scholarly journals Connection between the percentage of late wood and wood density in Scots pine from the southern taiga zone of the European part of Russia

10.12737/3340 ◽  
2014 ◽  
Vol 4 (1) ◽  
pp. 21-26
Author(s):  
Киселева ◽  
Aleksandra Kiseleva ◽  
Хван ◽  
Yuriy Khvan
Keyword(s):  
Environmental Factors ◽  
Scots Pine ◽  
Southern Taiga ◽  
European Part ◽  
Pine Forest ◽  
Taiga Zone ◽  
Late Wood ◽  
European Part Of Russia ◽  
Growing Conditions ◽  
Southern Taiga Zone

There is a relationship between the properties of wood. Percentage of late wood – wood macrostructure characterization is a definite relation to density. This relationship varies slightly depending on the species and environmental factors. Establishment of interrelation of these parameters for wood from different regions and growing conditions, will more accurately judge the quality indicators of wood in specific circumstances. The studies were conducted with a timber of Scots pine growing in the Vologda region. In Ustyuzhansky Forestry two sites differing in conditions of growth are selected - lichen pine forest and blueberry and cranberry pine forest.

scholarly journals IXODES TICK-BORNE BORRELIOSES: MODERN EPIDEMIOLOGICAL SITUATION IN THE CENTER OF THE EUROPEAN PART OF RUSSIA

2017 ◽  
Vol 25 (2) ◽  
pp. 202-208
Author(s):  
М. V. Polishchuk ◽  
T. D. Zdol'nik ◽  
V. N. Smetanin
Keyword(s):  
Lyme Disease ◽  
Distribution Patterns ◽  
Southern Taiga ◽  
European Part ◽  
Economic Damage ◽  
Forest Steppe ◽  
Taiga Zone ◽  
Zoonotic Infections ◽  
European Part Of Russia ◽  
Epidemiological Characteristics

Ixodes tick-borne borrelioses occupy one of the leading places in terms of morbidity and socio-economic damage among the natural foci of zoonotic infections in our country. Expansion of the range distribution of pathogens Lyme disease along with the widespread increase in the size of the main vectors of infection (ticks) determines the relevance of the study of the epidemiological characteristics of Lyme disease in areas that until recently were considered safe from the disease. This study was conducted to identify the level, dynamics and disease distribution patterns of Ixodes tick-born borreliosis in areas of Сentral European part of Russia, located in different climatic zones. Based on statistical data and reports from the Russian Federal Service for Oversight of Consumer Protection and Welfare- Rospotrebnadzor and Center of Hygiene and Epidemiology in Moscow, Ryazan and Tula regions for the 1992-2015 years, it has been shown that the incidence of Lyme disease increases moving from south to north as well as from the forest-steppe natural-climatic zone to the southern Taiga zone. The most epidemiologically disadvantaged region by Ixodes tick-born borreliosis amongst the studied regions was Moscow region, where the average annual incidence rate was 2,6 per 100 000 population. In all three areas, despite the differences in the species composition of mites and their degree of infection, there is an annual increase in morbidity due to Lyme borreliosis. The findings confirm the need for preventive measures against Ixodes tick-born borreliosis, the most significant being territorial coverage with acaricidal treatments.

scholarly journals Formation of pine wood density depending on the parameters of annual ring and latitudinal zoning

2021 ◽  
Vol 875 (1) ◽  
pp. 012035
Author(s):  
A V Kiseleva ◽  
S N Snegireva ◽  
A D Platonov
Keyword(s):  
Wood Density ◽  
Annual Ring ◽  
Ring Width ◽  
Steppe Zone ◽  
Southern Taiga ◽  
Forest Steppe ◽  
Taiga Zone ◽  
Annual Ring Width ◽  
Late Wood ◽  
Southern Taiga Zone

Abstract The article presents the results of studies of changes in wood density depending on annual ring width and its characteristics. Density is a basic indicator for assessing operational and technical properties of wood. At the same time, density is characterized by certain variability within the same species, depending on annual ring characteristics, influenced by environmental factors, age of trees and position in the trunk. The purpose of this study is to establish the formation of density depending on annual ring width and late wood for Scots pine (Pinus sylvestris L.) wood in the central European part of Russia. Density research was made using the specimens with one annual ring by the method of buoyancy. Absolute values of the annual ring of early and late wood were measured in cores. It was found that wood density is only influenced by late wood width in the annual ring, being under strict genetic control. In the southern taiga zone correlation between density and late wood width is varying between 0.49-0.66 and it is less than in the forest-steppe zone. The correlation of density with annual ring width in the southern taiga zone is 0.5. It is less than in the forest-steppe zone (0.57-0.81).

scholarly journals Fuel characteristics, loads and consumption in Scots pine forests of central Siberia

2019 ◽  
Vol 31 (6) ◽  
pp. 2507-2524
Author(s):  
Galina A. Ivanova ◽  
Elena A. Kukavskaya ◽  
Valery A. Ivanov ◽  
Susan G. Conard ◽  
Douglas J. McRae
Keyword(s):  
Scots Pine ◽  
Southern Taiga ◽  
Pine Forest ◽  
Ground Vegetation ◽  
Fuel Loading ◽  
Fire Weather Index ◽  
Central Siberia ◽  
Feather Moss ◽  
Fuel Characteristics ◽  
The Impact

Abstract Forest fuel investigations in central and southern Siberian taiga of Scots pine forest stands dominated by lichen and feather moss ground vegetation cover revealed that total aboveground biomass varied from 13.1 to 21.0 kg/m2. Stand biomass was higher in plots in the southern taiga, while ground fuel loads were higher in the central taiga. We developed equations for fuel biomass (both aerial and ground) that could be applicable to similar pine forest sites of Central Siberia. Fuel loading variability found among plots is related to the impact and recovery time since the last wildfire and the mosaic distribution of living vegetation. Fuel consumption due to surface fires of low to high-intensities ranged from 0.95 to 3.08 kg/m2, that is, 18–74% from prefire values. The total amount of fuels available to burn in case of fire was up to 4.5–6.5 kg/m2. Moisture content of fuels (litter, lichen, feather moss) was related to weather conditions characterized by the Russian Fire Danger Index (PV-1) and FWI code of the Canadian Forest Fire Weather Index System. The data obtained provide a strong foundation for understanding and modeling fire behavior, emissions, and fire effects on ecosystem processes and carbon stocks and could be used to improve existing global and regional models that incorporate biomass and fuel characteristics.

scholarly journals Assessment of the decorative qualities of species of the genus Pinus L. in the conditions of the European part of Russia

2021 ◽  
Vol 845 (1) ◽  
pp. 012066
Author(s):  
M V Simakhin ◽  
S V Tazina ◽  
V A Kryuchkova ◽  
I I Tazin
Keyword(s):  
Visual Perception ◽  
European Part ◽  
The State ◽  
Pinus Patula ◽  
Point Scale ◽  
Research Results ◽  
Aesthetic Appeal ◽  
European Part Of Russia ◽  
Growing Conditions ◽  
Generative Organs

Abstract The paper presents the results of a study of the decorativeness of pines, which are actively grown on the territory of the European part of Russia. Decorativeness is based on the visual perception of plant habitus. The state of the habitus depends on the genotype and adaptive characteristics in certain growing conditions. The study examined 25 decorative features of 56 species. 24 traits were related to vegetative and generative organs. 1 trait was assessed by the method of weight taxonomy as an indicator of originality of all species for 24 traits. Studies have shown that the total score on a 100-point scale of decorativeness in the studied pines varies from 40 in Pinus heldreichii Chirst and Pinus waschoensis Mason & Stockwell to 68 in Pinus patula Schltdl. & Cham. The research results can be applied when choosing species for cultivation on landscaping objects to increase their aesthetic appeal.

scholarly journals Hylobius species (Coleoptera: Curculionidae) from Siberia and the distribution patterns of adults feeding in Scots pine stands

2000 ◽  
Vol 11 (1) ◽  
pp. 57-66
Author(s):  
Andrei Gourov
Keyword(s):  
Scots Pine ◽  
Distribution Patterns ◽  
Steppe Zone ◽  
Southern Taiga ◽  
Forest Steppe ◽  
Taiga Zone ◽  
Mature Trees ◽  
Additional Food ◽  
Pine Stands ◽  
Scots Pine Stands

Seven Hylobius species are known from Siberia, while the occurrence of three of them is doubtful. Information available about the supplementary feeding of adult weevils is reviewed. It is likely that H. abietis and H. albosparsus are the only species of economic significance in this territory. In the northern forest-steppe zone, adult weevils usually prefer to feed separately on isolated or border young trees under the canopy of light Scots pine stands, but avoid the undercanopy regeneration in the dense stands. In the southern taiga zone, adults are abundant on cutover areas where they feed in clumps of young regeneration. In fresh clearcuts, up to 100% of juvenile trees may be damaged by the feeding of weevils, whereas the damage intensity declines sharply with the distance to the clearcut. An edge effect in the distribution of adult weevils needs verification and, probably, is time-dependent. Inside the stands, the crowns of mature trees may constitute an additional food niche for adults if the usual sources and preferred environmental conditions are not available.

Natural reforestation effect on soil organic carbon and СО2 flux dynamics in southern taiga ecosystems with Albeluvisols

2020 ◽  
Author(s):  
Ivan Vasenev ◽  
Tatyana Komarova ◽  
Solomon Melese
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Air Temperature ◽  
Natural Regeneration ◽  
Land Use Changes ◽  
Southern Taiga ◽  
Maximum Intensity ◽  
Taiga Zone ◽  
Southern Taiga Zone

<p><strong>Introduction.</strong> Natural reforestation is the widespread trend in the modern land-use changes in the southern taiga zone at the European territory of Russia after 1990s. Its total area is more than 10 million ha. At the same time forest natural regeneration is mutual usual process in the long-term land-use changes in this part of Russia with complex history of its development during millennium. It plays crucial role in soil successions, their fertility and environmental function dynamics including bio productivity support and carbon sequestration, which is given special attention against the background of global climate change challenges in the twenty-first century. This paper presents the results of a round-the-year monitoring of soil CO<sub>2</sub> emission in comparable sites of the fallow lands chrono sequences in conditions of a representative area of the Central Forest Reserve with background wood-sorrel spruce forests which are typical for the southern taiga zone of Central Russia.</p><p><strong>Objects and methods. </strong>The dominant soil type is sandy-loam Albeluvisols (by WRB, or Orthopodzolic soil by Russia Taxonomy, or Alfisols by Soil Taxonomy, or Podzoluvisols by FAO). The studies have been done in the representative 5 sites at different age of natural reforestation: (1) Fallow meadow grassland – “0-moment”; (2) Forest-fallow birch domination stage of 10-15 year; (3) Birch domination stage of 20-30 year with young spruce participation; (4) Birch-forest stage of 50-60 year with spruce participation; (5) Spruce-forest after fallow stage of more than 100 year with birch participation. CO<sub>2</sub> fluxes seasonal and diurnal dynamics measuring were carried out in situ using a mobile gas analyzer Li-820 and soil exposure chambers with parallel measurements of air temperature, soil temperature and moisture. Also, biomass, soil organic carbon and bulk density were analyzed in their topsoil and subsoil horizons with C stock calculation.</p><p><strong>Results and discussion.</strong> Analysis of the successional dynamics of the topsoil organic carbon stock showed the maximum rate of their increasing in the first stages of natural reforestation by a thick undergrowth of birch (more than 30 g m<sup>-2</sup>∙year<sup>-1</sup>) that agrees well with the maximum intensity of the woody biomass growth in case of dominant birch forest up to 50-60 years (more than 100 g m<sup>-2</sup>∙year<sup>-1</sup>). Research revealed the maximum intensity of soil CO<sub>2</sub> emission (up to 11-12 g C-CO<sub>2</sub> m<sup>-2</sup>∙day<sup>-1</sup>) in the meadow fallow land and its gradual decreasing in process of reforestation down to values close to background ecosystems in 4-5 g C-CO<sub>2</sub> m<sup>-2</sup>∙day<sup>-1 </sup>in the last investigated succession study with wood-sorrel spruce older than 100 years, which is in good correlation with the gradual humus accumulation in topsoil due to reduced mineralization of organic compounds from dying vegetation. The seasonal and daily dynamics of soil CO<sub>2</sub> emissions are determined by soil temperature (K<sub>TS</sub> 0.77 - 0.99), air temperature (K<sub>TA</sub> 0.42 - 0.99), and soil moisture in spring and fall (K<sub>WS</sub> -0.55 - -0.98).</p><p><strong>Conclusions. </strong>Investigation of forest natural regeneration impacts on the level of soil organic carbon accumulation and CO<sub>2</sub> fluxes in the representative southern taiga ecosystems is important element of their soil environmental monitoring and management.</p>

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