2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2019 | 3:00 PM - 3:15 PM | FLOODS INCREASE CARBON DIOXIDE AND METHANE FLUXES AND CONCENTRATIONS IN SOUTHERN WISCONSIN AGRICULTURAL STREAMS | 250 AB
FLOODS INCREASE CARBON DIOXIDE AND METHANE FLUXES AND CONCENTRATIONS IN SOUTHERN WISCONSIN AGRICULTURAL STREAMS
Streams are often sources of carbon dioxide (CO2) and methane (CH4), particularly in agricultural regions where sediment and organic matter inputs can be substantial. Floods are occurring more often and more intensely in southern Wisconsin, one such agricultural region, due to climate change and few studies have investigated how floods impact stream CO2 and CH4 fluxes and concentrations. We compared concentrations and fluxes of CO2 and CH4 with >30 variables representing in-stream and watershed attributes at 10 sites in mixed agricultural and suburban locations in southern Wisconsin. Floods were often stimuli of CO2 and CH4 fluxes and concentrations. These increases were associated with greater water velocity as well as suspended organic matter. Our results indicate that floods may not always be a disturbance in streams, especially regarding greenhouse gas fluxes and concentrations, and that the increase in floods due to climate change may increase greenhouse gas emissions from streams.
- Biogeochemistry
- Flood
- Disturbance
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Presenters/Authors
Sam Blackburn
(), University of Wisconsin - Madison, srblackburn@wisc.edu;
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Emily Stanley
(), University of Wisconsin - Madison, ehstanley@wisc.edu;
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