scholarly journals Study of fouling communities succession under conditions of the device of controlled water flow

2021 ◽  
Vol 6 (1) ◽  
pp. 17-33
Author(s):  
А. Ю. Звягинцев ◽  
С. И. Масленников ◽  
А. К. Цветников ◽  
А. А. Бегун ◽  
Н. И. Григорьева
Keyword(s):  
Black Sea ◽  
Larval Settlement ◽  
The Black Sea ◽  
Bivalve Molluscs ◽  
Fouling Communities ◽  
The Caucasus ◽  
Development Cycle ◽  
The Pacific ◽  
Shell Damage ◽  
Study Species

The number of mollusc farms off the coast of Crimea and the Caucasus has increased significantly in recent years. The cultivation of the Pacific oyster Crassostrea gigas (Thunberg, 1793) requires monitoring of mollusc health and parasitological control of mariculture farms. The aim of this work was to study species composition of epibionts and endobionts, associated with shells of cultivated oyster C. gigas, as well as to identify species, damaging shells. Commercial oysters with visual shell damage were collected on a mariculture farm in the Donuzlav Bay (Crimea, the Black Sea) and brought to the laboratory alive chilled. As a result of 22 oysters’ examination, 14 macrozoobenthos species and live specimens of rock-boring mollusc Petricola lithophaga (Retzius, 1788) were found. The size of rock-borers varied 9 to 16 mm; their age was about two years. Prolonged presence of P. lithophaga inside oyster valves can cause degradation of shell calcareous layer and even death of the mollusc host; this fact is of great importance for the Black Sea mariculture. Considering P. lithophaga annual development cycle, during the period of mass larval settlement (July to October), it is recommended to inspect the shells of cultivated oysters. Further detailed studies will allow to develop measures for prevention and protection of bivalve molluscs from infestation with P. lithophaga.

scholarly journals The first record of rock-boring mollusc Petricola lithophaga (Retzius, 1788) inside the valves of oysters Crassostrea gigas (Thunberg, 1793), cultivated in Crimea (the Donuzlav Bay, the Black Sea)

2021 ◽  
Vol 6 (1) ◽  
pp. 34-40
Author(s):  
M. A. Kovalyova ◽  
O. Yu. Vyalova
Keyword(s):  
Black Sea ◽  
Crassostrea Gigas ◽  
Larval Settlement ◽  
First Record ◽  
The Black Sea ◽  
Bivalve Molluscs ◽  
The Caucasus ◽  
Development Cycle ◽  
The Pacific ◽  
Study Species

The number of mollusc farms off the coast of Crimea and the Caucasus has increased significantly in recent years. The cultivation of the Pacific oyster Crassostrea gigas (Thunberg, 1793) requires monitoring of mollusc health and parasitological control of mariculture farms. The aim of this work was to study species composition of epibionts and endobionts, associated with shells of cultivated oyster C. gigas, as well as to identify species, damaging shells. Commercial oysters with visual shell damage were collected on a mariculture farm in the Donuzlav Bay (Crimea, the Black Sea) and brought to the laboratory alive chilled. As a result of 22 oysters’ examination, 14 macrozoobenthos species and live specimens of rock-boring mollusc Petricola lithophaga (Retzius, 1788) were found. The size of rock-borers varied 9 to 16 mm; their age was about two years. Prolonged presence of P. lithophaga inside oyster valves can cause degradation of shell calcareous layer and even death of the mollusc host; this fact is of great importance for the Black Sea mariculture. Considering P. lithophaga annual development cycle, during the period of mass larval settlement (July to October), it is recommended to inspect the shells of cultivated oysters. Further detailed studies will allow to develop measures for prevention and protection of bivalve molluscs from infestation with P. lithophaga.

On the History of the Anglo-Russian Confrontation in the Western Caucasus

2021 ◽  
pp. 66-72
Author(s):  
Zalina V. Sosranova ◽  
Zalina M. Basieva
Keyword(s):  
Black Sea ◽  
Political Activity ◽  
Legal Rights ◽  
The Black Sea ◽  
Western Caucasus ◽  
The Caucasus ◽  
European Continent ◽  
North West ◽  
The Western Caucasus ◽  
Xix Century

The article examines the scale and methods of the anti-Russian military-political activity of British emissaries in the Western Caucasus in the first half of the 19th century. The scientific novelty lies in the fact that for the first time in the work the intelligence activity of British “traveling” agents in the Western Caucasus is subjected to a special study, as an independent, gaining strength way of fighting in international contradictions for the Caucasus. The relevance of the topic of the proposed article seems to us indisputable due to the incompleteness of international rivalry and the eternal Eastern question. Russian Empire in the late 20s — early 30s XIX century. took possession of all legal rights to the North-West Caucasus and outlets to the Black Sea. With its confident military successes and new territorial accessions, Russia threw a serious challenge to the European powers, and especially England, the dominant power on the European continent at that time. One of the most important tasks of England is to nullify all the achievements of Russia in Turkey and prevent its consolidation in the territory of the Western Caucasus. England, adhering to the favorite method of “raking in the heat with someone else’s hands”, and in Circassia is testing its effectiveness. Since the 30s. XIX century. Numerous British agents flooded the Caucasus, turning the Circassians against Russia. The Black Sea coast of the Caucasus has become a place of uninterrupted supply of weapons to the mountaineers. As a result of the work, the author comes to the conclusion that the sources considered in the work can represent a scientific basis for confirming the involvement of Britain in anti-Russian agitation in the Western Caucasus. The uninterrupted supply of weapons to the highlanders organized by British agents helped to maintain military tension and a fighting spirit in Circassia.

scholarly journals Level of relics in high-mountain flora of isolated Fisht-Oshten Massif and Chernomorskaya Chain

2019 ◽  
pp. 21-29
Author(s):  
I. N. Timukhin ◽  
B. S. Tuniyev
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
High Mountain ◽  
The West ◽  
The Caucasus ◽  
The Holocene ◽  
Alpine Species ◽  
High Level ◽  
First Time ◽  
Relic Species

For the first time the level of relics of the high-mountain flora of the northwestern edge of the highlands of the Caucasus has been established. The Fisht-Oshten Massif and the Black Sea Chain have a uniquely high level of relics - 51.0% (617 species), with a predominance of Tertiary-relic species - Rt - 41.2% (498 species). The second largest representation is a group of Holocene relics - Rx - 7.3% (88 species), the minimum represented Pleistocene relics - Rg - 2.5% (31 species). The relic level of alpine species is one of the highest in the Caucasus and is 52.8% (338 species). Alpine species also have predominance of Pliocene relics - 46.7% (299 species), the number of glacial relics is 2.5% (16 species), the share of xerothermic relics - 3.6% (23 species). In the preservation of relic species revealed general trends, depending on the remoteness of local flora from the main diaspora on the Fisht-Oshten Massif and the modern area of the meadow belt. These trends persist in Tertiary relics, while other patterns are observed for glacial and Holocene relics. The number of glacial relics fades to the west, most clearly it can be seen in alpine species. The number of Holocene relics as much as possible on the edge areas (Fisht-Oshten Massif and Mt. Semashkho) and minimally on the central peaks of the Black Sea Chain, where the Holocene expansion of xerophyte plants was insignificant.

scholarly journals Experiencing Europeanization in the Black Sea and South Caucasus

2021 ◽  
Author(s):  
Oliver Reisner
Keyword(s):  
Black Sea ◽  
Global Climate ◽  
The Black Sea ◽  
Governance Reform ◽  
European Studies ◽  
The South ◽  
South Caucasus ◽  
The Caucasus ◽  
Norm Diffusion ◽  
The Eu

The book series European Studies in the Caucasus offers innovative perspectives on regional studies of the Caucasus. By embracing the South Caucasus as well as Turkey and Russia, it moves away from a traditional viewpoint of European Studies that considers the countries of the region as objects of Europeanization. This second volume demonstrates this by looking into forms of inter-regionalism in the Black Sea–South Caucasus area in fields of economic cooperation, Europeanization of energy and environmental policies, discussing how the region is addressed in the elaboration of a new German Eastern Policy. In the section on norm diffusion, the contributors assess the normative power strategy of the EU and its paradoxes in the region, its impact on civil society development in Armenia, and democracy promotion in Georgia. In the section on legal approximation, issues of a global climate change regime and competition law in Georgia as well as penitentiary governance reform in the South Caucasus according to EU standards and policies are analyzed. All contributions also review regional or local contestations for the topics discussed here.

scholarly journals Landscape structure of coastal cliffs of the Black Sea coast of the Caucasus

2019 ◽  
Vol 27 (4) ◽  
pp. 298-306 ◽  
Author(s):  
Anna M. Aleynikova ◽  
Oksana N. Lipka ◽  
Marina V. Krylenko
Keyword(s):  
Black Sea ◽  
Landscape Structure ◽  
The Black Sea ◽  
The Caucasus ◽  
Vegetation Growth ◽  
Black Sea Coast ◽  
Coastal Landscapes ◽  
Coastal Cliffs ◽  
Natural Boundaries ◽  
Sea Coast

This work is devoted to the analysis of the landscape structure of the coastal cliffs of the Black Sea coast of the Caucasus. The paper analyzes the features of vegetation growth and the landscape structure of the cliffs of the Tuaphat massif, proposes and substantiates the classification of landscapes of coastal cliffs, reveals the features of coastal landscapes. In the landscape structure of the coastal cliffs of the Tuaphat massif, natural boundaries can be distinguished by: the nature of the apparent occurrence of geological layers; substates by the steepness of the slope; striae, which are characterized by more abundant growth of vegetation along cracks in the geological layer; facies usually coincide geographically with nanoand microforms of the relief and are usually represented by one type of vegetation (for example, a pillow rock form). The distribution of vegetation by striae on fine crushed stone of siltstone or mudstone, the absence of halophytes, but the predominance of salt-tolerant plant species with a wide ecological amplitude (petrophytes, cosmopolitans and ruderal) are typical.

Organic Matter of Bottom Sediments of the Crimean and Caucasian Coasts (Azov and Black Seas)

2021 ◽  
Author(s):  
E. A. Tikhonova ◽  
Keyword(s):  
Organic Matter ◽  
Black Sea ◽  
Bottom Sediments ◽  
Petroleum Hydrocarbons ◽  
Water Area ◽  
The Black Sea ◽  
Pollution Level ◽  
Sea Of Azov ◽  
The Caucasus ◽  
The Sea Of Azov

As part of the 113th cruise of the R/V “Professor Vodyanitsky”, research was conducted on organic pollution of bottom sediments in the coastal areas of Crimea and the Caucasus, as well as the water area in front of the Kerch Strait. Concentration of chloroformextractable substances was determined by the weight method and that of petroleum hydrocarbons was determined using infrared spectrometry. Both in 2020 and 2016 (the 83d cruise of the R/V “Professor Vodyanitsky”), properties of the bottom sediments of the Crimean and Caucasian coasts were typical of the marine soils of this region. This indicates that the studied water areas are generally in good condition. In accordance with the regional classification of bottom sediment pollution, the maximum concentrations of chloroform-extractable substances obtained for both the Black Sea and the Sea of Azov coast indicate pollution level III (23% of analysed samples). These values were found in bottom sediments in the Sevastopol water area (225 mg·100 g-1), in the coastal area of Cape Tarkhankut (120 mg·100 g-1) and Karadag (120 mg·100 g-1), the southern part of the Sea of Azov (125 mg·100 g-1) and Tuapse (110 mg·100 g-1). The content of chloroform-extractable substances in bottom sediments off the Black Sea coast of the Caucasus and the Sea of Azov coast is slightly lower than that off the Crimean coast. Pollution level II is assigned to bottom sediments in 46 % of the samples, with an average concentration of 72 mg·100 g-1 of air-dry solids. The rest (31 %) of the studied area was classified as conditionally clean (pollution level I, i. e. less than 50 mg·100 g-1). There has been a slight increase in the concentration of petroleum hydrocarbons in the bottom sediments of both the Black Sea and the Sea of Azov and their share in the total amount of chloroformextractable substances. In general, the level of pollution of bottom sediments by organic matter remained unchanged if compared with previous years, in particular with the data from 2016

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