MORPHOLOGICAL STRUCTURE OF LIVER AND PANCREAS OF GAME FISH OF THE BLACK SEA

2017 ◽  
Vol 59 (2) ◽  
pp. 040-047
Author(s):  
Oleg A. Ledenev ◽  
◽  
Olga V. Lozhnichenko ◽  
Keyword(s):  
Black Sea ◽  
Morphological Structure ◽  
The Black Sea ◽  
Liver And Pancreas ◽  
Game Fish

scholarly journals Seasonal dynamics and spatial distribution of structural indicators of the bacterioplankton community of the Sevastopol Bay (the Black Sea)

2021 ◽  
Vol 6 (1) ◽  
pp. 82-101
Author(s):  
O. A. Rylkova ◽  
I. G. Polikarpov
Keyword(s):  
Black Sea ◽  
Aquatic Ecosystems ◽  
World Ocean ◽  
Morphological Structure ◽  
The State ◽  
The Black Sea ◽  
Bacterioplankton Community ◽  
Biological Variables ◽  
Sevastopol Bay ◽  
Structural Indicators

Bacterioplankton community determines formation of a significant part of the secondary production and mineralization of organic matter in aquatic ecosystems, as well as responds quickly to any changes in the environment. Data on the state of the microbial community are required for understanding the processes of substance and energy flow transfer in aquatic ecosystems; this is especially important for coastal waters, where significant negative transformations have occurred in recent decades. The aim of this study was to investigate and analyze changes in structural indicators of the bacterioplankton community in different areas of the Sevastopol Bay (the Black Sea) during 1992–2005. Bacterial abundance was determined by direct microscopy, using adsorption (erythrosine) or fluorescent (acridine orange) stains; biomass was calculated using a conversion factor (2·10−14 g C·cell−1) or by direct cell measurements. Cell morphotypes were determined by scanning electron microscopy. The total abundance of microorganisms varied 0.2·106 to 10·106 cells·mL−1; biomass – 2 to 201 mg C·m−3. In the morphological structure of bacterioplankton community, cocci (0.36–0.86 μm in diameter) with a volume of 0.02–0.27 μm³ and rod-shaped cells (0.6–1.2 μm length; 0.2–0.4 μm width) with a volume of 0.50–0.65 μm³ prevailed. Maximum values of the bacterioplankton abundance, biomass, and cell size in the Sevastopol Bay were registered in summer and autumn (June to October), while minimum values were recorded in winter and spring. The observed values of bacterioplankton quantitative indicators were comparable with the values for various coastal water areas of the World Ocean, inter alia the Black Sea. The dynamics of bacterioplankton structural indicators of the Sevastopol Bay during the annual cycle was determined by abiotic and biotic environmental factors. High correlation (86 %, p < 0.01) between the hydrological, hydrochemical, and biological variables confirms the non-random nature of the relationship between them. The discriminant analysis revealed significant differences in the structure of bacterioplankton communities for the bay areas with different intensity of water exchange, degree of general pollution, and distance from the open sea. Significantly smaller bacterial cell volume in 2004 [(0.16 ± 0.05) μm³] compared with that of 2005 [(0.20 ± 0.03) μm³] (paired t-test, p < 0.05) was probably related to intense microorganisms’ grazing by phagotrophic protozoa. The obtained data on the structure of the bacterioplankton community can be used for forecasting the state of the Sevastopol Bay ecosystem, as well as for developing and verifying mathematical models of coastal ecosystems functioning.

MAPPING OF VARIATIONS IN THE ANAPA BAY BAR LANDSCAPE-MORPHOLOGIC STRUCTURE WITH HIGH-RESOLUTION SATELLITE IMAGES

2017 ◽  
Author(s):  
Valentina Kravtsova ◽  
Valentina Kravtsova ◽  
Ekaterina Chalova ◽  
Ekaterina Chalova ◽  
Vayacheslav Krylenko ◽  
...  
Keyword(s):  
High Resolution ◽  
Black Sea ◽  
Wind Direction ◽  
Anthropogenic Impact ◽  
Satellite Images ◽  
Morphological Structure ◽  
The Black Sea ◽  
Anthropogenic Influence ◽  
High Resolution Satellite Images ◽  
High Resolution Images

The Anapa bay bar is at present one of only a few sand beaches in the Black Sea coastal zone of Russia. The bay bar includes three main belts – beach, dune belt and hillocky sands. A strong anthropogenic impact is observed: the landscape-morphological structure of the dune belt is disturbed, so monitoring of the bay bar is essential . For this purpose we had compiled a series of maps of landscape-morphological structure for the Blagoveschensk and Vityazevo-Anapa parts of the bay bar using high-resolution images from WorldView-2 satellite. Interpretation of stereo-pairs of multitemporal images was carried out at the scale of 1:2000, while a series of maps was compiled at the scale of 1:5000. Twelve sites with different landscape-morphologic structure are covered by these maps and characterized. The structure depends on geomorphologic neighborhood (adjacency to the cliff or to the lagoon) and aspect to wind direction, but mainly on the degree of anthropogenic influence. So the dune belt has been formed at the beach in some areas, but in other areas the dune belt is located behind the beach, or sometimes has disappeared. The compiled maps clearly reflect these variations and show their mainly anthropogenic origin. These maps will help to investigate adaptive solutions for Anapa bay bar conservation and protection.

MAPPING OF VARIATIONS IN THE ANAPA BAY BAR LANDSCAPE-MORPHOLOGIC STRUCTURE WITH HIGH-RESOLUTION SATELLITE IMAGES

2017 ◽  
Author(s):  
Valentina Kravtsova ◽  
Valentina Kravtsova ◽  
Ekaterina Chalova ◽  
Ekaterina Chalova ◽  
Vayacheslav Krylenko ◽  
...  
Keyword(s):  
High Resolution ◽  
Black Sea ◽  
Wind Direction ◽  
Anthropogenic Impact ◽  
Satellite Images ◽  
Morphological Structure ◽  
The Black Sea ◽  
Anthropogenic Influence ◽  
High Resolution Satellite Images ◽  
High Resolution Images

The Anapa bay bar is at present one of only a few sand beaches in the Black Sea coastal zone of Russia. The bay bar includes three main belts – beach, dune belt and hillocky sands. A strong anthropogenic impact is observed: the landscape-morphological structure of the dune belt is disturbed, so monitoring of the bay bar is essential . For this purpose we had compiled a series of maps of landscape-morphological structure for the Blagoveschensk and Vityazevo-Anapa parts of the bay bar using high-resolution images from WorldView-2 satellite. Interpretation of stereo-pairs of multitemporal images was carried out at the scale of 1:2000, while a series of maps was compiled at the scale of 1:5000. Twelve sites with different landscape-morphologic structure are covered by these maps and characterized. The structure depends on geomorphologic neighborhood (adjacency to the cliff or to the lagoon) and aspect to wind direction, but mainly on the degree of anthropogenic influence. So the dune belt has been formed at the beach in some areas, but in other areas the dune belt is located behind the beach, or sometimes has disappeared. The compiled maps clearly reflect these variations and show their mainly anthropogenic origin. These maps will help to investigate adaptive solutions for Anapa bay bar conservation and protection.

Nomads and Natives beyond the Danube and the Black Sea

2019 ◽  
Author(s):  
Sergiu Musteata
Keyword(s):  
Black Sea ◽  
The Black Sea

The Black Sea and the Early Civilizations of Europe, the Near East and Asia

2013 ◽  
Author(s):  
Mariya Ivanova
Keyword(s):  
Black Sea ◽  
Near East ◽  
The Black Sea

Ice upon the Coast of the Black Sea

1900 ◽  
Vol 49 (1260supp) ◽  
pp. 20198-20198
Keyword(s):  
Black Sea ◽  
The Black Sea

MÖSSBAUER AND CHEMICAL ANALYSES OF SOME SEDIMENTS FROM THE ROMANIAN SHORE OF THE BLACK SEA

1979 ◽  
Vol 40 (C2) ◽  
pp. C2-445-C2-448
Author(s):  
D. Barb ◽  
L. Diamandescu ◽  
M. Morariu ◽  
I. I. Georgescu
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Chemical Analyses

Modeling of ecological conditions in the Euxine Basin in the Sarmatian and Maeotian by methods of diatom analysis

2019 ◽  
pp. 257-261
Author(s):  
Eleonora P. Radionova
Keyword(s):  
Black Sea ◽  
Late Miocene ◽  
The Black Sea ◽  
Subtidal Zone ◽  
Diatom Analysis ◽  
Diatom Flora ◽  
North West ◽  
Ecological Conditions ◽  
The North

The associations and ecological conditions of the existence of modern diatoms of the North-West (Pridneprovsky), Prikerchensky and Eastern regions of the subtidal zone of the Black Sea are considered. Based on the unity of the composition of the Present and Sarmatian-Meotian diatom flora, an attempt has been made to model some of the ecological c situation of the Late Miocene Euxinian basin.

Subsatellite observations of the fundamental bio-optical parameters of the Black Sea (new approach)

2002 ◽  
Vol 8 (2-3) ◽  
pp. 231-238
Author(s):  
G.K. Korotaev ◽  
◽  
M.E. Li ◽  
G.A. Tolkachenko ◽  
◽  
...  
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Optical Parameters ◽  
New Approach
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