Articles | Volume 17, issue 9
https://doi.org/10.5194/bg-17-2487-2020
https://doi.org/10.5194/bg-17-2487-2020
Research article
 | 
08 May 2020
Research article |  | 08 May 2020

Carbon dioxide dynamics in an agricultural headwater stream driven by hydrology and primary production

Marcus B. Wallin, Joachim Audet, Mike Peacock, Erik Sahlée, and Mattias Winterdahl

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Cited articles

Alberts, J. M., Beaulieu, J. J., and Buffam, I.: Watershed land use and seasonal variation constrain the influence of riparian canopy cover on stream ecosystem metabolism, Ecosystems, 20, 553–567, https://doi.org/10.1007/s10021-016-0040-9, 2017. 
Audet, J., Bastviken, D., Bundschuh, M., Buffam, I., Feckler, A., Klemedtsson, L., Laudon, H., Löfgren, S., Natchimuthu, S., Öquist, M., Peacock, M., and Wallin, M. B.: Forest streams are important sources for nitrous oxide emissions, Glob. Change Biol., 26, 629–641, https://doi.org/10.1111/gcb.14812, 2020. 
Bastviken, D., Sundgren, I., Natchimuthu, S., Reyier, H., and Gålfalk, M.: Technical Note: Cost-efficient approaches to measure carbon dioxide (CO2) fluxes and concentrations in terrestrial and aquatic environments using mini loggers, Biogeosciences, 12, 3849-3859. https://doi.org/10.5194/bg-12-3849-2015, 2015. 
Berggren, M., Laudon, H., and Jansson, M.: Hydrological control of organic carbon support for bacterial growth in boreal headwater streams, Microb. Ecol., 57, 170–178, https://doi.org/10.1007/s00248-008-9423-6, 2009. 
Bodmer, P., Heinz, M., Pusch, M., Singer, G., and Premke, K.: Carbon dynamics and their link to dissolved organic matter quality across contrasting stream ecosystems, Sci. Total Environ., 553, 574–586, https://doi.org/10.1016/j.scitotenv.2016.02.095, 2016. 
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Short summary
Here we show that small streams draining agricultural areas are potential hotspots for emissions of CO2 to the atmosphere. We further conclude that the variability in stream CO2 concentration over time is very high, caused by variations in both water discharge and primary production. Given the observed high levels of CO2 and its temporally variable nature, agricultural streams clearly need more attention in order to understand and incorporate these dynamics in large-scale extrapolations.
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