Wael Mahmoud Badawy
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Simulation model of 137Cs daily dynamics in the food web of the deciduous forest ecosystemMoscow University Bulletin. Series 17. Soil science. 2021. 2. p.29-37Sergey V. Mamikhin Alexey I. Shcheglov Denis N. Lipatov Valeria V. Stolbova Tatyana A. Paramonova Dmitry V. Monakhov Wael M. Badawyread more384
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The simulation model of seasonal dynamics of 137Cs in the components of the snytevoy oak forest ecosystem EcoradOak_CS_FW was further developed, which now includes first- and second-order consumers. The radiocesium redistribution in a full-scale food web of a forest ecosystem of the type “soil—vegetation cover—herbivores—predators” is modeled. The algorithm used in the model allows us to take into account the influence of soil, meteorological, phenological and physiological factors on the behavior of radionuclide in the food web and predict radiological situations under various conditions of radioactive fallout. Data on the contamination of animals with radiocesium obtained using the model are used to calculate the dynamics of the internal dose. The results of modeling can be used in the rationing of forest products of deciduous forests. The model is also applicable to the study of potassium redistribution in the trophic chain of a deciduous forest ecosystem.
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Simulation model of hourly dynamics of organic matter carbon in herbaceous vegetation communities ECOGRASSMoscow University Bulletin. Series 17. Soil science. 2022. 3. p.57-64Sergey V. Mamikhin Wael M. Badawy Denis N. Lipatov Dmitry V. Monakhov Tatyana A. Paramonova Valeria V. Stolbova Alexey I. Shcheglovread more254
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An algorithm has been developed for the simulation model of carbon behavior in herbaceous communities of various
types, both autonomous and being a part of complex phytocenoses. Th e infl uence of external factors is taken
into account such as solar radiation, precipitation, air temperature, clouds, wind speed, etc. Th e dynamics of soil
humidity and temperature are reproduced. Depending on the discreteness of consideration of the simulated processes,
the algorithm can be modifi ed. Th e algorithm was tested in modeling the dynamics of the phytomass of the
community of ground elder (Aegopodium podagraria L.), the dominant species of herbaceous cover in the elder
oak grove on dark gray forest soil. Using the ECOGRASS model, numerical experiments were carried out to study
the impact of the potential global climate change and the consumption of phytomass by animals on the productivity
of this community. Th reshold values of infl uence factors have been determined, upon reaching which the normal
functioning of the community is disrupted.Keywords: carbon balance; herbaceous communities; mathematical modeling; global climate change
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