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Dark Carbon Fixation: An Important Process in Lake Sediments
Department of Ecology and Evolution - Limnology, Uppsala University, Uppsala, Sweden. (Climate Impacts Research Centre (CIRC))ORCID iD: 0000-0002-4949-9792
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2013 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 8, no 6, article id e65813Article in journal (Refereed) Published
Abstract [en]

Close to redox boundaries, dark carbon fixation by chemoautotrophic bacteria may be a large contributor to overall carbon fixation. Still, little is known about the relative importance of this process in lake systems, in spite the potentially high chemoautotrophic potential of lake sediments. We compared rates of dark carbon fixation, bacterial production and oxygen consumption in sediments from four Swedish boreal and seven tropical Brazilian lakes. Rates were highly variable and dark carbon fixation amounted up to 80% of the total heterotrophic bacterial production. The results indicate that non-photosynthetic carbon fixation can represent a substantial contribution to bacterial biomass production, especially in sediments with low organic matter content.

Place, publisher, year, edition, pages
Public Library of Science , 2013. Vol. 8, no 6, article id e65813
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Ecology
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URN: urn:nbn:se:umu:diva-130863DOI: 10.1371/journal.pone.0065813OAI: oai:DiVA.org:umu-130863DiVA, id: diva2:1070161
Available from: 2017-01-31 Created: 2017-01-31 Last updated: 2018-06-09Bibliographically approved

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Gudasz, Cristian

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