Articles | Volume 15, issue 2
https://doi.org/10.5194/bg-15-457-2018
https://doi.org/10.5194/bg-15-457-2018
Research article
 | 
24 Jan 2018
Research article |  | 24 Jan 2018

Quality transformation of dissolved organic carbon during water transit through lakes: contrasting controls by photochemical and biological processes

Martin Berggren, Marcus Klaus, Balathandayuthabani Panneer Selvam, Lena Ström, Hjalmar Laudon, Mats Jansson, and Jan Karlsson

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ED: Publish subject to minor revisions (review by editor) (24 Oct 2017) by Tom J. Battin
AR by Martin Berggren on behalf of the Authors (07 Nov 2017)  Author's response    Manuscript
ED: Publish as is (20 Nov 2017) by Tom J. Battin
AR by Martin Berggren on behalf of the Authors (28 Nov 2017)  Author's response    Manuscript
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Short summary
The quality of dissolved organic carbon (DOC), especially its color, is a defining feature of freshwater ecosystems. We found that colored DOC fractions are surprisingly resistant to natural degradation during water transit through many brown-water lakes. This is explained by the dominance of microbial processes that appear to selectively remove noncolored DOC. However, in lakes where sunlight degradation plays a relatively larger role, significant DOC bleaching occurs.
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