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Biogeochemical Distinctiveness of Peatland Ponds, Thermokarst Waterbodies, and Lakes

Biogeochemical Distinctiveness of Peatland Ponds, Thermokarst Waterbodies, and Lakes

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ARSENAULT, Julien, Julie TALBOT, Lee E. BROWN, Joseph HOLDEN, Karla MARTÍNEZ-CRUZ, Armando SEPULVEDA‐JAUREGUI, Graeme T. SWINDLES, Maxime WAUTHY, Jean‐François LAPIERRE, 2022. Biogeochemical Distinctiveness of Peatland Ponds, Thermokarst Waterbodies, and Lakes. In: Geophysical Research Letters. American Geophysical Union (AGU). 49(11), e2021GL097492. ISSN 0094-8276. eISSN 1944-8007. Available under: doi: 10.1029/2021GL097492

@article{Arsenault2022Bioge-57909, title={Biogeochemical Distinctiveness of Peatland Ponds, Thermokarst Waterbodies, and Lakes}, year={2022}, doi={10.1029/2021GL097492}, number={11}, volume={49}, issn={0094-8276}, journal={Geophysical Research Letters}, author={Arsenault, Julien and Talbot, Julie and Brown, Lee E. and Holden, Joseph and Martínez-Cruz, Karla and Sepulveda‐Jauregui, Armando and Swindles, Graeme T. and Wauthy, Maxime and Lapierre, Jean‐François}, note={Article Number: e2021GL097492} }

Arsenault, Julien 2022-07-01T09:13:31Z Martínez-Cruz, Karla Wauthy, Maxime Holden, Joseph Lapierre, Jean‐François Swindles, Graeme T. Swindles, Graeme T. Biogeochemical Distinctiveness of Peatland Ponds, Thermokarst Waterbodies, and Lakes Holden, Joseph eng Sepulveda‐Jauregui, Armando Brown, Lee E. Talbot, Julie 2022 Lapierre, Jean‐François Small lentic freshwater ecosystems play a disproportionate role in global biogeochemical cycles by processing large amounts of carbon (C), nitrogen (N), and phosphorus (P), but it is unlikely that they behave as one homogenous group for the purpose of extrapolation. Here, we synthesize biogeochemical data from >12,000 geographically distinct freshwater systems: lakes, peatland ponds, and thermokarst waterbodies. We show that peatland ponds are biogeochemically distinct from the more widely studied lake systems, while thermokarst waterbodies share characteristics with peatland ponds, lakes, or both. For any given size or depth, peatland ponds tend to have dissolved organic carbon concentrations several-fold higher and are 100-fold more acidic than lakes because of the organic matter-rich settings in which they develop. The biogeochemical distinctiveness of freshwater ecosystems highlights the need to account for the fundamental differences in sources and processing of organic matter to understand and predict their role in global biogeochemical cycles. 2022-07-01T09:13:31Z Brown, Lee E. Martínez-Cruz, Karla Talbot, Julie Sepulveda‐Jauregui, Armando Arsenault, Julien Wauthy, Maxime

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