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 A.
dc.date.accessioned2023-05-30T19:32:26Z
dc.date.available2023-05-30T19:32:26Z
dc.date.issued2023-04-18
dc.description© 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 (CO 2), 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 CH 4 in both waterbody types. Contrary to expectations, N 2O was undersaturated in both water body types, with wetlands being a significantly stronger and more widespread N 2O 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.authorstatusFacultyen_US
dc.description.peerreviewyesen_US
dc.description.sponsorshipAcknowledgments Financial support for data collection and analyses were provided in part by Government 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 Founda- tion for Innovation, University of Regina.en_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 N 2O) 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.doihttps://doi. org/10.1029/2022JG007261
dc.identifier.urihttps://hdl.handle.net/10294/15945
dc.language.isoenen_US
dc.publisherWiley-Blackwellen_US
dc.rightsAttribution 4.0 International*
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/*
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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