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Widespread formation of methane by Cyanobacteria in aquatic and terrestrial environments

M. Bižić-Ionescu, T. Klintzsch, D. Ionescu, M. Y. Hindiyeh, M. Günthel, A.M. Muro-Pastor, F. Keppler, H-P Grossart
doi: https://doi.org/10.1101/398958
M. Bižić-Ionescu
1Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Neuglobsow, Germany
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  • For correspondence: mbizic@igb-berlin.de
T. Klintzsch
2Institute of Earth Sciences, Biogeochemistry Group, Heidelberg University, Heidelberg, Germany
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D. Ionescu
1Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Neuglobsow, Germany
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M. Y. Hindiyeh
3Department of Water and Environmental Engineering, German Jordanian University, Amman, Jordan
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M. Günthel
4Department of Biosciences, Swansea University, SA2 8PP Swansea, United Kingdom
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A.M. Muro-Pastor
5Instituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas and Universidad de Sevilla, Sevilla, Spain
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F. Keppler
2Institute of Earth Sciences, Biogeochemistry Group, Heidelberg University, Heidelberg, Germany
6Heidelberg Center for the Environment (HCE), Heidelberg University, D-69120 Heidelberg, Germany
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H-P Grossart
1Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Neuglobsow, Germany
7Institute of Biochemistry and Biology, Potsdam University, Potsdam, Germany
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  • For correspondence: hgrossart@igb-berlin.de
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Abstract

Evidence is accumulating to challenge the paradigm that biogenic methanogenesis, traditionally considered a strictly anaerobic process, is exclusive to Archaea. Cyanobacteria are here shown to produce methane at substantial rates under light and dark oxic conditions, demonstrating biogenic methane production within the Bacteria, the second prokaryotic domain. Biogenic methane production was enhanced during oxygenic photosynthesis and directly attributed to the cyanobacteria by stable isotope labelling. Methanogenesis by Cyanobacteria partly explains the paradox of methane production in oxygen-saturated waters. Climate change, leading to worldwide increases in cyanobacterial blooms will accordingly have a direct feedback on warming. With a ubiquitous presence on Earth for 3.5 billion years, Cyanobacteria have had and will continue to have a substantial impact on the global methane budget.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted August 25, 2018.
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Widespread formation of methane by Cyanobacteria in aquatic and terrestrial environments
M. Bižić-Ionescu, T. Klintzsch, D. Ionescu, M. Y. Hindiyeh, M. Günthel, A.M. Muro-Pastor, F. Keppler, H-P Grossart
bioRxiv 398958; doi: https://doi.org/10.1101/398958
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Widespread formation of methane by Cyanobacteria in aquatic and terrestrial environments
M. Bižić-Ionescu, T. Klintzsch, D. Ionescu, M. Y. Hindiyeh, M. Günthel, A.M. Muro-Pastor, F. Keppler, H-P Grossart
bioRxiv 398958; doi: https://doi.org/10.1101/398958

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