Specific features of the growth of Siberian spruce (Picea obovata Ledeb.) at early stages of ontogeny in broadleaf-conifer forests of the Ufa plateau

Kulagin, A. Yu.; Давыдычев, А. Н.; Зайцев, Г. А.

doi:10.1134/s1067413606010115

Cited by 7 publications

(5 citation statements)

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“…Low inter-serial correlation coefficients indicate that, apart from the general climatic influence, there are other factors within the site which make a significant contribution to the variability of growth on the scale of individual trees. Other observation of individual-scale factors" input in spruce growth patterns was made in Canada (Montoro Girona et al2016Girona et al , 2017 It is logical to assume that at the study area this role is played by micro-conditions (Barber et al 2000;Kulagin et al 2006;Monnier et al 2012;Lange et al 2016), which are characterized by high diversity and mosaic structure in mountain ecosystems due to high terrain heterogeneity. This is confirmed by analysis of local sub-sets based on inter-serial correlation coefficients.…”

Section: Growth Patterns Of Sprucementioning

confidence: 90%

Divergent growth trends and climatic response of Picea obovata along elevational gradient in Western Sayan mountains, Siberia

et al. 2018

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In mountain ecosystems, plants are sensitive to climate changes, and an entire range of species distribution can be observed in a small area. Therefore, mountains are of great interest for climate-growth relationship analysis. In this study, the Siberian spruce"s (Picea obovata Ledeb.) radial growth and its climatic response were investigated in the Western Sayan Mountains, near the Sayano-Shushenskoe Reservoir. Sampling was performed at three sites along an elevational gradient: at the lower border of the species range, in the middle, and at the treeline. Divergence of growth trends between individual trees was observed at each site, with microsite landscape-soil conditions as the most probable driver of this phenomenon. Cluster analysis of individual treering width series based on inter-serial correlation was carried out, resulting in two subset chronologies being developed for each site. These chronologies appear to have substantial differences in their climatic responses, mainly during the cold season. This response was not constant due to regional climatic change and the local influence of the nearby Sayano-Shushenskoe Reservoir. The main response of spruce to growing season conditions has a typical elevational pattern expected in mountains: impact of temperature shifts with elevation from positive to negative, and impact of precipitation shifts in the opposite direction. Chronologies of trees, growing under more severe micro-conditions, are very sensitive to temperature during September-April and to precipitation during October-December, and they record both inter-annual and long-term climatic variation. Consequently, it would be interesting to test if they indicate the Siberian High anticyclone, which is the main driver of these climatic factors.

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Section: Growth Patterns Of Sprucementioning

confidence: 90%

Divergent growth trends and climatic response of Picea obovata along elevational gradient in Western Sayan mountains, Siberia

et al. 2018

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“…The distribution of vegetation differs based on elevation and slope aspect, with coniferous forests dominating the north-facing slopes, and steppe and hemiboreal forests prevalent on south-facing slopes, called 'expositional forest-steppe' (Sedel'nikov 1979, Wilmking et al 2004, Dulamsuren et al 2005b, Kulagin et al 2006, Chytry et al 2008, Kharuk et al 2009, 2010a, 2010b, Timoshok et al 2014. Species composition differs among the different sub-regions within the Altay-Sayan Mountains.…”

Section: Methodsmentioning

confidence: 99%

3D simulation of boreal forests: structure and dynamics in complex terrain and in a changing climate

Brazhnik

Shugart

2015

Environ. Res. Lett.

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To understand how the Siberian boreal forests may respond to near-future climate change, we employed a modeling approach and examined thresholds for significant and irreversible changes in forest structure and composition that are likely to be reached by mid-21st century. We applied the new spatially-explicit gap-dynamics model SIBBORK toward the understanding of how transition zones, namely treelines, which are notoriously undersampled and difficult to model, may change in the near future. We found that a 2°C change in annual average air temperature significantly altered the structure, composition, and productivity of boreal forests stands both in the northern and the southern treeline ecotones. Treeline migration occurs at smaller temperature changes. Based on the current (1990-2014) observed warming trends, a 2°C increase in annual average temperature compared to historical climate ) is likely to be experienced at the northern treeline by 2040 and at the southern treeline by 2050. With regards to the forest biome, the most significant warming to date has been predicted and observed in Siberia. A 2°C increase in annual average temperature compared to the second half of the 19th century is smaller than the predictions of even the most conservative RCP2.6 climate change scenario (IPCC 2013), and has previously been assumed to not likely result in dramatic changes to ecosystems or biome shifts. We show that at a +2°C change, biome shifts from forest to steppe are likely to occur across a large area in southern Siberia. These changes in land cover will inevitably result in changes in the biodiversity, carbon storage, and the ecosystem services provided by the boreal forests of southern Siberia.

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“…A relatively weak but significant common signal, especially in the std chronologies, the low variability and the sensitivity of chronologies, combined with relatively low level of autocorrelation, are indirect evidence of a substantial contribution of growing conditions at the level of individual trees (Picea obovata, Babushkina et al, 2018;cf. Barber et al, 2000;Kulagin et al, 2006;Savva et al, 2006;Sidor et al, 2015;Lei et al, 2016). Nevertheless, the climate also has an important effect on the tree growth, causing the similarity in A. sibirica and P. sibirica chronologies on the sunlit southwestern and eastern slopes and the common pattern of their correlations with temperature.…”

Section: Main Patterns Of Radial Growth and Its Climatic Responsementioning

confidence: 99%

Sunshine as culprit: It induces early spring physiological drought in dark coniferous (Pinus sibirica and Abies sibirica) alpine forest

Zhirnova

Babushkina

Belokopytova

et al. 2019

Forest Ecology and Management

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Trees comprising high mountain forests have different requirements for site conditions (such as the water supply), thus current climate warming leads to varying reactions of upper forest boundaries depending on the site conditions and ecophysiological features of species. Positive reactions to an increasing heat supply during vegetative season may be hindered for drought-sensitive species by a water deficit in a cold environment, particularly during late winter or early spring. We investigated the radial growth of dark coniferous forest species Siberian stone pine (Pinus sibirica Du Tour) and Siberian fir (Abies sibirica Ledeb.) growing on slopes of different orientation (south-west, east, and north) near the upper forest boundary in an area undergoing fast climate warming: the Western Sayan Mountains (South Siberia, Russia), near a massive water reservoir. Correlations of tree-ring width chronologies with moving 21-day temperature series were used to more precisely determine the timing of temperature influence; an analysis of extreme and optimal years and multifactor regression modeling were applied to assess the most favorable / unfavorable thermal conditions in the study area and to estimate the tree growth reaction to the current climatic trends, respectively. Despite relatively low variation in growth (standard deviation less than 0.2), a significant common climatic signal in tree-ring width was found at all sampling sites. On the shaded northern slopes, P. sibirica is only mildly limited by summer temperatures and has a low similarity (correlations and synchronicity of extreme / optimal years) with other sites. Conversely, the growth of A. sibirica and P. sibirica on two sunlit slopes is similar (r = 0.44-0.81) and has a common pattern of regulation by temperatures before (r =-0.17…-0.40; April 3-May 4 on average) and more significantly during vegetative season (r = 0.31…0.44; May 17-August 27 on average). We hypothesize that both species, being drought-sensitive, undergo water stress in the early spring, and exposition of previous years' needles to severe temperature variation may lead to partial defoliation and xylem embolism, thus suppressing growth. The patterns of climatic response and species distribution on slopes indicate that A. sibirica is more sensitive to this physiological drought and needs gentler slopes than P. sibirica. Temperature increase in the study area during the last decades have occured about five times faster in the early spring (being enhanced by the reservoir) than in summer. This combination of spring and summer warming leads to an increase in P. sibirica radial growth on the northern slope and the stable growth of both species on sunlit slopes, i.e. providing a tentatively optimistic assessment of the dark coniferous forests' near future in the region.

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Specific features of the growth of Siberian spruce (Picea obovata Ledeb.) at early stages of ontogeny in broadleaf-conifer forests of the Ufa plateau

Cited by 7 publications

References 0 publications

Divergent growth trends and climatic response of Picea obovata along elevational gradient in Western Sayan mountains, Siberia

Divergent growth trends and climatic response of Picea obovata along elevational gradient in Western Sayan mountains, Siberia

3D simulation of boreal forests: structure and dynamics in complex terrain and in a changing climate

Sunshine as culprit: It induces early spring physiological drought in dark coniferous (Pinus sibirica and Abies sibirica) alpine forest

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