A New State in the Hydrological Regime of the Sea of Azov in the 21th Century

Berdnikov, S. V.; Dashkevich, L.V.; Kulygin, V.V.

doi:10.1134/s1028334x22030059

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…Before characterising the state of fish resources, characterise the changes in their habitat conditions. Changes in environmental conditions are noted by specialists of Russian meteorological service [9] and the Academy of Sciences [10]. Thus, the first of the reports notes that the decrease in the maximum flow is characteristic of the rivers of the southern and south-western regions of Russia.…”

Section: Resultsmentioning

confidence: 99%

“…Analyses of the Azov Sea salinity and water temperature series and their anomalies relative to mean annual values for 1924-2019 allowed S.V. Berdnikov and co-authors [10] using cluster analysis to identify the following periods at the end of the 20-th and the current century: 1979-1992, 1993-1999, 2000-2010, and 2011-2019, with a distinctly visible temperature increase for the last two periods with insignificant fluctuations between them earlier. At the beginning of the XXI century characterized the low salinity and high temperature, in the second decade, while maintaining high water temperatures, very high sea salinity is observed.…”

Section: Resultsmentioning

confidence: 99%

“…The dynamics of their ratio in different segments of the current century may indicate the influence of external conditions (temperature, salinity, etc.). Based on the above results of the analysis of the series of salinity and water temperature in the Sea of Azov [9,10], as well as the available data on the size and composition of catches, we selected the following segments to characterize the ratio of the main fishery objects: 1986-1990, 2005-2010, 2011-2015, as well as the last 3 years of fishing (2020-2022) (Fig. 3).…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Current state of the Sea of Azov main commercial fishery resources and ways to restore them

Ponomareva,

Balykin,

Startsev

et al. 2023

E3S Web Conf.

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The paper presents the result of analyses of the Azov Sea fishery resources state for the last 15 years of the last century up to the present time. The information on quantitative and qualitative composition of commercial catches is obtained from the data of fishery statistics. Changes in temperature and salinity and their anomalies relative to mean annual values are highlighted. The first four commercial species with maximum catches have been identified: anchovy, kilka, gobies and Redlip mullet. The dynamics of their ratio, at different periods of the current century, may indicate the influence of external conditions (temperature, salinity, etc.). The forecast on increase of catches of the listed species and recommendation on development of the Azov sea fishery development programme, including all directions of fishery, introduction of the newest achievements of science and technology in development of aquaculture and other branches connected with rational use of aquatic biological resources of the sea are given.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Current state of the Sea of Azov main commercial fishery resources and ways to restore them

Ponomareva,

Balykin,

Startsev

et al. 2023

E3S Web Conf.

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Marine indicators of climate change in the Azov Sea ecosystem

Berdnikov

Sorokina

Kleshchenkov

et al. 2023

Journal of Sea Research

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Productivity of Marine Ecosystem Components

Al-Sodany,

Diab

2023

Marine Ecology: Current and Future Developments

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The marine ecosystem is the greatest of all ecosystems. Marine ecosystems cover approximately seventy-one percent of the Earth's surface; moreover, they contain approximately ninety-seven percent of the planet's water. Thirty-two percent of the world's net primary production is generated by them. There are many marine ecosystems environmental problems, which include marine pollution, unsustainable exploitation of marine resources (as overfishing to certain species), building on coastal areas, and climate change. From the trophical standpoint, a marine ecosystem has two groups of components: autotrophic components and heterotrophic components. The primary or basic productivity of an ecosystem could be defined as the storing rate of radiant energy by producers (chemosynthetic and photosynthetic) activity as an organic substance that can be utilized as food. The productivity of marine ecosystem greatly refers to the organic matter production by producers or autotrophs “phytoplanktons and algae,” the produced organic carbon is supplied to “heterotrophs,” which obtain their energy only from the organic matter respiration. There are many carbon-nested cycles associated with marine productivity including Grass and Net Primary Productivity (GPP and NPP, respectively) as well as Net community and Secondary productivity (NCP and SP, respectively). Fisheries depend on secondary productivity; thus they rely on both Net primary productivity and the organic matter transferring efficiency to the food web. Environmental factors as well as the change of climate may strongly impact NPP in many ways that rely on the regional as well as local physical settings, ecosystem structure, and functioning medium. 

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A New State in the Hydrological Regime of the Sea of Azov in the 21th Century

Cited by 4 publications

References 8 publications

Current state of the Sea of Azov main commercial fishery resources and ways to restore them

Current state of the Sea of Azov main commercial fishery resources and ways to restore them

Marine indicators of climate change in the Azov Sea ecosystem

Productivity of Marine Ecosystem Components

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