scholarly journals Study of floristic structure of the territory using family range in the Sok River basin (Samara Region, Zavolzhye, forest-steppe zone)

2016 ◽  
Vol 5 (1) ◽  
pp. 26-31
Author(s):  
Anastasia Viktorovna Ivanova ◽  
Natalia Viktorovna Kostina
Keyword(s):  
Steppe Zone ◽  
Research Area ◽  
Ecological Approach ◽  
Forest Steppe ◽  
Individual Sample ◽  
Elementary Unit ◽  
Number Of Species ◽  
The Family ◽  
Degree Of Similarity ◽  
Floristic Structure

Ecological approach to the study of flora implies an integral flora unit called elementary flora (EF), which is usually regarded as the elementary unit of floristic division. Identification of the minimum-range of EF is prerequisite for the research of flora of any territory. The aim of this research is to identify the number of EF in the research area (floral patterns) by comparing the values of certain parameters of the family range of flora in four minimum-ranges. The basin of the river Sok is the research area. Its landscape zoning varies in different literature sources. Florae of the four minimum-range habitats are formed on territorial basis with reference to the existing floristic descriptions. The following parameters of the family range of flora in four minimum-ranges were used: establishment of the order of the first triad of families depending on number of species in a sample, percentage of monotypic families and percentage of species in the top ten families. The considered values of florae parameters in the sample areas corresponding to the minimum-range habitats show a certain degree of similarity. The largest differences were observed in the study of the formation of top three leading families, depending on the number of species. This indicator reflects the peculiarities of individual sample areas due to the variety of intra-landscape. The authors reach a conclusion concerning the conditional affiliation of the researched territory to one EF. The conclusion is based on the analyzed parameters of the family range of flora of all minimum-ranges as well as their floristic descriptions

scholarly journals Short Communication: Proportion faunal assemblages of carnivorous mammals in geoecological districts of Mordovia, Russia

2021 ◽  
Vol 22 (10) ◽  
Author(s):  
Alexey Andreychev
Keyword(s):  
Short Communication ◽  
Steppe Zone ◽  
Forest Steppe ◽  
Natural Areas ◽  
Study Region ◽  
Faunal Assemblages ◽  
Number Of Species ◽  
The Family ◽  
Carnivorous Species ◽  
A Priority

Abstract. Andreychev A. 2021. Short Communication: Proportion faunal assemblages of carnivorous mammals in geoecological districts of Mordovia, Russia. Biodiversitas 22: 4625-4632. In the forest-steppe area, carnivorous mammals are represented by species of different faunistic assemblages. This circumstance makes the study region a priority since the species of which faunistic assemblages prevail is of interest. Fifteen carnivorous species have been identified in the territory of Mordovia. Among them, the family Mustelidae predominates in terms of the number of species. The species are found in all geoecological districts, but their distribution is uneven. The most notable species in the region are located in coniferous and broad-leaved forests (40%) and species widely distributed in several natural areas (40%). 13% of the total number of noted species belong to the taiga fauna types. The steppe type of fauna is represented by only 7% of the total number of recorded species. For each geoecological region, the fauna features are given, and a list of rare and exciting species is given. The forest-steppe zone to which Mordovia belongs is compared by the fauna of carnivorous mammals with other regions from three typical faunal assemblages.

scholarly journals The flora peculiarities of the Melekess-Stavropol physiographic region

2017 ◽  
Vol 6 (4) ◽  
pp. 47-53
Author(s):  
Anastasiya Victorovna Ivanova ◽  
Natalia Victorovna Kostina ◽  
Tatyana Mikhajlovna Lysenko ◽  
Olga Victorovna Kozlovskaya
Keyword(s):  
Steppe Zone ◽  
Forest Steppe ◽  
The Third ◽  
Number Of Species ◽  
The Family ◽  
Third Stage ◽  
Stavropol Region ◽  
Geographical Position ◽  
Accumulation Curves ◽  
Physiographic Regions

We publish the results of a three-stage study of the floristic heterogeneity of the Melekess-Stavropol physiographic region located on the territory of the Samara and Ulyanovsk Regions. The area belongs to the forest-steppe zone of the Trans Volga Lowland and occupies the area of 7,7 thousand km. Based on the analysis of family spectra, originality of the flora of the region we show the comparison of Soksky and Irgiz physiographic regions of the Samara Trans Volga. At the first stage of the research we consider the internal heterogeneity of the region, changes in the species composition of the flora along a two-sided latitudinal gradient. For this, the course of the curve, reflecting the accumulation of the number of species with an increase in area, has been studied. The accumulation curves of the number of species aligned in both directions showed three stages of an increase in the number of species, indicating the species heterogeneity of the area. The study of the position of the leading families, depending on the size and geographical position of the floristic sample, shows the heterogeneity of the studied Melekess-Stavropol region by the flora type, which is determined by the third term of the first triple of the family spectrum. At the second stage, four floral groups (floristic samples) are analyzed, which are geographically isolated at the first step. A comparison is made of the isolated groupings at the head of the family spectra using the fraction of the family in the flora and the number of species in the family. The third stage includes a comparison of the selected floral groups of the Melekess-Stavropol physio-geographical region according to the Preston index. Taking into account the existing numerical threshold of 0,27, above which the samples should be considered as different floras, it is possible to speak of the presence of four different floras on the territory of the studied area.

Spatial distribution of trees on light taiga plots before selective thinning

2015 ◽  
Vol 15 (2) ◽  
pp. 91-99 ◽  
Author(s):  
Alexander Gradel ◽  
Ochirragchaa Nadaldorj ◽  
Aleksandr A Altaev ◽  
Aleksandr A Voinkov ◽  
Enkhtuya Bazarradnaa
Keyword(s):  
Spatial Distribution ◽  
Steppe Zone ◽  
Research Area ◽  
Mountain Forest ◽  
Forest Steppe ◽  
Disturbance Regime ◽  
Forest Stands ◽  
Tree Distribution ◽  
Tree Distributions ◽  
Spatial Tree

Since 2009 the School of Agroecology and Business, Institute of Plant and Agricultural Sciences of the Mongolian University of Life Sciences in Darkhan has established research plots in two research areas in the Selenge aimag. The establishment was conducted in close cooperation with development organisations (FAO, GIZ) and the University of Goettingen. The purpose of the research initiative is to combine capacity development and monitoring of forest structure in the mountain forest steppe zone and taiga zone. Here we report results on the horizontal spatial structure of forest stands. We analysed the spatial distribution of trees on birch and larch plots of the research area «Altansumber» before a selective thinning took place on some plots in 2009. The research area is situated in the mountain forest steppe zone. The forests belong to the light taiga. The selected stands approach a chronosequence. The results showed that the tree distributions were mainly irregular («clumped»).Random spatial tree distribution occurred especially in the medium-aged birch stand. We found no indication of regular tree distributions in any of the plots. We assume that the disturbance regime and successional processes are the driving factors leading to the specific tree distribution pattern on the plots. Due to different regeneration strategies and life span of the dominating species the birch stands and the larch stands seem to differ slightly concerning the chronological occurrence of clumped and random spatial tree distribution. We finally conclude that a better control of the disturbance regime would not only support an undisturbed forest succession to riper forest stands but also result in less forest stands with irregular spatial distribution. This may also have implications on forest productivity.Mongolian Journal of Agricultural Sciences Vol.15(2) 2015; 91-99

scholarly journals Criteria for attracting plants for introduction to the steppe zone of Khakassia

2021 ◽  
pp. 33-41
Author(s):  
L. P. Kravtsova ◽  
S. A. Saaja
Keyword(s):  
Type Species ◽  
Steppe Zone ◽  
Source Material ◽  
Forest Steppe ◽  
Central Asian ◽  
The Family ◽  
Dry Conditions ◽  
Ecological Type ◽  
Continental Climate ◽  
Selection Of

Based on the research carried out in 1995-2019, the main approaches to the selection of criteria for attracting introduced species in the dry conditions of Khakassia are substantiated. The objects of research are 14 species of medicinal plants of the family Lamiaceae Lindl. different areas of origin. During the introduction, we used the method of comparing climates and generally accepted research methods. The most promising sources of source material are species that have Euro-Asian, Siberian-Central Asian, and North American ranges; by belt-zonal type - forest-steppe, mountain-steppe boreal; by ecological type - species from the group of mesoxerophytes, xeropetrophytes that have wide ecological amplitude, the requirements of which correspond to the conditions of the sharply continental climate of Khakassia.

scholarly journals Spring Ascomycetous fungi (Ascomycota) of the Nature Tract "Kholodnyi Yar"

2021 ◽  
Vol 85 (2) ◽  
pp. 37-41
Author(s):  
A. Pluzhnyk ◽  
V. Dzhagan
Keyword(s):  
Feeding Strategy ◽  
Common Species ◽  
Forest Steppe ◽  
Saprotrophic Fungi ◽  
Red Lists ◽  
Number Of Species ◽  
The Family ◽  
The Right ◽  
First Time ◽  
New Location

Information about spring ascomycetous fungi on the territory of the nature tract "Kholodnyi Yar" is presented. As the result of the study 33 species of the ascomycetous fungi were identified, 19 of which are actually spring species and 14 – found in the spring. 15 species are registered for the nature tract "Kholodnyi Yar" for the first time. The largest number of species is represented by the family Morchellaceae (5 species), as well as by the families Pezizazeae (4 species) and Sclerotiniaceae (4 species). The ecological-trophic structure is dominated by species with a saprotrophic feeding strategy, which belong to xylotrophs, humus saprotrophs and herbophilic fungi. The group of xylotrophs was the predominant group of saprotrophic fungi in terms of the number of species (10 species). Humus saprotrophs numbered 9 species of the order Pezizales. In addition, representatives of the group of herbophilic (6 species), which use last year's remnants of herbaceous plants as a substrate, were quite common. Dumontinia tuberosa was the most common species among biotrophic species which parasitizes on the rhizomes of plants of the genus Anemone and forms fruiting bodies at the same time as the flowering period of the host plant. Symbiotrophs were represented by 3 species that are also capable of the saprotrophic feeding strategy inherent to humus saprophytes. A new location for Gyromitra slonevskii, Morchella crassipes and M. steppicola – species which were listed in the third edition of the Red Book of Ukraine – has been registered. Species included in the local red lists were also identified, namely Gyromitra gigas and Verpa bohemica (Kyiv region), Helvella acetabulum (Kherson region). The finding of Phylloscypha phyllogena is the second in Ukraine and the first on the territory of the Right-Bank Forest-Steppe.

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

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.

scholarly journals Territory heterogeneity study on the «types-areas» curve for a research of its floristic structure (on the example of the Soksky physiographic area)

2018 ◽  
Vol 7 (2) ◽  
pp. 49-55
Author(s):  
Anastasiya Viktorovna Ivanova ◽  
Natalia Viktorovna Kostina ◽  
Tatyana Mikhaylovna Lysenko
Keyword(s):  
Species Composition ◽  
Curve Number ◽  
Forest Steppe ◽  
Northwestern Part ◽  
Large Area ◽  
Number Of Species ◽  
River Bed ◽  
Stavropol Region ◽  
Species Area ◽  
Floristic Structure

The Sok district is an elevated-flat forest-steppe region located in the northwestern part of Samara Region. A sufficiently large area of its territory can provide a variety of natural conditions, as a result of which there may be differences in the species composition of the flora of its parts. After the accumulation of data on the distribution of species across the territory, it is possible to study the change in species composition in different directions using the curve number of species-area. Zones of the most mass inflow of species can be considered as a different floristic region, having a different species composition. Taking into account the geographical configuration of the Sok district, the study was carried out in two directions: latitudinal (from north to south and from south to north), and also along the direction of the river bed (from the sources of the Sok River to the mouth and from the mouth to the sources). When studying the curve number of species-area in all cases, in addition to primary accumulation, there was an increase in the number of species in the middle region, and also at the end of the ascent. Accordingly, the identified heterogeneity of the species composition of the flora of the Sok district is divided into four zones. They were proposed to be considered as reference units for studying the floristic structure of the territory that is, determining the possible number of complete floras. When increasing the list with an increase in area, in addition to increasing the number of species, the position and proportion of some of the leading families were monitored. The constancy of families location should be noted: they do not change places and retain a sequence of locations. Only a share of the family in the series of floristic sampling is changing. The Sok physical-geographical district is a typical territory for the Fabaceae-zone. On its territory there is no change in the types of floras. We estimated the species specificity of the Sok physical-geographical district in relation to the Melekess-Stavropol region bordering it, located in the forest-steppe province of the Lowland Transvolga. The reference units of the flora of the two regions differ within different floras.

scholarly journals EXPERIENCE IN THE STUDY OF THE DURATION OF THE INFLUENCE OF OIL POLLUTION ON THE CHARACTERISTIC OF BIOELECTRIC RESISTANCE OF BIRCH (BETULA PENDULA ROTH)

2020 ◽  
pp. 68-74
Author(s):  
Yu. A. Kurilo ◽  
E. V. Donets ◽  
A. I. Grigoriev
Keyword(s):  
Oil Pollution ◽  
Negative Impact ◽  
Rapid Assessment ◽  
Steppe Zone ◽  
Research Area ◽  
Oil Sludge ◽  
Forest Steppe ◽  
Oil Refineries ◽  
Birch Trees ◽  
Significant Negative Impact

The study of bioelectric resistance (impedance) of woody plants by electrometric method under the influence of adverse factors, including oil sludge, is one of the adequate methodological approaches to assessing the state of forest biogeocenoses. The aim of the study is to study the peculiarities of the influ-ence of oil sludge pollution of soils on the duration of changes in the bioelectric resistance of the precam-bial tissue complex of birch trunks. The object of the study is the trees of the hanging birch (Betula pendu-la Roth.) growing in the basin of buffer ponds of JSC «Gazpromneft - ONPZ» (Omsk). The research area is the Central forest-steppe of the South of Western Siberia. The results of the studies were processed by standard methods of variational statistics, correla-tion, regression and variance one-factor analysis using the package Statistica 10. Comparisons of experience variants were carried out according to student and Fisher criteria. The dependence of elec-trical resistance of birch trunk PCT (precompiling complex tissues) on the level of oil sludge pollution of soils was studied. A recommendation for rapid assessment of the condition of birch trees in the con-ditions of oil sludge pollution by electrometric meth-od was developed. According to the results of our long-term studies, it can be noted that the duration of a significant negative impact of oil sludge on the electrical resistance precompiling complex tissues of birch trees in the forest-steppe zone of Western Sibe-ria is manifested within six years, and in the seventh year these differences are not reliable and already in the ninth year-these differences disappear (τfact > τ0.5). The results obtained can be used in screening studies of forest biogeocenoses and in the planning and or-ganization of bioreculture activities on the territory of sanitary protection zones of oil refineries and in areas of oil production and oil transportation.

scholarly journals Декоративні квіткові рослини в структурі урбофлори Лісостепу України

2016 ◽  
pp. 36-43
Author(s):  
А. Б. Марченко
Keyword(s):  
Urban Ecosystems ◽  
Steppe Zone ◽  
Life Forms ◽  
Taxonomic Composition ◽  
Environmental Indicators ◽  
Class Numbers ◽  
Forest Steppe ◽  
Floristic Diversity ◽  
Terrestrial Plants ◽  
Number Of Species

За результатами моніторингу флористичного різноманіття декоративних квіткових рослин у структурі озеленення урбоекосистем Лісостепу України уточнено їх таксономічний склад, а саме представлені 118 видами із 58 родів 31 родини 16 порядків 2 класів. Домінуюче місце займає клас Dicotyledones, який представляє 66,1 %, налічує 14 порядків, серед яких за кількістю видів переважає Asterales – 34 % видів. Клас Liliopsida представлений двома порядками, серед яких за кількістю видів переважає Asparagales Bromhead (70 %). За класифікацією І. Г. Серебрякова декоративні квіткові культури представлені наземними трав’яними (98,8 %), деревними життєвими формами (1,2 %), які в свою чергу представлені монокарпічними (71 %) та полікарпічними травами (27,8 %), кущами (1,2 %). За класифікацією X. Раункієра, декоративні квіткові культури представлені життєвими формами: терофіти (71 %), криптофіти (27,8 %),фанерофіти (1,2 %). За екологічними показниками всі наземні рослини відносно до вологи поділяються на мезофіти (52 %), ксеромезофіти (24 %), ксерофіти (21 %), мезогігрофіти (3 %); відносно до інтенсивності освітленості – геліофіти (81 %), сциофіти (19 %). According to the results of monitoring of the floristic diversity of ornamental floral plants in the structure of urban ecosystems’ greenery of Forest-Steppe zone of Ukraine we have clarified their taxonomic composition. Decorative floral plants in the structure of urban flora are presented by 118 species from 58 genera 31 families 16 orders of 2 classes. Dicotyledones class dominates in terms of quantity, representing 66,1 %, and the Liliopsida class represents 33,9 % of species. Dicotyledones class numbers 14 orders, in which Asteralesorder occupies a dominant place on the number of species (34 % of species), other orders of Saxifragales Dumort are represented by 13 %, Brassicales Bromhead – by 8,9 %, Ericales – by 7,6 %, Lamiales Bromhead, Rosales – by 6,4 %. Other orders are represented by 1–2 species. Liliopsida class is represented by two orders, among which Asparagales Bromhead dominates in terms of the number of species (70 %). According to the classification by I. G. Serebryakov, decorative floral plants are represented with herbal terrestrial plants (98,8 %), tree life forms (1,2 %), which are represented with monocarpic (71 %) and polycarpic herbs (27,8 % ), shrubs (1,2 %). According to the classification by H. Raunkiyer, decorative floral crops are represented by the following forms: therophytes (71 %), cryptophytes (27,8 %), tall aerial plants (1,2 %). According to all environmental indicators, in terms of moisture, all terrestrial plants are divided into mesophytes (52 %), xeromesophytes (24 %), xerophytes (21 %), mesohygrophytes (3 %); in terms of light intensity – heliophytes (81 %), sciophytes (19 %).

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