2023
DOI: 10.5194/hess-27-213-2023
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Water level variation at a beaver pond significantly impacts net CO2 uptake of a continental bog

Abstract: Abstract. The carbon (C) dynamics of northern peatlands are sensitive to hydrological changes owing to ecohydrological feedbacks. We quantified and evaluated the impact of water level variations in a beaver pond (BP) on the CO2 flux dynamics of an adjacent, raised Sphagnum–shrub-dominated bog in southern Canada. We applied the CoupModel to the Mer Bleue bog, where the hydrological, energy and CO2 fluxes have been measured continuously for over 20 years. The lateral flow of water from the bog to the BP was esti… Show more

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Cited by 10 publications
(2 citation statements)
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“…This could lead to more frequent low water tables and water deficits, which in turn may reduce net C uptake (Zhong et al, 2020;Kwon et al, 2022). The effect of low water tables on the C balance has previously been observed at Mer Bleue, where lowering of water levels at a beaver pond near the EC site caused a decrease in C uptake; further modelling also predicted that a beaver pond water table below ∼ 1.7 m would cause Mer Bleue to switch from a C sink to a source (He et al, 2023). Similar impacts were observed at Kopuatai during a severe drought in 2013, where monthly total ecosystem respiration increased in response to a slightly deeper water table, leading to a small reduction in the net annual C balance (Goodrich et al, 2017).…”
Section: Implications For Future Peatland Water Balancesmentioning
confidence: 78%
“…This could lead to more frequent low water tables and water deficits, which in turn may reduce net C uptake (Zhong et al, 2020;Kwon et al, 2022). The effect of low water tables on the C balance has previously been observed at Mer Bleue, where lowering of water levels at a beaver pond near the EC site caused a decrease in C uptake; further modelling also predicted that a beaver pond water table below ∼ 1.7 m would cause Mer Bleue to switch from a C sink to a source (He et al, 2023). Similar impacts were observed at Kopuatai during a severe drought in 2013, where monthly total ecosystem respiration increased in response to a slightly deeper water table, leading to a small reduction in the net annual C balance (Goodrich et al, 2017).…”
Section: Implications For Future Peatland Water Balancesmentioning
confidence: 78%
“…For example, several papers have produced numerical models specifically to capture dynamics in hummock-hollow patterning (e.g., Couwenberg, 2005;Nungesser, 2003;Eppinga et al, 2009;Heffernan et al, 2013;Kaplan et al, 2012); meanwhile, ecosys can spatially simulate this feature as well as including general ecosystem processes. Additionally, CoupModel can simultaneously simulate WTD and carbon dioxide fluxes in 1-D (e.g., Kasimir et al, 2018;He et al, 2023aHe et al, /2023b; ecosys shares this capability in addition to lateral flow capabilities in multiple dimensions.…”
Section: Ecosys and Coupmodel: Coupled Fully Detailed Modelsmentioning
confidence: 99%