Articles | Volume 13, issue 14
Research article
29 Jul 2016
Research article |  | 29 Jul 2016

Chemodiversity of dissolved organic matter in the Amazon Basin

Michael Gonsior, Juliana Valle, Philippe Schmitt-Kopplin, Norbert Hertkorn, David Bastviken, Jenna Luek, Mourad Harir, Wanderley Bastos, and Alex Enrich-Prast

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Cited articles

Amado, A. M., Farjalla, V. F., Esteves, F. D. A., Bozelli, R. L., Roland, F., and Enrich-Prast, A.: Complementary pathways of dissolved organic carbon removal pathways in clear-water Amazonian ecosystems: photochemical degradation and bacterial uptake, Fems Microbiol. Ecol., 56, 8–17,, 2006.
Aucour, A. M., Tao, F. X., Moreira-Turcq, P., Seyler, P., Sheppard, S., and Benedetti, M. F.: The Amazon River: behaviour of metals (Fe, Al, Mn) and dissolved organic matter in the initial mixing at the Rio Negro/Solimões confluence, Chem. Geol., 197, 271–285,, 2003.
Benner, R., Opsahl, S., ChinLeo, G., Richey, J. E., and Forsberg, B. R.: Bacterial carbon metabolism in the Amazon River system, Limnol. Oceanogr., 40, 1262–1270, 1995.
Boutegrabet, L., Kanawati, B., Gebefügi, I., Peyron, D., Cayot, P., Gougeon, R. D., and Schmitt-Kopplin, P.: Attachment of Chloride Anion to Sugars: Mechanistic Investigation and Discovery of a New Dopant for Efficient Sugar Ionization/Detection in Mass Spectrometers, Chem.-Eur. J., 18, 13059–13067,, 2012.
Bro, R. and Smilde, A. K.: Principal component analysis, Anal. Meth., 6, 2812–2831,, 2014.
Short summary
We present in this study a highly diverse and complex chemodiversity of dissolved organic matter (DOM) in the Amazon Basin analyzed by modern ultrahigh-resolution mass spectrometry and optical property analyses. DOM within the Rio Madeira (white water), Rio Negro (black water) and Rio Tapajós (clear water) area showed a large overlap of thousands of molecular formulae, but also unique signatures were apparent for each region, with significant correlations to colored DOM.
Final-revised paper