Articles | Volume 13, issue 18
https://doi.org/10.5194/bg-13-5405-2016
https://doi.org/10.5194/bg-13-5405-2016
Research article
 | 
28 Sep 2016
Research article |  | 28 Sep 2016

Shift in the chemical composition of dissolved organic matter in the Congo River network

Thibault Lambert, Steven Bouillon, François Darchambeau, Philippe Massicotte, and Alberto V. Borges

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Cited articles

Baines, S. B. and Pace, M. L.: The production of dissolved organic matter by phytoplankton and its importance to bacteria: patterns across marine and freshwater systems, Limnol. Oceanogr., 36, 1078–1090, 1991.
Bano, N., Moran, M. A., and Hodson, R. E.: Photochemical formation of labile organic matter from two components of dissolved organic carbon in a freshwater wetland, Aquat. Microb. Ecol., 16, 95–102, 1998.
Battin, T. J.: Dissolved organic matter and its optical properties in a blackwater tributary of the upper Oricono river, Venezuela, Org. Geochem., 28, 561–569, 1998.
Battin, T. J., Kaplan, L. A., Findlay, S., Hopkinson, C. S., Marti, E., Packman, A. I., Newbold, J. D., and Sabater, F.: Biophys- ical controls on organic carbon fluxes in fluvial networks, Nat. Geosci., 1, 95–100, 2008.
Berggren, M., Lapierre, J.-F., and del Giorgio, P. A.: Magnitude and regulation of bacterioplankton respiratory quotient across freshwater environmental gradients, ISME J., 6, 984–993, https://doi.org/10.1038/ismej.2011.157, 2012.
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Short summary
This paper aims to investigate the spatial variability in dissolved organic matter (DOM) in terms of both concentration and composition in the Congo River network. Stable carbon isotopes and absorption and fluorescent properties of DOM were used as proxies for DOM composition. This study shows that DOM degradation within the Congo Basin results in the transition from aromatic to aliphatic DOM as well as the role of landscape and water residence time on this transition.
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