Zooplankton of saline rivers in the arid zone of southern Russia (Elton Lake basin)

2013 ◽  
Vol 92 (8) ◽  
pp. 882-892
Author(s):  
V. I. Lazareva ◽  
V. A. Gusakov ◽  
T. D. Zinchenko ◽  
L. V. Golovatyuk
Keyword(s):  
Arid Zone ◽  
Lake Basin ◽  
Saline Rivers ◽  
Southern Russia

scholarly journals Biological aspects of the associations of biting midges (Diptera: Ceratopogonidae) in two saline rivers of the Elton Lake Basin, Russia

2018 ◽  
Vol 69 (6) ◽  
pp. 906 ◽  
Author(s):  
Larisa V. Golovatyuk ◽  
Tatiana D. Zinchenko ◽  
Nadezhda N. Sushchik ◽  
Galina S. Kalachova ◽  
Michail I. Gladyshev
Keyword(s):  
Organic Matter ◽  
Dry Weight ◽  
Lake Basin ◽  
Biting Midges ◽  
Nutritive Quality ◽  
Volgograd Region ◽  
Saline Rivers ◽  
The Family ◽  
Biological Aspects ◽  
First Time

We studied species composition, density, biomass and production of larvae of the family Ceratopogonidae in two saline rivers (Volgograd region, Russia). Ceratopoponids make up an important part of macroinvertebrate community in these rivers. Average monthly production (dry weight) of ceratopogonid larvae in the rivers was 3.5–4.8gm–2 month–1 in May and ~0.9gm–2 month–1 in August. For the first time, feeding spectra of ceratopogonid larvae, Palpomyia schmidti Goetghebuer, 1934, was studied using fatty acid analyses. The larvae of P. schmidti appeared to selectively consume diatoms and other algae and to avoid bacteria and decomposed dead organic matter (detritus) of low nutritive quality.

scholarly journals Quantitative Variations of ulva intestinalis Biochemical Composition Variation in the Conditions of Salty and Saltish Small Rivers of the Southern Russia

2011 ◽  
pp. 46-57
Author(s):  
Keyword(s):  
Fatty Acids ◽  
Arid Zone ◽  
Abiotic Factors ◽  
Small Rivers ◽  
Main Hypothesis ◽  
Composition Variation ◽  
Wide Range ◽  
Ulva Intestinalis ◽  
Southern Russia

Lipids and fatty acids content and composition variability of the samples of Ulva intestinalis algae collected from the Caspian Plain arid zone small rivers characterized by a wide range of abiotic factors (level of mineralization, temperature regime, saturation with oxygen, acidity of environment) variability have been studied. The role of lipids composition variability as a basis for the species ecological plasticity is being checked as a main hypothesis.

scholarly journals Use of Sorghum for Enhancing the Biodiversity and Nutritional Value of Semi-Desert Pasture Ecosystems

2019 ◽  
Author(s):  
G K Bulakhtina ◽  
A V Kudryashov ◽  
N I Kudryashova ◽  
A B Volodin ◽  
M M Shagaipov ◽  
...  
Keyword(s):  
Nutritional Value ◽  
Arid Zone ◽  
Sugar Content ◽  
Dry Mass ◽  
Mass Yield ◽  
Green Mass ◽  
Natural Pasture ◽  
Southern Russia ◽  
Green Mass Yield ◽  
Better Than

The article presents the results of studies on the adaptive potential of sorghum used for restoration of degraded pasture ecosystems, increasing their biodiversity and nutritional value. The region chosen for the experiment is a semi-desert arid part of southern Russia. The aridity coefficient is 0.11–0.30 which is typical of the arid zone. The annual volume of precipitation is 125-265 mm. Two varieties of sorghum – Travinka and Caravan – were studied. They were grown with different thickness: 10 thousand, 20 thousand and 40 thousand plants per 1 hectare. During the growing season, there was soil and atmospheric drought. The best indicators of green mass yield were recorded for Travinka for the variant “40 thousand plants per hectare – 7.9 tons per hectare, and for Caravan for the variant “20 thousand plants per hecrate – 3.9 tons per hectare. Compared with natural pasture, sorghum productivity is 18 times higher by green mass yield and 26 times higher by dry mass yield (the best options). The analysis of the chemical composition and nutritional value of sorghum showed that compared to the plants of natural pasture, sorghum is a more nutritious fodder plant. Its nutritional value is more by 0.24 feed units per 1 kg and by 1.9 % by the mass of crude protein. It is better than other plants by the content of sugar content (79 g per 1 kg) and macronutrients.

scholarly journals Algal and cyanobacterial diversity in saline rivers of the Elton Lake Basin (Russia) studied via light microscopy and next-generation sequencing

2021 ◽  
Vol 29 (1) ◽  
pp. 59-66
Author(s):  
M. E. Ignatenko ◽  
E. A. Selivanova ◽  
Y. A. Khlopko ◽  
Y. A. Khlopko ◽  
T. N. Yatsenko-Stepanova
Keyword(s):  
Next Generation Sequencing ◽  
Species Diversity ◽  
Light Microscopy ◽  
Taxonomic Structure ◽  
Lake Basin ◽  
Next Generation ◽  
Saline Rivers ◽  
Tetraselmis Cordiformis ◽  
First Time ◽  
Generation Sequencing

Naturally saline rivers are known in various regions of the world. Saline rivers with a salinity gradient from the source to the mouth are particularly interesting, because the range of salinity is the structure-forming factor of the hydrobiont assemblage. Such rivers are represented by saline rivers of the Elton Lake Basin in Volgograd region of Russia (the Bolshaya Samoroda River and the Malaya Samoroda River). Herein, we analyzed taxonomic structure and species diversity of microalgae and Cyanobacteria of the saline rivers flowing into the Elton Lake by light microscopy and next-generation sequencing. The differences and possible causes of inconsistencies in the results obtained by these methods are discussed. In total, 91 taxa of microorganisms were identified by integrated approach in the assemblages of microalgae and Cyanobacteria in the middle course of the Bolshaya Samoroda River, and 60 taxa – in the river mouth. The species diversity of those assemblages in the hypersaline Malaya Samoroda River was lower: 27 taxa from the middle course and 23 taxa from the mouth. Next-generation sequencing allowed us to refine and expand the list of microalgae taxa in the studied saline rivers due to detection of species which were hard to identify, low-abundance taxa, as well as extremely small-cell forms. Some discrepancies between the data obtained by light microscopy and next-generation sequencing indicate the advantage of simultaneous use of both methods for study of the algae communities. Such a comprehensive approach provides the most accurate and correct list of taxa added with the morphological descriptions and 18S rRNA and 16S rRNA partial sequences. Generally, 18 taxa have been recorded for the first time in the Bolshaya Samoroda River, belonging to the phyla Chlorophyta (Borodinellopsis sp., Chlorochytrium lemnae Cohn, Caespitella sp., Halochlorococcum sp., Tetraselmis cordiformis (H. J. Carter) F. Stein), Ochrophyta (Pseudocharaciopsis ovalis (Chodat) D. J. Hibberd, Characiopsis sp., Poterioochromonas stipitata Scherffel, Chrysolepidomonas sp.), Euglenozoa (Euglena bucharica I. Kisselev, Lepocinclis tripteris (Dujardin) B. Marin & Melkonian, Phacus orbicularis K. Hübner, P. parvulus G. A. Klebs), Cryptophyta (Hemiselmis cryptochromatica C. E. Lane & J. M. Archibald, Rhodomonas sp., Hanusia phi J. A. Deane), Haptophyta (Pavlova sp.), Cyanobacteria (Johanseninema constrictum (Szafer) Hasler, Dvorák & Poulícková). Seven taxa have been detected for the first time in the algal and cyanobacterial assemblages of the Malaya Samoroda River from the phyla Chlorophyta (Tetraselmis cordiformis, T. arnoldii (Proschkina-Lavrenko) R. E. Norris, Hori & Chihara, T. tetrathele (West) Butcher, Pyrobotrys elongatus Korshikov), Cryptophyta (Hanusia phi), and Cyanobacteria (Synechococcus elongatus (Nägeli) Nägeli, Oscillatoria simplicissima Gomont).

EXPERIMENTAL RESEARCH IN THE FIGHT AGAINST BRUCELLOSIS MICROBE IN ARID ARID ZONE OF SOUTHERN RUSSIA

2019 ◽  
Vol 14 (11) ◽  
pp. 1765-1776
Author(s):  
Petr Kulyasov ◽  
◽  
Tseden Tyurbeev ◽  
Valeriy Bolayev ◽  
Dzhangar Chavlinov ◽  
...  
Keyword(s):  
Experimental Research ◽  
Arid Zone ◽  
Southern Russia

scholarly journals Assessment of Natural and Forest Reclaimed Forage Lands in Semi-Desert Conditions in Southern Russia

2021 ◽  
pp. 37-48
Author(s):  
Ludmila P. Rybashlykova ◽  
◽  
Vladimir V. Lepesko ◽  
Keyword(s):  
Vegetation Cover ◽  
Field Experiments ◽  
Arid Zone ◽  
The Caspian Sea ◽  
Shrub Layer ◽  
Forest Reclamation ◽  
Southern Russia ◽  
Deep Plowing ◽  
Long Term Impact ◽  
Arrangement Increasing

Haphazard use of pastures has become one of the factors of disturbance of their natural vegetation. Therefore, forest reclamation works were carried out and significant areas of strip plantations of shrubs were created in the Caspian Sea region in the mid-20th century. In the arid zone of Russia, one of the most important tasks in the field of scientific provision of protective afforestation is the improvement of methods and techniques of arrangement, increasing longevity and environmental, agricultural, and utilitarian efficiency of plantations. This study aims to determine the long-term impact of afforestation on the functioning of pasture ecosystems. The influence of tree and shrub layer on biodiversity and productivity of vegetation cover of pastures was also studied. The research objects are plantations growing on the reclaimed pastures. The research is based on the materials of biomonitoring and field experiments using standard methods of forest inventory and geobotanical survey. Rectangular-shaped test plots of 0.25–0.30 ha were laid out for the study of forest plots. Test plots were used for a detailed description of the location, soil composition, time, method, and technology of plantation development, as well as a comprehensive assessment of the growth and longevity of tree and shrub crops. Data from key plots were used to study the successional processes of vegetation cover. The research results have shown that deep plowing preparation of soil to obtain high results in rooting, preservation, and growth of shrub species has an advantage over other soil preparation technologies in the semi-desert zone. It was found that the shrub layer up to 45 years old retains its productive and generative abilities. Pasture protection belts from Haloxylon aphyllum and reclamation and fodder plantations from Krascheninnikovia ceratoides and Calligonum aphyllum have a high cenosis potential and stability. In this case study, in semi-arid regions, afforestation with shrubs is the best way to improve and restore pastures. For citation: Rybashlykova L.P., Lepesko V.V. Assessment of Natural and Forest Reclaimed Forage Lands in Semi-Desert Conditions in Southern Russia. Lesnoy Zhurnal [Russian Forestry Journal], 2021, no. 3, pp. 37–48. DOI: 10.37482/0536-1036-2021-3-37-48

PROBLEMS CAUSED BY SMALL PIG FARM ODOR AROUND THE WESTERN SONGKHLA LAKE BASIN

2017 ◽  
Vol 2 (1) ◽  
pp. 1-13
Author(s):  
Papontee Teeraphan
Keyword(s):  
Air Pollution ◽  
Lake Basin ◽  
Urgent Problem ◽  
The Public ◽  
Pig Farms ◽  
Pig Farm ◽  
The Government ◽  
The Moment ◽  
Source Of Information ◽  
Proper Solutions

Pollution is currently a significant issue arising awareness throughout the world. In Thailand, pollution can often be seen in any part of the country. Air pollution is pointed as an urgent problem. This pollution has not damaged only to human health and lives, it has destroyed environment, and possibly leading to violence. In Phattalung, air pollution is affecting to the residents’ lives. Especially, when the residents who are mostly agriculturists have not managed the waste resulted from the farm. In Phattalung, at the moment, there are many pig farms, big and small. Some of them are only for consuming for a family, some, however, are being consumed for the business which pigs will be later purchased by big business companies. Therefore, concerning pollution, the researcher and the fund giver were keen to focus on the points of the air pollution of the small pig farms. This is because it has been said that those farms have not been aware on the pollution issue caused by the farms. Farm odor is very interesting which can probably lead to following problems. The researcher also hopes that this research can be used as a source of information by the government offices in order to be made even as a policy or a proper legal measurement. As the results, the study shows that, first, more than half of the samples had smelled the farm odor located nearby their communities, though it had not caused many offenses. Second, the majority had decided not to act or response in order to solve the odor problem, but some of them had informed the officers. The proper solutions in reducing offenses caused by pig farm odor were negotiation and mediation. Last, the majority does not perceive about the process under the Public Health Act B.E. 2535.

Stochastic simulation of the spatio-temporal field of the average daily heat index in Southern Russia

2020 ◽  
Vol 82 ◽  
pp. 149-160
Author(s):  
N Kargapolova
Keyword(s):  
Heat Waves ◽  
Numerical Models ◽  
Heat Index ◽  
Real Field ◽  
Gaussian Field ◽  
The Real ◽  
Southern Russia ◽  
Weather Stations ◽  
Spatio Temporal ◽  
Temporal Field

Numerical models of the heat index time series and spatio-temporal fields can be used for a variety of purposes, from the study of the dynamics of heat waves to projections of the influence of future climate on humans. To conduct these studies one must have efficient numerical models that successfully reproduce key features of the real weather processes. In this study, 2 numerical stochastic models of the spatio-temporal non-Gaussian field of the average daily heat index (ADHI) are considered. The field is simulated on an irregular grid determined by the location of weather stations. The first model is based on the method of the inverse distribution function. The second model is constructed using the normalization method. Real data collected at weather stations located in southern Russia are used to both determine the input parameters and to verify the proposed models. It is shown that the first model reproduces the properties of the real field of the ADHI more precisely compared to the second one, but the numerical implementation of the first model is significantly more time consuming. In the future, it is intended to transform the models presented to a numerical model of the conditional spatio-temporal field of the ADHI defined on a dense spatio-temporal grid and to use the model constructed for the stochastic forecasting of the heat index.

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