Articles | Volume 19, issue 18
https://doi.org/10.5194/bg-19-4571-2022
https://doi.org/10.5194/bg-19-4571-2022
Research article
 | 
22 Sep 2022
Research article |  | 22 Sep 2022

Dissolved organic matter concentration and composition discontinuity at the peat–pool interface in a boreal peatland

Antonin Prijac, Laure Gandois, Laurent Jeanneau, Pierre Taillardat, and Michelle Garneau

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Revised manuscript accepted for HESS
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Cited articles

Arsenault, J., Talbot, J., and Moore, T. R.: Environmental controls of C, N and P biogeochemistry in peatland pools, Sci. Total Environ., 631–632, 714–722, https://doi.org/10.1016/j.scitotenv.2018.03.064, 2018. 
Arsenault, J., Talbot, J., Moore, T. R., Beauvais, M., Franssen, J., and Roulet, N. T.: The Spatial Heterogeneity of Vegetation, Hydrology and Water Chemistry in a Peatland with Open-Water Pools, Ecosystems, 22, 1352–1367, https://doi.org/10.1007/s10021-019-00342-4, 2019. 
Austnes, K., Evans, C. D., Eliot-Laize, C., Naden, P. S., and Old, G. H.: Effects of storm events on mobilisation and in-stream processing of dissolved organic matter (DOM) in a Welsh peatland catchment, Biogeochemistry, 99, 157–173, https://doi.org/10.1007/s10533-009-9399-4, 2010. 
Autio, I., Soinne, H., Helin, J., Asmala, E., and Hoikkala, L.: Effect of catchment land use and soil type on the concentration, quality, and bacterial degradation of riverine dissolved organic matter, Ambio, 45, 331–349, https://doi.org/10.1007/s13280-015-0724-y, 2016. 
Banaœ, K.: The hydrochemistry of peatland lakes as a result of the morphological characteristics of their basins, Oceanol. Hydrobiol. Stud., 42, 28–39, https://doi.org/10.2478/s13545-013-0057-z, 2013. 
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Short summary
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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