December 2021
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5 Reads
Biology Bulletin
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December 2021
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5 Reads
Biology Bulletin
December 2020
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2 Reads
Biology Bulletin
November 2019
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1 Read
Povolzhskiy Journal of Ecology
January 2018
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9 Reads
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1 Citation
Зоологический журнал
The results of a 30-year long monitoring of the long-legged buzzard nesting in natural tree-shrub communities in a clay semi-desert of the Trans-Volga region are presented. In such communities, buzzards are shown to nest exclusively in crab-trees or 3-4-meter high common buckthorn growing in polydominant shrublands both in lake depressions and in large depressions on the plain. Since these plant species in plain depressions are subject to strong anthropogenic impact and fail to reach the required height, only polydominant shrubs are suitable for long-legged buzzard nesting and form sufficiently dense thickets in nesting areas. A tiny area of such communities cannot ensure the conservation of the species within the region. The maintenance of the buzzard and other bird species is currently due to the presence of artificial woods. Biodiversity in the Volga-Ural interfluve clay semi-desert primarily depends on the preservation of existing artificial woodlands, as well as on the conservation and restoration of endangered natural tree-shrub ecosystems.
January 2017
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5 Reads
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3 Citations
There were the natural shrublands and woodlands growing in ravines and depressions of salt lakes and rivers in clay semi-desert in Volga and Ural River interfluve in early 19th century. They formed the faunistic character of the region with impoverished vertebrate complex typical for ravine forests and steppe and semi-desert species nestling in the trees. Thanks to human impacts these shrubs and woods communities including the fauna had nearly extinct by the onset 20th century. The network of shrubs and woods had been planted in 1950s and the faunistic complex had started to recover. By early 21st century dendrophilous birds are only outnumbered in species richness to those of wetland complex, and triple the species number of steppe birds. However currently the 50–60 year old plantations degrade, and the destiny of forest and dendrophilous nestling birds is a challenge.
December 2016
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14 Reads
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3 Citations
Biology Bulletin
The modern situation of the vertebrate population in the clay semidesert of the interfluve of the Volga and Ural rivers differs significantly from that observed 50–60 years ago. This is due to the fact that reduction of ravine forests and steppe shrubs (which began in the 18th century) has extremely affected the forest and dendrophilous animals. The artificial afforestation, especially intense since the middle of the 20th century, provided surrogate “forest” sites in the region by the end of the 1970s. This helped to restore the missing species and raise the abundance and dispersal of forest and dendrophilous animals. By the beginning of the 21st century, afforestation had stopped in the region and the plantation areas had begun to shrink. Some trends in the populations of mammals and birds can be already noticed.
January 2016
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9 Reads
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3 Citations
Arid Ecosystems
By the end of the XX century, the ravine forests of the Volga–Ural interfluve degraded as a result of anthropogenic impact and turned into polydominant shrubberies, the area of which continues to decrease. In 2013–2014 the current state of such plant communities was studied on the northwestern coast of Lake Elton. The total area of shrubberies has already decreased by 50% because of fires, and their fire resistance declines constantly as a result of grazing.
December 2015
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7 Reads
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6 Citations
Contemporary Problems of Ecology
The current state and resilience to wildfire disturbances of the natural tamarisk (Tamarix laxa Willd) communities at on the coasts of Lake Buluchta, a salt lake, Caspian Depression (the Volga and Ural Rivers interfluve) is considered. The unique ecosystems of the natural Tamarisk communities are able to persist in specific biotopes of natural water basins only.
August 2015
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13 Reads
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3 Citations
Eurasian Soil Science
Morphological and chemical properties of soils in a soil catena crossing the eastern coast of salt Bulukhta Lake in the northern part of the Caspian region were studied. The catena included different kinds of solonetzes and solonchaks occupying the lake bottom. The morphogenetic and analytical study of the soils made it possible to judge the intensity of the major soil-forming processes on different elements of the local topography. It was shown that the intensity of humus accumulation increases from the autonomous eluvial positions towards the accumulative positions and decreases in the superaqual landscape, where the accumulation of organic matter is limited by the high soil salinity and by the washout of humified material from the shore into the lake. In the transitional and accumulative positions of the catena with saline parent materials, the upper soil horizons are subjected to desalinization owing to the additional water inflow and transformation of surface runoff into subsurface water flows along zoogenic pores. A comparative analysis of the seasonal dynamics of the level, salinity, and chemical composition of groundwater under the soils of the catena was performed. It demonstrated that the dynamics of the groundwater level and salinity in the geochemically subordinate positions depend on the hydrological regime of the lake, which, in turn, is controlled by the amount and seasonal distribution of precipitation.
April 2015
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4 Reads
Arid Ecosystems
There are preserved areas that have been minimally disturbed by erosion processes on the eastern shore of Lake Buluhta. It was shown on two profiles, which start from the bottom of the lake and extend up to the second lake terrace, that not dissected shoreline leads to poor reedbeds and not swamping of shore-land. This restricts the ability for nesting of many species. At the same time, not dissected coastline ensures the preservation of relict tamarisk thickets, which are characterized by a habitat of rare forest species of mammals and leads to migration birds flocking.
... The platy structure can be inherited from parent material [3] or resulted from different soil processes such as eluvial [4], solonetzic-eluvial [5,6], cryometamorphic [7,8], caused by anthropogenic compaction [9] or be a relict one [10]. The platy soil structure was described in soils of eastern Trans-Ural before [11] without discussing the mechanism of its formation. ...
August 2015
Eurasian Soil Science
... The small water body in the Volgograd Region is situated in a flat lowland landscape almost lacking surface and groundwater runoff (Litovskiy 2018), occupied by halophytic vegetation within the vast Caspian Lowland. It is brackish because of the big amount of halite and mirabilite in the landscape (Litovskiy 2018) and probably temporary, filling during spring and disappearing during summer in agreement with a similar pattern of the much bigger neighboring Lake Bulukhta (Shadrina et al. 2013, Litovskiy 2018. The salinity of water appears very variable from winter to summer because of snowmelt and subsequent high evaporation rate as in Lake Bulukhta where it is increasing from 19 to 200‰ (Shabanova & Lebedeva 2016). ...
October 2013
Arid Ecosystems
... Microrelief in the arid environment of the Caspian Lowland is explained by the subsurface redistribution of salts and changes in density of soils with the formation of microdepressions in areas of leaching and microhighs in the zones of evaporation and salt accumulation (Konyushkova and Abaturov, 2016), or by the zoogenic origin. The digging activity of little souslik (Spermophilus pygmaeus Pall.) may form microhighs (Shabanova et al., 2014), otherwise its vertical burrows lead to stronger wetting, desalinization, and suffusion resulted in the formation of microdepressions (Abaturov, 2010). ...
February 2014
Eurasian Soil Science
... To date, there has been only sporadic information on the digestion in the social voles (Khashaeva, 1993;Abaturov & Khashaeva, 1995). There are few studies about different aspects of nutrition of this rodent in nature (Rodionov, 1924;Voronov, 1935a, b;Formozov & Kiris, 1937;Kokhiya, 1968;Polishchuk, 1985;Larionov et al., 2011;Magomedov, 2017). One of the main features of the feeding of the social vole is that when the quality of the forage deteriorates, the digestibility of the ingested food decreases sharply (Abaturov & Khashaeva, 1995). ...
December 2011
Biology Bulletin
... The social vole (Microtus socialis Pallas, 1773) is a successful evolutionary model of trophic adaptation of herbivorous mammals in the steppe, mountain and arid territories, since it plays an important ecosystem role in these biomes, and it can also act as a pest in agrosystems (Voronov, 1935a, b;Ivanenko, 1940;Vereshchagin, 1946;Berishvili, 1968;Kokhiya, 1968;Kasatkin 2002;Bykov et al., 2008Bykov et al., , 2011. The social vole is common within some local territories in the south of Eastern Europe, the Caucasus, the Middle East and Central Asia (Pardinas et al., 2017). ...
December 2011
Biology Bulletin
... Differentiation of soils depending on the intensity of moisture redistribution in semi-deserts is typical for catenas in semi-arid landscapes. This was noted based on the physicochemical properties of soils in the middle Niger Valley (Barbiéro and Van Vliet-Lanoe, 1998), Namibia (Eitel and Eberle, 2001), the Caspian Lowland (Shabanova et al., 2010) and the Kamennaya Steppe (Khitrov et al., 2018), as well as for chemical elements partition in southern Portugal (Monteiro et al., 2012), Sierra Chica de Córdoba (Pasquini et al., 2017) and the forest-steppe landscapes of the Central Russian Upland (Semenkov et al., 2016). ...
March 2010
Eurasian Soil Science
... The social vole (Microtus socialis Pallas, 1773) is a successful evolutionary model of trophic adaptation of herbivorous mammals in the steppe, mountain and arid territories, since it plays an important ecosystem role in these biomes, and it can also act as a pest in agrosystems (Voronov, 1935a, b;Ivanenko, 1940;Vereshchagin, 1946;Berishvili, 1968;Kokhiya, 1968;Kasatkin 2002;Bykov et al., 2008Bykov et al., , 2011. The social vole is common within some local territories in the south of Eastern Europe, the Caucasus, the Middle East and Central Asia (Pardinas et al., 2017). ...
August 2008
Eurasian Soil Science