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

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Найдено документов в текущей БД: 15

    The effect of afforestation on mineralization of soil organic matter
[Text] / O. V. Menyailo // Russ. J. Ecol. - 2008. - Vol. 39, Is. 1. - P21-25, DOI 10.1134/S1067413608010049. - Cited References: 10 . - 5. - ISSN 1067-4136
РУБ Ecology

Аннотация: The effect of afforestation on the activity of microbiological mineralization of soil organic matter has been studied in Siberia. The results show that this effect concerns mainly net nitrogen mineralization and net nitrification, while carbon mineralization (CO2 formation) does not depend on the type of ecosystem. It is proposed to use the rates of net nitrogen mineralization and nitrification as the most sensitive indicators of changes in an ecosystem.

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

Доп.точки доступа:
Menyailo, O.V.

    Microbial characteristics of soils on a latitudinal transect in Siberia
[Text] / H. . Santruckova [et al.] // Glob. Change Biol. - 2003. - Vol. 9, Is. 7. - P1106-1117, DOI 10.1046/j.1365-2486.2003.00596.x. - Cited References: 47 . - 12. - ISSN 1354-1013
РУБ Biodiversity Conservation + Ecology + Environmental Sciences

Аннотация: Soil microbial properties were studied from localities on a transect along the Yenisei River, Central Siberia. The 1000 km-long transect, from 56degreesN to 68degreesN, passed through tundra, taiga and pine forest characteristic of Northern Russia. Soil microbial properties were characterized by dehydrogenase activity, microbial biomass, composition of microbial community (PLFAs), respiration rates, denitrification and N mineralization rates. Relationships between vegetation, latitude, soil quality (pH, texture), soil organic carbon (SOC) and the microbial properties were examined using multivariate analysis. In addition, the temperature responses of microbial growth (net growth rate) and activity (soil respiration rate) were tested by laboratory experiments. The major conclusions of the study are as follows: 1. Multivariate analysis of the data revealed significant differences in microbial activity. SOC clay content was positively related to clay content. Soil texture and SOC exhibited the dominant effect on soil microbial parameters, while the vegetation and climatic effects (expressed as a function of latitude) were weaker but still significant. The effect of vegetation cover is linked to SOC quality, which can control soil microbial activity. 2. When compared to fine-textured soils, coarse-textured soils have (i) proportionally more SOC bound in microbial biomass, which might result in higher susceptibility of SOC transformation to fluctuation of environmental factors, and (ii) low mineralization potential, but with a substantial part of the consumed C being transformed to microbial products. 3. The soil microbial community from the northernmost study region located within the permafrost zone appears to be adapted to cold conditions. As a result, microbial net growth rate became negative when temperature rose above 5 degreesC and C mineralization then exceeded C accumulation.

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Держатели документа:
AS CR, Inst Soil Biol, CZ-37005 Ceske Budejovice, Czech Republic
Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia
Australian Natl Univ, Res Sch Biol Sci, Canberra, ACT 0200, Australia
Russian Acad Sci, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Severtsovs Inst Ecol & Evolut Problems, Moscow 117071, Russia
Max Planck Inst Biogeochem, D-07701 Jena, Germany

Доп.точки доступа:
Santruckova, H...; Bird, M.I.; Kalaschnikov, Y.N.; Grund, M...; Elhottova, D...; Simek, M...; Grigoryev, S...; Gleixner, G...; Arneth, A...; Schulze, E.D.; Lloyd, J...

    Denitrification potential andCO(2) emission in the northern forest soils of the Yenisei meridian (the Siberian IGBP transect)
[Text] / O. V. Menyailo, Y. N. Krasnoshchekov // Biol. Bull. - 2003. - Vol. 30, Is. 3. - P299-303, DOI 10.1023/A:1023872215777. - Cited References: 20 . - 5. - ISSN 1062-3590
РУБ Biology

Аннотация: To estimate the probable contribution of northern forest soils to the global budget of greenhouse microgases. the cryogenic soils along the Yenisei meridian have been studied with respect to their potential denitrification and carbon mineralization activities. It is shown that the forest soils of the boreal zone have a high denitrification potential and, under conditions of a high nitrate nitrogen content, may be a source of nitrous c oxide emission. A significant correlation is observed between N2O and CO2 emissions (r = 0.85, p 0.001).

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Держатели документа:
Russian Acad Sci, Sukachev Inst Forestry, Siberian Div, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Menyailo, O.V.; Krasnoshchekov, Y.N.

    Potential denitrification activity and mineralization rate of organic compounds in northern taiga soils of the Yenisei region
[Text] / O. V. Menyailo, Y. N. Krasnoshchekov // Eurasian Soil Sci. - 2001. - Vol. 34, Is. 4. - P416-423. - Cited References: 19 . - 8. - ISSN 1064-2293
РУБ Soil Science

Аннотация: The dependence of carbon mineralization and denitrification on soil chemical properties was studied in order to determine the spatial variability of these processes. Multiple regression models that describe 57% of the variation in denitrification and 97% of the variation in the organic carbon mineralization were developed. It was found that the simulation of potential denitrification activity is a more difficult problem than the simulation of C mineralization. Application of the orthogonal regression method proved that the fluxes of CO2 and N2O depend on the content of exchangeable cations in the soil (12-17% of the variability); the effect of soil acidity and the organic matter content is shown to be more significant (74-75% of the variability).

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Держатели документа:
Russian Acad Sci, Sukachev Inst Forestry, Siberian Div, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Menyailo, O.V.; Krasnoshchekov, Y.N.

    Effect of Siberian tree species on N2O production and consumption
[Text] / O. V. Menyailo // Biol. Bull. - 2006. - Vol. 33, Is. 5. - P492-497, DOI 10.1134/S1062359006050116. - Cited References: 18 . - 6. - ISSN 1062-3590
РУБ Biology

Аннотация: The effect of six Siberian tree species on two stages of denitrification-N2O production and consumption-was studied. Broadleaf species (aspen and birch) proved to have lower rates of N2O consumption compared to coniferous species. The factors influencing production and consumption of N2O were also evaluated. The replacement of coniferous forests with broadleaf trees will double the N2O/N-2 ratio in the denitrification end-products. Doubled N2O emission from Siberian forest soils to the atmosphere can be expected due to changes in tree species composition of forest ecosystems even without considering changes in water and temperature regimes in soil.

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

Доп.точки доступа:
Menyailo, O.V.

    The effect of Siberian tree species on the mineralization rate of soil organic matter
[Text] / O. V. Menyailo // Eurasian Soil Sci. - 2009. - Vol. 42, Is. 10. - P1156-1162, DOI 10.1134/S106422930910010X. - Cited References: 23. - This work was supported in part by the Marie Curie Action-International Incoming Fellowships (EU 7th Framework Program) and the Alexander von Humboldt Foundation (A. von Humboldt Stiftung, Germany). . - 7. - ISSN 1064-2293
РУБ Soil Science

Аннотация: The mineralization of organic matter in the soils under the six main Siberian forest-forming species was studied. The nitrogen mineralization and nitrification were the most affected by the different tree species. The rate of the CO(2) formation was similar in the soils under the different tree species. The factors affecting the variation of the data characterizing the microbiological processes were revealed. The nitrogen mineralization and nitrification correlated with the contents of the soil carbon, nitrogen, and NH (4) (+) and the soil acidity, while the carbon mineralization correlated only with the NH (4) (+) concentration and the C/N ratio.

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

Доп.точки доступа:
Menyailo, O.V.; Marie Curie Action-International Incoming Fellowships; Alexander von Humboldt Foundation

    Tree species effects on potential production and consumption of carbon dioxide, methane, and nitrous oxide: The Siberian afforestation experiment
[Text] / O. V. Menyailo, B. A. Hungate ; ed.: D Binkley, Binkley, // NATO Sci. Series IV Earth Environ. Sciences : SPRINGER, 2005. - Vol. 55: NATO Advanced Research Workshop on Trees and Soil Interactions, Implications to Global Climate Change (AUG, 2004, Krasnoyarsk, RUSSIA). - P293-305. - Cited References: 23 . - 13. - ISBN 1568-1238. - ISBN 1-4020-3445-8
РУБ Forestry + Geosciences, Multidisciplinary + Soil Science

Аннотация: Changes in tree species composition could affect how forests produce and consume greenhouse gases, because the soil microorganisms that carry out these biogeochemical transformations are often sensitive to plant characteristics. We examined the effects of thirty years of stand development under six tree species in Siberian forests (Scots pine, spruce, arolla pine, larch, aspen and birch) on potential rates Of Soil CO2 production, N2O reduction and N2O production during denitrification, and CH4 oxidation. Because many of these activities relate to soil N turnover, we also measured net nitrification and N mineralization. Overall, the effects of tree species were more pronounced on N2O and CH4 fluxes than on CO2 production. Tree species altered substrate-induced respiration (SIR) and basal respiration, but the differences were not as large as those observed for N transformations. Tree species caused similar effects on denitrification potential, net N mineralization, and net nitrification, but effects on N2O reduction were idiosyncratic, resulting in a decoupling of N2O production and reduction. CH4 oxidation was affected by tree species, but these effects depended on soil moisture: increasing soil moisture enhanced CH4 oxidation under some tree species but decreased it under others. If global warming causes deciduous species to replace coniferous species, our results suggest that Siberian forests would support soil microbial communities with enhanced potential to consume CH4 but also to produce more N2O. Future predictions of CH4 uptake and N2O efflux in boreal and temperate forests need to consider changes in tree species composition together with changes in soil moisture regimes.

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Держатели документа:
SB RAS, Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Menyailo, O.V.; Hungate, B.A.; Binkley, D \ed.\; Binkley, \ed.\

    Soil microbial activities in tree-based cropping systems and natural forests of the Central Amazon, Brazil
[Text] / O. V. Menyailo [et al.] // Biol. Fertil. Soils. - 2003. - Vol. 38, Is. 1. - P1-9, DOI 10.1007/s00374-003-0631-4. - Cited References: 23 . - 9. - ISSN 0178-2762
РУБ Soil Science

Аннотация: Little information is available about the factors controlling soil C and N transformations in natural tropical forests and tree-based cropping systems. The aim of this work was to study the effects of single trees on soil microbiological activities from plantations of timber and non-timber species as well as species of primary and secondary forests in the Central Amazon. Soil samples were taken in the primary forest under Oenocarpus bacaba and Eschweilera spp., in secondary regrowth with Vismia spp., under two non-timber tree species (Bixa orellana L. and Theobroma grandiflorum Willd.), and two species planted for wood production (Carapa guianensis Aubl. and Ceiba pentandra). In these soils, net N mineralization, net nitrification, denitrification potential, basal and substrate-induced respiration rates were studied under standardized soil moisture and temperature conditions. Individual tree species more strongly affected N transformations, particularly net nitrification, than C respiration. Our results suggest that soil C respiration can be affected by tree species if inorganic N becomes a limiting factor. We found a strong correlation among almost all microbiological processes suggesting close inter-relationship between C and N transformations in the studied soils. Correlation analysis between soil chemical properties and microbiological activities suggest that such strong inter-relationships are likely due to competition between the denitrifying and C-mineralizing communities for NO3-, which might be an important N source for the microbial population in the studied soils.

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Держатели документа:
Russian Acad Sci, Inst Forest, Siberain Branch, Krasnoyarsk 660036, Russia
Univ Bayreuth, Inst Soil Sci & Soil Geog, D-95447 Bayreuth, Germany
EMBRAPA, BR-69011970 Manaus, Amazonas, Brazil

Доп.точки доступа:
Menyailo, O.V.; Lehmann, J...; Cravo, M.D.; Zech, W...

    The effect of single tree species on soil microbial activities related to C and N cycling in the Siberian artificial afforestation experiment - Tree species and soil microbial activities
[Text] / O. V. Menyailo, B. A. Hungate, W. . Zech // Plant Soil. - 2002. - Vol. 242, Is. 2. - P183-196, DOI 10.1023/A:1016245619357. - Cited References: 29 . - 14. - ISSN 0032-079X
РУБ Agronomy + Plant Sciences + Soil Science

Аннотация: The effects of grassland conversion to forest vegetation and of individual tree species on microbial activity in Siberia are largely unstudied. Here, we examined the effects of the six most commonly dominant tree species in Siberian forests (Scots pine, spruce, Arolla pine, larch, aspen and birch) on soil C and N mineralization, N2O-reduction and N2O production during denitrification 30 years after planting. We also documented the effect of grassland conversion to different tree species on microbial activities at different soil depths and their relationships to soil chemical properties. The effects of tree species and grassland conversion were more pronounced on N than on C transformations. Tree species and grassland conversion did significantly alter substrate-induced respiration (SIR) and basal respiration, but the differences were not as large as those observed for N transformations. Variances in SIR and basal respiration within species were markedly lower than those in N transformations. Net N mineralization, net nitrification, and denitrification potential were highest under Arolla pine and larch, intermediate under deciduous aspen and birch, and lowest beneath spruce and Scots pine. Tree species caused similar effects on denitrification potential, net N mineralization, and net nitrification, but effects on N2O reduction rate were idiosyncratic, indicating a decoupling of N2O production and reduction. We predict that deciduous species should produce more N2O in the field than conifers, and that Siberian forests will produce more N2O if global climate change alters tree species composition. Basal respiration and SIR showed inverse responses to tree species: when basal respiration increased in response to a given tree species, SIR declined. SIR may have been controlled by NH4+ availability and related therefore to N mineralization, which was negatively affected by grassland conversion. Basal respiration appeared to be less limited by NH4+ and controlled mostly by readily available organic C (DOC), which was higher in concentration under forests than in grassland and therefore basal respiration was higher in forested soils. We conclude that in the Siberian artificial afforestation experiment, soil C mineralization was not limited by N.

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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...

    Denitrification and C, N mineralization as function of temperature and moisture potential in organic and mineral horizons of an acid spruce forest soil
[Text] / O. V. Menyailo, B. . Huwe // J. Plant Nutr. Soil Sci. - 1999. - Vol. 162, Is. 5. - P527-531, DOI 10.1002/(SICI)1522-2624(199910)162:5527::AID-JPLN5273.3.CO;2-R. - Cited References: 14 . - 5. - ISSN 1436-8730
РУБ Agronomy + Plant Sciences + Soil Science
Рубрики:
NITROGEN DEPOSITION
   NITRIFICATION

   EMISSION

Кл.слова (ненормированные):
denitrification -- forest soils -- N-immobilization -- net N-mineralization -- temperature -- water potential

Аннотация: The influence of temperature (T) and water potential (psi) on the denitrification potential, C and N mineralization and nitrification were studied in organic and mineral horizons of an acid spruce forest soil. The amount of N2O emitted from organic soil was 10 times larger than from the mineral one. The maximum of N2O emission was in both soils at the highest water potential 0 MPa and at 20 degrees C. CO2 production in the organic soil was 2 times higher than in mineral soil. Net ammonification in organic soil was negative for most of the T-psi variations, while in mineral soil it was positive. Net nitrification in organic soil was negative only at the maximum water potential and temperature (0 MPa, 28 degrees C). The highest rate was between 0 and -0.3 MPa and between 20 and 28 degrees C. In mineral soil NO3- accumulated at all T-psi variations with a maximum at 20 degrees C and -0.3 MPa. We concluded that in organic soil the immobilization of NH4+ is the dominant process in the N-cycling. Nevertheless, decreasing of total N mineralized at 0 MPa and 20-28 degrees C can be explained by denitrification.

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Держатели документа:
Univ Bayreuth, Dept Soil Phys, D-95440 Bayreuth, Germany
RAS, SB, Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Menyailo, O.V.; Huwe, B...

    Activity of denitrification and dynamics of N2O release in soils under six tree species and grassland in central Siberia
[Text] / O. V. Menyailo, B. . Huwe // J. Plant Nutr. Soil Sci.-Z. Pflanzenernahr. Bodenkd. - 1999. - Vol. 162, Is. 5. - P533-538, DOI 10.1002/(SICI)1522-2624(199910)162:5533::AID-JPLN5333.3.CO;2-2. - Cited References: 17 . - 6. - ISSN 1436-8730
РУБ Agronomy + Plant Sciences + Soil Science
Рубрики:
NITROUS-OXIDE
   PASTURE SOIL

   NITRATE

Кл.слова (ненормированные):
denitrification -- forest soils -- grassland -- N2O production -- N2O consumption -- N2O reductase

Аннотация: To clarify the influence of tree species on N2O emissions, soil chemical properties, initial concentrations of denitrifying enzymes and dynamics of N2O emissions were studied in the laboratory under standardized conditions in soil samples from artificially afforested spots with spruce, birch, pine, aspen, larch, cedar and under grass as control. 26 years of tree development caused changes not only in soil chemistry but also in persistence and dynamics of denitrifying enzymes. Total amount of N2O release correlated more with the initial status of N2O-reductase than with N2O-producing enzymes. C:N ratio was the main chemical factor explaining variation of N2O emission between species. At equal level of atmospheric N-deposition, N2O release will increase in the order: grassland < larch < pine < spruce < cedar < aspen < birch. These data may be useful to predict N2O losses from forest ecosystems in Siberia with different dominant tree species.

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Держатели документа:
RAS, SB, Inst Forest, Krasnoyarsk 660036, Russia
Univ Bayreuth, Dept Soil Phys, D-95440 Bayreuth, Germany

Доп.точки доступа:
Menyailo, O.V.; Huwe, B...

    Stable isotope discrimination during soil denitrification: Production and consumption of nitrous oxide
[Text] / O. V. Menyailo, B. A. Hungate // Glob. Biogeochem. Cycle. - 2006. - Vol. 20, Is. 3. - Ст. GB3025, DOI 10.1029/2005GB002527. - Cited References: 47 . - 10. - ISSN 0886-6236
РУБ Environmental Sciences + Geosciences, Multidisciplinary + Meteorology & Atmospheric Sciences

Аннотация: Measuring the stable isotope composition of nitrous oxide ( N(2)O) evolved from soil could improve our understanding of the relative contributions of the main microbial processes ( nitrification and denitrification) responsible for N(2)O formation in soil. However, interpretation of the isotopic data in N(2)O is complicated by the lack of knowledge of fractionation parameters by different microbial processes responsible for N(2)O production and consumption. Here we report isotopic enrichment for both nitrogen and oxygen isotopes in two stages of denitrification, N(2)O production and N(2)O reduction. We found that during both N(2)O production and reduction, enrichments were higher for oxygen than nitrogen. For both elements, enrichments were larger for N(2)O production stage than for N(2)O reduction. During gross N(2)O production, the ratio of delta(18)O- to-delta(15)N differed between soils, ranging from 1.6 to 2.7. By contrast, during N(2)O reduction, we observed a constant ratio of delta(18)O- to-delta(15)N with a value near 2.5. If general, this ratio could be used to estimate the proportion of N(2)O being reduced in the soil before escaping into the atmosphere. Because N(2)O- reductase enriches N(2)O in both isotopes, the global reduction of N(2)O consumption by soil may contribute to the globally observed isotopic depletion of atmospheric N(2)O.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Forest, Krasnoyarsk 660036, Russia
No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA
No Arizona Univ, Merriam Powell Ctr Environm Res, Flagstaff, AZ 86011 USA

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

    Tree species and moisture effects on soil sources of N2O: Quantifying contributions from nitrification and denitrification with O-18 isotopes
[Text] / O. V. Menyailo, B. A. Hungate // J. Geophys. Res.-Biogeosci. - 2006. - Vol. 111, Is. G2. - Ст. G02022, DOI 10.1029/2005JG000058. - Cited References: 36 . - 8. - ISSN 0148-0227
РУБ Environmental Sciences + Geosciences, Multidisciplinary

Аннотация: Nitrous oxide (N2O) is an important greenhouse gas and participates in the destruction of stratospheric ozone. Soil bacteria produce N2O through denitrification and nitrification, but these processes differ radically in substrate requirements and responses to the environment. Understanding the controls over N2O efflux from soils, and how N2O emissions may change with climate warming and altered precipitation, require quantifying the relative contributions from these groups of soil bacteria to the total N2O flux. Here we used ammonium nitrate (NH4NO3, including substrates for both processes) in which the nitrate has been enriched in the stable isotope of oxygen, O-18, to partition microbial sources of N2O, arguing that a molecule of N2O carrying the O-18 labeled will have been produced by denitrification. We compared the influences of six common tree species on the relative contributions of nitrification and denitrification to N2O flux from soils, using soils from the Siberian afforestation experiment. We also altered soil water content, to test whether denitrification becomes a dominant source of N2O when soil water content increases. Tree species altered the proportion of nitrifier and denitrifier-derived N2O. Wetter soils produced more N2O from denitrification, though the magnitude of this effect varied among tree species. This indicates that the roles of denitrification and nitrification vary with tree species, and, that tree species influence soil responses to increased water content.

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Держатели документа:
Russian Acad Sci, SB RAS, Inst Forest, Krasnoyarsk, Russia
No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA
No Arizona Univ, Merriam Powell Ctr Environm Res, Flagstaff, AZ 86011 USA

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

    Tree species of the Central Amazon and soil moisture alter stable isotope composition of nitrogen and oxygen in nitrous oxide evolved from soil
/ O. V. Menyailo [et al.] // Isotopes in Environmental and Health Studies. - 2003. - Vol. 39, Is. 1. - P41-52, DOI 10.1080/1025601031000096745 . - ISSN 1025-6016
Аннотация: The use of stable isotopes of N and O in N2O has been proposed as a way to better constrain the global budget of atmospheric N2O and to better understand the relative contributions of the main microbial processes (nitrification and denitrification) responsible for N2O formation in soil. This study compared the isotopic composition of N2O emitted from soils under different tree species in the Brazilian Amazon. We also compared the effect of tree species with that of soil moisture, as we expected the latter to be the main factor regulating the proportion of nitrifier- and denitrifier, derived N2O and, consequently, isotopic signatures of N2O. Tree species significantly affected ?15N in nitrous oxide. However, there was no evidence that the observed variation in ?15N in N2O was determined by varying proportions of nitrifier- vs. denitrifier-derived N2O. We submit that the large variation in ?15N-N2O is the result of competition between denitrifying and immobilizing microorganisms for NO-3. In addition to altering ?15N-N2O, tree species affected net rates of N2O emission from soil in laboratory incubations. These results suggest that tree species contribute to the large isotopic variation in N2O observed in a range tropical forest soils. We found that soil water affects both 15N and 18O in N2O, with wetter soils leading to more depleted N2O in both 15N and 18O. This is likely caused by a shift in biological processes for 15N and possible direct exchange of 18O between H2O and N2O.

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Держатели документа:
Institute of Forest SB RAS, Krasnoyarsk, Russian Federation
Department of Biological Sciences, Merriam-Powell Ctr. for Environ.Res., Northern Arizona University, Flagstaff, United States
Department of Soil Sci./Soil Geogr., University of Bayreuth, Bayreuth, Germany
Department of Plant Ecology, University of Bayreuth, Bayreuth, Germany

Доп.точки доступа:
Menyailo, O.V.; Hungate, B.A.; Lehmann, J.; Gebauer, G.; Zech, W.

    CH4 and N2O dynamics of a Larix gmelinii forest in a continuous permafrost region of central Siberia during the growing season
/ T. Morishita [et al.] // Polar Sci. - 2014, DOI 10.1016/j.polar.2014.01.004 . - ISSN 1873-9652

Кл.слова (ненормированные):
Boreal forest -- Lichen -- Methane -- Moss -- Nitrous oxide

Аннотация: Forest soils are generally sinks of CH4 and sources of N2O. To characterize the dynamics of these major greenhouse gases in central Siberia during the growing season, we measured fluxes from forest soil and assessed the relationships between CH4 and N2O fluxes and forest floor vegetation types, soil temperature, and moisture conditions. At the soil surface, both CH4 uptake and emission (-6.6 to 3.1В ?g CH4-CВ m-2В h-1) were observed, and CH4 fluxes did not differ among vegetation types. CH4 flux was positively correlated with soil moisture, but not with soil temperature. The small CH4 uptake compared with previous reports was due to CH4 production in response to high precipitation. N2O was also emitted and taken up by soil (-0.2 to 0.4В ?gВ N2O-NВ m-2В h-1), and N2O fluxes did not differ among vegetation types. N2O flux was negatively correlated with soil moisture and not correlated with soil temperature. Our findings suggest that high soil moisture and low availability of mineral nitrogen resulted in N2O uptake due to denitrification. Furthermore, both CH4 and N2O were emitted from a river at the site; these were produced in the basin of the riverbank rather than deep in the soil. В© 2014 Elsevier B.V. and NIPR.

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Держатели документа:
Shikoku Research Center, Forestry and Forest Products Research Institute, 2-915, Asakura Nishimachi, Kochi 780-8077, Japan
Forestry and Forest Products Research Institute, Tsukuba 305-8687, Japan
Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
V.N. Sukachev Institute of Forest, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Morishita, T.; Matsuura, Y.; Kajimoto, T.; Osawa, A.; Zyryanova, O.A.; Prokushkin, A.S.