Artificial radionuclides in sediments of the Don River Estuary and Azov Sea

Matishov, G. G.; Matishov, D. G.; Namjatov, Alexey A.; Carroll, JoLynn; Dahle, S.

doi:10.1016/s0265-931x(01)00081-9

Cited by 16 publications

(6 citation statements)

References 10 publications

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“…Figure 2 shows the surface distributions of the simulated substances' concentrations: green algae, bluegreen algae, diatoms, phosphates, nitrates, as the most preferred nutrient compounds for all phytoplankton species, and silicon compounds, which are actively consumed by diatoms. The obtained distributions of substance concentrations are consistent with the data of long-term observations [26,38]. The results of modeling the dynamics of the main phytoplankton populations qualitatively coincide with the data of the Earth's space sensing.…”

Section: Numerical Experimentssupporting

confidence: 85%

Sufficient Conditions for the Existence and Uniqueness of the Solution of the Dynamics of Biogeochemical Cycles in Coastal Systems Problem

et al. 2022

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The article considers a three-dimensional mathematical model of population dynamics based on a system of non-stationary parabolic advection-diffusion-reaction equations with lower derivatives describing the advective motion of the aquatic environment and non-linear source functions. In contrast to the previous authors’ works devoted to the description of this model and its numerical implementation, this article presents the results of an analytical study of the initial-boundary value problem corresponding to this model. For these purposes, the original initial-boundary value problem is linearized on a single time grid—for all nonlinear sources, their final spatial distributions for the previous time step are used. As a result, a chain of initial-boundary value problems is obtained, connected by initial—final data at each step of the time grid. For this chain of linearized problems, the existence and uniqueness of the solution of the initial-boundary value problem for the system of partial differential equations in the Hilbert space were researched. Numerical experiments were performed for model problems of the main types of phytoplankton populations in coastal systems under the influence of dynamically changing biotic and abiotic factors, the results of which are consistent with real physical experiments. The developed model, including the proposed model of biological kinetics, allows for the study of the productive and destructive processes of the shallow water body biocenosis to assess the state of the processes of reproduction of valuable and commercial fish participating in the food chain with selected species of summer phytoplankton.

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Section: Numerical Experimentssupporting

confidence: 85%

Sufficient Conditions for the Existence and Uniqueness of the Solution of the Dynamics of Biogeochemical Cycles in Coastal Systems Problem

et al. 2022

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“…Current state of affairs with fish products' production and consumption, is due to the organizational complexity of the fishing industry, compared to other industries. Competent organization of fishing, which is not profitable in all regions of Russia, requires a fishing fleet, provision with rescue equipment, technically advanced and efficient fishing gear, liquid fuel and much more [7,8]. In addition, food processing technologies' availability, whose task is to provide raw materials with flavoring qualities, is important.…”

Section: Introductionmentioning

confidence: 99%

Ecological approach to fish productivity preservation prospects of Rostov region water bodies

Neidorf,

Tkacheva,

Kokhanov

et al. 2024

BIO Web Conf.

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Ensuring food availability in such volumes that, without taking into account imports, the availability of foodstuffs is not lower than the world average consumption norms requires the expansion of the range of enterprises producing food products. Given the need to follow the Strategy for the Development of the Fishery Complex of the Russian Federation adopted in November 2019, covering the period until 2030, it should, in addition to measures including infrastructure reorganization, increasing catch and industrial production of fish products, increasing processed fish products range, it is necessary to consider the importance of fishery water bodies’ state and assess their fish productivity level. Under high anthropogenic impact on the water bodies of the Nizhnedonsky basin conditions, a hydrobiological situation is formed, when the increase in phytoplankton content indicates not an increase in fish productivity, but eutrophication high degree, while overgrowing of the water body is stimulated. Thus, the most popular fish productivity determination method, associated with food base level determination, will not give a sufficiently accurate water body’s fishery potential representation, as the increase in biomass level creates less favorable conditions for the vital activity of commercial fish species.

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“…Most previous papers investigating fluvial transport of Chernobyl debris into the Black Sea have focused on 137 Cs and 90 Sr [3][4][5]. Also associated with direct atmospheric fallout as well as fluvial transport, however, are nonvolatile radionuclides from fuel particles, including transuranium elements (Np, Pu, Am, Cm).…”

Section: Introductionmentioning

confidence: 99%

Fluvial Transport of Chernobyl Plutonium (Pu) to the Black Sea: Evidence from 240Pu/239Pu Atom Ratios in Danube Delta Sediments

Ketterer¹

2010

TOCBMJ

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Artificial radionuclides in sediments of the Don River Estuary and Azov Sea

Cited by 16 publications

References 10 publications

Sufficient Conditions for the Existence and Uniqueness of the Solution of the Dynamics of Biogeochemical Cycles in Coastal Systems Problem

Sufficient Conditions for the Existence and Uniqueness of the Solution of the Dynamics of Biogeochemical Cycles in Coastal Systems Problem

Ecological approach to fish productivity preservation prospects of Rostov region water bodies

Fluvial Transport of Chernobyl Plutonium (Pu) to the Black Sea: Evidence from 240Pu/239Pu Atom Ratios in Danube Delta Sediments

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