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

/ A. V. Kirdyanov [et al.] // WATER RESOURCES, FOREST, MARINE AND OCEAN ECOSYSTEMS CONFERENCE : STEF92 TECHNOLOGY LTD, 2016. - 16th International Multidisciplinary Scientific Geoconference (SGEM (JUN 30-JUL 06, 2016, Albena, BULGARIA). - P517-524. - (International Multidisciplinary Scientific GeoConference-SGEM). - Cited References:14 . - РУБ Ecology + Oceanography + Soil Science + Water Resources

Аннотация: The boreal forest accounts for approximately 22% of the Northern Hemisphere landmass with nearly 40% of this huge biome growing on continuously frozen soils. Projected climate change leading to degradation of permafrost and increasing drought situation at high latitudes in Eurasia will seriously affect productivity of forests on permafrost. Here we present the results of an on-going research of tree radial growth in the midst of the permafrost zone in Siberia, Russia (Tura region, 64 degrees N, 100 degrees E, 140-610 m a.s.1.). Tree-ring width and density chronologies of Gmelin larch and Siberian spruce from a great variety of sites characterized by different thermo-hydrological regime of soils are analyzed. The obtained results reveal that current tree radial growth and tree-ring structure in permafrost region in Siberia are largely dependent on local site conditions and may be constrained by low air and soil temperatures as well as soil water availability. Varying climatic responses and seasonal radial growth of trees at different habitats indicate a range of possible scenarios of further development of northern larch stands. Forest fire is another important factor strongly affecting tree stand dynamics and forest ecosystem functioning in the continuous permafrost zone. Analysis of tree-ring parameters indicate that post-fire dynamics of tree-ring structure is in accordance with the changes in habitat conditions caused by removal by fire and then gradual recovery of ground vegetation resulting in an alteration in soil active layer depth. In general, the results of this multi-proxy analysis for trees growing under various conditions in the continuous permafrost zone in Siberia allow assumptions about changes in tree productivity, stand dynamics and therefore carbon uptake under projected climate change and permafrost degradation.

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Держатели документа:
RAS, VN Sukachev Inst Forest, SB, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Natl Nat Reserve Stolby, Krasnoyarsk, Russia.

Доп.точки доступа:
Kirdyanov, Alexander V.; Bryukhanova, Marina V.; Knorre, Anastasia A.; Tabakova, Maria A.; Prokushkin, Anatoly S.

/ V. I. Kharuk, S. T. Im, I. A. Petrov // J Mt. Sci. - 2018. - Vol. 15, Is. 12. - P2579-2589, DOI 10.1007/s11629-018-5071-6. - Cited References:44. - This research was supported by the Russian Foundation for Basic Research (grants #18-05- 00432). Dendrochronological analysis was supported by the Russian Science Foundation (17-74-10113). . - ISSN 1672-6316. - ISSN 1993-0321РУБ Environmental Sciences

Аннотация: Warming hiatus occurred in the Altay-Sayan Mountain Region, Siberia in c. 1997-2014. We analyzed evergreen conifer (EGC) stands area (satellite data) and trees (Siberian pine, Pinus sibirica Du Tour, Siberian fir, Abies sibirica Ledeb.) growth increment (dendrochronology data) response to climate variables before and during the hiatus. During the hiatus, EGC area increased in the highlands (>1000 m) (+30%), whereas at low and middle elevations (<1000 m. a.s.l.) the EGC area decreased (-7%). The EGC area increase was observed on the rain-ward northwest slopes mainly. In highlands, EGC area increase mainly correlated with summer air temperature, whereas at low and middle elevations EGC area decrease correlated with drought index SPEI and vapor pressure deficit (VPD). EGC mortality (fir and Siberian pine) in lowland was caused by the synergy of water stress (inciting factor) and barkbeetle attacks (contributing factor). Tree growth increment (GI) dynamics differs with respect to elevation. At high elevation (1700 m) GI permanently increased since warming onset, whereas at the middle (900 m) and low elevations (450 m) GI increased until c. 1983 yr. with followed depression. That GI breakpoint occurred about a decade before hiatus onset. In spite of growth depression, during hiatus GI was higher than that in pre-warming period. At high elevation, GI positively responded to elevated June temperatures and negatively to moisture increase (precipitation, root zone moisture content, VPD, and SPEI). At low elevation GI negatively responded to June temperatures and positively to moisture increase. For both, low and high elevation, these patterns persisted throughout the study period (1967-2014). On the contrary, at middle elevations GI dependence on climate variables switch after breakpoint year (1983). Before breakpoint, June air temperature (positive correlation) and moisture (negative correlations) controlled GI. Further temperature increase leads GI depression and switched correlation signs to opposite (from positive to negative with temperature, and from negative to positive with moisture variables).

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Держатели документа:
Russian Acad Sci, Siberian Branch, Fed Sci Ctr, Sukachev Inst Forest, Academgorodok 50-28, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Svobodny Str 79, Krasnoyarsk 660041, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsky Rabochy Str 31, Krasnoyarsk 660014, Russia.

Доп.точки доступа:
Kharuk, Viacheslav I.; Im, Sergei T.; Petrov, Il'ya A.; Russian Foundation for Basic Research [18-05- 00432]; Russian Science Foundation [17-74-10113]

/ I. A. Petrov, A. S. Shushpanov, A. S. Golyukov [et al.] // Russ. J. Ecol. - 2021. - Vol. 52, Is. 5. - P399-405, DOI 10.1134/S1067413621050118. - Cited References:29. - This study was supported by the Russian Foundation for Basic Research (project no. 18-05-00432) and grants from the Government of Krasnoyarsk Krai and Krasnoyarsk Regional Science Foundation (project nos. 18-45-240003 and 20-44-240007). . - ISSN 1067-4136. - ISSN 1608-3334РУБ Ecology

Аннотация: Climate change entails shifts in the ranges of woody plants along both latitudinal and altitudinal gradients in the boreal forest biome. In this study, dendrochronological and GIS technologies have been used to evaluate shifts in the upper distribution limits of trees and shrubs in the Eastern Sayan Mountains. The results show that upward expansion along the altitudinal gradient and increase in projective cover against the background of climate warming reach a maximum in shrubs (Betula spp., Salix spp.); then follow Siberian larch (Larix sibirica Ledeb.), Siberian stone pine (Pinus sibirica Du Tour), and Siberian fir (Abies sibirica Ledeb). The abundance of P. sibirica undergrowth in the mountain forest-tundra ecotone has increased, which is due to a rise in May-August air temperatures (r = 0.97). In zones with sufficient moisture supply (high mountains), warming stimulates radial growth of trees and shrubs and promotes their expansion to the mountain forest-tundra.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 60041, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Petrov, I. A.; Shushpanov, A. S.; Golyukov, A. S.; Dvinskaya, M. L.; Kharuk, V. I.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-05-00432]; Government of Krasnoyarsk Krai; Krasnoyarsk Regional Science Foundation [18-45-240003, 20-44-240007]