МІНЛИВІСТЬ КИСНЕВО-БЕЗКИСНЕВИХ УМОВ У ПРИДОННОМУ ШАРІ НАД ДІДЯНКИМИ МЕТАНОВИХ СИПІВ НА КОНТИНЕНТАЛЬНОМУ СХИЛІ ПІВНІЧНО-ЗАХІДНОЇ ЧАСТИНИ ЧОРНОГО МОРЯ
CTD data, H2S water column samples and detailed bathymetric survey of the underwater Dnieper paleo-delta were analyzed to study of temporal and spatial fluctuations of oxic/anoxic interface over the gas seepage area, where methane-related microbial mats and carbonate reefs are highly developed. Time...
Збережено в:
Дата: | 2023 |
---|---|
Автори: | , |
Формат: | Стаття |
Мова: | English |
Опубліковано: |
Marine Ecological Journal
2023
|
Теми: | |
Онлайн доступ: | https://mej.od.ua/index.php/mej/article/view/349 |
Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
Назва журналу: | Marine Ecological Journal |
Репозитарії
Marine Ecological JournalРезюме: | CTD data, H2S water column samples and detailed bathymetric survey of the underwater Dnieper paleo-delta were analyzed to study of temporal and spatial fluctuations of oxic/anoxic interface over the gas seepage area, where methane-related microbial mats and carbonate reefs are highly developed. Time-series CTD measurements have allowed to estimate temporal variability of the isopycnal surfaces with sigma-theta (σ) values 15.4 (oxycline encased with the permanent pycnocline) and 16.2 (oxic/anoxic interface). In the investigated region quasi-periodical vertical fluctuations of the H2S-waters upper boundary (σ = 16.2) between 130 and 165 m depths, i.e. up to 35 meters, have been observed. At the area of massive microbial reefs within this depths range a seabed slope angles have been changed from 1.5o to 13.0o. Accordingly, a specific belt–like zone of periodic near-bottom water redox-changes could to cover a great distance across the shelf slope – up to 1100 m. In view of fact that microbial control of methane oxidation and control of CH4-fluxes it can be both aerobic or anaerobic process, it should to influence on the type, pathways and activity of microbial oxidation of methane within the gas seep fields. |
---|