Articles | Volume 27, issue 2
https://doi.org/10.5194/hess-27-613-2023
https://doi.org/10.5194/hess-27-613-2023
Research article
 | 
31 Jan 2023
Research article |  | 31 Jan 2023

Groundwater flow paths drive longitudinal patterns of stream dissolved organic carbon (DOC) concentrations in boreal landscapes

Anna Lupon, Stefan Willem Ploum, Jason Andrew Leach, Lenka Kuglerová, and Hjalmar Laudon

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Hydrology and riparian forests drive carbon and nitrogen supply and DOC : NO3 stoichiometry along a headwater Mediterranean stream
José L. J. Ledesma, Anna Lupon, Eugènia Martí, and Susana Bernal
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Cited articles

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Berggren, M., Laudon, H., Haei, M., Ström, L., and Jansson, M.: Efficient aquatic bacterial metabolism of dissolved low-molecular-weight compounds from terrestrial sources, ISME J., 4, 408–416, https://doi.org/10.1038/ismej.2009.120, 2009. 
Bernal, S., Lupon, A., Catalán, N., Castelar, S., and Martí, E.: Decoupling of dissolved organic matter patterns between stream and riparian groundwater in a headwater forested catchment, Hydrol. Earth Syst. Sci., 22, 1897–1910, https://doi.org/10.5194/hess-22-1897-2018, 2018. 
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Discrete riparian inflow points (DRIPs) transport dissolved organic carbon (DOC) from large areas to discrete sections of streams, yet the mechanisms by which DRIPs affect stream DOC concentration, cycling, and export are still unknown. Here, we tested four models that account for different hydrologic and biological representations to show that DRIPs generally reduce DOC exports by either diluting stream DOC (snowmelt period) or promoting aquatic metabolism (summer).
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