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

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Найдено документов в текущей БД: 11

    Analysis of soil-climatic relationships on the basis of the soil map and the BIOME database
/ N. I. Belousova, D. I. Nazimova, N. M. Andreeva // Eurasian Soil Sci. - 2012. - Vol. 45, Is. 2. - P109-118, DOI 10.1134/S1064229312020056. - Cited References: 25. - This study was supported by the Russian Foundation for Basic Research, project nos. 08-00600a and 11-04-02089a. . - 10. - ISSN 1064-2293
РУБ Soil Science

Аннотация: The analysis of soil-climatic relationships was performed on the basis of the BIOME database on climate and vegetation created by the V.N. Sukachev Institute of Forestry (Siberian Branch of the Russian Academy of Sciences) and the Soil Map of the Russian Federation (1: 2.5 M scale) for the southern part of the boreal zone of Siberia. Climatic parameters (accumulated daily temperatures above 10A degrees C, continentality of the climate, and humidity of the climate) specifying the development of major types of mesomorphic soils on this territory were determined. The climatic contacts between different soil groups were established. The soil diversity in climatic ecotones was characterized. The criteria of steady and unsteady position of soils in the space of climatic coordinates were analyzed, and the measure of the climatic sensitivity of soils was suggested.

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Держатели документа:
[Belousova, N. I.] Russian Acad Agr Sci, Dokuchaev Soil Sci Inst, Moscow 119017, Russia
[Nazimova, D. I.] Russian Acad Sci, Sukachev Inst Forestry, Siberian Branch, Krasnoyarsk 660036, Russia
[Andreeva, N. M.] Siberian Fed Univ, Inst Math, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Belousova, N.I.; Nazimova, D.I.; Andreeva, N.M.

    Reconstruction of the mid-Holocene palaeoclimate of Siberia using a bioclimatic vegetation model
[Text] / R. A. Monserud, N. M. Tchebakova, O. V. Denissenko // Paleogeogr. Paleoclimatol. Paleoecol. - 1998. - Vol. 139, Is. 01.02.2013. - P15-36, DOI 10.1016/S0031-0182(97)00127-2. - Cited References: 72 . - 22. - ISSN 0031-0182
РУБ Geography, Physical + Geosciences, Multidisciplinary + Paleontology

Аннотация: A bioclimatic vegetation model is used to reconstruct the palaeoclimate of Siberia during the mid-Holocene, a warm. moist period also known as the Holocene climatic optimum. Our goal is to determine the magnitude of climatic anomalies associated with mapped changes in vegetation classes. Reconstructed anomalies are the logical outcome of the bioclimatic assumptions in the Siberia vegetation model operating on location-specific differences in the palaeomap of Khotinsky and the modern map of Isachenko. The Siberian vegetation model specifics the relationship between vegetation classes and climate using climatic indices (growing-degree days, dryness index, continentality index). These indices are then converted into parameters commonly used in climatic reconstructions: January and July mean temperatures. and annual precipitation. Climatic anomalies since the mid-Holocene are then displayed by latitude and longitude. An advantage of a model-based approach to climatic reconstruction is that grid cells can be modelled independently. without the need for interpolation to create smoothed temperature and precipitation contours. The resulting pattern of anomalies is complex. On average. Siberian winters in the mid-Holocene were 3.7 degrees C warmer than now, with greater warming in higher latitudes. The major winter warming was concentrated in the Taiga zone on the plains and tablelands of East Siberia, where a warm and moist climate was necessary to support a broad expanse of shade-tolerant dark-needled Taiga. January temperatures averaged about 1 degrees C warmer than now across southern Siberia. although large areas show no change. July temperature anomalies (0-5 degrees C) are distributed mostly latitudinally, with anomalies increasing with latitude above 65 degrees N. At latitudes below 65 degrees N, July temperature was nearly the same as today across Siberia. Based on July temperatures. Siberian summers in the mid-Holocene were 0.7 degrees C warmer than today's. Annual precipitation in Siberia was predicted to be 95 mm greater in the mid-Holocene than now. Most of the increase was concentrated in East Siberia (154 mm average increase). The precipitation anomalies are small in the south. Large precipitation anomalies are found in central and northeastern Siberia. This location corresponds rather closely to the large anomalies in January temperature in East Siberia. The annual precipitation Increase was > 200 mm more than present precipitation in Yakutia. This increase corresponds to the deep penetration of moisture-demanding dark-needled species (Pinus sibirica. Abies sibirica, Picea obovata) into East Siberia in the mid-Holocene, where currently only drought-resistant light-needled species (Larix spp.) are found. Another area of increased precipitation was along the Polar Circle in West Siberia and at the base of the Taymyr Peninsula in East Siberia. In combination with 2-5 degrees C warmer summers, moister climates there allowed forests to advance far northward into what is now the Tundra zone.

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Scopus

Держатели документа:
Forest Serv, Rocky Mt Res Stn, USDA, Portland, OR 97205 USA
Forest Serv, Pacific NW Res Stn, USDA, Portland, OR 97205 USA
Russian Acad Sci, Siberian Branch, Sukachev Forest Inst, Krasnoyarsk 660036, Russia
Moscow State Univ, Dept Geog, Moscow 119899, Russia

Доп.точки доступа:
Monserud, R.A.; Tchebakova, N.M.; Denissenko, O.V.

    A SIBERIAN VEGETATION MODEL-BASED ON CLIMATIC PARAMETERS
[Text] / N. M. TCHEBAKOVA, R. A. MONSERUD, D. I. NAZIMOVA // Can. J. For. Res.-Rev. Can. Rech. For. - 1994. - Vol. 24, Is. 8. - P1597-1607, DOI 10.1139/x94-208. - Cited References: 50 . - 11. - ISSN 0045-5067
РУБ Forestry
Рубрики:
BUDYKO

Аннотация: A model for predicting the spatial distribution of the major vegetation zones in Siberia is developed from bioclimatological considerations. Driving variables are growing degree-days (5 degrees C base), Budyko's dryness index, and Conrad's continentality index. Because these indices reflect the underlying climatic factors determining plants' requirements for warmth, drought resistance, and cold tolerance, they define the main features of vegetation zonation. Climatic inputs (monthly mean temperature, precipitation, vapor pressure, cloudiness, and albedo) are obtained from a global climatic database, supplemented by additional weather stations in Siberia; resolution is 0.5 degrees longitude by 0.5 degrees latitude. The performance of the model is examined by comparing our Siberian vegetation predictions with the landscape map of the USSR by Isachenko, a map that was not used for model development. The patterns of vegetation predicted by the Siberian vegetation model generally match well with the vegetation patterns on Isachenko's map. The general locations of all vegetation zones are predicted correctly. This visual impression is also borne out statistically, with K-statistics for judging agreement between the maps showing good agreement (0.55 kappa 0.7) at all scales of comparison (from 0.5 degrees by 0.5 degrees pixels to 5 degrees by 5 degrees blocks of pixels). The model is also useful for estimating the change in equilibrium conditions due to hypothesized events such as CO2-induced global warming, for retrospective comparisons using the paleorecord, and for carbon budget assessment.

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Держатели документа:
UNIV IDAHO,USDA ARS,US FOREST SERV,INTERMT RES STN,MOSCOW,ID 83843
RUSSIAN ACAD SCI,INST FOREST,KRASNOYARSK 660036,RUSSIA

Доп.точки доступа:
TCHEBAKOVA, N.M.; MONSERUD, R.A.; NAZIMOVA, D.I.

    Forest vegetation zones of southern Siberia and current climate change
/ D. I. Nazimova, V. G. Tsaregorodtsev, N. M. Andreyeva // Geography and Natural Resources. - 2010. - Vol. 31, Is. 2. - P124-131, DOI 10.1016/j.gnr.2010.06.006 . - ISSN 1875-3728

Кл.слова (ненормированные):
Climate trend -- Climatic ordination -- Forest-forming species -- Sector -- Southern Siberia -- Zone -- biome -- climate change -- risk factor -- spatiotemporal analysis -- steppe -- succession -- vegetation cover -- Siberia

Аннотация: Data from the " Biome" information system were used to construct an ordination of zonal categories of vegetation cover in southern Siberia along the axes of heat supply and continentality. The changes of climate that occurred from the end of the 1960. s to 2007 are estimated. It is shown that they can lead to transformation of the composition of potential forest vegetation in a number of regions. We discuss the forecasted and observed variants of long-term successions in different sectoral-zonal classes of subtaiga and forest-steppe, including the risk of a reduction in the areas of separate forest-forming species. В© 2010.

Scopus

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

Доп.точки доступа:
Nazimova, D.I.; Tsaregorodtsev, V.G.; Andreyeva, N.M.

    Forest zones of Siberia as determined by climatic zones and their possible transformation trends under global change
/ D. I. Nazimova, N. P. Polikarpov // Silva Fennica. - 1996. - Vol. 30, Is. 2-3. - P201-208 . - ISSN 0037-5330

Кл.слова (ненормированные):
Climatic ordinations -- Modelling -- Siberia -- Zonal forest types -- climatic change -- continentality -- forest zone -- Russian Federation, Siberia

Аннотация: A system of zonality in Siberia has been formed under the control of continentality, which provides the heat and humidity regimes of the forest provinces. Three sectors of continentality and four to six boreal subzones form a framework for the systematisation of the different features of land cover in Siberia. Their climatic ordination provides the fundamental basis for the principal potential forest types (composition, productivity) forecasting the current climate. These are useful in predicting the future transformations and successions under global changes.

Scopus

Держатели документа:
V. N. Sukhachev Institute of Forest, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Nazimova, D.I.; Polikarpov, N.P.

    Change in Siberian phytomass predicted for global warming
/ R. A. Monserud [et al.] // Silva Fennica. - 1996. - Vol. 30, Is. 2-3. - P185-200 . - ISSN 0037-5330
Аннотация: An equilibrium model driven by climatic parameters, the Siberian Vegetation Model, was used to estimate changes in the phytomass of Siberian vegetation under climate change scenarios (CO2 doubling) from four general circulation models (GCM's) of the atmosphere. Ecosystems were classified using a three-dimensional climatic ordination of growing degree days (above a 5В°C threshold), Budyko's dryness index (based on radiation balance and annual precipitation), and Conrad's continentality index. Phytomass density was estimated using published data of Bazilevich covering all vegetation zones in Siberia. Under current climate, total phytomass of Siberia is estimated to be 74.1 В± 2.0 Pg (Petagram = 1015 g). Note that this estimate is based on the current forested percentage in each vegetation class compiled from forest inventory data. Moderate warming associated with the GISS (Goddard Institute for Space Studies) and OSU (Oregon State Univ.) projections resulted in a 23-26 % increase in phytomass (to 91.3 В± 2.1 Pg and 93.6 В± 2.4 Pg, respectively), primarily due to an increase in the productive Southern Taiga and Subtaiga classes. Greater warming associated with the GFDL (General Fluid Dynamics Laboratory) and UKMO (United Kingdom Meteorological Office) projections resulted in a small 3-7 % increase in phytomass (to 76.6 В± 1.3 Pg and 79.6 В± 1.2 Pg, respectively). A major component of predicted changes using GFDL and UKMO is the introduction of a vast Temperate Forest-Steppe class covering nearly 40 % of the area of Siberia, at the expense of Taiga; with current climate, this vegetation class is nearly non-existent in Siberia. In addition, Subboreal Forest-Steppe phytomass doubles with all GCM predictions. In all four climate change scenarios, the predicted phytomass stock of all colder, northern classes is reduced considerably (viz., Tundra, Forest-Tundra, Northern Taiga, and Middle Taiga). Phytomass in Subtaiga increases greatly with all scenarios, from a doubling with GFDL to quadrupling with OSU and GISS. Overall, phytomass of the Taiga biome (Northern, Middle, Southern, and Subtaiga) increased 15 % in the moderate OSU and GISS scenarios and decreased by a third in the warmer UKMO and GFDL projections. In addition, a sensitivity analysis found that the percentage of a vegetation class that is forested is a major factor determining phytomass distribution. From 25 to 50 % more phytomass is predicted under climate change if the forested proportion corresponding to potential rather than current vegetation is assumed.

Scopus

Держатели документа:
Intermountain Research Station, USDA Forest Service, 1221 S. Main St., Moscow, ID 83843, United States
Forest Institute, Russian Academy of Sciences, Akademgorodok, 660036 Krasnoyarsk, Russian Federation
Department of Civil Engineering, Oregon State University, Corvallis, OR 97333, United States
Department of Geography, Moscow State University, 119899 Moscow, Russian Federation

Доп.точки доступа:
Monserud, R.A.; Tchebakova, N.M.; Kolchugina, T.P.; Denissenko, O.V.

    Climatic factors controlling Pinus sylvestris radial growth along a transect of increasing continentality in southern Siberia
/ M. A. Tabakova, A. Arzac, E. Martinez, A. V. Kirdyanov // Dendrochronologia. - 2020. - Vol. 62. - Ст. 125709, DOI 10.1016/j.dendro.2020.125709 . - ISSN 1125-7865

Кл.слова (ненормированные):
Drought -- Earlywood -- Forest-Steppe -- Latewood -- Radial growth -- SPEI -- climate change -- climate conditions -- coniferous tree -- environmental factor -- forest-steppe -- growing season -- growth -- transect -- tree ring -- Siberia -- Pinus sylvestris

Аннотация: The forest-steppe ecotone in southern Siberia is characterized by a strong dependence of tree growth on summer drought, which is expected to increase under ongoing climate change, with potential consequences for regional and global water and carbon cycles. Since climate conditions control tree secondary growth throughout the growing season, it is assumed that climate change will differently impact the formation of particular tree-ring sectors. In this study, we evaluated spatiotemporal trends in Pinus sylvestris L. tree-ring traits: tree-ring (RW), earlywood (EW) and latewood (LW) widths, as well as their climate response in order to understand potential reactions of P. sylvestris radial growth to climate change along a 4900 km longitudinal transect of increasing continentality in southern Siberia. Results indicated an increasing tree radial growth from the West to the East along the transect. Tree-ring parameters were sensitive to drought, showing a temporal delay in the climatic signals of LW (summer) relative to EW (spring). Climate control of tree growth was stronger at the western site, while it was alleviated over time in eastern sites. This study highlighted the wide plasticity of P. sylvestris to thrive within a wide range of climatic conditions, also suggesting that future drought, as predicted by climate change simulations, will potentially impact P. sylvestris growth differently along the studied gradient, being more susceptible at the western sites due to the current growth limitation. © 2020 Elsevier GmbH

Scopus

Держатели документа:
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation
V.N. Sukachev Institute of Forest SB RAS, Federal Research Center ‘Krasnoyarsk Science Center SB RAS’, Akademgorodok 50/28, Krasnoyarsk, 660036, Russian Federation
Department of Geography, University of CambridgeCB2 3EN, United Kingdom

Доп.точки доступа:
Tabakova, M. A.; Arzac, A.; Martinez, E.; Kirdyanov, A. V.

    Climatic factors controlling Pinus sylvestris radial growth along a transect of increasing continentality in southern Siberia
/ M. A. Tabakova, A. Arzac, E. Martinez, A. V. Kirdyanov // Dendrochronologia. - 2020. - Vol. 62. - Ст. 125709, DOI 10.1016/j.dendro.2020.125709. - Cited References:66. - This work was carried out on the basis of the Laboratory for integral studies of forest dynamics of Eurasia"of the Siberian Federal University [FSRZ-2020-0014], with financial support from the Russian Science Foundation [Grant 18-14-00072]. We thank to V. Kukarskih, L. Agafonov, V. Voronin and N. Bykov for the support during fieldwork, JM Olano for his assistance with the GAMM and recommendations on the manuscript and to the anonymous reviewers for their comments and suggestions, which significantly improved the manuscript. . - ISSN 1125-7865. - ISSN 1612-0051
РУБ Forestry + Geography, Physical
Рубрики:
WATER-USE EFFICIENCY
   WOOD FORMATION

   FOREST-STEPPE

   TREE GROWTH

Кл.слова (ненормированные):
Drought -- Earlywood -- Forest-Steppe -- Latewood -- Radial growth -- SPEI

Аннотация: The forest-steppe ecotone in southern Siberia is characterized by a strong dependence of tree growth on summer drought, which is expected to increase under ongoing climate change, with potential consequences for regional and global water and carbon cycles. Since climate conditions control tree secondary growth throughout the growing season, it is assumed that climate change will differently impact the formation of particular tree-ring sectors. In this study, we evaluated spatiotemporal trends in Pinus sylvestris L. tree-ring traits: tree-ring (RW), earlywood (EW) and latewood (LW) widths, as well as their climate response in order to understand potential reactions of P. sylvestris radial growth to climate change along a 4900 km longitudinal transect of increasing continentality in southern Siberia. Results indicated an increasing tree radial growth from the West to the East along the transect. Tree-ring parameters were sensitive to drought, showing a temporal delay in the climatic signals of LW (summer) relative to EW (spring). Climate control of tree growth was stronger at the western site, while it was alleviated over time in eastern sites. This study highlighted the wide plasticity of P. sylvestris to thrive within a wide range of climatic conditions, also suggesting that future drought, as predicted by climate change simulations, will potentially impact P. sylvestris growth differently along the studied gradient, being more susceptible at the western sites due to the current growth limitation.

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Держатели документа:
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.
Krasnoyarsk Sci Ctr SB RAS, Fed Res Ctr, VN Sukachev Inst Forest SB RAS, Akademgorodok 50-28, Krasnoyarsk 660036, Russia.
Univ Cambridge, Dept Geog, Cambridge CB2 3EN, England.

Доп.точки доступа:
Tabakova, Maria A.; Arzac, Alberto; Martinez, Eduardo; Kirdyanov, Alexander, V; Russian Science FoundationRussian Science Foundation (RSF) [18-14-00072]

    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]

    Lignin Preservation and Microbial Carbohydrate Metabolism in Permafrost Soils
/ T. T. Dao, R. Mikutta, L. Sauheitl [et al.] // J. Geophys. Res.-Biogeosci. - 2022. - Vol. 127, Is. 1. - Ст. e2020JG006181, DOI 10.1029/2020JG006181. - Cited References:122. - Financial support was provided by the German Federal Ministry of Education and Research (03F0616A) within the ERANET EUROPOLAR project CryoCARB. T.T. Dao is grateful for financial support from Vietnamese Education, O. Shibistova acknowledges funding from the National Science Foundation of China and Russian Foundation for Basic Research (NSFC-RFBR joint project No 19-54-53026), and A. Richter, B. Wild and J. Schnecker appreciate the financial support from the Austrian Science Fund (FWF - I370-B17). We thank all members of the CryoCARB project team for their incredible team spirit. We are grateful to the technical staff of the Institute of Soil Science in Hannover for great laboratory assistance. Open access funding enabled and organized by Projekt DEAL. . - ISSN 2169-8953. - ISSN 2169-8961
РУБ Environmental Sciences + Geosciences, Multidisciplinary

Аннотация: Permafrost-affected soils in the northern circumpolar region store more than 1,000 Pg soil organic carbon (OC), and are strongly vulnerable to climatic warming. However, the extent to which changing soil environmental conditions with permafrost thaw affects different compounds of soil organic matter (OM) is poorly understood. Here, we assessed the fate of lignin and non-cellulosic carbohydrates in density fractionated soils (light fraction, LF vs. heavy fraction, HF) from three permafrost regions with decreasing continentality, expanding from east to west of northern Siberia (Cherskiy, Logata, Tazovskiy, respectively). In soils at the Tazovskiy site with thicker active layers, the LF showed smaller OC-normalized contents of lignin-derived phenols and plant-derived sugars and a decrease of these compounds with soil depth, while a constant or even increasing trend was observed in soils with shallower active layers (Cherskiy and Logata). Also in the HF, soils at the Tazovskiy site had smaller contents of OC-normalized lignin-derived phenols and plant-derived sugars along with more pronounced indicators of oxidative lignin decomposition and production of microbial-derived sugars. Active layer deepening, thus, likely favors the decomposition of lignin and plant-derived sugars, that is, lignocelluloses, by increasing water drainage and aeration. Our study suggests that climate-induced degradation of permafrost soils may promote carbon losses from lignin and associated polysaccharides by abolishing context-specific preservation mechanisms. However, relations of OC-based lignin-derived phenols and sugars in the HF with mineralogical properties suggest that future OM transformation and carbon losses will be modulated in addition by reactive soil minerals.

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Держатели документа:
Leibniz Univ Hannover, Inst Soil Sci, Hannover, Germany.
Martin Luther Univ Halle Wittenberg, Soil Sci & Soil Protect, Halle, Germany.
VN Sukachev Inst Forest, Krasnoyarsk, Russia.
Univ Vienna, Dept Microbiol & Ecosyst Sci, Vienna, Austria.
Stockholm Univ, Dept Environm Sci & Analyt Chem, Stockholm, Sweden.
Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden.
Univ South Bohemia, Dept Ecosyst Biol, Ceske Budejovice, Czech Republic.
Univ South Bohemia, Fac Sci, Ctr Polar Ecol, Ceske Budejovice, Czech Republic.
Univ Bergen, Ctr Geobiol, Dept Biol, Bergen, Norway.
Ctr Geomicrobiol, Dept Biosci, Aarhus, Denmark.
Russian Acad Sci, Cent Siberian Bot Garden, Siberian Branch, Novosibirsk, Russia.
Ernst Moritz Arndt Univ, Inst Microbiol, Greifswald, Germany.
Austrian Polar Res Inst, Vienna, Austria.

Доп.точки доступа:
Dao, Thao Thi; Mikutta, Robert; Sauheitl, Leopold; Gentsch, Norman; Shibistova, Olga; Wild, Birgit; Schnecker, Joerg; Barta, Jiri; Capek, Petr; Gittel, Antje; Lashchinskiy, Nikolay; Urich, Tim; Santruckova, Hana; Richter, Andreas; Guggenberger, Georg; German Federal Ministry of Education and Research within the ERANET EUROPOLAR project CryoCARB [03F0616A]; Vietnamese Education; National Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [19-54-53026]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-54-53026]; Austrian Science FundAustrian Science Fund (FWF) [FWF - I370-B17]; Projekt DEAL