Seasonal variability of CO 2, CH 4 , and N2 O content and fluxes in small agricultural reservoirs of the northern Great Plains.

Simple item page
dc.contributor.authorJensen, Sydney A.
dc.contributor.authorWebb, Jackie R.
dc.contributor.authorSimpson, Gavin L.
dc.contributor.authorBaulch, Helen M.
dc.contributor.authorLeavitt, Peter R.
dc.date.accessioned2023-04-26T16:09:02Z
dc.date.available2023-04-26T16:09:02Z
dc.date.issued2022-10-03
dc.description© 2022 Jensen, Webb, Simpson, Baulch, Leavitt and Finlay. This is an open- access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.en_US
dc.description.abstractInland waters are important global sources, and occasional sinks, of CO 2 , CH 4, and N 2 O to the atmosphere, but relatively little is known about the contribution of GHGs of constructed waterbodies, particularly small sites in agricultural regions that receive large amounts of nutrients (carbon, nitrogen, phosphorus). Here, we quantify the magnitude and controls of diffusive CO 2 , CH4 , and N 2 O fluxes from 20 agricultural reservoirs on seasonal and diel timescales. All gases exhibited consistent seasonal trends, with CO 2 concentrations highest in spring and fall and lowest in mid-summer, CH 4 highest in mid-summer, and N 2 O elevated in spring following ice-off. No discernible diel trends were observed for GHG content. Analyses of GHG covariance with potential regulatory factors were conducted using generalized additive models (GAMs) that revealed CO 2 concentrations were affected primarily by factors related to benthic respiration, including dissolved oxygen (DO), dissolved inorganic nitrogen (DIN), dissolved organic carbon (DOC), stratification strength, and water source (as δ18 O water ). In contrast, variation in CH 4 content was correlated positively with factors that favoured methanogenesis, and so varied inversely with DO, soluble reactive phosphorus (SRP), and conductivity (a proxy for sulfate content), and positively with DIN, DOC, and temperature. Finally, N 2 O concentrations were driven mainly by variation in reservoir mixing (as buoyancy frequency), and were correlated positively with DO, SRP, and DIN levels and negatively with pH and stratification strength. Estimates of mean CO 2 -eq flux during the open-water period ranged from 5,520 mmol m−2 year 1 (using GAM- predictions) to 10,445 mmol m−2 year−1 (using interpolations of seasonal data) reflecting how extreme values were extrapolated, with true annual flux rates likely falling between these two estimates.en_US
dc.description.authorstatusFacultyen_US
dc.description.peerreviewyesen_US
dc.description.sponsorshipFinancial 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 KF, GS, HB, and PL), the Canada Foundation for Innovation (Award RGPIN–2018- 0490), University of Regina.en_US
dc.identifier.citationJensen SA, Webb JR, Simpson GL, Baulch HM, Leavitt PR and Finlay K (2022), Seasonal variability of CO 2, CH 4 , and N2 O content and fluxes in small agricultural reservoirs of the northern Great Plains. Front. Environ. Sci. 10:895531. doi: 10.3389/fenvs.2022.895531en_US
dc.identifier.doidoi: 10.3389/fenvs.2022.895531
dc.identifier.urihttps://hdl.handle.net/10294/15875
dc.language.isoenen_US
dc.publisherFrontiers Mediaen_US
dc.rightsAttribution 4.0 International*
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/*
dc.subjectagricultural ponden_US
dc.subjectseasonalityen_US
dc.subjectgreenhouse gas fluxesen_US
dc.subjectCO 2 equivalent (CO2-eq)en_US
dc.subjectmethaneen_US
dc.subjectnitrous oxideen_US
dc.subjectcarbon dioxideen_US
dc.titleSeasonal variability of CO 2, CH 4 , and N2 O content and fluxes in small agricultural reservoirs of the northern Great Plains.en_US
dc.typeArticleen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
fenvs-10-895531.pdf
Size:
3.54 MB
Format:
Adobe Portable Document Format
Description:
Published version (PDF)
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Peter Leavitt