scholarly journals Occurrence of Acartia tonsa Dana in the Black Sea. Was it introduced from the Mediterranean?

2000 ◽  
Vol 1 (1) ◽  
pp. 105 ◽  
Author(s):  
A. GUBANOVA
Keyword(s):  
Black Sea ◽  
Seasonal Dynamics ◽  
Size Structure ◽  
World Ocean ◽  
Acartia Tonsa ◽  
The Black Sea ◽  
The World ◽  
The Mediterranean ◽  
First Time ◽  
Ship’S Ballast Water

It was reported for the first time that Acartia tonsa was present in the Black Sea as early as in 1976. A.tonsa was found in the Mediterranean Sea in 1985. So, this copepod was initially introduced to the Black Sea and did not invade here from the Mediterranean. Probably A.tonsa was transferred to the Black Sea with ship's ballast water from some other region of the World Ocean. Differences in seasonal dynamics and size structure of A.clausi and A.tonsa in the Bay of Sevastopol in 1976 are discussed.

Coastal zone dynamics - as a result of changes at the border of three environments

2021 ◽  
Author(s):  
Oleksii Batyrev ◽  
Olga Andrianova ◽  
Radomir Belevich ◽  
Michael Skipa
Keyword(s):  
Sea Level ◽  
Coastal Zone ◽  
Black Sea ◽  
World Ocean ◽  
The Black Sea ◽  
Western Coast ◽  
The World ◽  
The Mediterranean ◽  
The Impact ◽  
Coastal Land

<p>Coastal zone research is becoming increasingly important because the impact of climate change is most significant here. The state of coastal regions is determined by the variability in three contact media (geological, water, and air). Evaluation of level changes on the coasts of various parts of the World Ocean (the Mediterranean, Black, Baltic and North Seas, and the Atlantic coasts in Brazil and France) over a long period of time shows various fluctuations with an upward trend in recent decades.</p><p>To highlight the factors that determine the seashores' level fluctuations, three contact media parameters were considered on the example of the western part of the Black Sea. Calculations, analysis, and comparison of trends in the variability of hydrometeorological characteristics (air and water temperatures, precipitation, and river discharge) and sea level over a period of more than 100 years have been carried out.</p><p>To assess the intensity of fluctuations of the coastal land along the western coast of the Black Sea, the series of level heights were considered at 6 Ukrainian stations: Vylkove, Chornomorsk (Ilyichevsk), Odesa-port, port Yuzhne, Ochakiv and Sevastopol (partially used as a benchmark), at 2 stations on the Romanian coast: Constanta and Sulina, and 2 stations on the Bulgarian coast: Burgas and Varna. Estimates of the dynamics of the land for the stations of this region's coastal zone for more than a 100-year period are calculated, and it is shown in which way changes in sea level are a consequence of the processes occurring in the coastal land and at the bottom.</p><p>Comparison of the years with extreme fluctuations in the sea level with the years of the global El Niño phenomenon showed that one of the causes of the observed disturbances in the water and air environments is the distant manifestations of this phenomenon.</p><p>Level fluctuations, both in the Black Sea and in the World Ocean, are synchronous at low-frequency scales (their period is more than 5 years) since global climatic processes on our planet influence them; short-term fluctuations are distinguished by regional features and are created under the influence of local factors (tectonic, geophysical, hydrostatic, etc.).</p><p>Modeling and predicting changes in the coastal zone of various parts of the World Ocean requires continuation of systematic observations of sea-level fluctuations, hydrometeorological characteristics, and seismic conditions in regions with the longest data series; it's crucial for the Black Sea as well for the Mediterranean, Baltic, North Seas, and Atlantic shores.</p>

scholarly journals Two New Families and a New Species of Myxosporeans (Myxozoa, Myxosporea) of the Mediterranean and Black Sea Fishes

2011 ◽  
Vol 45 (6) ◽  
pp. e-48-e-52
Author(s):  
V. Yurakhno
Keyword(s):  
New Species ◽  
Black Sea ◽  
The Black Sea ◽  
The Mediterranean ◽  
First Time ◽  
One New Species ◽  
A New Species

Two New Families and a New Species of Myxosporeans (Myxozoa, Myxosporea) of the Mediterranean and Black Sea FishesDescriptions of two new families — Polysporoplasmidae fam. n. (Syn. Sphaerosporidae Davis, 1917 in Sitja-Bobadilla, Alvarez-Pellitero, 1995) and Gadimyxidae fam. n. (syn. Parvicapsulidae Schulman, 1953 in Kie et al., 2007), and one new species of myxosporeans —Gadimyxa ovalesp. n. — parasites of fishes of the Mediterranean and the Black Seas are presented. Species of the genus Gadimyxa is found for the first time in the Black Sea.

ABOUT THE WORLD OCEAN LEVEL CHANGE IN HOLOCENE AND EVOLUTION OF THE BLACK SEA COAST AND SHELF

2018 ◽  
Author(s):  
Н. Есин ◽  
N. Esin ◽  
Н. Есин ◽  
N. Esin ◽  
О. Сорокина ◽  
...  
Keyword(s):  
Black Sea ◽  
World Ocean ◽  
The Black Sea ◽  
Method Of Calculation ◽  
Level Change ◽  
Ocean Level ◽  
Black Sea Coast ◽  
The World ◽  
Method Of Extraction ◽  
World Ocean Level

A method of calculation on local curves of the World ocean eustatic (absolute) variations is presented in this paper. It is shown that vertical motions of the Earth's Crust considerably distort eustatic curve of the sea level change (up to the contrary result). Thus, the local curves present little volume of information. A method of extraction of tectonic component from local curves is proposed. The World ocean level change in Holocene is calculated on local curves of the Mediterranean Sea. It was ascertained that the process of an active erosion of the Black Sea shelf began 3–4 ka.

scholarly journals Primary production of the Black Sea: spectral approach

2016 ◽  
Vol 1 (3) ◽  
pp. 50-53 ◽  
Author(s):  
T. Y. Churilova ◽  
O. V. Kryvenko ◽  
V. V. Suslin ◽  
T. V. Efimova ◽  
N. A. Moiseeva
Keyword(s):  
Primary Production ◽  
Black Sea ◽  
Marine Ecosystem ◽  
World Ocean ◽  
The Black Sea ◽  
Spectral Approach ◽  
Production Chain ◽  
Monitoring And Forecasting ◽  
First Time ◽  
Operative Monitoring

Primary production (PP) determines productivity of marine ecosystem, that’s why accuracy of PP assessment and investigation of regularities of primary synthesis of organic matter in World Ocean remain crucial. Based on new biooptical dataset spectral model of PP of the Black Sea has been developed for the first time. The model provides correct assessment of amount of light quanta absorbed by phytoplankton pigments and efficiency of their utilization in photosynthesis, which determines accuracy of PP assessment by this approach. In perspectives PP modelling using remote sensed data gives unique opportunity for development of operative monitoring and forecasting of state primary production chain of the Black Sea foodweb.

scholarly journals Geological and structural prerequisites of gas-bearing capacity and gas hydrate formation in the World Ocean (in terms of the Black Sea)

2018 ◽  
Vol 27 (2) ◽  
pp. 294-304
Author(s):  
E. Maksymova ◽  
S. Kostrytska
Keyword(s):  
Black Sea ◽  
Gas Hydrates ◽  
Gas Hydrate ◽  
World Ocean ◽  
Ocean Floor ◽  
The Black Sea ◽  
Sea Floor ◽  
The World ◽  
Gas Hydrate Deposits ◽  
Gas Bearing

Gas hydrates occurring in the World Ocean are considered as the additional and perspective non-traditional resource of hydrocarbon materials. The proposed classification of deposits as for mining and geological conditions of their occurrence as well as methodological approach to their development and calculation of technological parameters of methane extraction from the World Ocean floor with minimum impact upon the Earth’s hydrosphere is of considerable importance in the context of current studies of new and most prospective source of energy in terms of the available experience gap as for the development of gas hydrate deposits. The approach to search for and explore gas hydrate deposits occurring on and under the World Ocean floor has been suggested; the approach is based upon the regularities of gas hydrate distribution in lithological varieties and geological structures. The necessity to take into consideration the pore space enclosing gas hydrate thicknesses to calculate their reserves has been substantiated. The overview of scientific literature sources summarizingthe results of marine expeditions as well as the analysis of publications of world scientific community dealing with the studies of gas hydrates has made it possible to determine that gas hydrate deposits are associated to the zones of jointing of continental plates and oceanic troughs. In their turn, those zones, due to different genesis, are made up of the corresponding various products of sedimentary rock accumulations. Detailed analysis of the Black Sea floor structure has been performed. Three geomorphological zones have been singled out; basic types of gas-bearing capacity manifestation and methane liberation from the interior have been represented. Quantitative evaluation of methane content in gas hydrate deposits has been given taking into account the detected ones. Data concerning gas-bearing capacity of the Black Sea floor proved by the map of mud volcanoes location within the areas of gas hydrate sampling have been considered. That was the basis to analyze peculiarities of the formation of bottom-sediment gas hydrates basing upon genetic origin of lithological composition of their enclosing rocks and their structures in terms of the Black Sea floor. Relation between the features of the World Ocean floor structure and the distribution of gas hydrate deposits has been determined. Theoretical approach to search for and explore gas hydrate deposits both in the Black Sea and in the World Ocean has been developed and proposed. Interaction between different zones of the World Ocean floor and types of gas hydrate deposits based upon the compositions of their enclosing rock has been shown. Lithological composition of the rocks enclosing gas hydrates has been analyzedin detail. That will make it possible to determine the type of any specific deposit and elaborate technological scheme to open and develop methane-containing gas hydrate deposits.

scholarly journals Penetration of Monrovia Surgeonfish Acanthurus monroviae (Perciformes: Acanthuridae) to the Black Sea

2020 ◽  
Vol 20 (8) ◽  
pp. 623-627
Author(s):  
Alexander Boltachev ◽  
Evgeniia Karpova
Keyword(s):  
Mediterranean Sea ◽  
Black Sea ◽  
Fish Species ◽  
Standard Length ◽  
The Self ◽  
The Black Sea ◽  
Single Specimen ◽  
The Past ◽  
The Mediterranean ◽  
First Time

The Monrovia Surgeonfish Acanthurus monroviae Steindachner, 1876 is reported for the first time in the Black Sea off the southwestern coast of Crimea (44°29.5ʹN; 33°35.5ʹЕ). The single specimen was caught by the commercial trap net on September 19, 2018; its standard length was 195 mm. The most realistic version of its occurrence is the self-penetration of this specimen into the Black Sea from the Mediterranean Sea. Over the past 20 years, twelve fish species that had not previously been met in the Black Sea were registered near the southwestern coast of Crimea.

Checklist of the marine fishes of Turkey

Zootaxa ◽  
2002 ◽  
Vol 113 (1) ◽  
pp. 1 ◽  
Author(s):  
MURAT BILECENOGLU ◽  
ERTAN TASKAVAK ◽  
SAVAS MATER ◽  
MURAT KAYA
Keyword(s):  
Mediterranean Sea ◽  
Black Sea ◽  
Marine Fish ◽  
Fish Fauna ◽  
Marine Fishes ◽  
The Black Sea ◽  
Sea Of Marmara ◽  
The Mediterranean ◽  
First Time

A checklist of the marine fish fauna of Turkey is presented for the first time. Examination of the previous studies revealed the presence of 448 species in 133 families. A total of 45 species, that has a doubtful presence at Turkish seas, was briefly discussed. The ichthyofaunal similarities of seas surrounding Turkey were compared, and the Black Sea and the Sea of Marmara were found to be 55.6% similar, whereas, the proportion computed for the Aegean and the Mediterranean Sea was 83.2%.

LUMINESCENCE OF THE BLACK SEA MICROSCOPIC FUNGI CULTURES

2017 ◽  
Author(s):  
Olga Mashukova ◽  
Olga Mashukova ◽  
Yuriy Tokarev ◽  
Yuriy Tokarev ◽  
Nadejda Kopytina ◽  
...  
Keyword(s):  
Fresh Water ◽  
Black Sea ◽  
Ethyl Alcohol ◽  
Light Emission ◽  
Sea Water ◽  
Control Culture ◽  
Chemical Stimulation ◽  
The Black Sea ◽  
The Given ◽  
First Time

We studied for the first time luminescence characteristics of the some micromycetes, isolated from the bottom sediments of the Black sea from the 27 m depth. Luminescence parameters were registered at laboratory complex “Svet” using mechanical and chemical stimulations. Fungi cultures of genera Acremonium, Aspergillus, Penicillium were isolated on ChDA medium which served as control. Culture of Penicillium commune gave no light emission with any kind of stimulation. Culture of Acremonium sp. has shown luminescence in the blue – green field of spectrum. Using chemical stimulation by fresh water we registered signals with luminescence energy (to 3.24 ± 0.11)•108 quantum•cm2 and duration up to 4.42 s, which 3 times exceeded analogous magnitudes in a group, stimulated by sea water (p < 0.05). Under chemical stimulation by ethyl alcohol fungi culture luminescence was not observed. Culture of Aspergillus fumigatus possessed the most expressed properties of luminescence. Stimulation by fresh water culture emission with energy of (3.35 ± 0.11)•108 quantum•cm2 and duration up to 4.96 s. Action of ethyl alcohol to culture also stimulated signals, but intensity of light emission was 3–4 times lower than under mechanical stimulation. For sure the given studies will permit not only to evaluate contribution of marine fungi into general bioluminescence of the sea, but as well to determine places of accumulation of opportunistic species in the sea.

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