Forecast of the Ecological Situation of the Black Sea under Influence of Anthropogenic Factors and Some Ways of its Therapy

1998 ◽  
pp. 357-371
Author(s):  
TS. E. Mirtskhoulava
Keyword(s):  
Black Sea ◽  
Anthropogenic Factors ◽  
The Black Sea ◽  
Ecological Situation

Modern condition of biological diversity in near-shore zone of Crimea (the Black Sea sector)

2003 ◽  
Keyword(s):  
Black Sea ◽  
Biological Diversity ◽  
Parasite Fauna ◽  
Anthropogenic Factors ◽  
The Black Sea ◽  
Quantitative Composition ◽  
Shore Zone ◽  
Near Shore ◽  
The Impact ◽  
Modern Condition

Monograph is prepared on the basis of the materials collected in near-shore waters of Crimea in 2003, and the retrospective data. Modern condition of biological diversity in near-shore zone of Crimea is shown on the basis of analysis of qualitative and quantitative composition of micro- and zooplankton, phyto- and zoobenthos, ichthyofauna and parasite fauna; the recommendations on conservation of biological diversity are given. Responses of biota on the appearance of new species in communities and on the impact of some anthropogenic factors are analyzed. Characteristics of the Black Sea plankton bioluminescents and the bioluminescence field forming by them in neritic zone of Crimea are shown. Lists of species of main groups of flora and fauna from the different regions of near-shore waters of Crimea are made.

scholarly journals Assessment of Hadzhibeysky estuary and forecasting possible water level in it

2017 ◽  
pp. 156-163
Author(s):  
Zh.R. Shakirzanova
Keyword(s):  
Surface Water ◽  
Black Sea ◽  
Treatment Plant ◽  
Anthropogenic Factors ◽  
The Black Sea ◽  
Spring Flood ◽  
Spring Period ◽  
Term Forecast ◽  
Long Term Forecasting

Introduction. Modern hydrology of the Hadzhibeysky estuary is due to natural and anthropogenic factors and characterized by their intense economic use. Since the beginning of the last century, there was an intense discharge of municipal waters from Odessa (biological treatment plant "North"). This led to a significant increase in the levels of water in the estuary, which threatened to destroy the dam that separates the estuary from the sea, with the possible flooding of residential areas and enterprises of the Peresip area, as well as the road, on the dam, especially in disastrously high water years. Purpose. The purpose problems – are estimation of filling the closed estuaries-reservoirs in north-west area of the Black sea and long–term forecasting of their condition during the spring period of year. The first task – an analysis of conditions of the Hadzhibeysky estuary in the presence of an exceptional spring flood and rain floods of exceedance probability (P = 1%). The second task – is to develop a methodology for the long-term forecasting of filling of the Hadzhibeysky estuary during the spring flood, which is the most abundant phase in the hydrological regime into the territory. Results. For the first time, the possibility of assessing the filling degree surface water from melting snow and rainfall when the estimated probability of exceeding P=1% in the closed estuaries-reservoirs of the Black Sea areas. The method of the long-term forecast of surface water during the spring period for the closed estuaries was substantiated. Typification of spring floods in accordance with their water content according to the model – discriminant function DF, which takes account of the complex of factors having an influence upon conditions of spring flood formation. Setting the probability of occurrence of the forecasting flow layers in the long-term period are implemented. Conclusion. This method allows risk assessment for sustainable land – and water use planning within the Black Sea estuaries. The method of the long-term forecast was realized by the author in operational work at the Hydrometeorological Center of the Black and Azov Seas.

scholarly journals Changes in the Oxygen Regime in the Deep Part of the Black Sea in 1980–2019

2021 ◽  
Vol 37 (2) ◽  
Author(s):  
A. V. Vidnichuk ◽  
S. K. Konovalov ◽  
◽  
Keyword(s):  
Oxygen Saturation ◽  
Black Sea ◽  
Deep Water ◽  
Anthropogenic Factors ◽  
The Black Sea ◽  
Expert Assessment ◽  
Distance Method ◽  
Oxygen Regime ◽  
Aerobic Zone ◽  
Deep Water Part

Purpose. Assessing changes in the oxygen regime of the deep-water part of the Black Sea under the influence of climatic and anthropogenic factors over the past 40 years is the goal of the work. Methods and Results. For the analysis, the expedition data (2015–2019) and those from the Databank of the Marine Hydrophysical Institute, Russian Academy of Sciences, (1980–2013) were used. The data for the deep-water part of the Black Sea (the depths exceeding 200 m) were selected from the array. The data on hydrophysical and hydrochemical parameters were subjected to expert assessment, and those including random errors in the values were excluded from the array. Then the average profiles of temperature, salinity, oxygen concentration, oxygen saturation, and nitrates concentration were plotted in the density scale (σt). Averaging was carried out by the inverse distance method followed by additional smoothing by the low-frequency filtering method. Conclusions. Against the background of the tendency of temperature increase in the upper layers of the water column and decrease of winter convective mixing intensity, the oxygen supply diminishes in all the layers of the Black Sea aerobic zone. Having been analyzed, the data for the 1980–2019 period showed that at the present stage, a “regime shift” resulting from the joint effect of climate changes and anthropogenic load took place in the ecosystem of the deep-water part of the Black Sea. Decrease in the oxygen saturation of water throughout the entire thickness of the aerobic zone shows that the process of the Black Sea basin eutrophication constitutes a significant factor affecting oxygen dynamics in the Black Sea waters.

scholarly journals Analysis of the ecological condition of water and bottom substrates of the lower Dniester by the method of biotesting on microalgae

2021 ◽  
Author(s):  
Olga Semenova ◽  
Keyword(s):  
Black Sea ◽  
Coastal Waters ◽  
Water Layer ◽  
Laboratory Culture ◽  
Ecological Condition ◽  
Anthropogenic Factors ◽  
The Black Sea ◽  
Toxic Substances ◽  
Hazardous Pollutants ◽  
Desmodesmus Communis

In the autumn-spring periods 2018 - 2020. biotesting of water and bottom sediments of the lower Dniester and Ukrainian coastal waters of the Dniester region of the Black Sea was carried out by biotesting on a laboratory culture of planktonic algae Desmodesmus communis. The assessment of the ecological and toxicological situation and a comparative analysis of indicators of the level of pollution of the ecosystem of the “lower reaches of the Dniester” testify to the chronic pollution of this ecosystem by dangerous toxicants, acute toxicity occurs only during peak periods, while chronic toxicity is constantly manifested. It was found that in the overwhelming majority of water areas with different nature of anthropogenic factors and anthropogenic load, there were no toxic substances. Hazardous pollutants were more often found in the surface water layer of the zones affected by urban wastewaters on the Ukrainian coast of the Dniester region of the Black Sea.

Biodiversity in the Black Sea: effects of climate and anthropogenic factors

Hydrobiologia ◽  
2007 ◽  
Vol 580 (1) ◽  
pp. 23-33 ◽  
Author(s):  
Yuriy Tokarev ◽  
Georgiy Shulman
Keyword(s):  
Black Sea ◽  
Anthropogenic Factors ◽  
The Black Sea

scholarly journals Changes in the Oxygen Regime in the Deep Part of the Black Sea in 1980–2019

2021 ◽  
Vol 28 (2) ◽  
Author(s):  
A. V. Vidnichuk ◽  
S. K. Konovalov ◽  
◽  
Keyword(s):  
Oxygen Saturation ◽  
Black Sea ◽  
Deep Water ◽  
Anthropogenic Factors ◽  
The Black Sea ◽  
Expert Assessment ◽  
Distance Method ◽  
Oxygen Regime ◽  
Aerobic Zone ◽  
Deep Water Part

Purpose. Assessing changes in the oxygen regime of the deep-water part of the Black Sea under the influence of climatic and anthropogenic factors over the past 40 years is the goal of the work. Methods and Results. For the analysis, the expedition data (2015–2019) and those from the Databank of the Marine Hydrophysical Institute, Russian Academy of Sciences, (1980–2013) were used. The data for the deep-water part of the Black Sea (the depths exceeding 200 m) were selected from the array. The data on hydrophysical and hydrochemical parameters were subjected to expert assessment, and those including random errors in the values were excluded from the array. Then the average profiles of temperature, salinity, oxygen concentration, oxygen saturation, and nitrates concentration were plotted in the density scale (σt). Averaging was carried out by the inverse distance method followed by additional smoothing by the low-frequency filtering method. Conclusions. Against the background of the tendency of temperature increase in the upper layers of the water column and decrease of winter convective mixing intensity, the oxygen supply diminishes in all the layers of the Black Sea aerobic zone. Having been analyzed, of the data for the 1980–2019 period showed that at the present stage, a "regime shift" resulting from the joint effect of climate changes and anthropogenic load took place in the ecosystem of the deep-water part of the Black Sea. Decrease in the oxygen saturation of water throughout the entire thickness of the aerobic zone shows that the process of the Black Sea basin eutrophication constitutes a significant factor affecting oxygen dynamics in the Black Sea waters.

Sign in / Sign up

Export Citation Format

Share Document