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1.


   
    Experimental modeling of the influence of the rise in average summer temperatures on carbon circulation in tundra ecosystems / Y. V. Barkhatov [et al.] // Dokl. Earth Sci. - 2016. - Vol. 471, Is. 1. - P1168-1170, DOI 10.1134/S1028334X16110106 . - ISSN 1028-334X
Кл.слова (ненормированные):
Carbon dioxide -- Ecology -- Landforms -- Carbon fluxes -- Climate condition -- Comparative evaluations -- Experimental modeling -- Physical simulation -- Soil respiration -- Summer temperature -- Temperature rise -- Ecosystems
Аннотация: A sealed vegetation chamber was designed and constructed for physical simulation of climate conditions in the Subarctic zone during the spring–summer time. The small laboratory tundra-simulating ecosystem (TSE) was created for comparative evaluation of the rates of soil respiration and of the total balance of carbon fluxes in tundra ecosystems. The test experiment was performed to study the TSE response to a temperature rise in air and soil by 2°C in terms of the intensity of the СО2 flux. It was shown that this increase in temperature would cause a pronounced shift in the balance of СО2 production and utilization in the ecosystem from near-zero values to a stable generation of 24 ?mol/h of CO2 per 1 kg of dry biomass. © 2016, Pleiades Publishing, Ltd.

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Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Barkhatov, Y. V.; Tikhomirov, A. A.; Ushakova, S. A.; Shikhov, V. N.; Bartsev, S. I.; Degermendzhi, A. G.

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2.


   
    Modeling the boundaries of plant ecotones of mountain ecosystems / Y. Ivanova, V. Soukhovolsky // Forests. - 2016. - Vol. 7, Is. 11, DOI 10.3390/f7110271 . - ISSN 1999-4907
Кл.слова (ненормированные):
Biodiversity -- Boundaries of ecotones -- Ecotone -- Mountain forest ecosystems -- Biodiversity -- Climate change -- Climate models -- Ecology -- Forestry -- Landforms -- Vegetation -- Boundary shifts -- Ecotone -- Forest inventory data -- Mountain ecosystems -- Mountain forests -- Second-order phase transition -- Species composition -- Vegetation belt -- Ecosystems
Аннотация: The ecological second-order phase transition model has been used to describe height-dependent changes in the species composition of mountain forest ecosystems. Forest inventory data on the distribution of various tree species in the Sayan Mountains (south Middle Siberia) are in good agreement with the model proposed in this study. The model was used to estimate critical heights for different altitudinal belts of vegetation, determine the boundaries and extents of ecotones between different vegetation belts, and reveal differences in the ecotone boundaries between the north- and south-facing transects. An additional model is proposed to describe ecotone boundary shifts caused by climate change. © 2016 by the authors.

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Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Federal Research Center 'Krasnoyarsk Science Center SB RAS', Academgorodok 50-50, Krasnoyarsk, Russian Federation
V.N. Sukachev Institute of Forest, Siberian Branch, Russian Academy of Sciences, Federal Research Center 'Krasnoyarsk Science Center SB RAS', Academgorodok 50-28, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Ivanova, Y.; Soukhovolsky, V.

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