова (ненормированные):
boreal forest -- burnt area -- fire regime -- fire seasonality -- climate -- warming

Аннотация: This paper presents an original approach to characterizing historical fire regimes for regions with limited fire data. Fire variables were derived from satellite datasets and regional fire occurrence statistics. They defined the integral elements of a fire regime such as historical trends, spatiotemporal evolution, fire seasonality and causes. Temporal evolution was investigated based on a regime shift detection method developed by Rodionov while changes in the fire regime were analyzed for statistical significance using the Mann-Kendall trend test and Sen's slope estimator. A descriptive analysis was performed to assess fire seasonality, causes, and together formed the basis for this methodology. We validated the proposed approach by assessing historical fire activity in the Sakha Republic (Yakutia), which is one of the most fire-prone regions of Russia. The assessment was conducted with data from the period of 1996-2018. We detected increases in historical fire activity as well as thresholds of change in the fire regime. Changes during the analysis period included lengthening of fire season, increased burned area extent, and extension of peak fire period. Overall, significant changes in the fire regime were detected in the regions strongly affected by warming and increasing anthropogenic alteration.

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Держатели документа:
Keio Univ SFC, Grad Sch Media & Governance, K201,5322 Endo, Fujisawa, Kanagawa 2520882, Japan.
Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Separate Subdiv,FRC,KSC, 50-28 Akad Gorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, 79-10 Svobodny Ave, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Inst Biol Problems Cryolithozone, Lenina St 41, Yakutsk 677077, Russia.
Keio Univ SFC, Fac Environm & Informat Studies, 5322 Endo, Fujisawa, Kanagawa 2520882, Japan.
Keio Univ SFC, Fac Environm & Informat Studies, Grad Sch Media & Governance, 5322 Endo, Fujisawa, Kanagawa 2520882, Japan.

Доп.точки доступа:
Kirillina, Kiunnei; Shvetsov, Evgeny G.; Protopopova, Viktoriya V.; Thiesmeyer, Lynn; Yan, Wanglin; Keio University; Taikichiro Mori Memorial Research Fund

    Effects of typhoon disturbances on seasonal and interannual patterns of litterfall on coniferous and broadleaf plantations in Xitou, central Taiwan
/ C. H. Cheng, C. Y. Lee, H. R. Lee [et al.] // J. For. Res. - 2020, DOI 10.1080/13416979.2020.1762026. - Cited References:44. - This work was supported by the RFBR and MOST [18-54-52005]; Ministry of Science and Technology, Taiwan (TW) [107-2923-B-002-002-MY3]. . - Article in press. - ISSN 1341-6979. - ISSN 1610-7403
РУБ Forestry

Аннотация: Many environmental and climatic disturbances can significantly change the magnitude and pattern of litterfall. This study investigated the effects of typhoon disturbances on the seasonal and interannual patterns of litterfall on coniferous and broadleaf plantation stands in Xitou, central Taiwan. Throughout the study period from 2012 to 2018, typhoon disturbances were recorded in 4 of these 7 years, whereas only minor or even no typhoon disturbances occurred in the other 3 years. Our results demonstrated that the pattern of monthly litterfall varied substantially between the coniferous and broadleaf stands. The coniferous stands exhibited a substantial litterfall pulse due to typhoon disturbances. By contrast, typhoon disturbances exerted a minor impact on the broadleaf stands. The litterfall seasonality of the coniferous stands was higher than that of the broadleaf stands, especially in the years with typhoon disturbances. Furthermore, the yearly variation caused by typhoon disturbances was distinct at the coniferous stands; the annual litterfall mass at the coniferous stands in the years with typhoon disturbances was more than twice as high as that in the years without typhoon disturbances, namely 6,000 kg ha(-1) yr(-1) versus 2,500 kg ha(-1) yr(-1). By contrast, the annual litterfall mass at the broadleaf stands did not differ significantly among the study years. Because of high interannual variation, long-term sampling is essential for accurate estimation of annual litterfall at coniferous stands. For broadleaf plantations, interannual litterfall variation seems less critical, and spatial variability should be considered because of higher variability in terms of site conditions.

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Держатели документа:
Natl Taiwan Univ, Sch Forestry & Resource Conservat, Taipei, Taiwan.
Natl Taiwan Univ, NTU Expt Forest, Nantou, Taiwan.
Inst Forest Res RAI SR, Krasnoyarsk, Russia.

Доп.точки доступа:
Cheng, Chih-Hsin; Lee, Chia-Yi; Lee, Hong-Ru; Chen, Chiou-Pin; Menyailo, Oleg, V; RFBRRussian Foundation for Basic Research (RFBR) [18-54-52005]; MOST [18-54-52005]; Ministry of Science and Technology, Taiwan (TW) [107-2923-B-002-002-MY3]

    Stem growth and stem sap flow measurements of three conifer tree species in Siberia
/ A. Rubtsov, A. Arzac, A. Knorre [et al.] // IOP Conference Series: Earth and Environmental Science : IOP Publishing Ltd, 2020. - Vol. 611: 11th International Conference and Early Career Scientists School on Environmental Observations, Modeling and Information Systems, ENVIROMIS 2020 (7 September 2020 through 11 September 2020, ) Conference code: 166001, Is. 1. - Ст. 012028, DOI 10.1088/1755-1315/611/1/012028 . -
Аннотация: This work is targeted to evaluate the reaction of individual trees against periodic and punctual environmental stressing events with a network of long-term monitoring of tree water/growth-related processes in various geographic and climatic areas. Instrumental measurements of stem circumferential/radial size changes (dRc/dR) using band/point dendrometers and stem sap flow rates (Q) using a trunk segment heat balance method in Scots pine, Siberian larch, and Dahurian larch trees have been carried out at three research sites in Krasnoyarsk Krai, Russia. Analysis of perennial dRc/dR and seasonal Q data obtained in 2015-2019 allows us to characterize the seasonality and features of the tree stem growth and stem water transport rates specific for each of the studied conifer species and on different temporal scales (diurnal, inter/intra-seasonal, and annual). The archived in-situ data are used to verify the efficiency of some process-based BS-and stochastic VS-tree growth and phenology models for Siberian larch and Scots pine trees. The results have confirmed the realistic nature of the simulation and have shown certain drawbacks of these models. © Published under licence by IOP Publishing Ltd.

Scopus

Держатели документа:
Siberian Federal University, Akademgorodok str., 50a k2, Krasnoyarsk, Russian Federation
National Park krasnoyarsk Stolby, Karyernaya srt., 26-a, Krasnoyarsk, Russian Federation
Sukachev Institute of Forest SB RAS, Akademgorodok str., 50/28, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Rubtsov, A.; Arzac, A.; Knorre, A.; Shashkin, A.; Benkova, V.; Vaganov, E.

    Climate variability may delay post-fire recovery of boreal forest in southern siberia, russia
/ Q. Sun, A. Burrell, K. Barrett [et al.] // Remote Sens. - 2021. - Vol. 13, Is. 12. - Ст. 2247, DOI 10.3390/rs13122247 . - ISSN 2072-4292
Аннотация: Prolonged dry periods and increased temperatures that result from anthropogenic climate change have been shown to increase the frequency and severity of wildfires in the boreal region. There is growing evidence that such changes in fire regime can reduce forest resilience and drive shifts in post-fire plant successional trajectories. The response of post-fire vegetation communities to climate variability is under-studied, despite being a critical phase determining the ultimate successional conclusion. This study investigated the responses of post-fire recruited species to climate change and inter-annual variability at 16 study sites that experienced high-severity fire events, mostly in early 2000, within the Scots pine forest-steppe zone of southeastern Siberia, Russia. These sites were originally dominated by Scots pine, and by 2018, they were recruited by different successional species. Additionally, three mature Scots pine stands were included for comparison. A Bayesian Additive Regression Trees (BART) approach was used to model the relationship between Landsat-derived Normalized Difference Vegetation Index (NDVI) time series, temperature and precipitation in the 15 years after a stand-replacing fire. Using the resulting BART models, together with six projected climate scenarios with increased temperature and enhanced inner-annual precipitation variability, we simulated NDVI at 5-year intervals for 15 years post-fire. Our results show that the BART models performed well, with in-sample Pseudo-R2 varying from 0.49 to 0.95 for fire-disturbed sites. Increased temperature enhanced greenness across all sites and across all three time periods since fires, exhibiting a positive feedback in a warming environment. Repeatedly dry spring periods reduced NDVI at all the sites and wetter summer periods following such dry springs could not compensate for this, indicating that a prolonged dry spring has a strong impact consistently over the entire early developmental stages from the initial 5 years to 15 years post-fire. Further, young forests showed higher climate sensitivity compared to the mature forest, irrespective of species and projected climatic conditions. Our findings suggest that a dry spring not only increases fire risk, but also delays recovery of boreal forests in southern Siberia. It also highlights the importance of changing rainfall seasonality as well as total rainfall in a changing climate for post-fire recovery of forest. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Scopus

Держатели документа:
College of Wildlife and Protected Area, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, China
Department of Biosciences, University of Durham, South Road, Durham, DH1 3LE, United Kingdom
Woodwell Climate Research Centre, 149 Woods Hole Road, Falmouth, MA 02540, United States
Centre for Landscape and Climate Research, School of Geography, Geology and Environment, University of Leicester, University Road, Leicester, LE1 7RH, United Kingdom
Leicester Institute for Space and Earth Observation, University of Leicester, University Road, Leicester, LE1 7RH, United Kingdom
V.N. Sukachev Institute of Forest of the Siberian Branch of the Russian Academy of Sciences-Separate Subdivision of the FRC KSC SB RAS, 50/28 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
The Branch of FBU VNIILM “Centre of Forest Pyrology”, 42 Krupskaya, Krasnoyarsk, 660062, Russian Federation
Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarskiy Rabochiy Ave, Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Sun, Q.; Burrell, A.; Barrett, K.; Kukavskaya, E.; Buryak, L.; Kaduk, J.; Baxter, R.

    Climate Variability May Delay Post-Fire Recovery of Boreal Forest in Southern Siberia, Russia
/ Q. Q. Sun, A. Burrell, K. Barrett [et al.] // Remote Sens. - 2021. - Vol. 13, Is. 12. - Ст. 2247, DOI 10.3390/rs13122247. - Cited References:78. - This research was funded by the UK Natural Environment Research Council, grant number NE/N009495/1, awarded to K.B. and R.B. . - ISSN 2072-4292
РУБ Environmental Sciences + Geosciences, Multidisciplinary + Remote Sensing
Рубрики:
PINUS-SYLVESTRIS FOREST
   WILDFIRE DISTURBANCE

   LARCH FOREST

   FIRE

Кл.слова (ненормированные):
boreal forest -- fire -- pine -- recovery -- climate variability -- Landsat -- NDVI -- BART models -- southern Siberia

Аннотация: Prolonged dry periods and increased temperatures that result from anthropogenic climate change have been shown to increase the frequency and severity of wildfires in the boreal region. There is growing evidence that such changes in fire regime can reduce forest resilience and drive shifts in post-fire plant successional trajectories. The response of post-fire vegetation communities to climate variability is under-studied, despite being a critical phase determining the ultimate successional conclusion. This study investigated the responses of post-fire recruited species to climate change and inter-annual variability at 16 study sites that experienced high-severity fire events, mostly in early 2000, within the Scots pine forest-steppe zone of southeastern Siberia, Russia. These sites were originally dominated by Scots pine, and by 2018, they were recruited by different successional species. Additionally, three mature Scots pine stands were included for comparison. A Bayesian Additive Regression Trees (BART) approach was used to model the relationship between Landsat-derived Normalized Difference Vegetation Index (NDVI) time series, temperature and precipitation in the 15 years after a stand-replacing fire. Using the resulting BART models, together with six projected climate scenarios with increased temperature and enhanced inner-annual precipitation variability, we simulated NDVI at 5-year intervals for 15 years post-fire. Our results show that the BART models performed well, with in-sample Pseudo-R-2 varying from 0.49 to 0.95 for fire-disturbed sites. Increased temperature enhanced greenness across all sites and across all three time periods since fires, exhibiting a positive feedback in a warming environment. Repeatedly dry spring periods reduced NDVI at all the sites and wetter summer periods following such dry springs could not compensate for this, indicating that a prolonged dry spring has a strong impact consistently over the entire early developmental stages from the initial 5 years to 15 years post-fire. Further, young forests showed higher climate sensitivity compared to the mature forest, irrespective of species and projected climatic conditions. Our findings suggest that a dry spring not only increases fire risk, but also delays recovery of boreal forests in southern Siberia. It also highlights the importance of changing rainfall seasonality as well as total rainfall in a changing climate for post-fire recovery of forest.

WOS

Держатели документа:
Northeast Forestry Univ, Coll Wildlife & Protected Area, 26 Hexing Rd, Harbin 150040, Peoples R China.
Univ Durham, Dept Biosci, South Rd, Durham DH1 3LE, England.
Woodwell Climate Res Ctr, 149 Woods Hole Rd, Falmouth, MA 02540 USA.
Univ Leicester, Ctr Landscape & Climate Res, Sch Geog Geol & Environm, Univ Rd, Leicester LE1 7RH, Leics, England.
Univ Leicester, Leicester Inst Space & Earth Observat, Univ Rd, Leicester LE1 7RH, Leics, England.
Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Separate Subdiv FRC KSC SB RAS, 50-28 Akad Gorodok, Krasnoyarsk 660036, Russia.
FBU VNIILM Ctr Forest Pyrol, 42 Krupskaya, Krasnoyarsk 660062, Russia.
Reshetnev Siberian State Univ Sci & Technol, 31 Krasnoyarskiy Rabochiy Ave, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Sun, Qiaoqi; Burrell, Arden; Barrett, Kirsten; Kukavskaya, Elena; Buryak, Ludmila; Kaduk, Jorg; Baxter, Robert; UK Natural Environment Research CouncilUK Research & Innovation (UKRI)Natural Environment Research Council (NERC) [NE/N009495/1]

    Climate change and tree growth in the Khakass-Minusinsk Depression (South Siberia) impacted by large water reservoirs
/ D. F. Zhirnova, L. V. Belokopytova, D. M. Meko [et al.] // Sci. Rep. - 2021. - Vol. 11, Is. 1. - Ст. 14266, DOI 10.1038/s41598-021-93745-0 . - ISSN 2045-2322

Кл.слова (ненормированные):
article -- chronology -- climate change -- cooling -- correlation analysis -- dam (barrier) -- habitat -- human -- Larix -- moisture -- nonhuman -- river -- Russian Federation -- Scots pine -- seasonal variation -- summer -- tree growth -- warming -- water supply -- winter

Аннотация: Regional and local climate change depends on continentality, orography, and human activities. In particular, local climate modification by water reservoirs can reach far from shore and downstream. Among the possible ecological consequences are shifts in plant performance. Tree-ring width of affected trees can potentially be used as proxies for reservoir impact. Correlation analysis and t-tests were applied to climatic data and tree-ring chronologies of Pinus sylvestris L. and Larix sibirica Ledeb. from moisture-deficit habitats in the intermontane Khakass-Minusinsk Depression, to assess modification of climate and tree growth by the Krasnoyarsk and Sayano-Shushenskoe Reservoirs on the Yenisei River. Abrupt significant cooling in May–August and warming in September-March occurred after the launch of the turbines in dams, more pronounced near the Sayano-Shushenskoe dam (up to – 0.5 °C in summer and to + 3.5 °C in winter) than near the Krasnoyarsk Reservoir headwaters (– 0.3 °C and + 1.4 °C). Significant lengthening of the warm season was also found for temperature thresholds 0–8 °C. Shifts of seasonality and intensity occurred in climatic responses of all tree-ring chronologies after development of water reservoirs. Patterns of these shifts, however, depended on species-specific sensitivity to climatic modification, distance from reservoirs, and physiographic regions. Mitigation of climate continentality and extremes by reservoirs appears to have offset possible negative effects of warming on tree growth. © 2021, The Author(s).

Scopus

Держатели документа:
Khakass Technical Institute, Siberian Federal University, Abakan, Russian Federation
Laboratory of Tree-Ring Research, University of Arizona, Tucson, United States
Siberian Federal University, Krasnoyarsk, Russian Federation
Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Zhirnova, D. F.; Belokopytova, L. V.; Meko, D. M.; Babushkina, E. A.; Vaganov, E. A.

    Climate change and tree growth in the Khakass-Minusinsk Depression (South Siberia) impacted by large water reservoirs
/ D. F. Zhirnova, L. V. Belokopytova, D. M. Meko [et al.] // Sci Rep. - 2021. - Vol. 11, Is. 1. - Ст. 14266, DOI 10.1038/s41598-021-93745-0. - Cited References:80. - This research was performed within the framework of a state assignment of the Ministry of Science and Higher Education, RF (FSRZ-2020-0010), analysis of data was funded by Russian Science Foundation (19-77-30015). D. Meko's contribution was supported by Office of Polar Programs of National Science Foundation, USA (NSF-OPP #1917503).The authors are grateful to M.A. Bureeva (Khakass Technical Institute, Siberian Federal University) for implementing an algorithm (program not registered) automatically calculating dates of stable temperature crossing of thresholds from daily temperature series. . - ISSN 2045-2322
РУБ Multidisciplinary Sciences

Аннотация: Regional and local climate change depends on continentality, orography, and human activities. In particular, local climate modification by water reservoirs can reach far from shore and downstream. Among the possible ecological consequences are shifts in plant performance. Tree-ring width of affected trees can potentially be used as proxies for reservoir impact. Correlation analysis and t-tests were applied to climatic data and tree-ring chronologies of Pinus sylvestris L. and Larix sibirica Ledeb. from moisture-deficit habitats in the intermontane Khakass-Minusinsk Depression, to assess modification of climate and tree growth by the Krasnoyarsk and Sayano-Shushenskoe Reservoirs on the Yenisei River. Abrupt significant cooling in May-August and warming in September-March occurred after the launch of the turbines in dams, more pronounced near the Sayano-Shushenskoe dam (up to - 0.5 degrees C in summer and to+3.5 degrees C in winter) than near the Krasnoyarsk Reservoir headwaters (- 0.3 degrees C and+1.4 degrees C). Significant lengthening of the warm season was also found for temperature thresholds 0-8 degrees C. Shifts of seasonality and intensity occurred in climatic responses of all tree-ring chronologies after development of water reservoirs. Patterns of these shifts, however, depended on species-specific sensitivity to climatic modification, distance from reservoirs, and physiographic regions. Mitigation of climate continentality and extremes by reservoirs appears to have offset possible negative effects of warming on tree growth.

WOS

Держатели документа:
Siberian Fed Univ, Khakass Tech Inst, Abakan, Russia.
Univ Arizona, Lab Tree Ring Res, Tucson, AZ USA.
Siberian Fed Univ, Krasnoyarsk, Russia.
Sukachev Inst Forest SB RAS, Krasnoyarsk, Russia.

Доп.точки доступа:
Zhirnova, D. F.; Belokopytova, L., V; Meko, D. M.; Babushkina, E. A.; Vaganov, E. A.; Russian Science FoundationRussian Science Foundation (RSF) [19-77-30015]; Office of Polar Programs of National Science Foundation, USA (NSF-OPP) [1917503]