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Dark Carbon Fixation: An Important Process in Lake Sediments
Department of Ecology, Institute of Biology, University Federal of Rio de Janeiro, Rio de Janeiro, Brazil.
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
Department of Ecology and Evolution - Limnology, Uppsala University, Uppsala, Sweden.
Department of Ecology and Evolution - Limnology, Uppsala University, Uppsala, Sweden.
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2013 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 8, no 6Article 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
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Ecology
Identifiers
URN: urn:nbn:se:liu:diva-96429DOI: 10.1371/journal.pone.0065813ISI: 000320755400067OAI: oai:DiVA.org:liu-96429DiVA: diva2:641925
Note

Funding Agencies|STINT (Sweden)||CNPq (Brazil)||Brazilian Research Council (CNPq)||

Available from: 2013-08-20 Created: 2013-08-19 Last updated: 2017-12-06

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Bastviken, David

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CiteExportLink to record
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