Articles | Volume 12, issue 22
https://doi.org/10.5194/bg-12-6669-2015
https://doi.org/10.5194/bg-12-6669-2015
Research article
 | 
24 Nov 2015
Research article |  | 24 Nov 2015

Controls on dissolved organic matter (DOM) degradation in a headwater stream: the influence of photochemical and hydrological conditions in determining light-limitation or substrate-limitation of photo-degradation

R. M. Cory, K. H. Harrold, B.T. Neilson, and G. W. Kling

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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.
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Brooks, M. L., Meyer, J. S., and McKnight, D. M.: Photooxidation of wetland and riverine dissolved organic matter: Altered copper complexation and organic composition, Hydrobiologia, 579, 95–113, 2007.
Caplanne, S. and Laurion, I.: Effect of chromophoric dissolved organic matter on epilimnetic stratification in lakes, Aquat. Sci., 70, 123–133, 2008.
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Short summary
This study investigates how sunlight, dissolved organic matter (DOM) concentration and composition, and hydrology interact to control DOM degradation in headwater streams. In Imnavait Creek, a shallow, low-relief stream in the Arctic, DOM degradation by sunlight was limited by light under all conditions. Study results were used to synthesize controls on DOM degradation by sunlight for a river reach, expressed as a function of light attenuation and water residence times.
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