Berggren, Martin

del Giorgio, Paul A.

Guillemette, Francois

Lapierre, Jean-Francois

English

Lund University Publications

LUND UNIVERSITYPO Box 117221 00 Lund+46 46-222 00 00Organic carbon processing in inland waters : potential feedback between browningand climateLapierre, Jean-Francois; Guillemette, Francois; Berggren, Martin; del Giorgio, Paul A.2012Link to publicationCitation for published version (APA):Lapierre, J-F., Guillemette, F., Berggren, M., & del Giorgio, P. A. (2012). Organic carbon processing in inlandwaters : potential feedback between browning and climate. Abstract from ASLO Aquatic Sciences Meeting :Voyages of Discovery, 2012, Lake Biwa, Shiga, Japan.Total number of authors:4General rightsUnless other specific re-use rights are stated the following general rights apply:Copyright and moral rights for the publications made accessible in the public portal are retained by the authorsand/or other copyright owners and it is a condition of accessing publications that users recognise and abide by thelegal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private studyor research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portalRead more about Creative commons licenses: https://creativecommons.org/licenses/Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will removeaccess to the work immediately and investigate your claim.Lapierre JF (oral), F Guillemette, M Berggren and PA del Giorgio. 2012. Organic carbon processing in inland waters: potential feedback between browning and climate. 2012 ASLO Aquatic Sciences Meeting: Voyages of Discovery, presented on July 11, 2012, at Lake Biwa, Shiga, Japan  ABSTRACT Inland waters are becoming enriched in brown-colored terrestrial organic carbon (termed “browning”), due to increasing exports of colored dissolved organic matter (CDOM) from land to water. The current state of knowledge, however, does not allow to predict the potential impact of browning on global freshwater CO2 efflux, due to a lack of quantitative estimates of the biological and photochemical reactivity of this terrestrial organic carbon at relevant spatial and temporal scales. Here we present empirical evidence that both the amount and the proportion of dissolved organic carbon that can be transformed into CO2 by bacterial and photochemical oxidation increase as water becomes richer in colored organic carbon across a wide range of temperate and boreal aquatic environments, implying that browning will enhance current aquatic CO2 fluxes to the atmosphere, at a continental scale. Considering the major contribution of inland waters to the global carbon cycle, current and future browning may represent an indirect, but potentially globally significant positive feedback to climate change that has not yet been taken into account. 

Organic carbon processing in inland waters : potential feedback between browning and climate

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Organic carbon processing in inland waters : potential feedback between browning and climate

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