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Differential Controls of Greenhouse Gas (CO2, CH4, and N2O) Concentrations in Natural and Constructed Agricultural Waterbodies on the Northern Great Plains

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dc.contributor.authorJensen, Sydney
dc.contributor.authorWebb, Jackie
dc.contributor.authorSimpson, Gavin
dc.contributor.authorBaulch, Helen
dc.contributor.authorLeavitt, Peter
dc.contributor.authorFinlay, Kerri
dc.date.accessioned2023-08-09T19:02:34Z
dc.date.available2023-08-09T19:02:34Z
dc.date.issued2023
dc.descriptionPublished by American Geophysical Union (2023) © 2023. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en_US
dc.description.abstractInland waters are hotspots of greenhouse gas (GHG) cycling, with small water bodies particularly active in the production and consumption of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). However, wetland ponds are being replaced rapidly by small constructed reservoirs in agricultural regions, yet it is unclear whether these two water body types exhibit similar physical, chemical, and environmental controls of GHG content and fluxes. Here, we compared the content and regulatory mechanisms of all three major GHGs in 20 pairs of natural wetland ponds and constructed reservoirs in Canada's largest agricultural region. Carbon dioxide content was associated primarily with metabolic indicators in both water body types; however, primary production was paramount in reservoirs, and heterotrophic metabolism a stronger correlate in wetland ponds. Methane concentrations were correlated positively with eutrophication of the reservoirs alone, while competitive inhibition by sulfur-reducing bacteria may have limited CH4 in both waterbody types. Contrary to expectations, N2O was undersaturated in both water body types, with wetlands being a significantly stronger and more widespread N2O sink. Varying regulatory processes are attributed to differences in age, depth, morphology, and water-column circulation between water body types. These results suggest that natural and constructed water bodies should be modeled separately in regional GHG budgets.en_US
dc.description.sponsorshipGovernment of Saskatchewan (Award 200160015), Natural Sciences and Engineering Research Council of Canada Discovery grants (to K.F., G.L.S., H.M.B., and P.R.L.), the Canada Foundation for Innovation, University of Reginaen_US
dc.description.versionPeer Revieweden_US
dc.identifier.citationJensen, S. A., Webb, J. R., Simpson, G. L., Baulch, H. M., Leavitt, P. R., & Finlay, K. (2023). Differential controls of greenhouse gas (CO2, CH4, and N2O) concentrations in natural and constructed agricultural waterbodies on the Northern Great Plains. Journal of Geophysical Research: Biogeosciences, 128, e2022JG007261. https://doi. org/10.1029/2022JG007261en_US
dc.identifier.doi10.1029/2022JG007261
dc.identifier.urihttps://hdl.handle.net/10388/14868
dc.language.isoenen_US
dc.publisherAmerican Geophysical Union (Client Organisation), Wiley (Commercial Publisher)en_US
dc.rightsAttribution 2.5 Canada*
dc.rights.urihttp://creativecommons.org/licenses/by/2.5/ca/*
dc.subjectgreenhouse gasen_US
dc.subjectwetland pondsen_US
dc.subjecteutrophicationen_US
dc.subjectwater-column circulationen_US
dc.titleDifferential Controls of Greenhouse Gas (CO2, CH4, and N2O) Concentrations in Natural and Constructed Agricultural Waterbodies on the Northern Great Plainsen_US
dc.typeArticleen_US

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