van Bodegom PM, Scholten JCM, Stams AJM. 2004. Direct inhibition of methanogenesis by ferric iron. FEMS Microbiology Ecology 49: 261-268.
These authors present the novel finding that inhibition of methanogenesis in anaerobic sediments by Fe(III) is a direct effect, and not the result of competition for resources between different species of microbes. They used three pure strains of methanogenic archaea under controlled-atmosphere conditions, and found a clear signal of methanogenesis inhibition related to the amount of Fe(III) added to liquid culture.
This paper raises some issues I need to consider in the methanogenic, anaerobic soils at some of the systems of Alexandra Fjord, especially regarding redox conditions and available electron acceptors. Additionally, this paper provides references for widely-accepted and apparently highly effective methods for measuring Fe(II) and Fe(III) in soil solutions.
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