Kaybasovo Poplar Forests (the Ob River, Tomsk Oblast, the Southern Taiga Subzone)

2021 ◽  
pp. 43-60
Author(s):  
Georgy S. Taran ◽  
Alexander P. Dyachenko ◽  
Valery N. Tyurin
Keyword(s):  
Vascular Plant ◽  
Southern Taiga ◽  
Forest Steppe ◽  
Research Station ◽  
Taiga Zone ◽  
Tomsk Oblast ◽  
Species Saturation ◽  
Ob River ◽  
New Variant ◽  
Southern Taiga Subzone

The Ob River basin is the last large fragment of the range of native Euro-Siberian poplar (Populus nigra, Populus alba) forests where these forests remain intact. The taiga section of the Ob River is occupied by the association Anemonidio dichotomi-Populetum nigrae Taran 1993, and the subtaiga, forest-steppe, and steppe sections are occupied by the association Equiseto hyemalis-Populetum nigrae Taran 1997. The purpose of the study is to determine the syntaxonomic status of poplar forests growing at the junction of the southern taiga and subtaiga subzones and to provide a detailed bryofloristic characterization thereof. Based on the Braun-Blanquet approach, we studied poplar forests located near the south border of the Ob River southern taiga section (Krivosheinsky district, Tomsk Oblast, Russia, surroundings of the Kaybasovo research station, 57º14′44″N, 84º11′05″E). In the forests, average species saturation by vascular plant species is 32.3 species per 100 m2, and its range is 13–56 species/100 m2. Moss flora includes 51 species. Average species saturation by mosses is 15.4 species per 100 m2, and its range is 10–21 species/100 m2. Based on the new data, total moss flora of the Ob poplar forests has increased from 73 species to 86 species and 1 variety (by 19 %), moss flora of the poplar forests of the taiga zone – from 59 species to 81 species and 1 variety (by 39 %). We identify Kaybasovo poplar forests as the new variant, Stellaria bungeana, of the subassociation Equiseto hyemalis-Populetum nigrae betuletosum pubescentis Taran 1997 (Equiseto hyemalis-Populion nigrae Taran 1997, Salicetalia purpureae Moor 1958, Salicetea purpureae Moor 1958)

The concentration of Mn, Cu, Zn, Co, B, Sr, Cd and Pb in alluvial soils of the Ob River (forest-steppe, southern taiga and central taiga)

2014 ◽  
Vol 71 (5) ◽  
pp. 691-697 ◽  
Author(s):  
L.A. Izerskaia ◽  
S.N. Vorobyev ◽  
T.E. Vorobyeva ◽  
L.G. Kolesnichenko ◽  
A.V. Zakharchenko
Keyword(s):  
Southern Taiga ◽  
Forest Steppe ◽  
Alluvial Soils ◽  
Ob River

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.

Vegetation cover of subtaiga landscapes in premountain plain on a right bank of the Ob river

2014 ◽  
pp. 63-85
Author(s):  
N. N. Lashchinskiy ◽  
M. P. Tishchenko ◽  
O. Yu. Pisarenko ◽  
N. V. Lashchinskaya
Keyword(s):  
River Basin ◽  
Vegetation Type ◽  
Wide Distribution ◽  
Southern Taiga ◽  
Forest Steppe ◽  
West Siberian Plain ◽  
The West ◽  
Steppe Species ◽  
Forest Diversity ◽  
Ob River

Vegetation of the right bank of the Ob River in the limits of Novosibirsk area consists of southern taiga, subtaiga and forest-steppe elements. More over, in comparison with neighboring areas on the West Siberian Plain, it contains the significant amount of mountain elements (Kuminova, Vagina, Lapshina, 1963). Natural vegetation of the area belongs to the forest-steppe subzone of the West Siberian province (Il’ina, 1985). Low percentage of forest coverage is caused by anthropogenic deforestation and wide distribution of meadows (Lapshina, 1963). This is the most endangered vegetation in Novosibirsk area. Spatial vegetation structure was studied by using the model of the Ob River basin covered 184 square kilometers. Well-developed system of ravines and small creeks caused a presence of relatively large areas with very low anthropogenic impact which potentially could be the refuges of pristine zonal vegetation. Main vegetation type of this basin is forest which covered about 31% of the area. Forest diversity of model area consists of four syntaxa of association and subassociation ranks belonging to the Brachypodio pinnati–Betuletea pendulae class. Meadow vegetation is presented by five syntaxa from the Molinio-Arrhenatheretea class and mire vegetation — by two syntaxa from the Alneteae glutinosae class. Two subassociations and four variants are described for the first time. The ravine systems could be considered as low-level landscape structures which are the natural refuges with high level of biodiversity and habitats of rare and endangered species. The slope vegetation organized in ecological rows consists of three up to four syntaxa changing from the top to the ravine bottom. The Ob River Basin flora is characterized by insignificant amount of meadow steppe species, well-represented mire flora and a presence of mountain and taiga elements. The most specific floristic features are the presence of ephemeroid species, taiga species and Siberian tertiary nemoral relics (Polozhiy, Krapivkina, 1985). All these features allow us to refer the river basin vegetation to the low-mountain subtaiga type.

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 Association Carici juncellae-Salicetum rosmarinifoliae (Alnetea glutinosae) on the south taiga section of the Ob River floodplain

2019 ◽  
Vol 10 (1) ◽  
pp. 40-49
Author(s):  
Georgy Semenovich Taran ◽  
Alexander Petrovich Dyachenko
Keyword(s):  
Vascular Plants ◽  
Middle Taiga ◽  
Taiga Zone ◽  
The South ◽  
Moss Species ◽  
Species Saturation ◽  
Ob River ◽  
Tree Layer ◽  
First Time ◽  
Geographical Space

The Carici juncellae–Salicetum rosmarinifoliae Korolyuk et Taran in Taran 1993 association (Salicion cinereae, Salicetalia auritae, Alnetea glutinosae) includes the communities of the shrub (Salix rosmarinifolia, S. cinerea)-birch (Betula pubescens) tussock (Carex juncella, C. cespitosa) mires spread on the big West Siberian river floodplains within the taiga zone. On the Ob River, the association is represented by the C.j.–S.r. spiraeetosum salicifoliae Taran 1993 subassociation. Its range covers the Ob floodplain 830-kilometer distance crossing the subtaiga, south taiga and middle taiga subzones of Western Siberia. In the south taiga subzone (surroundings of the former village Kaibasovo, Krivosheinskiy district of Tomsk Region, 57º14'44"N, 84º11'05"E), the C.j.–S.r. spiraeetosum salicifoliae subassociation is studied for the first time. Near the Kaibasovo, the subassociation is represented by two facies: shrubby (Spiraea salicifolia, Salix rosmarinifolia, Salix cinerea) and birch (betulosum pubescentis). The communities of these facies found some floristic differences, which made it possible to attribute them to different variants: var. Cicuta virosa and var. Kadenia dubia. Carex juncella, C. cespitosa and Comarum palustre dominate in the field layer of the tussock mires. In the C.j.–S.r. spiraeetosum salicifoliae subassociation communities near the Kaibasovo, the average total projective cover (TPC) of the tree layer is 7%, shrubs – 34%, grasses – 48%, tussocks – 20%, ground mosses – 14%. Average tussock height is 59 cm. Average species saturation of the communities is 27 species of vascular plants and 18 species of mosses per 100 m2, the volume of the local coenoflora is 39 species of vascular plants and 28 species of mosses. Six moss species (Brachytheciastrum velutinum, Bryoerythrophyllum recurvirostrum, Bryum moravicum, Fissidens bryoides, Plagiomnium cuspidatum, Pylaisia selwynii) were found in the Ob communities of the C.j.–S.r. spiraeetosum salicifoliae for the first time. Due to this, the total volume of the moss flora of the subassociation Ob stands increased to 74 species. The analysis of the variability of the main coenotic and floristic parameters of the C.j.–S.r. spiraeetosum salicifoliae subassociation in the geographical space of the Ob floodplain (from the subtaiga subzone to the middle taiga one) is carried out. The main regularities of these shifts are revealed. The volume of the subassociation local vascular coenoflora (52-53 species) and average species saturation of the communities by vascular plants (20-21 species per 100 m2) are stable on the most of the Ob floodplain sections. At the same time, changes are observed downstream of the Ob River, which can be interpreted as an intracoenotic response of the subassociation communities to smooth changes in the ecological regime of the floodplain when moving in geographical space from south to north. Thus, from the south to the north, many average parameters increase in the subassociation communities, namely: the height of trees, TPCs of tree layer, tussocks and ground mosses, the species saturation with mosses (from 4 to 18 species per 100 m2). The species richness of local moss floras also increases from 11 to 54 species. On the contrary, the average TPCs of shrub and field layers from south to north decrease. A number of deviations from general trends were found in the Kaibasovo birch-shrub tussock mires, namely: high species saturation with vascular plants (27 species per 100 m2), low reach of vascular coenoflora (39 species). The first can be explained by the proximity of the studied mires to the Ob riverbed, the second – by the crowding of the relevés in a relatively small area of the floodplain.

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 Prevalence of the Microsporidian Nosema spp. in Honey Bee Populations (Apis mellifera) in Some Ecological Regions of North Asia

2020 ◽  
Vol 7 (3) ◽  
pp. 111
Author(s):  
Nadezhda V. Ostroverkhova ◽  
Olga L. Konusova ◽  
Aksana N. Kucher ◽  
Tatyana N. Kireeva ◽  
Svetlana A. Rosseykina
Keyword(s):  
Apis Mellifera ◽  
Honey Bee ◽  
Honey Bees ◽  
Climatic Factors ◽  
Southern Taiga ◽  
Forest Steppe ◽  
Taiga Zone ◽  
Percentage Increase ◽  
Ecological Regions ◽  
North Asia

Two species of microsporidia, Nosema apis and Nosema ceranae, are obligate intracellular parasites that are widespread in the world and cause the infectious disease (Nosemosis) of the Western honey bee Apis mellifera. Information on the prevalence and distribution of Nosema species in North Asia conditions is scarce. The main aim of the present study is to determine the prevalence of Nosema spp. (Nosemosis) in honey bees inhabiting some inland regions of North Asia (Western and Eastern Siberia, Altai Territory, Russia, and northeastern part of Kazakhstan). The objective of the paper is also to assess the influence of climatic factors on the spread of N. ceranae. Eighty apiaries in four ecological regions of North Asia (southern taiga, sub-taiga zone, forest steppe, and mountain taiga forests) were investigated with regard to distribution, prevalence, and diversity of Nosema infection in honey bees using duplex-PCR. Nosema infected bees were found in 65% apiaries of ecoregions studied, and coinfection was predominant (36.3% of Nosema-positive apiaries). Both N. apis and N. ceranae occur across subarctic and warm summer continental climates, but while N. apis predominates in the former, N. ceranae is more predominant in the latter. No statistically significant differences in Nosema distribution were identified in various climatic zones. In the sub-taiga zone (subarctic climate), low presence of colonies with pure N. ceranae and a significantly higher proportion of coinfection apiaries were revealed. Long-term epidemiological study of Nosema spp. prevalence in the sub-taiga zone showed a surprising percentage increase of Nosema-positive apiaries from 46.2% to 74.1% during 2012–2017. From 2012 to 2015, N. apis became a predominant species, but in 2016–2017, the coinfection was mainly detected. In conclusion, the results of this investigation showed that N. ceranae is widespread in all study ecoregions of North Asia where it exists in combination with the N. apis, but there is no replacement of N. apis by N. ceranae in the studied bee populations.

Water-Soluble Components in Soils of Heterolithic Conjugate Landscapes in the Southern Taiga Subzone

2021 ◽  
Vol 76 (1) ◽  
pp. 1-10
Author(s):  
L. G. Bogatyrev ◽  
A. I. Benediktova ◽  
M. M. Karpukhin ◽  
V. M. Telesnina ◽  
N. I. Zhilin ◽  
...  
Keyword(s):  
Southern Taiga ◽  
Water Soluble ◽  
Southern Taiga Subzone ◽  
Soluble Components
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