Articles | Volume 27, issue 21
https://doi.org/10.5194/hess-27-3935-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-27-3935-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
07 Nov 2023
Research article |
| 07 Nov 2023
| 07 Nov 2023
Hydrological connectivity controls dissolved organic carbon exports in a peatland-dominated boreal catchment stream
Centre de Recherche sur la Dynamique du Système Terre (GÉOTOP), Université du Québec à Montréal, Montréal, Quebec, Canada
Groupe de Recherche Inter-universitaire en Limnologie (GRIL), Université du Québec à Montréal, Montréal, Quebec, Canada
Institut des Sciences de l'Environnement (ISE), Université du Québec à Montréal, Montréal, Quebec, Canada
Laure Gandois
CORRESPONDING AUTHOR
Laboratoire Écologie Fonctionnelle et Environnement, UMR 5245, CNRS-UPS-INPT, Toulouse, France
Pierre Taillardat
Centre de Recherche sur la Dynamique du Système Terre (GÉOTOP), Université du Québec à Montréal, Montréal, Quebec, Canada
Groupe de Recherche Inter-universitaire en Limnologie (GRIL), Université du Québec à Montréal, Montréal, Quebec, Canada
NUS Environmental Research Institute, National University of Singapore, Singapore
Marc-André Bourgault
Département de Géographie, Université Laval, Québec, Quebec, Canada
Khawla Riahi
Centre Eau, Terre et Environnement, Institut National de la Recherche Scientifique, Québec, Quebec, Canada
Alex Ponçot
Centre de Recherche sur la Dynamique du Système Terre (GÉOTOP), Université du Québec à Montréal, Montréal, Quebec, Canada
Alain Tremblay
Programme Gaz à Effet de Serre, Hydro Québec, Montréal, Quebec, Canada
Michelle Garneau
Centre de Recherche sur la Dynamique du Système Terre (GÉOTOP), Université du Québec à Montréal, Montréal, Quebec, Canada
Groupe de Recherche Inter-universitaire en Limnologie (GRIL), Université du Québec à Montréal, Montréal, Quebec, Canada
Institut des Sciences de l'Environnement (ISE), Université du Québec à Montréal, Montréal, Quebec, Canada
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Pools are common features of peatlands. We documented dissolved organic matter (DOM) composition in pools and peat of an ombrotrophic boreal peatland to understand its origin and potential role in the peatland carbon budget. The survey reveals that DOM composition differs between pools and peat, although it is derived from the peat vegetation. We investigated which processes are involved and estimated that the contribution of carbon emissions from DOM processing in pools could be substantial.
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Short summary
The peatland dissolved organic carbon (DOC) lost through aquatic exports can offset a significant proportion of the ecosystem carbon balance. Hence, we propose a new approach to better estimate the DOC exports based on the specific contribution of a boreal peatland (Canada) during periods of high flow. In addition, we studied the relations between DOC concentrations and stream discharge in order to better understand the DOC export mechanisms under contrasted hydrometeorological conditions.
The peatland dissolved organic carbon (DOC) lost through aquatic exports can offset a...
