scholarly journals The model of eutrophication of marine and estuarine ecosystems in the northwest Black Sea Region

Author(s):  
Yu. S. Tuchkovenko ◽  
O. A. Tuchkovenko

The paper outlines the mathematical structure of the numerical mathematical model of water eutrophication. The model is based on the numerical non-stationary hydrothermodynamic model MECCA (Model for Estuarine and Coastal Circulation Assessment) supplemented with a chemical-biological modular unit designed in accordance with the principles of preparation of the water quality model RCA-HydroQual with some modifications introduced by the author. The chemical-biological unit of the model includes a description of the dynamics of the following hydroecological variables at a local point of space: biomass of phytoplankton, mineralization-resistant organic phosphorus in suspended (detrital) and dissolved fractions, labile organic phosphorus in suspended and dissolved fractions, dissolved mineral phosphorus, stable organic nitrogen in suspended and dissolved fractions, labile organic nitrogen in suspended and dissolved fractions, ammonium and nitrate nitrogen, suspended and dissolved fractions of organic carbon resistant to biochemical oxidation, suspended and dissolved fractions of labile organic carbon and water-dissolved oxygen. The paper presents results of calibration and verification of 1D version of the model for the case of the Tyligulskiy Liman (Estuary) in the northwestern part of the Black Sea. A conclusion is drawn that the model makes it possible to display the main features of the annual dynamics of hydroecological characteristics of the liman during phytoplankton vegetation season, in particular, the conditions determining the processes of primary production and biochemical oxidation of organic substance, regeneration of mineral forms of biogenic elements. Application of the model in order to assess the impact of deepening the ‘liman-sea’ connecting canal on the hydroecological characteristics of the Tyligulskiy Liman proved that intensification of water exchange with the sea through the canal will help to reduce phytoplankton production, concentration of organic substance in the water of the liman and, ultimately, will lead to improvement of its trophic status. The model is expected to be further used to assess the effectiveness of various scenarios of managing the hydroecological regime of the limans of the north-western Black Sea region considering the changes of climatic conditions.

2021 ◽  
Vol 17 (1) ◽  
pp. 141-146
Author(s):  
Valentin-Costinel TOTIR ◽  
Roxana ALEXANDRU

Abstract: During history, the main channel of communication and cooperation between countries was through commerce and, consequently, through transport. Among all the transport ways, the maritime transport is the one that offers the best cost – benefits ratio. This article is addressed to all the people involved or interested in the economic and military fields and aims to highlight the importance of the Black Sea and North Sea connecting corridor in ensuring peace and stability in Europe in general and in South-Eastern Europe in special. To achieve this goal, we will review the historical conflicts among European countries for waterway control and make a descriptive analysis of the stability situation in the areas affected by them. Furthermore, using the hypothetical-deductive method, we will highlight the manner in which the connection of the Black Sea with the North Sea has influenced economic and military exchanges between riparian states and the impact on stability across European continent. At the end of the article, we will show how economic and military stability in south-eastern Europe is influenced and threatened by geopolitical changes in the wider Black Sea region and how this stability can be maintained and strengthened due to the great possibilities for economic cooperation among the countries of Western and South-Eastern Europe. The novelty of this approach is that it aims to analyze the importance of the Black Sea-North Sea channel in the context of fundamental changes in the politico-military situation in South-East Europe, generated by the expansion of the Russian Federation and the conflict between Turkey and Greece, NATO member countries.


Author(s):  
Sedat AYBAR

This paper examines the impact of co-operation between Turkey and  the US upon Turkish trade and investments towards the Black Sea  region. The study is particularly important in the conjuncture of the  US withdrawal from the Transatlantic Trade and Investment Partnership (TTIP) and in the wake of signing a free  trade agreement with the EU. An additional matter of importance  relates to the improved Turkey – Russia economic collaboration especially after the “jet” incident and American  involvement with the Middle East. Significant part of the latter is  economic as the US has also explicit economic interests in the  Eastern Meditteranean. A gravity model has been employed using  ordinary least squares on a panel data with fixed effects to analyse aggregate trade. We have also categorized export groups of  Turkey and the US separately. Our findings for both Turkish and the US exports indicate that per-capita GDP of Black Sea countries are  highly persistent and positively correlated with increased efficiency  gains and trade volumes. Regression results show that the US  exports to the EU member countries are on average less than to  those non-EU member Black Sea countries. Hence, we question  whether a possible co-operation between the US and Turkish  companies can help gaining better access to the Black Sea market for their exports.


2021 ◽  
Vol 1 (72) ◽  
pp. 223-235
Author(s):  
Vakhtang MAISAIA

The Black Sea region is increasingly becoming a priority on the international agenda. In fact, a regional approach is emerging as actors understand that common problems need tobe addressed jointly. Nevertheless, cooperation efforts are hampered by a number of factors, such as uneven economic and political development within and among countries, nationalist forces, and longstanding animosities between regional players. In this context, it is imperative to foster sound policies aimed at strengthening dialogue and cooperation so as to contain and ultimately resolve conflicts with peaceful means. However, there is little policy-oriented research on the challenges and opportunities for cooperation in the Black Sea region. The purpose of this paper is to assess the impact of terrorism and its dangers towards the Black Sea region. The work also describes the significance of international terrorism and its general definitions. Besides, the result and findings are based on theoretical studies and assumptions and the result of the analysis of the "Case Study" of the Black Sea region. Case study examines how the Black Sea region influences the spread of terrorism and what threats it poses for this region. Furthermore, the aspects of what makes the region important on international arena are analyzed and the existent and potential security issues are examined, as well as strategicimportance of the region for the EU and NATO is analyzed even from academic framework –“Securitization” theory322. The theory is based on security studies conceptual background and the background spectrum includes: the Copenhagen School and Critical security studies as the type323.Keywords: Black Sea region, Copenhagen School, Critical security studies, Securitization,NATO, EU, Georgia’s national security


2015 ◽  
Vol 12 (23) ◽  
pp. 39-46
Author(s):  
Burak KIZILOZ ◽  
Ketevan KUPATADZE

The article describes the project: “A Black Sea network promoting integrated natural Waste water treatment systems – WASTEnet,” which is dedicated to wastewater treatment systems. There is given a discussion of all types of Natural Treatment Systems, their specificity, chemical and biological processes which take place during their functioning. There is shown the impact of this Project and NTS on the example of ecology of Turkey and Georgia. The presented Project helps local and regional authorities and stakeholders to gain insight on the role of innovative and environmentally-friendly technologies, in improving the environment of the Black Sea region.


Author(s):  
Людмила Васильевна Бурыкина ◽  
Лариса Дмитриевна Федосеева

В статье предпринят анализ сведений о климате Северо-Западного Кавказа на базе монографии И.Н. Клингена, основанной на материалах комиссии И.С. Хатисова - А.Д. Ротиньянца и других исследователей Причерноморья и содержавшей компетентную и ценную информацию по истории сельского хозяйства шапсугов и убыхов. Несмотря на благоприятные природно-климатические условия, данная территория очень специфична, но это была естественная среда обитания адыгских племен, разработавших самобытные приемы агротехники и особые орудия труда, позволившие им возделывать землю, как на склонах гор, так и в низинах, и собирать значительные урожаи. Адыгскими племенами были выработаны собственные формы адаптации к среде обитания, представлены оригинальные способы жизнедеятельности в сложных климатических условиях, позволившие поддерживать региональную модель стабильного социально-экономического развития со своей этнокультурной спецификой. Проблема воздействия локальных природно-климатических условий на антропогенную деятельность и его отражение на процесс формирования традиции природопользования, земледельческий опыт адыгских племен, изложенный в отчете И.С. Хатисова и монографии И.Н. Клингена, не утратили актуальности и в современных условиях, поскольку сходы селевых потоков, водная эрозия с разрушительными последствиями стали настоящим бичом для хозяйств, курортов и простых граждан. Культура земледелия причерноморских адыгов была и остается самой разумной для этой территории и имеет не только научно-познавательное, но и практическое значение. The paper undertakes an attempt to analyze information about the climate of the North-West Caucasus basing on a monograph by I.N. Klingen. This monograph was based on the materials of the Commission of I.S. Khatisov-A.D. Rotinyants and other researchers of the Black Sea region. It contains competent and valuable information on the history of agriculture of the Shapsugs and Ubykhs. Despite favorable natural and climatic conditions, this territory is very specific. In this natural habitat, the Adyghe tribes developed original techniques of agricultural machinery and special tools that allowed them to cultivate land both on the slopes of the mountains and in the lowlands, and take significant crops. The Adyghe tribes developed their own forms of adaptation to the habitat, presented original ways of living in difficult climatic conditions, which made it possible to maintain a regional model of stable socio-economic development with its ethnocultural specificity. The problem of the impact of local natural and climatic conditions on anthropogenic activity and its reflection on the process of forming the tradition of nature management, the agricultural experience of the Adyghe tribes, set out in the report of I.S. Khatisov and the monograph by I.N. Klingen, have not lost their relevance in modern conditions. Rural mudflows, water erosion with destructive consequences have become a real scourge for farms, resorts and simple citizens. The culture of agriculture of the Adyghes living in the Black Sea region was and remains the most reasonable for this territory and has not only scientific and cognitive, but also practical significance.


2020 ◽  
Vol 4 (4) ◽  
pp. 151-159
Author(s):  
Adisa Đonlagić ◽  
Bogdan A. Moskalenko

The article summarizes the arguments within the scientific challenge on improving approaches to estimate the environmental impact of FDI inflow on the economy. The main objective of the research is to systematize the existing statistical approaches to analyze whether and how the macroeconomic determinants could impact the environment in terms of greenhouse gas emissions. Systematization of theoretical and methodological materials on solving the problem of choice of applying more or less stringent environmental regulations with addition to more efficient industrial technologies which are supposed to have a positive impact on the environment. The relevance of solving this problem is that inceptive of FDI inflow could provide the economy with resources that reduce pollution, create better conditions for workers and local citizens. On the other hand, FDI is not interested in investing in economies with strict environmental legislation. The methodical tools of the research are carried out in the following logical sequence: the systematization of existing statistical methods panel data analysis; analysis of data that will be used in the estimation model and in further country environmental policymaking process; application of fixed and random effects models in estimation of the environmental impact of FDI on analyzed data. The research methods combine in the following dimensions: comparative analysis, regression analysis. The period from 1999 to 2018 was chosen as the research period. The objects of the research are foreign direct investment net inflows into the Baltic-Black Sea region countries` economies and their impact on its environment. The article presents the results of empirical analysis, which showed that FDI inflow has an impact on the environment, but it is severely limited by other more significant determinants. The pollution haven hypothesis in the Baltic-Black Sea trans-national region countries policy in attraction FDI has not been proved considering more strict high-standard environmental legislation in EU countries alongside with increase in GHG emission per capita. The results of the research can be useful within government policy-making processes considering the aim to incentivize FDI inflow. Keywords: country investment potential, environment, foreign direct investment, greenhouse gas emission, national economy.


Author(s):  
Ioan-Cătălin Murărașu

Even if in Europe the costs of the transition to a green economy are reflected in the final consumer’s bills and in the prices of finished products - an effect already felt in the Community - the necessity to clean up the economy cannot be disputed. However, Europeans need to determine if the priority is to give up conventional energy or to develop the green energy production, because it is becoming increasingly clear that the two objectives cannot be achieved simultaneously without affecting the purchasing power of Europeans. Within this context, the study involves: a) the statistical analysis of the impact of the conventional energy overtaxation and the renewable energy subsidization on the average price charged by suppliers for final consumers on the Romanian market in the first three quarters of 2021 and b) to identify the correlation coefficient between the spot price for energy on the Romanian market and the share of renewable energy in the national mix for the same period. The objective of the research is to assess the costs paid by the final consumers within the context of the energy transition and the production capacity of renewable sources that must be added to the National Energy System for their amortization. The results show the importance of the Black Sea basin in the regional energy equation and its potential to become a point of attraction for European energy investments.


2013 ◽  
Vol 7 (12) ◽  
pp. 960-965 ◽  
Author(s):  
Guner Karatekin ◽  
Mehmet Kilinc ◽  
Banu Gulcan Oksuz ◽  
Mahir Igde

Introduction: This study aimed to determine the seroprevalence of hepatitis B virus (HBV) infection in children and females in the middle Black Sea Region of Turkey and to assess the impact of the universal infant hepatitis B vaccination program started in 1998. Methodology: The laboratory records of 12,057 patients who attended the Samsun Maternity and Children’s Hospital between January 2007 and November 2009 were evaluated retrospectively. In this period, hepatitis B surface antigen (HBsAg), the antibody to hepatitis B surface antigen (anti-HBs), was studied from serum samples using the enzyme linked immunosorbent assay method. Results: In the total population, HBsAg seropositivity was found to be 3.8% (456/12010); anti-HBs was 32.6% (3526/10800). HBsAg was 3.5%, in the 0-14 year age group, 8.2% in the 15-18 group, 3.3% in the 19-49 group, and 8.0% in the over 49 group. The seropositivity of HBsAg decreased by half in patients between zero and 14 years of age (4.2%) who were included in the universal vaccination program when compared with those in the 15-18 year group (8.2%) who were not included in the program. There was a significant difference in HBsAg seropositivity between boys (5.8%) and girls (3.9%) (p < 0.05). Conclusions: According to the hepatitis B seroprevalence records of our region, HBsAg was 3.5% in the 0-14 year age group, 8.2% in the 15-18 year group. It may therefore be suggested that, since 1998, the vaccination program in our region has been successful.


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