ABSTRACT: Arabian-Eurasia Collision and the Development of Alborz-Talysh-Caucasus Ranges; Petroleum System Implications for the South Caspian and Eastern Black Sea Basins

AAPG Bulletin ◽  
2001 ◽  
Vol 85 ◽  
Author(s):  
Stephen J. Vincent1, Mark B. Allen1
Keyword(s):  
Author(s):  
Ertugrul Agirbas ◽  
Ali Muzaffer Feyzioglu ◽  
Ulgen Kopuz ◽  
Carole A. Llewellyn

The phytoplankton community structure and abundance in the south-eastern Black Sea was measured from February to December 2009 using and comparing high performance liquid chromatography pigment and microscopy analyses. The phytoplankton community was characterized by diatoms, dinoflagellates and coccolithophores, as revealed by both techniques. Fucoxanthin, diadinoxanthin, peridinin and 19′-hexanoyloxyfucoxanthin were the main accessory pigments showing significant correlation with diatom-C r2 = 0.56–0.71, P < 0.05), diatom-C (r2 = 0.85–0.91, P < 0.001), dinoflagellate-C (r2 = 0.39–0.88, P < 0.05) and coccolithophore-C (r2 = 0.80–0.71, P < 0.05), respectively. Microscopy counts indicated a total of 89 species, 71% of which were dinoflagellates, 23% were diatoms and 6% other species (mainly coccolithophores). Pigment-CHEMTAX analysis also indicated the presence of pico- and nanoplankton. Phytoplankton carbon (phyto-C) concentrations were highest in the upper water column, whereas chlorophyll-a (Chl-a) showed a deep maximum. Average phyto-C was higher at the coastal station (291 ± 66 µg l−1) than at the offshore station (258 ± 35 µg l−1), not statistically different (P > 0.05). The coastal station also had higher Chl-a concentrations (0.52–3.83 µg l−1) compared to the offshore station (0.63–2.55 µg l−1), not significant (P > 0.05). Our results are consistent with other studies and indicate that the southern Black Sea is shifting towards mesotrophy with the increasing prevalence of dinoflagellates compared to diatoms.


2020 ◽  
Vol 154 ◽  
pp. 136-150 ◽  
Author(s):  
Bilal Bingölbali ◽  
Halid Jafali ◽  
Adem Akpınar ◽  
Serkan Bekiroğlu

2014 ◽  
Vol 29 (7) ◽  
pp. 675-690 ◽  
Author(s):  
VICTORIA L. CULLEN ◽  
VICTORIA C. SMITH ◽  
HELGE W. ARZ
Keyword(s):  

2019 ◽  
Vol 36 (4) ◽  
pp. 319-324
Author(s):  
İsmet Balık

The aim of this study is to estimate population parameters of pontic shad, Alosa immaculata Bennett, 1835 in the Fatsa coast of the south-eastern Black Sea. A total of 314 pontic shad specimens were collected from study area using artisanal fishing gears from March 2013 to February 2014. In the study, parameters of the von Bertalanffy growth equation were found as L∞=43.05 cm; k=0.430 per year and t0=-0.451 year. The growth performance index (Φ') was estimated as 2.90. The total mortality (Z), natural mortality (M), fishing mortality rates (F) were calculated as 1.33 year-1, 0.75 year-1 and 0.58 year-1, respectively. The annual instantaneous fishing mortality rate was greater than both the target (Fopt=0.375 year-1) and limit (Flimit=0.50 year-1) biological reference points. Similarly, the present level of exploitation rate (E=0.43) was higher than the exploitation ratio for maximum yield per recruit (Emax=0.375) suggesting that overexploitation occurred. These results showed that this species has been over-exploited in the Fatsa coast of the south-eastern Black Sea. Measures should be taken to reduce the current exploitation rate for sustainable fishing of pontic shad in the Fatsa coast of the south-eastern Black Sea.


Author(s):  
Tatia Kuljanishvili ◽  
Levan Mumladze ◽  
Bella Japoshvili ◽  
Namig Mustafayev ◽  
Shaig Ibrahimov ◽  
...  

The South Caucasus (SC) region is recognized for its high biological diversity and various endemic animal taxa. The area has experienced many fish introductions over the years, but the overall information about non-native fishes in the three SC countries, Armenia, Azerbaijan, and Georgia did not exist. Although these three countries belong to the Kura River drainage, Caspian Sea basin (only the western half of Georgia drains into the Black Sea), the legislative framework for each country regarding introduction of non-native fish species and their treatment is different and poorly developed. The goal of the present study was to make an initial inventory of non-native fish species in the three SC countries, and summarize the existing knowledge as a basis for future risk assessment models and formulation of regional management policies. Here, we present a unified list of 27 non-native species recorded in the wild in Armenia, Azerbaijan, and Georgia. Among these 27 species, eight were translocated from the Black Sea basin to the Caspian Sea basin. Out of these 27 non-native fishes, 15 species have become established (three of them being considered invasive) and six fish species could not survive in the wild.


2021 ◽  
Author(s):  
Oliver Reisner

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.


2020 ◽  
pp. 92-106
Author(s):  
A. Kudryachenko

The article analyzes the three stages of the migration of the German ethnic group into the territory of modern Ukraine, different in nature, character and orientation, and their features are clarified. The author reveals the geography of the first migratory flows of the Goths in the second half of the II century, which went from the Wisla delta to Scythia, and were divided into the western (settled on the right bank of the Dnieper) and eastern. The latter, having settled down near the Sea of Azov, founded the state of Germanarich, and in the IV century, under the pressure of the Huns, the center of life of Goths moved to the Kerch Peninsula, the mountainous region of Crimea, where their state association Gothia existed until the XVIII century. It turns out that in the early Middle Ages there was a second wave of German settlements on modern Ukrainian lands from the West European direction. The expansion of the settlements of Germans and immigrants from other European countries on the lands of Kievan Rus was facilitated by political relations, which were also realized with the help of dynastic marriage unions. The princes of Kiev, pursuing a foreign policy worthy of a great power, have equal relations with the main European states of the medieval world - the Holy Roman Empire (Germany) and Byzantium, they invite priests, German craftsmen and merchants. Starting from the XI century, small German trade colonies appeared in Kiev, Vladimir-Volynsky, Lutsk and other cities. During the Lithuanian-Polish period, the influx of German settlers to Ukrainian lands is increasing. This was facilitated by various benefits and provision of points to the German immigrants by Lithuanian princes and Polish kings. In the fourteenth and fifteenth centuries, Magdeburg law was acquired by large trading cities. The third period, the most significant resettlement and colonization, that is, large-scale development of the South of Ukraine - the Sea of Azov, the Black Sea region and the lands of Crimea - begins in the second half - the end of the 18th century. The author emphasizes that this most powerful period and the great positive history of the development of our region is largely connected with immigrants of German origin (and representatives of other ethnic groups). This period becomes a powerful colonization and economic development of the entire South of Ukraine, the rich land of the Azov, Black Sea, Crimea. It is noted that then, on the initiative and real support of the government of tsarist Russia, the development of wide steppe spaces took place, which, together with Ukrainian lands, had recently been transferred to the Russian Empire. Since then, the history of immigrants has become part of the history of the Ukrainian people. The dynamics of the development of German colonies in different provinces of the South of Russia is analyzed separately, the social aspects of the life of settlements, the grave consequences for the colonists associated with the First World War, and revolutionary events in the Russian Empire are indicated. The gains and losses in the national development, in the arrangement, in the administrative division of the German and other settlers, which were the consequences of radical fluctuations in the national policy of the Soviet government in the pre-war period, are revealed.


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