On possible changes in phytocenoses of the Sea of Azov under climate warming
Base long-term modern scenarios of hydrochemical and temperature regimes of the Sea of Azov were considered. New schemes of modeling mechanisms of algal adaptation to changes in the hydrochemical regime and temperature were proposed. In comparison to the traditional ecological-evolutionary schemes,...
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| Format: | Article |
| Language: | Russian |
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Institute of Computer Science
2017-12-01
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| Series: | Компьютерные исследования и моделирование |
| Subjects: | |
| Online Access: | http://crm.ics.org.ru/uploads/crmissues/crm_2017_6/2017_06_10.pdf |
| _version_ | 1818289068978470912 |
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| author | Vitaly Grigor'evich Il’ichev Valerii Valer'evich Kulygin Liudmila Vladimirovna Dashkevich |
| author_facet | Vitaly Grigor'evich Il’ichev Valerii Valer'evich Kulygin Liudmila Vladimirovna Dashkevich |
| author_sort | Vitaly Grigor'evich Il’ichev |
| collection | DOAJ |
| description | Base long-term modern scenarios of hydrochemical and temperature regimes of the Sea of Azov were considered. New schemes of modeling mechanisms of algal adaptation to changes in the hydrochemical regime and temperature were proposed. In comparison to the traditional ecological-evolutionary schemes, these models have a relatively small dimension, high speed and allow carrying out various calculations on long-term perspective (evolutionally significant times). Based on the ecology-evolutionary model of the lower trophic levels the impact of these environmental factors on the dynamics and microevolution of algae in the Sea of Azov was estimated. In each scenario, the calculations were made for 100 years, with the final values of the variables and parameters not depending on the choice of the initial values. In the process of such asymptotic computer analysis, it was found that as a result of climate warming and temperature adaptation of organisms, the average annual biomass of thermophilic algae (Pyrrophyta and Cyanophyta) naturally increases. However, for a number of diatom algae (Bacillariophyta), even with their temperature adaptation, the average annual biomass may unexpectedly decrease. Probably, this phenomenon is associated with a toughening of competition between species with close temperature parameters of existence. The influence of the variation in the chemical composition of the Don Rivers flow on the dynamics of nutrients and algae of the Sea of Azov was also investigated. It turned out that the ratio of organic forms of nitrogen and phosphorus in sea waters varies little. This stabilization phenomenon will take place for all high-productive reservoirs with low flow, due to autochthonous origin of larger part of organic matter in water bodies of this type. |
| first_indexed | 2024-12-13T02:06:24Z |
| format | Article |
| id | doaj.art-37cd01000cfd4b578550cd25f60ab447 |
| institution | Directory Open Access Journal |
| issn | 2076-7633 2077-6853 |
| language | Russian |
| last_indexed | 2024-12-13T02:06:24Z |
| publishDate | 2017-12-01 |
| publisher | Institute of Computer Science |
| record_format | Article |
| series | Компьютерные исследования и моделирование |
| spelling | doaj.art-37cd01000cfd4b578550cd25f60ab4472022-12-22T00:03:07ZrusInstitute of Computer ScienceКомпьютерные исследования и моделирование2076-76332077-68532017-12-019698199110.20537/2076-7633-2017-9-6-981-9912638On possible changes in phytocenoses of the Sea of Azov under climate warmingVitaly Grigor'evich Il’ichevValerii Valer'evich KulyginLiudmila Vladimirovna DashkevichBase long-term modern scenarios of hydrochemical and temperature regimes of the Sea of Azov were considered. New schemes of modeling mechanisms of algal adaptation to changes in the hydrochemical regime and temperature were proposed. In comparison to the traditional ecological-evolutionary schemes, these models have a relatively small dimension, high speed and allow carrying out various calculations on long-term perspective (evolutionally significant times). Based on the ecology-evolutionary model of the lower trophic levels the impact of these environmental factors on the dynamics and microevolution of algae in the Sea of Azov was estimated. In each scenario, the calculations were made for 100 years, with the final values of the variables and parameters not depending on the choice of the initial values. In the process of such asymptotic computer analysis, it was found that as a result of climate warming and temperature adaptation of organisms, the average annual biomass of thermophilic algae (Pyrrophyta and Cyanophyta) naturally increases. However, for a number of diatom algae (Bacillariophyta), even with their temperature adaptation, the average annual biomass may unexpectedly decrease. Probably, this phenomenon is associated with a toughening of competition between species with close temperature parameters of existence. The influence of the variation in the chemical composition of the Don Rivers flow on the dynamics of nutrients and algae of the Sea of Azov was also investigated. It turned out that the ratio of organic forms of nitrogen and phosphorus in sea waters varies little. This stabilization phenomenon will take place for all high-productive reservoirs with low flow, due to autochthonous origin of larger part of organic matter in water bodies of this type.http://crm.ics.org.ru/uploads/crmissues/crm_2017_6/2017_06_10.pdfmathematical modelSea of Azovtemperature parametersnutrientsphytocenosesadaptation mechanisms |
| spellingShingle | Vitaly Grigor'evich Il’ichev Valerii Valer'evich Kulygin Liudmila Vladimirovna Dashkevich On possible changes in phytocenoses of the Sea of Azov under climate warming Компьютерные исследования и моделирование mathematical model Sea of Azov temperature parameters nutrients phytocenoses adaptation mechanisms |
| title | On possible changes in phytocenoses of the Sea of Azov under climate warming |
| title_full | On possible changes in phytocenoses of the Sea of Azov under climate warming |
| title_fullStr | On possible changes in phytocenoses of the Sea of Azov under climate warming |
| title_full_unstemmed | On possible changes in phytocenoses of the Sea of Azov under climate warming |
| title_short | On possible changes in phytocenoses of the Sea of Azov under climate warming |
| title_sort | on possible changes in phytocenoses of the sea of azov under climate warming |
| topic | mathematical model Sea of Azov temperature parameters nutrients phytocenoses adaptation mechanisms |
| url | http://crm.ics.org.ru/uploads/crmissues/crm_2017_6/2017_06_10.pdf |
| work_keys_str_mv | AT vitalygrigorevichilichev onpossiblechangesinphytocenosesoftheseaofazovunderclimatewarming AT valeriivalerevichkulygin onpossiblechangesinphytocenosesoftheseaofazovunderclimatewarming AT liudmilavladimirovnadashkevich onpossiblechangesinphytocenosesoftheseaofazovunderclimatewarming |