Comparative Analysis of Prestorm Situations in the Florida Strait and Golubaya Bay in the Black Sea

2015 ◽  
pp. 161-171
Author(s):  
Alexander G. Grankov ◽  
Alexander A. Milshin
Keyword(s):  
Comparative Analysis ◽  
Black Sea ◽  
The Black Sea

scholarly journals Taxonomic status of Flexopecten glaber ponticus (Bucquoy, Dautzenberg & Dollfus, 1889) – the Black Sea Flexopecten glaber (Linnaeus, 1758) (Bivalvia: Pectinidae)

2018 ◽  
Vol 3 (4) ◽  
pp. 14-28 ◽  
Author(s):  
I. P. Bondarev
Keyword(s):  
Comparative Analysis ◽  
Black Sea ◽  
Taxonomic Status ◽  
Morphological Data ◽  
Valid Species ◽  
The Black Sea ◽  
Marmara Sea ◽  
History Of ◽  
The Mediterranean ◽  
The Republic

The name Flexopecten glaber ponticus (Bucquoy, Dautzenberg & Dollfus, 1889) is generally used for the only Pectinidae representative inhabiting the Black Sea. It is registered in the Red Book of the Republic of Crimea as endemic subspecies reducing in amount. F. glaber ponticus is listed in WoRMS MolluscaBase as the only accepted subspecies of Flexopecten glaber (Linnaeus, 1758). In the past its taxonomic status has been changed from a geographic variety to valid species. The purpose of this study is to establish its correct taxonomic status. The study is based on a comparative analysis of conchological features of Flexopecten glaber and F. glaber ponticus in relation with the brief natural history of population in the Black Sea. Sampling was performed by snorkel equipment in Kazach’ya Bay (Black Sea, Crimea, Sevastopol) at 2–6 m depths. A total of 100 scallop specimens were sampled in September 2017. To assure a better understanding in a broader context those results are compared with the previously published morphological data based on the analysis of a large amount of material from the Black Sea and the Mediterranean Sea – Marmara Sea regions. Comparative analysis of conchological features of F. glaber ponticus from the Black Sea with F. glaber from the Mediterranean region has not revealed any distinct differences between them. Thus, there are no evidenced data for the diagnosis of F. glaber ponticus as a subspecies. Species F. glaber appeared in the Black Sea not earlier than 7,000 years ago and formed a well developed population less than 3,000 years ago. We have to conclude that the specified divergence period is not long enough to form a subspecies. As a result of the present survey the subspecific status of F. glaber ponticus is not retained and the name is placed in synonymy of the parent species Flexopecten glaber.

MARINE MAMMALS IN NAVAL OPERATIONS

2021 ◽  
Vol 17 (1) ◽  
pp. 134-140
Author(s):  
Ioan MOLDOVAN ◽  
Dan Marian UNGUREANU
Keyword(s):  
Comparative Analysis ◽  
Present Article ◽  
Black Sea ◽  
Marine Mammals ◽  
The Black Sea ◽  
Historical Aspects ◽  
Naval Operations

Abstract: This paper aims to provide an overview how to employ marine mammals in naval operations and also to identify possibilities of involving mammals in support of the Romanian Naval Forces. The article uses domain observation and comparative analysis of how to employ marine mammals in the actions of modern fleets. For this purpose, we set out to identify the possibilities of using mammals for military scopes. Also, we will provide historical aspects of involving mammals in military activities in the Black Sea. In addition, we will offer relevant implications and perspectives regarding the use of marine mammals by the Romanian Naval Forces. The novelty of this article comes from the motivation to bring to the attention of Romanian Naval Forces the approach of employing mammals and developing research in the underwater domain based on training marine mammals. The present article is addressed especially to the master students and the personnel of the Naval Forces, and also to those who contribute to the implementation of feasible ideas at the level of the Romanian Naval Forces and intend to develop the underwater domain in order to discourage actions of a potential adversary

Comparative analysis of heavy metal and radionuclide contaminants in Black Sea green and red macroalgae

2005 ◽  
Vol 51 (11) ◽  
pp. 1-8 ◽  
Author(s):  
A.S. Strezov ◽  
Tz.P. Nonova
Keyword(s):  
Heavy Metal ◽  
Comparative Analysis ◽  
Black Sea ◽  
Coastal Region ◽  
Absorption Spectrometry ◽  
The Black Sea ◽  
Sampling Location ◽  
Metal Concentrations ◽  
Red Macroalgae ◽  
Black Sea Coast

A comparative analysis about the accumulation of heavy metal, natural and technogenic radionuclides from the Black Sea environment in different Bulgarian coastline regions is made. The possibilities to use Chlorophyta and Rhodophyta algae phylums as bioindicators in marine environment are investigated. Environmental contamination in the Black Sea alga species (green and red) was studied from 1992 to 2003. Sampling sites were selected to cover the whole coastal region. Low level gamma spectrometry was used to determine the natural and technogenic nuclide concentrations. The heavy metal concentrations were measured by Atomic Absorption Spectrometry (AAS). The obtained data show that radionuclide and metal concentrations depend on the macrophyte type. Tendencies in the concentration of pollutant variations during the studied period are examined and all data give information about different macrophytic species' ability to accumulate certain elements from one and the same sampling location. All obtained results show that use of macroalgae in marine environmental monitoring reduces the need for complex studies on chemical speciation of aquatic contaminants and makes algae valuable indicators for seawater quality assessment. All data show the lack of serious pollution along the Bulgarian Black Sea coast.

scholarly journals Prediction of the Atmospheric Dustiness over the Black Sea Region Using the WRF-Chem Model

Fluids ◽  
2021 ◽  
Vol 6 (6) ◽  
pp. 201
Author(s):  
Anna Papkova ◽  
Stanislav Papkov ◽  
Dmitrii Shukalo
Keyword(s):  
Machine Learning ◽  
Comparative Analysis ◽  
Black Sea ◽  
External Factors ◽  
Machine Learning Techniques ◽  
The Black Sea ◽  
Black Sea Region ◽  
Actual Result ◽  
Learning Techniques ◽  
Dust Events

To make a reliable forecast for the level of dust, many external factors such as the wind energy and the soil content in the moisture must be considered. The numerical prediction of the Black sea region’s content of dust is the focus of this study, and for this purpose, the WRF-Chem model is used. The investigation is based on the statistics of the prediction coincidence and the actual result extracted from the data of the backward trajectories of AERONET and aerosol stratification maps in the atmosphere constructed with the help of the CALIPSO satellite. A comprehensive set of data was collected, and a comparative analysis of the results was carried out using machine learning techniques. The investigation identified 89% hits in the prediction of dust events, which is a very satisfactory result.

Thermal structure of the crust in the Black Sea: comparative analysis of magnetic and heat flow data

2014 ◽  
Vol 35 (4) ◽  
pp. 345-359 ◽  
Author(s):  
V. I. Starostenko ◽  
M. N. Dolmaz ◽  
R. I. Kutas ◽  
O. M. Rusakov ◽  
E. Oksum ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Heat Flow ◽  
Black Sea ◽  
Thermal Structure ◽  
The Black Sea ◽  
Flow Data

Contamination of sediments in Varna Lake and Varna Bay

2004 ◽  
Vol 50 (5) ◽  
pp. 317-320 ◽  
Author(s):  
G.P. Shtereva ◽  
B.S. Dzhurova ◽  
T.S. Nikolova
Keyword(s):  
Heavy Metals ◽  
Comparative Analysis ◽  
Black Sea ◽  
Hot Spots ◽  
Petroleum Hydrocarbons ◽  
The Black Sea ◽  
Ecological State ◽  
Sources Of Pollution ◽  
Anthropogenic Inputs ◽  
Many Sources

Varna Bay is one of the hot spots along the Black Sea coastal zone. Its ecological state is strongly influenced by the connection with the Varna Lake. Along the lake coast are located many sources of pollution such as rivers, ports, chemical industry, WWTPs. The shipping is another pressure on the environment. The study was carried out in the western part of the Varna Lake and Varna Bay. The following parameters: heavy metals, polichlorinated biphenyls, chlororganic pesticides, phenols, petroleum hydrocarbons were analysed in sediments. The high content of the last one is indicative for an extremely unfavourable long-year exploitation of the lake as a water route. The metals concentration in lakes sediments shows the influence of anthropogenic inputs. Comparative analysis of the sediments shows higher concentrations of contaminants in Varna Lake. and near the ports. As a consequence of the worsened state of the bottom a very poor benthic community characterizes a part of the investigated area in the lake.

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