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

[Text] / A. . Rodionov [et al.] // Eur. J. Soil Sci. - 2007. - Vol. 58, Is. 6. - P1260-1272, DOI 10.1111/j.1365-2389.2007.00919.x. - Cited References: 44 . - 13. - ISSN 1351-0754РУБ Soil Science

Аннотация: Soils of the high latitudes are expected to respond sensitively to climate change, but still little is known about carbon and nitrogen variability in them. We investigated the 0.44-km(2) Little Grawijka Creek catchment of the forest tundra ecotone (northern Krasnoyarsk Krai, Russian Federation) in order (i) to relate the active-layer thickness to controlling environmental factors, (ii) to quantify soil organic carbon (SOC) and total nitrogen (NT) stocks, and (iii) to assess their variability with respect to different landscape units. The catchment was mapped on a 50 x 50 m grid for topography, dominant tree and ground vegetation, organic-layer and moss-layer thickness, and active-layer thickness. At each grid point, bulk density, and SOC and NT concentrations were determined for depth increments. At three selected plots, 2-m deep soil cores were taken and analysed for SOC, NT and C-14. A shallow active layer was found in intact raised bogs at plateaux situations and in mineral soils of north-northeast (NNE) aspect. Good drainage and greater solar insolation on the south-southwest (SSW) slopes are reflected in deeper active layers or lack of permafrost. Organic carbon stocks to a soil depth of 90 cm varied between 5 and 95 kg m(-2). The greatest stocks were found in the intact raised bogs and on the NNE slopes. Canonical correspondence analysis indicates the dominant role of active-layer thickness for SOC and NT storage. The 2-m soil cores suggest that permafrost soils store about the same amount of SOC from 90 to 200 cm as in the upper 90 cm. Most of this deep SOC pool was formed in the mid-Holocene (organic soils) and the late Pleistocene (mineral soils). Our results showed that even within a small catchment of the forest tundra, active-layer thickness and, hence, SOC and NT storage vary greatly within the landscape mosaic. This has to be taken into account when using upscaling methods such as remote sensing for assessing SOC and NT storage and cycling at a regional to continental level.

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Держатели документа:
Univ Halle Wittenberg, Inst Agr & Ernahrungswissensch, D-06108 Halle, Germany
Univ Gottingen, Inst Bodenkunde & Waldernahrung, D-37077 Gottingen, Germany
Max Planck Inst Biogeochem, D-07745 Jena, Germany
SB RAS, Field Stn Igarka Permafrost Inst Yakutsk, Igarka 663200, Russia
SB RAS, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Rodionov, A...; Flessa, H...; Grabe, M...; Kazansky, O.A.; Shibistova, O...; Guggenberger, G...

[Текст] / T. R. Iskhakov [и др.] // Biofizika. - 2007. - Vol. 52, Is. 4. - С. 753-759. - Cited References: 23 . - 7. - ISSN 0006-3029РУБ Biophysics

Аннотация: A model of the population dynamics of insects has been developed, which takes into account the food consumption by insects and the reaction of food plants to the damage. Equations have been derived that describe the relationship between the coefficient of insect reproduction, the weight of females, the energetic effectiveness of the food consumption by insects, and the reaction of food plants. The scenarios of population outbreaks have been analyzed as a function of the weight of females in the stable state. The results of modeling have been compared with the data of natural observations.

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Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Int Sci Ctr Studies Organism Extreme States, Sibirian Div, Akademgorodok 660036, Russia
Russian Acad Sci, Sukachev Inst Forest, Sibirian Div, Akademgorodok 660036, Russia
Siberian State Technol Univ, Krasnoyarsk 660049, Russia

Доп.точки доступа:
Iskhakov, T.R.; Soukhovolsky, V.G.; Ovchinnikova, T.M.; Tarasova, O...

[Text] / O. V. Menyailo, B. A. Hungate, W. . Zech // Plant Soil. - 2002. - Vol. 242, Is. 2. - P171-182, DOI 10.1023/A:1016290802518. - Cited References: 30 . - 12. - ISSN 0032-079XРУБ Agronomy + Plant Sciences + Soil Science

Аннотация: Natural and human-induced changes in the composition of boreal forests will likely alter soil properties, but predicting these effects requires a better understanding of how individual forest species alter soils. We show that 30 years of experimental afforestation in Siberia caused species-specific changes in soil chemical properties, including pH, DOC, DON, Na+,NH4+, total C, C/N, Mn2+, and SO42-. Some of these properties-pH, total C, C/N, DOC, DON, Na+-also differed by soil depth, but we found no strong evidence for species-dependent effects on vertical differentiation of soil properties (i.e., no species x depth interaction). A number of soil properties-NO3-, N, Al3+, Ca2+, Fe3+, K+, Mg2+ and Cl- -responded to neither species nor depth. The six studied species may be clustered into three groups based on their effects on the soil properties. Scots pine and spruce had the lowest pH, highest C/N ratio and intermediate C content in soil. The other two coniferous species, Arolla pine and larch, had the highest soil C contents, highest pH values, and intermediate C/N ratios. Finally, the two deciduous hardwood species, aspen and birch, had the lowest C/N ratio, intermediate pH values, and lowest C content. These tree-mediated soil chemical changes are important for their likely effects on soil microbiological activities, including C and N mineralization and the production and consumption of greenhouse gases.

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Полный текст,
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Держатели документа:
Inst Forest SB RAS, Krasnoyarsk 660036, Russia
No Arizona Univ, Dept Sci Biol, Flagstaff, AZ 86001 USA
No Arizona Univ, Merriam Powell Ctr Environm Res, Flagstaff, AZ 86001 USA
Univ Bayreuth, Inst Soil Sci & Soil Geog, D-95447 Bayreuth, Germany

Доп.точки доступа:
Menyailo, O.V.; Hungate, B.A.; Zech, W...

/ A. V. Bogorodskaya, A. S. Shishikin // Eurasian Soil Sci. - 2020. - Vol. 53, Is. 1. - P126-136, DOI 10.1134/S1064229320010056. - Cited References:46. - This work was performed according to the basic project (AAAA-A17-117101940014-9). . - ISSN 1064-2293. - ISSN 1556-195XРУБ Soil Science

Аннотация: The dynamics, structure, and functional activity of microbial biomass have been studied in soils of felling areas in southern taiga fir forests (the Yenisei Ridge, Krasnoyarsk krai), which are at different stages of natural regenerative successions. The top organomineral horizons of soddy-podzolic soil (Albic Glossic Retisol (Loamic, Cutanic, Ochric)) of the after-felling regeneration succession (with the stage of secondary birch forests) is characterized by an increase in the content of carbon of microbial biomass (C-mic) and in the intensity of basal respiration from new felling to the stage of dense young forest. In the soil of the dense young-wood stage, the total reserves of C-mic (170 g C/m(3)) and microbial CO2 production (528 mg CO2-C/m(3) per hour) are the highest and exceed the control by 80-85%. In the humus-accumulative soil horizon of the studied succession series, there is a tendency for a decrease in the portion of fungal substrate-induced respiration and in the fungi to bacteria ratio in comparison with the control. In the middle-aged deciduous forests with dark-coniferous undergrowth, all the considered parameters of microbial complexes decrease but remain higher than the control. A trend for a decrease in C-mic and basal respiration is revealed in the profile of soddy-podzolic soil of the regeneration series without species change over an eight-year period. At the stage of fir dense young forest, all ecological-functional parameters of the microbial complex become closer to the control small-grass-true-moss fir forest.

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

Доп.точки доступа:
Bogorodskaya, A. V.; Shishikin, A. S.; [AAAA-A17-117101940014-9]