Bacterial methanogenesis in holocene sediments of the Baltic sea
| Autor: | A. Yu. Lein, V. Ya. Trotsyuk, M. V. Ivanov, Bair B Namsaraev |
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| Rok vydání: | 1981 |
| Předmět: |
Ecology
Methanogenesis business.industry chemistry.chemical_element Sediment Microbiology Methane chemistry.chemical_compound chemistry Isotopes of carbon Natural gas Environmental chemistry Anaerobic oxidation of methane Carbon dioxide Earth and Planetary Sciences (miscellaneous) Environmental Chemistry business Carbon Geology General Environmental Science |
| Zdroj: | Geomicrobiology Journal. 2:299-315 |
| ISSN: | 1521-0529 0149-0451 |
| Popis: | Soviet biologists have found evidence of viable methanogenic microorganisms in mud samples collected in 1978 from the Baltic Sea by the research ship Academician Kurchatov. Experiments with radioactive carbon and direct measurements of the samples' methane concentrations led to several conclusions: (1) the process of bacterial methanogenesis occurs mainly via carbon dioxide reduction, (2) the methanogenic intensity depends on the depth of the deposited sediment and its distance from land; shallow-water sediments found in gulfs produced more methane than deepwater ones taken from low spots, (3) organic-matter consumption during bacterial methane reduction makes up 0.14-7.9 mg of carbon/kg of wet mud per year; this is over 20 times less than during bacterial sulfate reduction, (4) The bulk of the methane generated migrates from the muds into the water and (5) marine sediments are undersaturated with methane, suggesting that the methane migrates via filtration of pore waters, not by diffusion. |
| Databáze: | OpenAIRE |
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