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

[Text] / T. . Kajimoto [et al.] // For. Ecol. Manage. - 2006. - Vol. 222, Is. 01.03.2013. - P314-325, DOI 10.1016/j.foreco.2005.10.031. - Cited References: 62 . - 12. - ISSN 0378-1127РУБ Forestry

Аннотация: We examined size-mass allometry and biomass allocation of two larch species (Larix gmelinii (Rupr.) Rupr. and Larix cajanderi Mayer) that grow on the continuous permafrost regions in Siberia. Sample tree data (total n = 27) gathered from four mature stands (> 100 years old) were employed for analysis. First, to determine good size predictor of biomass, site-specific allometric relationships (log-linear equation form) were derived between dry mass of four components (stem, branch, needle and coarse root; >= 5 mm in diameter) and seven size variables; stem diameters (breast height, 30 cm height and crown base), sapwood areas (breast height and 30 cm height), and two combined-variables (tree height x dia-diameter). For all components, site-specific allometric equations based on breast-height diameter (D) always gave high correlations as those using other size variables. However, between-stand comparisons of the D-base site-specific allometry indicated that size dependency (i.e., regression slope) differed for stem mass. Besides, needle and coarse root mass for a given size (i.e., regression intercept) differed significantly among the four stands. These facts implied that D-base regression model was reliable for biomass estimation by site-specific allometry, but was not suitable for developing general (i.e., site-common) allometry. Second, to examine carbon allocation pattern, we estimated each stand biomass by applying corresponding site-specific D-base allometry. Stand total biomass ranged from 8.6 to 33.1 Mg ha(-1), and aboveground-total/coarse root biomass ratio (i.e., T/R) ranged from 1.5 to 2.6. The variation was mainly due to trade-offs between stem and root biomass. Average T/R was about 2.3 that was calculated for some reported L. gmelinii and L. cajanderi stands (n = 16), including our four stands. This average T/R was extremely small in comparison to that (5.1) of Scots pine (Pinus sylvestris L.) stands on the non- or discontinuous permafrost regions in Siberia. This finding strongly suggested that the two Larix species invested annual carbon gains largely into root growth. We discussed its ecological implications in relation to stand structure and permafrost soil-N conditions in the larch taiga ecosystem. (c) 2005 Elsevier B.V. All rights reserved.

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Kyushu Res Ctr, Forestry & Forest Prod Res Inst, Kumamoto 8600862, Japan
Forestry & Forest Prod Res Inst, Tsukuba, Ibaraki 3058687, Japan
Ryukoku Univ, Fac Intercultural Commun, Otsu, Shiga 5202194, Japan
Russian Acad Sci, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Russian Acad Sci, Inst Biol Problems Cryolithozone, Yakutsk 677891, Russia
Sakha Minist Nat Protect, Yakutsk 67000, Russia
Tohoku Res Ctr, Forestry & Forest Prod Res Inst, Morioka, Iwate 0200122, Japan
Hokkaido Univ, Boreal Forest Conservat Studies, Sapporo, Hokkaido 0600809, Japan

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Kajimoto, T...; Matsuura, Y...; Osawa, A...; Abaimov, A.P.; Zyryanova, O.A.; Isaev, A.P.; Yefremov, D.P.; Mori, S...; Koike, T...

/ V. I. Kharuk [et al.] // Contemp. Probl. Ecol. - 2019. - Vol. 12, Is. 4. - P299-309, DOI 10.1134/S199542551904005X. - Cited References:38. - This work was supported by the Russian Foundation for Basic Research, project nos. 18-45-240003 and 18-05-00432. Dendrochronological and dendroclimatic analysis was performed with support from the Russian Science Foundation, project no. 17-74-10113. . - ISSN 1995-4255. - ISSN 1995-4263РУБ Ecology

Аннотация: The radial increment of Abies sibirica Ledeb. and mortality dynamics of fir stands in the mountain forests of the Eastern Sayan (Stolby State Nature Reserve) have been analyzed. The unprecedented decline in fir stands is caused by water stress due to an increase in air temperature and synergy with the impact of the Polygraphus proximus Blandford. This xylophage was not previously observed in the Abies sibirica range. In the initial phase of climate warming, an increase in radial increment was observed, which was replaced by a depression in 1985-2017. The declining of fir trees was preceded by an increase in the relationship between growth index and SPEI, as well as between the growth index and root-zone moisture content. At the same time, the growth index of the declining cohort was more closely associated with the root zone moisture content (r(2) = 0.56) and SPEI (r(2) = 0.74) than the growth index of the surviving cohort (r(2) = 0.15 and r(2) = 0.39, respectively). The decline in fir began in the 2000s, when Polygraphus proximus Blandford attacked trees Abies sibirica. During this period, dead stands were localized mainly on the relief elements with the highest probability of water stress (steep slopes located in a "rain shadow"). By 2017, the decline spread throughout the entire territory of fir stands, which led to the mortality of similar to 75% of fir stands. During the period of tree decline, a close relationship was observed between growth index and fir mortality (r = -0.79). The surviving trees grew under conditions of a higher root-zone humidity (compared to declining trees). The proximity of growth-index trajectories of cohorts of declining and surviving trees, which indicates the probability of mortality of surviving trees in the context of a predicted climate aridity increase, is noteworthy.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.
Stolby State Nat Reserve, Krasnoyarsk 660006, Russia.

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Kharuk, V. I.; Shushpanov, A. S.; Petrov, I. A.; Demidko, D. A.; Im, S. T.; Knorre, A. A.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-45-240003, 18-05-00432]; Russian Science FoundationRussian Science Foundation (RSF) [17-74-10113]

/ V. I. Kharuk, S. T. Im, I. A. Petrov [et al.] // Glob. Ecol. Biogeogr. - 2020, DOI 10.1111/geb.13243. - Cited References:56. - RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, Grant/Award Number: 18-05-00432 and 18-45-240003 . - Article in press. - ISSN 1466-822X. - ISSN 1466-8238РУБ Ecology + Geography, Physical

Аннотация: Aim An increase in conifer mortality has been observed widely across the boreal forest biome. We investigate the causes of this mortality, in addition to the geospatial and temporal dynamics of mortality, in Siberian pine and fir stands. Location Central Siberia. Time period 1950-2018. Major taxa studied Pinus sibirica Du Tour and Abies sibirica Ledeb. Methods We used geospatial analysis of satellite-derived (MODIS, Landsat) data, topography (elevation, slope steepness and exposure) and climatic variables [precipitation, thermal degree days (TDD = n-ary sumation (t > 0 degrees C), standardized precipitation evapotranspiration index (SPEI) and root zone moisture content (RZM)], together with in situ data. Dendrochronology was applied for analysis of the radial growth increment (GI). Results Siberian pine and fir mortality has increased greatly in recent decades. The mortality of forest stands and trees was dependent on the TDD, RZM and SPEI. Mortality occurred mainly within the southern part of the species ranges and decreased northward, correlated with latitudinal gradients of TDD and SPEI. Mortality was observed mostly at elevations < 1,000 m and decreased with increasing elevation, whereas the area of forests and GI of trees increased with elevation. Forest mortality was preceded by the changes in tree GI. Since the onset of climate warming, GI increased until a breakpoint in the mid-1980s. Further temperature increase caused a reduction in GI owing to moisture stress and division of the tree population into "decliners" and "survivors". Mortality was caused by the combined impact of moisture stress and bark beetle attacks. Main conclusion Siberian pine and fir mortality was preceded by a reduction in the GI of trees caused by elevated air temperatures, acute droughts and subsequent insect attacks. Forest mortality was observed mostly at low elevations, whereas within the areas with sufficient moisture availability (at elevations c. < 1,000 m) the tree GI and forest area increased. With the projected increase in drought, Siberian pine and fir trees are predicted to retreat from their southern low-elevation ranges.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Sukachev Inst Forest,Subdiv Fed Res Ctr, Academgorodok 50-28, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, GIS Chair, Krasnoyarsk, Russia.
Reshetnev Siberian State Univ Sci & Technol, Space Instruments & Technol Chair, Krasnoyarsk, Russia.

Доп.точки доступа:
Kharuk, Viacheslav, I; Im, Sergei T.; Petrov, Il'ya A.; Dvinskaya, Maria L.; Shushpanov, Alexandr S.; Golyukov, Alexei S.; RFBRRussian Foundation for Basic Research (RFBR); Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science [18-05-00432, 18-45-240003]