Carbonate Beaches of the Eastern Part of the Sea of Azov under Anthropogenic Impact

2002 ◽  
Author(s):  
Ruben D. Kos'yan ◽  
Vladimir M. Peshkov ◽  
Nikolay V. Yesin ◽  
Sergey Yu. Shcherbakov
Keyword(s):  
Anthropogenic Impact ◽  
Sea Of Azov ◽  
The Sea Of Azov

CHRONOLOGY OF CONTEMPORARY SEDIMENTATION AND POLLUTANTS ACCUMULATION IN THE BOTTOM SEDIMENTS OF THE SEA OF AZOV

2017 ◽  
Author(s):  
Andrey Kuznetsov ◽  
Andrey Kuznetsov ◽  
Yury Fedorov ◽  
Yury Fedorov ◽  
Paul Fattal ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
Anthropogenic Impact ◽  
Specific Activity ◽  
Sediment Cores ◽  
Anthropogenic Pressure ◽  
Layer By Layer ◽  
Sediment Layer ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
Don River

Bottom sediments formed in the water bodies under the technogenic impact are important environmental factors affecting water quality and hydrobiota. Usually they consist of natural and technogenic material and differ from natural formations by their morphology, chemical and lithological composition, physicochemical and biochemical properties. In the present paper we use the term “sediment layer of anthropogenic impact” to define the sediment layer containing technogenic material and/or chemical pollutants. The determination of its location in the sediment cores, its thickness and accumulation chronology is an important scientific problem. In the paper the results of layer by layer study of Cs-137, Am-241, Pb-210 specific activities as well as concentrations of petroleum components, lead and mercury in 48 sediment cores of the Sea of Azov and the Don River are examined. The sediment core layers are dated by radiological methods. In all the sediment cores the peak of Cs-137 specific activity related to the Chernobyl accident was detected. In the Sea of Azov, this peak is located in the upper sediment layer up to 10 cm thick, however, in the delta and in the near-delta part of the Don River, where the sedimentation rates are more important, it is found at 20 to 40 cm depth. Also in certain sediment cores the second peak of Cs-137 related to the global nuclear fallout of the 1960s was found. The most of petroleum components, lead and mercury quantities are concentrated in the upper sediment layer formed in the last 50 to 70 years, i.e. in the period of the most important anthropogenic pressure. So, this complex approach based on the data on the vertical distribution of technogenic radionuclides and common pollutants in the sediment cores made it possible to identify and delineate the sediment layer of high anthropogenic impact as well as to assess the duration of this impact.

CHRONOLOGY OF CONTEMPORARY SEDIMENTATION AND POLLUTANTS ACCUMULATION IN THE BOTTOM SEDIMENTS OF THE SEA OF AZOV

2017 ◽  
Author(s):  
Andrey Kuznetsov ◽  
Andrey Kuznetsov ◽  
Yury Fedorov ◽  
Yury Fedorov ◽  
Paul Fattal ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
Anthropogenic Impact ◽  
Specific Activity ◽  
Sediment Cores ◽  
Anthropogenic Pressure ◽  
Layer By Layer ◽  
Sediment Layer ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
Don River

Bottom sediments formed in the water bodies under the technogenic impact are important environmental factors affecting water quality and hydrobiota. Usually they consist of natural and technogenic material and differ from natural formations by their morphology, chemical and lithological composition, physicochemical and biochemical properties. In the present paper we use the term “sediment layer of anthropogenic impact” to define the sediment layer containing technogenic material and/or chemical pollutants. The determination of its location in the sediment cores, its thickness and accumulation chronology is an important scientific problem. In the paper the results of layer by layer study of Cs-137, Am-241, Pb-210 specific activities as well as concentrations of petroleum components, lead and mercury in 48 sediment cores of the Sea of Azov and the Don River are examined. The sediment core layers are dated by radiological methods. In all the sediment cores the peak of Cs-137 specific activity related to the Chernobyl accident was detected. In the Sea of Azov, this peak is located in the upper sediment layer up to 10 cm thick, however, in the delta and in the near-delta part of the Don River, where the sedimentation rates are more important, it is found at 20 to 40 cm depth. Also in certain sediment cores the second peak of Cs-137 related to the global nuclear fallout of the 1960s was found. The most of petroleum components, lead and mercury quantities are concentrated in the upper sediment layer formed in the last 50 to 70 years, i.e. in the period of the most important anthropogenic pressure. So, this complex approach based on the data on the vertical distribution of technogenic radionuclides and common pollutants in the sediment cores made it possible to identify and delineate the sediment layer of high anthropogenic impact as well as to assess the duration of this impact.

scholarly journals OSTRACODS IN THE PLANKTON OF THE SIVASH BAY (THE SEA OF AZOV) DURING ITS TRANSFORMATION FROM BRACKISH TO HYPERSALINE STATE

2017 ◽  
Vol 14 ◽  
pp. 102-108 ◽  
Author(s):  
Inna Drapun ◽  
Elena Anufriieva ◽  
Nickolai Shadrin ◽  
Yulia Zagorodnyaya
Keyword(s):  
Species Composition ◽  
Anthropogenic Impact ◽  
Significant Positive Correlation ◽  
Ecosystem Change ◽  
Salinity Range ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
The North ◽  
Salinity Increase ◽  
Ostracod Species

Bay Sivash (the Sea of Azov), the largest lagoon in Europe, demonstrates a sharp ecosystem change due to anthropogenic impact. A pronounced salinity increase occurs as a result of the decision to stop supplying Dnieper water into the North-Crimean Canal. Salinity has increased from 20–22 g/L to 55–75 g/L in the lagoon. This led to the changes of biotic composition. The authors used data on ostracod species composition and abundance in samples of 2014–2016 samples with comparison with data from samples collected in 2004, before the salinity increase. The identification of ostracod species in the Sivash Bay was first made; five species was found in 2004–2016: Cyprideis torosa (Jones, 1850), Loxoconcha bulgarica Caraion, 1960, Loxoconcha aestuarii Marinov, 1963, Cytherois cepa Klie, 1937, Leptocythere devexa Schornikov, 1966. In June and August 2004, the average ostracod abundance in plankton was 22 ind./m3 (CV = 1.506). In October 2014, the ostracod abundance in the plankton reached 210 ind./m3, and in August 2015 – average of 1273 ind./m3 (CV = 1.220). In some plankton samples, ostracods dominated in numbers and reached 3850 ind./m3. In the salinity range of 50–80 g/L, a significant positive correlation was observed between total ostracod abundance in plankton and salinity.

Artificial radionuclides, mercury, lead, and oil components in sediment cores as markers of the Anthropocene Epoch

2021 ◽  
Author(s):  
Yury Fedorov ◽  
Andrey Kuznetsov ◽  
Irinageo Dotsenko ◽  
Anna Mikhailenko
Keyword(s):  
Bottom Sediments ◽  
Working Group ◽  
Anthropogenic Impact ◽  
Sediment Cores ◽  
Water Bodies ◽  
Sedimentation Rates ◽  
Sea Of Azov ◽  
The Holocene ◽  
The Sea Of Azov ◽  
Oil Components

<p>The majority of researches of the Working group on the ‘Anthropocene’ of the International Commission on Stratigraphy (ICS) voted for the recognition of the Anthropocene as a formal chrono-stratigraphic unit characterized by profound alterations of several conditions and processes on Earth by human impact. It is also proposed to place its beginning and the end of the Holocene epoch in the mid-20th century, coinciding with the launch of nuclear weapon tests [1]. In contemporary sediment cores of the Sea of ​​Azov, the Don and the Kuban rivers, we will distinguish a "layer of anthropogenic impact", meaning the layer containing considerable quantities of technogenic material and (or) pollutants [2]. To reveal the chronology of its formation, its thickness, and boundaries, it is proposed to use the results of layer-by-layer determining of the Cs-137 and Am-241 specific activities, as well as the content of oil components, lead and mercury in the bottom sediments of the water bodies. The upper Cs-137 peak formed due to the Chernobyl accident and sometimes the lower Cs-137 and Am-241 peaks related to the global radioactive fallout in the 1950s and 1960s have been detected [3]. The decrease of mercury, lead, and oil components concentrations from the upper to the lower parts of sediment cores has also been observed. The results of analysis of technogenic radionuclides and priority pollutants distribution have proved that since the 1950s and 1960s in the bottom sediments of the Sea of ​​Azov and water bodies of its basin the “layer of anthropogenic impact" has been being formed. Its thickness varies from 20 to 50 cm and may even exceed 50 cm in areas characterized by high sedimentation rates. It has been found out that in the mid-20th century the ecosystem of the Sea of ​​Azov began to suffer from intense anthropogenic pressure, which reached its maximum in the 1970s and 1980s. It is proposed to consider the studied pollutants (technogenic radionuclides, mercury, lead, and oil components) as a possible set of priority markers of the Anthropocene epoch. The Holocene - Anthropocene boundary should be placed at the base of the identified “layer of anthropogenic impact”.</p><p> </p><p>The research was supported by the Russian Foundation for Basic Research, project no. 19-05-50097.</p><p> </p><p>Bibliography</p><p>[1] Working Group on the ‘Anthropocene’. Results of binding vote by AWG. http://quaternary.stratigraphy.org/working-groups/anthropocene/ (last accessed 17 January 2021).</p><p>[2] Kuznetsov A.N., Fedorov Yu.A., and Yaroslavtsev V.M. (2018) Technogenic and natural radionuclides in the bottom sediments of the Sea of Azov: regularities of distribution and application to the study of pollutants accumulation chronology. IOP Conference Series: Earth and Environmental Science 107, 012063.</p><p>[3] Fedorov Yu.A., Kuznetsov A.N., and Trofimov M.E. (2008) Sedimentation rates in the Sea of Azov inferred from Cs-137 and Am-241 specific activity. Doklady Earth Sciences, vol. 423, no. 1, pp. 1333-1334.</p>

scholarly journals Dynamics of landscapes of the spit Dolgaya

2018 ◽  
Vol 26 (3) ◽  
pp. 379-385
Author(s):  
Anna Mikhaylovna Aleinikova ◽  
V V Krylenko
Keyword(s):  
Anthropogenic Impact ◽  
Landscape Dynamics ◽  
Maximum Height ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
Western Side ◽  
Lithological Composition ◽  
Taganrog Bay

This paper is devoted to the analysis of the landscape dynamics of the Dolgaya Spit, Taganrog Bay of the Sea of Azov. The analysis of the dynamics of the lithological composition, topography, soil, vegetation, anthropogenic impact. The formation of new shafts of beach-forming material from sand and shell occurs continuously on the western side of the spit. The maximum height is reached by the newly formed ramparts on the western part of the spit, as the height of the shafts decreases to the east.

scholarly journals ANTHROPOGENIC AQUA LANDSCAPES OF THE SEA OF AZOV

2021 ◽  
pp. 30-38
Author(s):  
Vorovka V.P.
Keyword(s):  
Anthropogenic Impact ◽  
Anthropogenic Activities ◽  
Water Area ◽  
Anthropogenic Activity ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
Current State ◽  
Living Organisms ◽  
Main Component ◽  
Xix Century

The article, based on historical and geographical analysis, attempts to identify all the diversity of anthropogenic aqua landscapes caused by different types of anthropogenic activities. Periodicals and seven periods of anthropogenic impact on the waters of the Sea of Azov and its consequences have been identified. It was found that the anthropogenic impact was most intense during the second half of the XIX century (construction and development of ports) and in 1950–2000 (intensive development of industry, agriculture, industrial fishing). The term “aqua landscapes” and the reasons for its differences from the landscape on land are defined. It was found that the aqua landscape is a geographical landscape, the structure and functioning of which is determined by fresh or salt running or standing water, which is its main component, as well as the habitat of living organisms. Aqua landscapes differ significantly from terrestrial landscapes both in features of structure and in functioning, which is determined by the formation and development in the aquatic environment. Anthropogenic aqua landscapes are altered or transformed by human activities aqua landscapes. Their functioning in the sea occurs according to natural laws.It was found that anthropogenic aqua landscapes were formed as a result of direct and indirect anthropogenic activities. Direct types of impact are caused by the development of sand and shell deposits, laying and regular clearing of suitable sea channels to the ports of Genichesk, Berdyansk and Mariupol and dredging works in their waters, dumping of soils on the seabed. Indirect anthropogenic impact is associated with pollution of water masses and bottom sediments by municipal, industrial and irrigation effluents, removal of pollution by rivers of the Azov basin, vehicle emissions, etc. The scheme of anthropogenic impact on the aqua landscapes of the Sea of Azov is concluded. The current state of anthropogenic aqua landscapes in the sea is revealed.Key words: aqua landscape, anthropogenic activity, anthropogenic aqua landscape, water area of the Sea of Azov. У статті на основі історико-географічного аналізу зроблена спроба виявити різноманіття антропогенних акваландшафтів, спричинених різними видами антропогенної діяльності. Здійснено періодику і виокремлено сім періодів антропогенного впливу на акваторію Азовського моря та його наслідки. З’ясовано, що найбільшою інтенсивністю вирізнявся антропогенний вплив упродовж другої половини ХІХ століття (будівництво і розвиток портів) та у 1950–2000-і роки (інтенсивний розвиток промисловості, сільського господарства, промислового рибальства).Визначений термін «акваландшафт» та причини його відмінностей від ландшафту на суходолі. Виявлено, що акваландшафт – це географічний ландшафт, структура та функціонування якого визначається прісною чи солоною текучою або стоячою водою, яка є його головним компонен-том, а також є середовищем існування живих організмів. Акваландшафти суттєво відрізняються від суходільних ландшафтів як за особливостями структури, так і за функціонуванням, що визначається формуванням і розвитком у водному середовищі. Антропогенні акваландшафти – це змінені або перетворені діяльністю людини акваландшафти. Їх функціонування в акваторії моря відбувається за природними законами.З’ясовано, що антропогенні акваландшафти сформувалися внаслідок прямої та непрямої антро-погенної діяльності. Прямі види впливу спричинені розробкою піщано-черепашкових відкладів, прокладанням та регулярним розчищенням підхідних морських каналів до портів Генічеська, Бердянська та Маріуполя та днопоглиблювальними роботами в їх акваторії, дампінгуванням ґрунтів на морському дні. Непрямий антропогенний вплив пов’язаний із забрудненням водних мас і донних осадів комунальними, промисловими та зрошувальними стоками, винесенням забруднень річками азовського басейну, викидами транспортних засобів тощо. Укладена схема антропогенного впливу на акваландшафти Азовського моря. Виявлений сучасний стан антропогенних аква-ландшафтів в акваторії моря.Ключові слова: акваландшафт, антропогенна діяльність, антропогенний акваландшафт, акваторія Азовського моря.

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