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Carbon dioxide supersaturation promotes primary production in lakes
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. (Arcum)
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2012 (English)In: Ecology Letters, ISSN 1461-023X, E-ISSN 1461-0248, Vol. 15, no 6, 527-532 p.Article in journal, Letter (Refereed) Published
Abstract [en]

Ecology Letters (2012) Abstract A majority of the worlds lakes are supersaturated with respect to carbon dioxide (CO2). By experimental manipulation of the CO2 concentration in supersaturated boreal lakes, we demonstrate that phytoplankton primary production was up to 10 times higher in supersaturated lake water in comparison with water with CO2 at equilibrium concentrations and that CO2, together with nutrients, explained most of the variation in pelagic primary production and phytoplankton biomass over a wide variety of unproductive lakes. These results suggest that phytoplankton can be co-limited by CO2 and nutrients in unproductive lakes. As import of terrestrial organic carbon and its subsequent microbial mineralisation in lakes is a driving force of CO2-supersaturation our results suggest that lake productivity and carbon cycling may respond to variations in terrestrial organic carbon export, (e.g. caused by land use or climate change) in ways not described before.

Place, publisher, year, edition, pages
2012. Vol. 15, no 6, 527-532 p.
Keyword [en]
CO2-supersaturation, lake ecosystems, primary production
National Category
Earth and Related Environmental Sciences Ecology
Identifiers
URN: urn:nbn:se:umu:diva-56202DOI: 10.1111/j.1461-0248.2012.01762.xISI: 000303666200003OAI: oai:DiVA.org:umu-56202DiVA: diva2:532812
Available from: 2012-06-12 Created: 2012-06-12 Last updated: 2017-12-07Bibliographically approved

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Jansson, MatsKarlsson, JanJonsson, Anders

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