scholarly journals TRANSFORMATION OF THE HALOPHYTIC VEGETATION OF THE “SERDOBSKY SOLONETS” SERDOBSKY DISTRICT, PENZA REGION)

Ekosistemy ◽  
2021 ◽  
pp. 5-11
Author(s):  
L. A. Novikova ◽  
E. V. Mikhailova ◽  
V. M. Vasjukov ◽  
T. V. Gorbushina
Keyword(s):  
Plant Communities ◽  
Environmental Conditions ◽  
Vascular Plants ◽  
Anthropogenic Impact ◽  
Steppe Zone ◽  
Forest Steppe ◽  
South Eastern ◽  
Natural Monument ◽  
High Level

Halophytic vegetation is very rare in the forest-steppe zone. It was studied in the tract Serdobsky solonetsin the vicinity of Serdobsk (Serdobsky district, Penza region). The studies were conducted in the years 2009–2018, using the technique of geobotanical profiling. 80 trial areas were laid (35 in 2009 and 45 in 2008). Ecological and phytocenotic classification of plant communities is performed on the dominant principle. Comparison of two descriptions of vegetation with an interval of 10 years allows us to trace the transformation of halophytic vegetation after intensive anthropogenic impact (grazing and partial plowing) in different environmental conditions. The flora of Serdobsky solonets consists of 179 species of vascular plants, of which 13 species are included in the Red book of the Penza region (2013). The share of halophytic vegetation on the territory of Serdobsky solonetshas changed over 10 years: from 97.0 % to 63.8 %. Moreover, halophyte meadows occupied 67.0 % and halophyte steppes 30.0 % of the area in 2009. Now (2018) halophytic steppes make up 30.8 %, and halophytic meadows 33.0 %.The main stages of demutation of halophytic steppe and meadow vegetation were identified in various environmental conditions (meadows and steppes). The same stages of demutation were identified earlier for the South-Eastern Solonets (Neverskinsky district of the Penza region). However, a special stage of annual saline grasslands has been identified.This place requires protection due to the high level of floral and phytocenotic diversity. We offer to organize here a natural monument called “Serdobsky solonets”.

scholarly journals On the identification of ecological optimum of bryophytes

2016 ◽  
Vol 5 (1) ◽  
pp. 10-14
Author(s):  
Yana Andreevna Bogdanova ◽  
Evgeny Sergeyevich Korchikov ◽  
Natalia Vladimirovna Prokhorova
Keyword(s):  
Plant Communities ◽  
Vascular Plants ◽  
Deciduous Forest ◽  
Graphical Method ◽  
Steppe Zone ◽  
Forest Steppe ◽  
Ecological Optimum ◽  
Occurrence Data ◽  
Quantitative Characteristics ◽  
The Moment

This article describes a method for detecting synecological optima of bryophytes and the possibility of their use in phytoindication of ecological conditions of the biotope. Bryophytes may take a significant part in plant communities, they have the ability to accumulate heavy metals, they can be used to determine the degree of the anthropogenic load and of the formation of forest communities. All this makes them excellent bioindicators, which can give an almost complete description of the plant community. But to do this it is necessary to know the environmental optima of mosses. At the moment, there are sparse data on the environmental characteristics of the bryophytes, it is not always clear how these characteristics were obtained. Currently, there are several ways to determine the environmental optima of the bryophytes based on the occurrence data and the projective cover of mosses. These methods use L.G. Ramenskiy's scales for vascular plants, these scales are extrapolated to bryophytes. Using our experience in defining synecological optima of lichen, we offer a graphical method for identifying ecological optimum of the bryophytes in which A.L. Bellegard's ecomorph scales are applied in the modification of N.M. Matveev (for the forest-steppe zone) and D.N. Tsyganov (for the coniferous-deciduous forest subzone). The essence of this method is the plotting of a graph of the quantitative characteristics of a particular moss depending on the environmental factors. For this you need to carry out phytoindication of the biotope community by using vascular plants and determine the average cover of moss or vitality of this moss

Classification of woody-shrub vegetation of the forest-steppe complex of Privolzhskaya Upland

2009 ◽  
pp. 27-53
Author(s):  
A. Yu. Kudryavtsev
Keyword(s):  
Plant Community ◽  
Plant Communities ◽  
Dominant Species ◽  
Large Scale ◽  
Nature Reserve ◽  
Vegetation Mapping ◽  
Vegetation Classification ◽  
Forest Steppe ◽  
Mapping Data

Diversity of plant communities in the nature reserve “Privolzhskaya Forest-Steppe”, Ostrovtsovsky area, is analyzed on the basis of the large-scale vegetation mapping data from 2000. The plant community classi­fication based on the Russian ecologic-phytocoenotic approach is carried out. 12 plant formations and 21 associations are distinguished according to dominant species and a combination of ecologic-phytocoenotic groups of species. A list of vegetation classification units as well as the characteristics of theshrub and woody communities are given in this paper.

The vegetation of the small rivers of Novosibirsk Region (a syntaxonomic essay)

2019 ◽  
pp. 3-27 ◽  
Author(s):  
L. M. Kipriyanova ◽  
M. A. Kleshchev
Keyword(s):  
Anthropogenic Impact ◽  
West Siberia ◽  
Steppe Zone ◽  
Small Rivers ◽  
Forest Steppe ◽  
Aquatic Communities ◽  
Emergent Plants ◽  
Novosibirsk Region ◽  
General Chemical ◽  
Wide Range

Information on the aquatic and semiaquatic vegetation of the major watercourses of West Siberia is relatively scarce, while this of small rivers is practically absent. There are 430 rivers whose length exceeds 10 km within the Novosibirsk Region. The aim of our work was to study the phytocenotic diversity of their aquatic and semiaquatic vegetation. 130 geobotanical relevés were performed by the authors in July–August 2003–2005. The object was aquatic communities formed by true aquatic (submergent and floating-leaved) plants and semiaquatic ones with emergent plants and these of water′s edge. In total 10 watercourses were studied (Table 1): 2–3 in each of five geomorphologic regions within the forest-steppe zone (Table 2). The upper, middle and lower courses (Fig. 1, Table 1) with the length of 2–2.5 km were studied in each case to ensure the 4–5 repetition of main elements (stream pools and ridges) that would give a reliable information on their flora and vegetation. The sample plots were selected above the settlements, whenever possible in sites with no to intensive anthropogenic impact. The data were collected according to J. Braun-Blanquet (1964) approach. The relevés were done on the sample plot of 100 m2 placed in the most homogeneous part of the community or, in case of its smaller area, within the natural boundaries. The following scale was used for abundance estimation: r — the species is extremely rare; + — rare, small cover; 1 — the number of individuals is large, the cover is small or individuals are sparse, but the cover is large; 2 —cover of 5–25 %; 3 — 26–50 %; 4 — 51–75 %; 5 — more than 75 %. The date on water depth, transparency (on a white Secchi disk with a diameter of 30 cm), temperature and the flow rate were obtained. The soil mechanical composition and color, the degree and nature of anthropogenic impact on vegetation and river banks were quantified. Water samples for general chemical analysis were taken in the middle course of each river. Computer programs TURBOVEG and MEGATAB (Hennekens, 1996) were used for database. The syntaxonomic affiliation of phytocenoses was determined using modern literature (Bobrov, Chemeris, 2006; Vegetace..., 2011; Chepinoga, 2015; Landucci et al. 2015; Mucina et al., 2016, etc.). 36 associations and 3 communities belonging to 12 alliances, 9 orders, and 5 classes have been identified (Tables 3–14, Fig. 2–9). Such great syntaxonomic diversity is determined by the significant ecotopic variety, the variability of substrates, the wide range of water flow rates and the different water trophicity. For comparison, 26 associations, 13 variants, 2 communities were identified in the study of 50 rivers of Lithuania (Sinkyavichene, 1992); altogether 84 associations are known for the Upper Volga region as a whole (Bob­rov, Chemeris, 2006), while 45 ones were recorded previously in 130 watercourses of this region (Bobrov, 1999). Information on small river macroalgae cenoses in the study area is partially reflected in the paper published earlier (Bobrov et al., 2005).

scholarly journals Influence of climatic conditions on productivity and adaptability of Camelina sativa

2020 ◽  
Vol 224 ◽  
pp. 04006
Author(s):  
E L Turina ◽  
T Ya Prakhova
Keyword(s):  
Environmental Conditions ◽  
Steppe Zone ◽  
Camelina Sativa ◽  
Climatic Conditions ◽  
Forest Steppe ◽  
Hydrothermal Conditions ◽  
Middle Volga Region ◽  
Hydrothermal Coefficient ◽  
Climate Conditions ◽  
The Crimea

The purpose of the research is to assess the productivity and adaptability of Camelina sativa depending on the natural and climatic conditions of the forest-steppe zone of the Middle Volga region and the steppe Crimea. The researches were conducted in two regions (Penza and Crimea) with contrasting hydrothermal conditions in 2015–2019 years. Climate conditions in the years of researches were characterized by significant variability in both the degree of humidity and temperature regime in both regions. The hydrothermal coefficient in the Crimea varied in the range of 0.23–1.11, in the conditions of Penza - from 0.45 to 1.10. The index of environmental conditions varied from -0.58 to 1.28 units depending on the natural and climatic zone. On average, in 2015–2019, the productivity of Camelina changed from 1.45 to 1.79 t/ha in Penza and from 0.56 to 1.66 t/ha in Crimea. The highest yield of Camelina sativa was recorded in 2016 in Penza and in 2017 in the Crimea and amounted to 1.79 and 1.66 t/ha, respectively. The value of the index of environmental conditions is 1.17 and 1.28 with hydrothermal coefficient of 0.82 and 0.61, respectively. Depending on the conditions of the year and the region, the oil content varied from 33.9 to 43.9 %. At the same time, there is a tendency to decrease the amount of oil for all years of study in the direction from the Crimea to the zone of the Penza region. Camelina sativa is characterized by a high level of resistance to stressful conditions (0.49– 1.10), differs in environmental adaptability (bi=1.15–1.17), has a high fitness criterion, 41.2–41.5 g/m2, depending on the region.

scholarly journals ECOLOGICAL PLASTICITY OF SPRING OATS IN THE CONDITIONS OF WESTERN SIBERIA

2018 ◽  
Vol 48 (3) ◽  
pp. 21-27
Author(s):  
M. A. Kozyrenko ◽  
V. N. Pakul ◽  
D. E. Androsov
Keyword(s):  
Environmental Conditions ◽  
Western Siberia ◽  
Plant Genetic Resources ◽  
Steppe Zone ◽  
Dispersion Analysis ◽  
Yield Stability ◽  
High Yield ◽  
Forest Steppe ◽  
Ecological Plasticity ◽  
The Usa

The works presents the results of studying 165 specimen of spring oats from the world collection The N.I. Vavilov All-Russian Research Institute of Plant Genetic Resources. The research was conducted in the northern forest-steppe zone of Western Siberia in 2014-2016. The soil on which the research was done can be characterized as leached chernozem, heavy loam by texture and particle size distribution, of medium capacity. The content of humus equals 7.8%, reaction of soil solution is close to neutral, рН is 6.0. In the horizon of 0-40 cm the content of N-NO3 is 35.4mg/kg, P2O5 – 122 mg/kg, K2O – 98 mg/kg. An assessment is given to spring oat specimen by the parameters of ecological plasticity bi and yield stability Si2 . The research was conducted in the conditions characterized in accordance with the index of environmental conditions Ij. The most favourable conditions developed in 2016, when the environment index Ij equaled 109.2. Adverse conditions were identifi ed in 2014, when Ij equaled -46.25, and in 2015, when Ij equaled -62.99. By the results of the dispersion analysis the dominating infl uence of environmental conditions on the yield of spring oat specimen is established at 85.3%, the share of genotype infl uence is 2.6%. Eight specimen of spring oats proved to exceed Creole standard variety by yield with the trait variability being from 29.3% to 87.1%. Sources for creation of intensive type varieties, with high responsiveness to favorable conditions for growth and development are identifi ed: IL 86-1158 (to 14316, the USA), Jumbo (to 14702, Germany), Hamilton (to 14761, the USA), Talisman (to 14785, Russia), Omikho (to 14827, Russia), OA 269 (to 14992, Canada), Stayer (to 15181, Russia), Eclipse (to 15187, Russia). High-yielding genotypes which react to environmental conditions to a medium degree (bi is nearing a unit), and have high yield stability (Si2 is nearing zero) are defi ned, namely Express (to 14505, Russia), bi = 1.04, Si2 = 0.053, Yubilyar (to 14723, Belarus), bi = 0.92, Si2 = 0.070, C.I. 7321 (to 14737, the USA), bi = 1.09, Si2 = 0.076, Vallntin (to 15189, Slovakia), bi = 1.13, Si2 = 0.050, CDC Bell (to 14805, Canada), bi = 0.62, Si2 = 0.0065.

scholarly journals The Chotyniec agglomeration and its importance for interpretation of the so-called Scythian finds from south-eastern Poland

2020 ◽  
Vol 72 (2) ◽  
Author(s):  
Katarzyna Trybała-Zawiślak
Keyword(s):  
Steppe Zone ◽  
Forest Steppe ◽  
Cultural Patterns ◽  
Cultural Elements ◽  
South Eastern ◽  
Cultural Phenomenon ◽  
Long Time

Artefacts of eastern provenance, so-called Scythian ones, have been registered in Polish areas for a long time. In the western part of Polish lands, they were most often linked with Scythian invasions, and this explanation of finds was emphasized by destroyed settlements. In eastern Poland, the presence of similar artefacts, was interpreted rather in the context of contacts with the forest-steppe zone, and their almost neighbourly character was confirmed by characteristic decorations and parts of clothing. Discoveries related to the fortified settlement in Chotyniec (south-eastern Poland), together with accompanying settlements from the same time, allow for a slightly different view on the so-called Scythian finds recorded within the eastern groups of the Lusatian circle. The agglomeration should be treated as the farthest northwest enclave of the forest-steppe variant of the Scythian culture and as transmitter of certain cultural patterns. It is also a cultural phenomenon that plays a key role in the reception of the so-called eastern cultural elements.

scholarly journals Vegetation cover of riparian and coastal zones of forest swamps in the Slobozhansky National Nature Park (structural features and direction of transformation)

2019 ◽  
Keyword(s):  
Plant Communities ◽  
Vegetation Cover ◽  
Large Scale ◽  
Calluna Vulgaris ◽  
Steppe Zone ◽  
Structural Features ◽  
Forest Steppe ◽  
Coastal Zones ◽  
Gis Applications ◽  
Nature Park

This article is devoted to study the characteristics of ecological-cenotic structure and directions of vegetation cover transformations in riparian and coastal zones of forest swamps within the forest-steppe zone (north-western part of Kharkiv Oblast, Ukraine). The survey has been conducted in 2013–2018 in the territory of the Slobozhansky National Natural Park. Plant communities were surveyed both in phanerophyte and grass biotopes types, having different genesis and degree of disturbance (from terrestrial to aquatic, from native to artificially created forest plantations). A number of regionally rare plant species were identified in their composition (Dryopteris carthusiana (Vill.) H.P.Fuchs, Majanthemum bifolium (L.) F.W.Schmidt, Calluna vulgaris (L.) Hull, Equisetum sylvaticum L., Potentilla erecta (L.) Raeusch., Rubus saxatilis L., Eriophorum angustifolium Honck., E. vaginatum L., Drosera rotundifolia L., Nymphaea candida C.Presl, Utricularia vulgaris L.) and U. minor L. – a species listed in the Red Book of Ukraine. Route and stationary techniques of field surveys were used for clarification the general features of horizontal vegetation structural organization, as well as for studying the effect of environmental factors on state and stability of plant communities. Usage of mobile GIS applications in geodata collection and their further processing in ArcMap project allowed us to develop a large-scale geobotanical map (1:1500) as an area of permanent botanical survey (1.9 ha). According to the results of phytoindication, indicators of 7 environmental edaphotop regimes in 25 plant communities studied (objects of mapping and further monitoring) have been identified. Based on the geobotanical map, integration of data on the intensity of vegetation transformation have been conducted. It was found that plant communities ІV (the highest) and III degrees of transformation cover an area more than 0.6 hectares (one third of the total plot area). These communities were occurred mainly in phanerophyte-type biotopes (aspen, willow, birch, and, partly, pine), which have been affected by pyrogenic and biogenic factors. The GIS-project created as a result of the study serves as a geo-information base that can be further improved and used to solve other applied problems.

scholarly journals Оценка воздействия препаратов на основе Bacillus Subtilis и Trichoderma Viride на фитосанитарную ситуацию в посевах и продуктивность яровой пшеницы в северной лесостепи Западной Сибири

2020 ◽  
Author(s):  
С. Бурлакова ◽  
◽  
М. Егорычева ◽  
Keyword(s):  
Seed Treatment ◽  
Trichoderma Viride ◽  
Steppe Zone ◽  
Growth Conditions ◽  
Biological Properties ◽  
Growth Effect ◽  
Forest Steppe ◽  
Biochemical Processes ◽  
Chemical Treatments ◽  
High Level

The study was carried out in laboratory conditions and in the field experiment in the forest-steppe zone of Western Siberia. The protective effect of seed treatment with biofungicides Trichodermin and Sporobacterin in combination with spraying wheat crops with Fitosporin against root rot, the growth effect in the synergism of the biological properties of drugs was studied. It is shown that under the greening growth conditions of wheat, it is possible to replace the combination of chemical treatments with biological ones while maintaining a high level of productivity. The mechanism of influence of some combinations of drugs, revealing the peculiarities of biochemical processes in the cells of flag leaves of plants, on the forecast of productivity at the early stages of plant development has been revealed.

scholarly journals Syntaxonomy and ecological differentiation of the pioneer vegetation of Ukraine Classes: Isoëto-Nanojuncetea, Bidentetea

2021 ◽  
Vol 9 (3) ◽  
pp. 32-52
Author(s):  
Dmytro V. Dubyna ◽  
Tetiana P. Dziuba ◽  
Svitlana M. Iemelianova ◽  
Lyubov M. Felbaba-Klushyna
Keyword(s):  
Abiotic Factors ◽  
Steppe Zone ◽  
Water Bodies ◽  
Forest Steppe ◽  
Soil Humidity ◽  
Ecological Differentiation ◽  
Pioneer Vegetation ◽  
Phytosociological Relevés ◽  
And Cluster Analysis ◽  
High Level

Abstract The studies of the pioneer vegetation of freshwater shorelines of water bodies are of particular interest owing to the specific ecology of these habitats and the short cycle for their development in which periods of flooding and subsequent drainage alternate. Using the methods of phytosociological classification and cluster analysis based on the interpretation of 414 phytosociological relevés, the syntaxonomic structure of the pioneer vegetation of freshwater shorelines of the water bodies of Ukraine has been established that are represented by the phytosociological classes Isoëto-Nanojuncetea and Bidentetea. The class Isoëto-Nanojuncetea includes 8 associations that belong to 2 alliances and 1 order and the class Bidentetea includes 10 associations belonging to 2 alliances and 1 order. Phytocoenoses of both classes are more typical for the Polissia region and the forest-steppe zone of Ukraine, where there are favourable habitats with a flat relief, low degree of dissection and a high level of soil humidity. Using a DCA ordination analysis of associations their position in ecological space was determined. It was established that the main factors of ecological differentiation for Isoëto-Nanojuncetea habitats are soil humidity, soil aeration, nitrogen content, as well as temperature regime. Differentiation in the hyperspace of abiotic factors of the class Bidentetea occurs mainly along the gradients of soil humidity, salt regime and acidity. The ecological distribution of syntaxa of this class is also significantly influenced by the concentration of mineral nitrogen compounds in the soil.

scholarly journals Analysis of oats varieties of selection of the Omsk Agrarian Scientific Center for the assembly of protein per unit area

2020 ◽  
Vol 203 (12) ◽  
pp. 22-34
Author(s):  
P. Nikolaev ◽  
O. Yusova ◽  
Irina Safonova ◽  
Nikolay Aniskov
Keyword(s):  
Environmental Conditions ◽  
Agricultural Research ◽  
Stability Index ◽  
Steppe Zone ◽  
Breeding Value ◽  
Forest Steppe ◽  
Genotypic Effect ◽  
Double Row ◽  
Scientific Center ◽  
Selection Of

. In the Russian Federation, barley is widespread and cultivated in all soil and climate zones. The purpose of the research is to determine the adaptability of Omsk varieties of filmy and naked barley on the basis of “grain yield”. Methods. The research was conducted from 2015 to 2019 in the conditions of the southern forest-steppe of Omsk. A detailed analysis of the adaptivity parameters is given: the coefficient of the index of environmental conditions, plasticity and stability according; multiplicative coefficient according; the ecovalent of plasticity according; homeostaticity and the stability index; breeding value; genotypic effect, the rate of reaction of varieties to the environmental conditions. Final adaptability of varieties is estimated by the sum of ranks obtained each grade of the studied parameters. Results. The results of the research showed that the most adaptive in the conditions of the southern forest-steppe zone of the Omsk region are double-row filmy lines Nutans 4883, Nutans 4812 and variety Omskiy 101 (the sum of ranks = 34...38); multilayered membranous – Omskiy 99 and Nutans 4883 (sum of ranks = 54 and 56); two-row hulless hulless cultivar Omskiy golozernyy 1 (sum of ranks = 82); multi-row hulless varieties Omskiy golozernyy 2, Omskiy golozernyy 4 (sum of ranks = 86 and 84). Scientific novelty consists in the study of 8 varieties and 5 new promising lines of filmy and naked groups of barley, selection of the Omsk agricultural research center. The most adaptive varieties and lines for the conditions of the southern forest-steppe of Western Siberia are identified, which are recommended for introduction into production and for further breeding work.

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