Implification of ephippium analysis (Cladocera, branchiopoda, crustacea) for reconstruction of past environmental changes in central yakutia, Russia

© SGEM2017. All Rights Reserved. The aim of our investigation is to reconstruct the local and regional palaeoenvironmental conditions and to highlight the rapid evolution of the thermokarst lake during the Holocene climate optimum. The investigated lake was located in Central Yakutia, Siberia, Russia. The investigated core was collected in a small pingo within a large Central Yakutian thermokarst Khara Bulgunnyakh basin (alas). According to ephippium analysis the formation of the lake coincided with the Holocene climatic optimum. Using cluster analysis we identified three statistically significant ecological zones that reflected changes in the species composition of sub-fossil cladoceran communities and sharp increase in concentrations of ephippia per sample. The period of optimal conditions for Cladocera that took place between 6500 and 6350 cal. yrs. BP is characterized by complex community structures and numerous resisting eggs of cladoceran remains deposited in sediments. Development of the lake ecosystem was rapid and it disappeared quite quickly

Transformations in socio-economic development of the Gulf group states

The article is devoted to the national economy transformations of the GCC States (Cooperation Council for the Arab States of the Gulf countries). This paper analyzes the dynamics of socio-economic development of the Gulf Group countries for the last 10 years, compares and systematizes the traditional and unique statistical data in order to prove the hypothesis that the positive dynamics was not only due to the high hydrocarbon prices on the global market but also to the successful structural transformation. The growth of the regional economy in the conditions of an almost threefold drop in world oil prices over the past three years is shown. We use systemic approach, comparative and statistical analysis. As the analysis of economic situation and development in the GCC countries at the current stage shows, all of them need to change the structure of the national economy and diversify it in order to reduce the dependence from mining industries, world prices fluctuations. This paper proposes a number of practical considerations and appropriate measures for the formation of more rational structure of the national economies, including the diversification of the sources of budget revenues through expanding industrialization; accelerating development of solid minerals and the creation of new industries using them. As Gulf States belong to the group of emerging countries and the structure of their national economies is similar with the Russian economy, the factors of the positive changes of the national economies will be useful for Russian and foreign researchers

Subfossil cladocera (Branchiopoda, Crustacea) in climatic and palaeoenv1ronmental investigations in eastern Siberia (Russia)

© SGEM 2016.Cladocera (Crustacea: Branchiopoda) is a key component of aquatic ecosystems. Their community structure reflects combination of physical, chemical and biological characteristics of the system they inhabit. The aim of this research is to study the taxonomic and ecological diversity of cladoceran microfossil assemblages of eastern Siberia to determine their distribution within the region with regard to environmental gradients, as well as to reveal the influence of environmental factors on structuring cladoceran communities with special regard to climate-dependant environmental parameters. We study remains of subfossil Cladocera taken from lakes and ponds located in north-eastern Siberia (Russia). Distributions of the cladoceran taxa, however, revealed substantial shifts in cladoceran communities in relation to temperature along the investigated transect. Overall, the importance of climate dependant physical and chemical factors in structuring cladoceran communities is similar to results obtained from other previously studied regions and suggests that Cladocera may be useful ecological and palaeoenvironmental indicators in the poorly studied regions of Russian Arctic

NEW “GREEN” METHOD OF BROMINATION OF (–)-NOPINONE AND (+)-CIS-VERBANONE

This work was supported by the Integrated Program of Ural Branch of RAS (project № 18-3-3-17)

CHANGES IN CLADOCERAN ASSEMBLAGES FROM A SMALL ARCTIC LAKE (NENETS AUTONOMOUS OKRUG, RUSSIA)

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Zooplankton communities of the lena river delta (Siberia, Russia)

© SGEM2016.The article represents the current status of zooplankton communities in different types of water bodies of the Lena River Delta (The Republic of Sakha (Yakutia)), Eastern Siberia, Russia. Zooplankton species compositions have been investigated in each of thermokarst and polygonal lakes of the areas of study. The diversity of zooplankton species was clearly dominated by representatives of the type of Rotifera. On the other hand, Cladocera and Copepoda species were represented approximately in equal proportions. The abundance of Rotifera was higher in zooplankton communities. The zooplankton abundance was determined by rotifers, the biomass – by Copepods. The main species complex consisted of Kellicottia longispina, Keratella cochlearis, Conochilus unicornis, Eudiaptomus graciloides, Cyclopos genera and juvenile cladocerans. The reservoirs were characterized as clean or moderately polluted and oligosaprobic with deviation in β-mezosaprobic zone. The communities were dominated by widespread zooplankton species where Holarctic and Palearctic organisms were presented approximately in equal proportions. According to biotopic distribution eurytopic species represent half of all the specific composition, planktonic and littoral species we re presented in equal proportions. Zooplankton communities in thermokar st lakes we re more similar to themselves than the thermokarst and polygonal waterbodies’ zooplankton communities. There wa s clearly seasonality in dominance of zooplankton species and their association with a type of the water body

Preliminary studies of zooplankton communities and assesment of the ecological status of lake suturuokha (Ne Siberia, Russia)

© SGEM2017. Lake Suturuokha (69'06 "N, 145'23" E) is a unique lake within the Indigirka River basin, which is located on the border of the forest-tundra and taiga in the north of the Republic of Sakha (Yakutia). Formed due to the influence of glaciers of several glaciations in the late Pleistocene, the lake has a large area (69 km 2 ) and comparatively shallow depths (2 - 2.5 m). Because of its unusual genesis and low study, the lake is of great interest to scientists. In August 2015, in the framework of the research expedition, an assessment of the current ecological conditions of Lake Suturuokha was implemented, in the course of which hydro-biological samples were selected from 16 different points located in different biotopes of the lake’s water area. According to the research conducted, Lake Suturuokha can be referred to as highly productive due to the active blooming blue-green and green algae and a mass accumulation of effipium of Daphnia middendorffiana (Fischer, 1851), Cladocera. 53 species and forms in species diversity of zooplankton community were revealed; of these, 31 were Rotifera, 12 Cladocera and 11 Copepoda. High frequency indicators belonged to the rotifers Brachionus angularis (Gosse, 1851), Collotheca pelagica (Rousselet, 1893), Kellicotia longispina (Kellicot, 1879), as well as the cladocera Daphnia middendorfiana (Fischer, 1851) and the juvenile Copepoda. 76.6 % of the total zooplankton abundance included rotifers, 21.7 % and 1.7 % of the abundance involved Copepod and Cladocera. The average value of the zooplankton abundance of the lake was 35.10 thousand ind./m 3 . Biomass of zooplankton of the lake Suturuokha on the average had a value of 295.2 mg/m 3 . 64.1 % of it were Cladocera, especially large D. middendorfiana. 36.7 % of the biomass contained Copepoda, 1.7 % - of rotifer biomass. Mass clusters of Cladocera efippia, formed primarily by D. middendorphiana, were discovered. Estimators of Shannon’s index and saprobity index defined that the lake was located on the border to pure and moderately polluted waters and had oligosaprobic level (the average values 2.57 and 1.47 accordingly). The prevalence of littoral species (44 %) and cosmopolitan species (53 %) in zooplankton was explained by the small depths of the lake. However, quantitatively, the dominant structure of zooplankton was cold-water species

Bioacustic Correction application in the psychologist’s practice

© 2016 Komarova.The relevance of the topic is justified by usage of the cutting edge technologies (instrumental approaches to correction) in the psychologist’s practice that requires high qualified professional level of psychological and pedagogical competence as well as the other skills for effective correction of psycho-emotional, speech, and cognitive functions of the patient with cerebrovascular disturbance. The objective of the paper is to develop methodical approaches and arrange the psychologist’s work employing the state-of –the-art technologies. The leading approach to the research of the topic is the modeling method that allows studying the topic as a direct and organized process of honing the professional skills. The paper structure includes the target, content, organizational and procedural, and effective components. The enhancement of the differentiated approach to speech and psychological recovery of patients with cerebrovascular disturbance by means of “Sinhro-S” bio-acoustic correction (BAC) allows rehabilitating the lost functions efficiently and boosting the experts ‘professional skills

Zooplankton communities of the lena river delta (Siberia, Russia)

© SGEM2016.The article represents the current status of zooplankton communities in different types of water bodies of the Lena River Delta (The Republic of Sakha (Yakutia)), Eastern Siberia, Russia. Zooplankton species compositions have been investigated in each of thermokarst and polygonal lakes of the areas of study. The diversity of zooplankton species was clearly dominated by representatives of the type of Rotifera. On the other hand, Cladocera and Copepoda species were represented approximately in equal proportions. The abundance of Rotifera was higher in zooplankton communities. The zooplankton abundance was determined by rotifers, the biomass – by Copepods. The main species complex consisted of Kellicottia longispina, Keratella cochlearis, Conochilus unicornis, Eudiaptomus graciloides, Cyclopos genera and juvenile cladocerans. The reservoirs were characterized as clean or moderately polluted and oligosaprobic with deviation in β-mezosaprobic zone. The communities were dominated by widespread zooplankton species where Holarctic and Palearctic organisms were presented approximately in equal proportions. According to biotopic distribution eurytopic species represent half of all the specific composition, planktonic and littoral species we re presented in equal proportions. Zooplankton communities in thermokar st lakes we re more similar to themselves than the thermokarst and polygonal waterbodies’ zooplankton communities. There wa s clearly seasonality in dominance of zooplankton species and their association with a type of the water body