Characteristic of Lower Don aquatic ecosystem in late autumn

Matishov, Gennady G; Stepanyan, O.V.; Har’kovskii, V. M.; Старцев, А. В.; Bulysheva, N. I.; Semin, V. V.; Soier, V. G.; Kreneva, K. V.; Glushchenko, G. Yu.; Svistunova, L. D.

doi:10.1134/s009780781606004x

Cited by 7 publications

(2 citation statements)

References 6 publications

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“…The entire Don basin has been greatly transformed as a result of long-term intensive anthropogenic load (Bartsev et al, 2016). Highly productive arable land in southern Russia, industrial and mining clusters, concentrated mainly in the watershed of the Seversky Donets tributary, and intensive development of the Rostov-on-Don agglomeration are the main factors that negatively affect the lower part of the Don basin (Nikanorov and Khoruzhaya, 2012;Matishov et al, 2016;Bauer et al, 2018;Konstantinova et al, 2020;Linnik et al, 2020;Minkina et al, 2020;Sushkova et al, 2020). The highest degree of anthropogenic load is characteristic of the Don Delta and the coastal zone of the Taganrog Bay due to urbanization, river and sea transport, as well as recreational activities, which leads to a decrease in water quality, soil and sediment pollution, degradation of coastal and deltaic landscapes and vegetation (Chichaeva et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Exchangeable form of potentially toxic elements in floodplain soils along the river-marine systems of Southern Russia

Konstantinova¹,

Minkina²,

Nevidomskaya³

et al. 2021

Eurasian Journal of Soil Science (Ejss)

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Large rivers and especially their deltaic parts and adjacent coastal zones are subjected to strong anthropogenic influence and are often considered as hotspots of environmental pollution. The Don River is one of the largest and most important rivers in the South of Russia. The Don River basin is a highly urbanized area with developed agriculture and industry which negatively affect water quality, aquatic ecosystems and soils. The main objectives of the proposed research were to determine the levels exchangeable form of PHEs in soils of various aquatic landscapes of the study area, as well as to reveal the relationships between the content of exchangeable PTEs and the physical-chemical properties of floodplain soils. The obtained results showed that soils of the Lower Don and Taganrog Bay coastal zone are rather contrast in terms of properties and metal contents, which indicates the variability of landscapes, natural and anthropogenic processes in the studied systems. High CV values for a number of metals such as Pb, Zn, Cd and Cr indirectly indicate strong anthropogenic influence on these environments. The group median values for extractable forms for most of the metals except for Cu and Ni were higher for urbanized areas. The results of PCA analysis showed that there are two association of metals in terms of geochemical behavior and sources. The first one included Cr-Zn-Pb-Cd, the elements of anthropogenic origin, the second Mn, Ni, and Cu, which are probably of mixed origin. The obtained results showed that the Lower Don and Taganrog Bay coastal zone is a diverse and complex system subjected to anthropogenic activities, which is pronounced in the enrichment of aquatic soils with a number of metals and higher proportions of exchangeable forms from different types of sources that likely can be of both local and whole basin scale. KKeywords: Floodplain, heavy metals, Fluvisols, the Don River, Taganrog Bay, Azov Sea.

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Section: Introductionmentioning

confidence: 99%

Exchangeable form of potentially toxic elements in floodplain soils along the river-marine systems of Southern Russia

Konstantinova¹,

Minkina²,

Nevidomskaya³

et al. 2021

Eurasian Journal of Soil Science (Ejss)

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“…Одна из основных причин заключается в отсутствии мониторинга хозяйственного использования пойменных земель, а статистические наблюдения отдельно по пойменным землям не ведутся [Дубинина, 2019; Жукова, 2020]. Имеющиеся работы касаются либо экологического состояния водоемов [Косенко и др., 2018;Matishov et al, 2016], либо гидрологических проблем Дона и функционирования Цимлянского гидроузла [Киреева и др., 2018а; Bolgov et al, 2020;Georgiadi et al, 2020;Dzhamalov et al, 2010;Dzhamalov et al, 2013;Korobkina et al, 2020;Osipova, Bolgov, 2020;Panin et al, 2016;Varentsova et al, 2020]. Оценки современного со-стояния и хозяйственного освоения нерестилищ поймы Дона в его нижнем течении отсутствуют [Дубинина, 2019; Жукова, 2020].…”

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Actual State of the Lower Don Spawning Grounds According to Remote Sensing Data

Shinkarenko

Vasilchenko

2023

Lomonosov Geography Journal

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The construction of the Tsimlyansk reservoir in 1952 and the actual climate changes led to significant reduction of spring water flow and the area of the Lower Don River spawning grounds. About 300 thousand hectares of spawning lands were flooded in 1963, while not more than 130 thousand hectares in 1979-1994. In later years water often didn't rise to the floodplain at all. As a result, the fishing industry of the Lower Don River underwent degradation and the spawning grounds were ploughed or built over. The spawning grounds of the Lower Don were the basis for the reproduction of anadromous and semi-anadromous fish of the Azov - Don basin, which has already lost its commercial value for sturgeon and herring. The article presents the results of mapping the modern structure of the floodplain lands of the Lower Don River within the flooding areas in different years. The areas of 1979-2018 floods were determined by processing the Landsat satellite images; the modern structure of their land use was mapped according to Sentinel-2 data. The types of land cover were also analyzed using the global data (GLC30 and ESRI). Within the area of 1979-1994 flooding there are 0,7 thousand hectares of built-up territories, about 30 thousand hectares of arable land and 10 thousand hectares of fallow lands. There is a threat of flooding the buildings and other infrastructure facilities, therefore the floods in the Lower Don River area are now perceived as a negative phenomenon. It is necessary to impose restrictions on the economic use of floodplain lands, and ban the construction activities and stocking of oil products, fertilizers and pesticides within the 1994 flooding area. Application of satellite monitoring technologies is a promising tool for assessing the economic development of floodplain lands and identification of flooded lands. In the future, it is possible to create an automated system for monitoring floodplains of the Don River and other rivers, basing among other on the satellite microwave radiometry data. The advantage of such data is the independence from the presence of clouds, which impedes satellite observations in the visible range

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