Dynamics of Spruce Population Under the Canopy of Birch Forests of the Southern Taiga of the Russian Plain

The purpose of the research is studying features of daily activity of different blood-sucking mosquito species from the southern taiga subareas, and aspen and birch forests of the Tyumen Region woodland and forest-steppe zone. Materials and methods. The researches were conducted in 2005–2015 in the south of the Tyumen Region in three natural environment and climatic areas (subareas), namely, the southern taiga, the aspen and birch forests, and the forest-steppe zone. The surveys were carried out in each of three subareas twice in the summertime, namely, in June and July. The census of biting mosquitoes was held using an entomological net with detachable sacs. An interval between the censuses held was 2 hours. The temperature, relative air humidity, wind velocity and precipitation were recorded simultaneously. In determining a species composition of the blood-sucking mosquito imago, special identification tables were applied; specific names were given in accordance with the current list of valid specific names. Results and discussion. Blood-sucking mosquito number in the south of the Tyumen Region is high within 24 hours. The maximum number and a peak in species diversity were observed at 11 p.m. in all-natural environment and climatic areas of the Region. In studying a 24-hour rhythm, attacks by 29 mosquito species of the Culicidae family, which belong to five genera, namely, Anopheles, Culiseta, Coquillettidia, Aedes and Culex were detected. In terms of temperature, they can roughly be divided into two groups. The first group (10 species) includes species that attack actively at 10 to 20°С, and the second group (19 species) includes species that attack actively at 10 to 30°С. High flight activity of mosquitoes can be observed at 12.6–26°С, relative air humidity of 54–99% and light intensity of 0–8600 lux. Given night temperatures are relatively high, the main factor that limits mosquito night activity is fog occurrence with air humidity up to 100%. One of the limiting factors for mosquitoes is strong wind; when wind velocity was 5 m/sec, attacks by few individual mosquitoes were only detected. The female mosquito activity is influenced by their overall number – the higher the mosquito number is, the harder they find a feeder and receive required blood meal.

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Assessment of phenotypic plasticity of spruce species Picea abies (L.) Karst. and P. obovata (Ledeb.) on provenances tests in European North of Russia

Central European Forestry Journal ◽

10.2478/forj-2019-0012 ◽

2019 ◽

Vol 65 (2) ◽

pp. 121-128

Author(s):

Elena Nakvasina ◽

Nadezhda Demina ◽

Nadezhda Prozherina ◽

Natalia Demidova

Keyword(s):

Phenotypic Plasticity ◽

Picea Abies ◽

Southern Taiga ◽

Russian Plain ◽

Distribution Area ◽

High Plasticity ◽

The North ◽

European North ◽

Northern Areas ◽

Spruce Stands

Abstract Phenotypic plasticity of 22 spruce provenances in three test plots located in the European North of Russia was studied. Parent spruce stands are located within the Russian Plain and are represented by Picea abies (L.) Karst., P. obovata (Ledeb.) and two introgressive hybrids. In the test plots located in the middle and southern taiga subzones P. abies provenances are tested northward of its distribution area and P. obovata provenances are tested within the distribution area and nearby its boundaries. phenotypic plasticity of the spruce provenances was assessed. Straight-line regression coefficient based on survival, diameter, and height was calculated. All provenances are divided into two groups: plastic and non-plastic provenances. High plasticity is observed more often for P. abies and hybrids forms with properties of P. abies. Plastic provenances based on three parameters grow in the Leningrad, Pskov, Vologda, Kostroma and Karelia. Area of parent stands growing is quite small-size and lies between 56º30´ – 61º40´ N and 30º30´ – 42º30´ E. Adaptive provenances of P. obovata and its related hybrids forms grow in the North-Eastern part of the Russian Plain that could be consequence of its distribution in Holocene. Picea abies being the more adaptive species would be more responsive to climate changes in terms of survival and growth rate than P. obovata. Therefore, in case of sustainable climate warming in the Northern areas of the Russian Plain, the further propagation and major distribution of P. abies with further competitive replacement of P. obovata can be expected.

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Features of the daily dynamics of trophic activity of various types of blood-sucking mosquitoes (Diptera, Culicidae) in the south of Tyumen region

Biosystems Diversity ◽

10.15421/011819 ◽

2018 ◽

Vol 26 (2) ◽

pp. 123-127

Author(s):

T. A. Khlyzova

Keyword(s):

Air Temperature ◽

Steppe Zone ◽

Southern Taiga ◽

Summer Season ◽

Forest Steppe ◽

The South ◽

Climatic Zones ◽

Blood Sucking ◽

The Family ◽

Birch Forests

We conducted research on the determination of the daily activity of blood-sucking mosquitoes of the family Culicidae in 2005–2015 in the south of Tyumen region in three climatic zones (subzones): the subzone of the southern taiga (Nizhnetavdinsky district), the subzone of aspen-birch forests (Tyumen and Yalutorovsky districts) and in the forest-steppe zone (Isetsky district). In each of the three subzones, counts were conducted twice for the summer season – in June and July. A high number of blood-sucking mosquitoes in the south of the Tyumen region have 24-hour activity. The maximum number in all natural and climatic zones of the region is observed at 23 hours. The daily rhythm of activity of certain species of mosquitoes depends on their abundance in the summer season and on their ecological characteristics. The optimal meteorological conditions under which an active flight of mosquitoes are observed: air temperature 12.6–26.0 °C, relative humidity of air – 54–100% and illuminance – 0–8600 lux. In studying the circadian rhythm, 29 mosquito species of the family Culicidae, belonging to 6 genera: Anopheles, Culiseta, Coquillettidia, Aedes, Ochlerotatus and Culex, were recorded. In the subzone of the southern taiga, we recorded a flight of 25 species, in the subzone of small-leaved aspen-birch forests – 20, and in the forest-steppe zone – 24. The peak of species diversity in all three subzones coincided with the maximum number. All registered species in terms of temperature preferences (thermophilicity) can be conditionally divided into two groups. The first group (10 species) are species that actively attack at a temperature 10–20 °C. The second group (19 species) are species that actively attack at an air temperature 10–30 °C.

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Birch forests productivity in Udmurt Republic

FORESTRY BULLETIN ◽

10.18698/2542-1468-2020-6-12-18 ◽

2020 ◽

Vol 24 (6) ◽

pp. 12-18

Author(s):

R.R. Absalyamov ◽

◽

D.A. Pozdeev ◽

S.L. Absalyamova ◽

M.V. Yakimov ◽

...

Keyword(s):

Russian Federation ◽

Southern Taiga ◽

European Part ◽

Taiga Zone ◽

Different Types ◽

Udmurt Republic ◽

The Russian Federation ◽

Taiga Forests ◽

Area Data ◽

Birch Forests

The results of research on the productivity of birch stands on the territory of the Udmurt Republic belonging to the region of southern taiga forests of the European part of the Russian Federation, the taiga zone are presented. The dynamics of the area and reserves of birch forests in the Udmurt Republic is analyzed. Based on the sample area data, changes in the percentage of business wood yield were revealed depending on the type of forest, the composition coefficient and the age of the forest element stand. A comparison of birch stocks growing in different types of forests is made.

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The Features of Floristic Composition and Community Structure of the Birch Forests in the Forest-to-Bog Ecotones in the South of the Vasyugan Plain

Journal of Siberian Federal University Biology ◽

10.17516/1997-1389-0314 ◽

2020 ◽

pp. 25-43

Author(s):

Nina V. Klimova ◽

Natalia A. Chernova ◽

Art’em N. Nikiforov ◽

Anatoliy G. Dyukarev

Keyword(s):

Community Structure ◽

Plant Species ◽

Chemical Properties ◽

Floristic Composition ◽

Southern Taiga ◽

Ground Vegetation ◽

Carbonate Content ◽

North East ◽

High Carbonate ◽

Birch Forests

The present study addresses the floristic composition and ecological and community structure of paludified birch forests (peat depth reaching 30 cm) in the southern taiga. The growing conditions were evaluated based on the indicator values of plants and soil chemical properties. The study plots were located on transects directed from upland forests through peripheral wetland forests to bogs, which are situated in topographic lows, at the North-East edge of the Great Vasyugan mire. The sites of the forest-to-bog ecotone that are transformed to various degrees by the bog water regime are considered as successive stages of paludification. Because of the high carbonate content of the soil-forming rocks dominated by heavy clay particles and waterlogging by ground-mire waters, wet green forests without a developed moss cover form here on rich peat-humus soils at the initial stages of hydromorphic transformation of the plant community. This is in contrast to typical plant successions, which develop on carbonate-free sediments and whose development is associated with the effect of acid bog waters. Reed grass (Calamagrostis phragmitoides C. Hartman) dominates the ground vegetation, which also includes sedges (Carex canescens L., C. vaginata Tausch., C. disperma Dew.). The high contents of mineral nutrients in organics-accumulating dark humus soils determines the high floristic diversity of paludified birch forests, comparable with the diversity of upland communities. A significant part of the ground cover of these forests (25% of the species composition, up to 50% of the projective cover) is represented by nutrient-demanding forest- and meadow-swamp plant species, which commonly occur in eutrophic boreal forested swamps of West Siberia with groundwater input. These species are absent in the mesotrophic paludified taiga forests. At a later stage of hydromorphic transformation, pine-birch shrub-moss forests form on peat-humus-gley and peat-gley soils. As the nutrient availability of soils declines, the number of plant species decreases, and plant species with lower nutrient requirements begin to predominate. This leads to the ecological restructuring of wet communities and makes them similar to paludified forests on carbonate-free sediments; peat accumulation begins with the deposition of mesotrophic peat. Thus, a more substantial change occurs in the ecological structure of plant communities on high-carbonate clays during their hydromorphic transformation compared to the typical mesotrophic paludification of dark-coniferous forests on loams

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Prospect assessment of unergrowth spruce under canopy of birch forests in southern taiga

FORESTRY BULLETIN ◽

10.18698/2542-1468-2020-4-12-18 ◽

2020 ◽

Vol 24 (4) ◽

pp. 12-18

Author(s):

A.A. Deryugin ◽

◽

Yu.B. Glasunov ◽

Keyword(s):

Southern Taiga ◽

Birch Forests

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Thermal field of the southern taiga landscape of the Russian plain

Izvestiya Rossiiskoi Akademii Nauk Seriya Geograficheskaya ◽

10.31857/s2587-55662019251-68 ◽

2019 ◽

pp. 51-68 ◽

Cited By ~ 1

Author(s):

Yu. G. Puzachenko ◽

A. S. Baibar ◽

A. V. Varlagin ◽

R. B. Sandlersky ◽

A. N. Krenke

Keyword(s):

Heat Flux ◽

Thermal Field ◽

Direct Interaction ◽

Southern Taiga ◽

Order Parameters ◽

Ground Layer ◽

Russian Plain ◽

Transition Zones ◽

Wave Channel

The technology of allocation of order parameters (invariants) of the spatial structure of the thermal field of the southern taiga landscape (Central Forest Nature Reserve) obtained on the basis of the analysis of the time series of measurements in the long-wave channel of Landsat satellites from 1986 to 2017 and reflecting its stationary state is considered. It is shown that the heat flux is measured by the satellite not directly from the forest crowns, but from the ground layer of the atmosphere, the state of which is determined by the parameters of the landscape. It is found that the invariant component of the spatiotemporal variation of the thermal field is displayed by two order parameters: the first mainly reflects the temperature of winter months, the second – of summer. The contribution of relief and vegetation to the determination of invariants and the autochthonous components of the thermal field determined by the transition zones between the landscape elements contrasting in thermal radiation are revealed. It is shown that the thermal field measured by the satellite reflects the heat flux from the ground layer of the atmosphere, which is in direct interaction with the landscape cover.

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REGIONAL FEATURES OF LITHOLOGICAL AND GEOMORPHOLOGICAL STRUCTURE OF THE CENTER OF THE RUSSIAN PLAIN

Geomorphology RAS ◽

10.15356/0435-4281-2017-4-76-90 ◽

2018 ◽

pp. 76-90

Author(s):

N. G. Sudakova ◽

S. I. Antonov ◽

A. I. Vvedenskaya ◽

V. A. Kostomakha

Keyword(s):

Russian Plain ◽

Regional Features

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Diatoms in waterbodies and watercourses of Privolzhskaya Hills (Penza Region)

Novosti sistematiki nizshikh rastenii ◽

10.31111/nsnr/2008.42.24 ◽

2008 ◽

Vol 42 ◽

pp. 24-35

Author(s):

M. S. Kulikovskiy

Keyword(s):

Species Composition ◽

Complete List ◽

Russian Plain ◽

Taxonomic Analysis

Species composition of diatoms from different waterbodies and watercourses Privolzhskaya Hills (Penza Region, Russian Plain, Russia) is studied. The complete list of revealed species of centric and pinnate diatoms (299 taxa) and a brief taxonomic analysis are given. The name Sellaphora bacilloides is validated.

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