scholarly journals Potential Range of Bulbocodium versicolor (Ker-Gawl.) Spreng. (Colchicaceae, Liliopsida) in Russia

2020 ◽  
pp. 241-247
Author(s):  
A. S. Kashin ◽  
A. S. Parkhomenko ◽  
L. V. Kulikova ◽  
N. A. Petrova ◽  
I. V. Shilova ◽  
...  
Keyword(s):  
Climatic Conditions ◽  
European Russia ◽  
Potential Range ◽  
Left Bank ◽  
Occurrence Probability ◽  
Volga River ◽  
Volga Upland ◽  
Bioclimatic Model ◽  
The Right ◽  
Favorable Conditions

The article presents a bioclimatic model of the potential range of Bulbocodium versicolor in European Russia. To build the model, we analyzed a matrix containing 166 B. versicolor localities in the studied region; the analysis was carried out in the SDMtoolbox program using the climatic paramaters from the WorldClim open database. The model demonstrates that, given the available dataset on the modern climatic conditions, B. versicolor may occur in a wider geographical range comprising, at the very least, the Belgorod, Voronezh, Volgograd, Lipetsk, Penza, Rostov and Saratov provinces. Also, within European Russia, the most favorable conditions for B. versicolor are found in most of the Voronezh and Volgograd provinces as well as in some areas of the Right Bank and Left Bank of the Volga River adjacent to the Volga Upland (in the Saratov province). The maximum occurrence probability is 70–100% while the average occurrence probability is 40– 60%. The maximum contribution to the model is made by the precipitation of the warmest and most humid quarter (June–August); a smaller contribution is made by the average temperature of the coldest (December–February) and warmest (June – August) quarters as well as by the average annual precipitation. The least contribution is made by the precipitation of the most humid month (July) and the driest quarter (March–May). Finally, we conclude that bioclimatic model facilitates a better understanding of the geographical distribution of the species in question.

scholarly journals Isotope Signs (234U/238U, 2H, 18O) of Groundwater: An Investigation of the Existence of Paleo-Permafrost in European Russia (Pre-Volga Region)

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1838
Author(s):  
Evgeny Yakovlev ◽  
Igor Tokarev ◽  
Sergey Zykov ◽  
Stanislav Iglovsky ◽  
Nikolay Ivanchenko
Keyword(s):  
Isotopic Composition ◽  
European Russia ◽  
Zero Temperature ◽  
Middle Reach ◽  
Component Mixture ◽  
Volga River ◽  
The Third ◽  
The Right ◽  
Permafrost Thawing ◽  
Small Excess

The isotopic (234U/238U, 2H, 18O) and chemical composition of groundwater on the right bank of the Volga River along the middle reach (European Russia) was studied down to a depth of 400 m. These data allow diagnosis of the presence of a three-component mixture. The first component is modern/young fresh recharge water of the Holocene age. It has the isotopic composition of water δ18O → −12.9 ‰ and δ2H → −90 ‰, close to modern precipitations, and the equilibrium isotopic composition of uranium 234U/238U → 1 (by activity). The second component is slightly salted water of the late or postglacial period with δ18O → −17.0 ‰ and δ2H → −119 ‰, and a small excess of uranium-234 234U/238U ≈ 4. The third component is meltwater formed as result of permafrost thawing. It is brackish water with δ18O ≈ −15.0 ‰ and δ2H ≈ −110 ‰, and a maximum excess of uranium-234 234U/238U ≈ 15.7. The salinity of this water is associated with an increase of the SO42−, Ca2+ and Na+ content, and this may be due to the presence of gypsum in water-bearing sediments, because the solubility of sulfates increases at near-zero temperature. We explain the huge excess of uranium-234 by its accumulation in the mineral lattice during the glacial age and quick leaching after thawing of permafrost.

scholarly journals Ecological and Physiological Patterns of Selenium Migration within the Volga River Ecosystem

2019 ◽  
Author(s):  
Nikolay A Pudovkin ◽  
Denis A Pyrikov ◽  
Petr V Smutnev
Keyword(s):  
Selenium Concentration ◽  
Left Bank ◽  
Maximal Concentration ◽  
River Ecosystem ◽  
Volga River ◽  
River Bank ◽  
Bottom Soil ◽  
Migration Analysis ◽  
The Right

The article presents the results of selenium migration analysis within river ecosystem. Maximal concentration of selenium was observed near Tomakovsky and Nazarovsky ravines within Saratov territory. The concentration of this microelement at the right river bank was slightly higher than at the left bank. The concentration of selenium in bottom soil ranged from 0.062–0.099 μg/g. Maximal concentration of microelement was found in clasping-leaved pondweed. Selenium concentration in fish bodies depends on their species and nutrition. Maximal concentration of microelement was found in crucian carps, and minimal – in rudds.

scholarly journals Materials for the Characterization of the Settlement System in the Samara Volga Region in the Golden Horde Period

2021 ◽  
Vol 2 (36) ◽  
pp. 178-192
Author(s):  
Anna F. Kochkina ◽  
◽  
Dmitriy A. Stashenkov ◽  
Keyword(s):  
Volga Region ◽  
Left Bank ◽  
Volga River ◽  
Middle Volga Region ◽  
Eastern Zone ◽  
Territorial Structure ◽  
The Usa ◽  
Northern Zone ◽  
The Right

Among the sites of the Golden Horde period of the Middle Volga region, a special group consists of the sites of the Samara region, which includes the Samara Luka of the Volga and the basins of the Usa, Samara, Kinel, and Sok rivers. The analysis of the topography of the sites in the context of the natural and geographical characteristics of the area under consideration allowed us to determine its territorial structure. Based on the features of settlement placement, a zonal zoning model is proposed for the right-bank and left-bank sections of the Samara Volga region. On the territory of the righ-bank district, three microdistricts are allocated: 1) Usa microdistrict;, 2) microdistrict of the inner part of the Samara Luka; 3) microdistrict of the Syzranka River basin. In the left-bank, taking into account the modern data of the territory, six microdistricts can be distinguished. 1) Northern на trans-Volga microdistrict located in the northern zone close to the bank of the Volga River; 2) Samara-Volga microdistrict, including sites of the mouth of the Samara River, Sok, the bank of the Volga River; 3) Sok microdistrict, sites are located along the bed of the Sok and Kondurcha rivers; 4) Kinel microdistrict, sites are located along the river Bolshoi Kinel to the confluence with the Samara River; 5) Samara steppe microdistrict in the eastern zone of the region under consideration; 6) Southern trans-Volga microdistrict. Each microdistrict is characterized by a corresponding supporting framework of settlement, which is associated with the peculiarities of the functioning of sites.

scholarly journals Ecology and Biological Resources of Melliferous Plants in the Vasyugan Plain and their Importance for the Arctic Belt

2018 ◽  
Vol 7 (4.38) ◽  
pp. 235
Author(s):  
Vladimir Kashkovsky ◽  
Alevtina Plakhova ◽  
Irina Moruzi ◽  
Vladimir Tokarev ◽  
Dimitry Kropachev
Keyword(s):  
Arctic Basin ◽  
Weather Conditions ◽  
Climatic Conditions ◽  
The Arctic ◽  
Left Bank ◽  
Balanced Diet ◽  
The North ◽  
Important Means ◽  
Southern Border ◽  
The Right

Searching for mineral and energy resources in various regions of the Arctic basin has revealed the presence of huge reserves of oil, gas and other extractable resources. The coast of the Arctic Ocean, i.e. the European and the Asian north of Russia turns into the region of active economic development.Population migration flows into these regions will increase every year. People will move from the favorable climatic conditions to the extreme conditions of the Arctic. The harsh conditions of the Arctic are particularly heavy for the weather sensitive people with increased excitability of the central nervous system.In the extreme weather conditions, food is the most important means of organism protection. Therefore, a balanced diet is the most important means of human adaptation in the northern latitudes, with bee-farming products playing a huge role [4, 7].The Great Vasyugan swamp is the largest swamp with the area of 53,000 km2. It covers the Ob-and-Irtysh watershed, and stretches within 55040ʹ–58060ʹ N and 75030ʹ–83030ʹ E; its southern border stretches 573 km from the right bank of the Irtysh River to the left bank of the Ob River. From the southern border to the north, the swamp stretches for 320 km. In this area, there are huge reserves of peat, which make over 61% of the total stock in Russia. Among the swamp, there are islands, i.e. spaces not occupied by swamps and lakes, and covered with forest and grass [2].In the Tsarist times, the Vasyugan swamp was considered unsuitable for agriculture. Development of this region started after the October revolution. People grew gray cereals, fodder crops, potatoes, and vegetables. In this area, local horse breed named “narymka” was bred.After the Great Patriotic war, the Vasyugan Plain, or the Narym territory was deserted. Settlements were removed, and bushes and grass started growing in their place.Currently, the Great state program for studying the Narym territory has been started for using these areas to grow agricultural products to be supplied to the population of the Arctic Belt.  

Prince Henri d'Orleans (1867–1901): geographical and botanical exploration between inner Asia and southwest China

1978 ◽  
Vol 8 (4) ◽  
pp. 399-399
Author(s):  
WILLIAM GARDENER
Keyword(s):  
Southwest China ◽  
Western China ◽  
Left Bank ◽  
Inner Asia ◽  
Botanical Exploration ◽  
Western Yunnan ◽  
Westerly Direction ◽  
Chinese Province ◽  
The Right ◽  
North Western

Prince Henri d'Orleans, precluded by French law from serving his country in the profession of arms, had his attention turned early towards exploration. In 1889, accompanied by the experienced traveller Gabriel Bonvalet, he set out from Paris to reach Indo-China overland by way of Central Asia, Tibet and western and south western China. The journey made contributions in the problems of the whereabouts of Lap Nor and the configuration of the then unexplored northern plateau of Tibet; and in botany it produced some species new to science. The party reached Indo-China in 1890. In 1895, having organised an expedition better equipped for topographical survey and for investigations in the fields of natural history and ethnography, Prince Henri set out from Hanoi with the intention of exploring the Mekong through the Chinese province of Yunnan. After proceeding up the left bank of the Salween for a brief part of its course and then alternating between the right and left banks of the Mekong as far up as Tzeku, the party found it advisable to enter Tibet in a north westerly direction through the province of Chamdo and instead crossed the south eastern extremity of the country, the Zayul, by a difficult track which led them to the country of the Hkamti Shans in present day Upper Burma, and thence to India completing a journey of 2000 miles, "1500 of which had been previously untrodden" (Prince Henri). West of the Mekong, the journey established that the Salween, which some geographers had claimed took its rise in or near north western Yunnan, in fact rose well north in Tibet, and that, contrary to previous opinions, the principal headwater of the Irrawaddy rose no further north than latitude 28°30'. Botanical collections were confined to Yunnan, where the tracks permitted mule transport, and they produced a number of species new to science and extended the range of distribution of species already known.

Influence of meteorological factors on potato yield in the conditions of the Right-Bank Forest-steppe

2018 ◽  
Vol 1 (94) ◽  
pp. 55-61
Author(s):  
R.O. Myalkovsky
Keyword(s):  
Meteorological Factors ◽  
Weather Conditions ◽  
Climatic Conditions ◽  
Potato Yield ◽  
High Yield ◽  
Forest Steppe ◽  
Potato Tubers ◽  
Middle Aged ◽  
Lower Yield ◽  
The Right

Goal. The purpose of the research was to determine the influence of meteorological factors on potato yield in the conditions of the Right Bank Forest-steppe of Ukraine. Methods.Field, analytical and statistical. Results.It was established that among the mid-range varieties Divo stands out with a yield of 42.3 t/ha, Malin white – 39.8 t/ha, and Legend – 37.1 t/ ha. The most favourable weather and climatic conditions for the production of potato tubers were for the Divo 2011 variety with a yield of 45.9 t/ha and 2013 – 45.1 t/ha. For the Legenda variety 2016, the yield of potato tubers is 40.6 t/ha and 2017 – 43.2 t/ha. Malin White 2013 is 41.4 t/ha and 2017 42.1 t/ha. The average varieties of potatoes showed a slightly lower yield on average over the years of research. However, among the varieties is allocated Nadiyna – 40.3 t/ha, Slovyanka – 37.2 t/ ha and Vera 33.8 t/ha. Among the years, the most high-yielding for the Vera variety was 2016 with a yield of 36.6 t/ha and 2017 year – 37.8 t/ha. Varieties Slovyanka and Nadiyna 2011 and 2012 with yields of 42.6 and 44.3 t/ha and 46.5 and 45.3 t/ha, respectively. Characterizing the yield of potato tubers of medium-late varieties over the years of research, there was a decrease in this indicator compared with medium-early and middle-aged varieties. However, the high yield of the varieties of Dar is allocated – 40.0 t/ha, Alladin – 33.6 t/ha and Oxamit 31.3 t/ha. Among the years, the most favourable ones were: for Oxamit and Alladin – 2011 – 33.5 and 36.5 t/ha, and 2017 – 34.1 and 36.4 t/ha, respectively. Favourable years for harvesting varieties were 2011 and 2012 with yields of 45.7 and 45.8 t/ha. Thus, the highest yield of potato tubers on average over the years of studies of medium-early varieties of 41.2-43.3 t / ha were provided by weather conditions of 2011 and 2017 years, medium-ripe varieties 41.0-41.1 - 2012 and 2011, medium- late 37,6-38,5 t / ha - 2012 and 2011, respectively.

The Calculation of Turbulent Diffusion Coefficients in Aquatic Ecosystems

2019 ◽  
Vol 70 (11) ◽  
pp. 3903-3907
Author(s):  
Galina Marusic ◽  
Valeriu Panaitescu
Keyword(s):  
Transport Equation ◽  
Turbulent Diffusion ◽  
Diffusion Coefficients ◽  
Aquatic Ecosystems ◽  
Specific Area ◽  
Left Bank ◽  
The Right ◽  
Prut River

The paper deals with the issues related to the pollution of aquatic ecosystems. The influence of turbulence on the transport and dispersion of pollutants in the mentioned systems, as well as the calculation of the turbulent diffusion coefficients are studied. A case study on the determination of turbulent diffusion coefficients for some sectors of the Prut River is presented. A new method is proposed for the determination of the turbulent diffusion coefficients in the pollutant transport equation for specific sectors of a river, according to the associated number of P�clet, calculated for each specific area: the left bank, the right bank and the middle of the river.

scholarly journals A successful case of biological invasion: the fish Cichla piquiti, an Amazonian species introduced into the Pantanal, Brazil

2008 ◽  
Vol 68 (4) ◽  
pp. 799-805 ◽  
Author(s):  
EK. Resende ◽  
DKS. Marques ◽  
LKSG. Ferreira
Keyword(s):  
National Park ◽  
Reproductive Period ◽  
Distribution Area ◽  
Left Bank ◽  
Amazonian Fish ◽  
Paraguay River ◽  
Turbid Waters ◽  
Successful Case ◽  
The Right ◽  
Flooded Areas

The "tucunaré", Cichla piquiti, an exotic Amazonian fish has become established along the left bank of the Paraguay River in the Pantanal. It was introduced by escaping from culture ponds in the Upper Piquiri River and spread downstream, along the lateral flooded areas of that river, continuing through the clear waters of the left bank of the Paraguay River and reaching south as far as the Paraguai Mirim and Negrinho rivers. Adult spawners have been found in the region, meaning that it is a self-sustained population. Reproduction occurs in the period of low waters. They were found feeding on fishes of lentic environments belonging to the families Characidae, Cichlidae and Loricariidae. Until the end of 2004, its distribution was restricted to the left bank of the Paraguay River, but in March 2005, some specimens were found on the right bank, raising a question for the future: what will be the distribution area of the tucunaré in the Pantanal? Information about its dispersion is increasing: it is known to be in the Tuiuiú Lake, Pantanal National Park and in the Bolivian Pantanal, all of them on the right bank of the Paraguay River. The hypothesis that the "tucunaré" could not cross turbid waters, such as in the Paraguay River, was refuted by these recent findings. Possibly, the tucunaré's capacity to lay more than one batch of eggs in a reproductive period, as well as its care of eggs and young, lead them to establish themselves successfully in new environments, as has been observed in the Pantanal and other localities.

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