EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/21/2018 | 9:45 AM - 10:00 AM | FLOW REGIME INFLUENCES ON CARBON DIOXIDE AND METHANE FLUXES AND SOURCES IN FORESTED OZARK STREAMS | 330 B
FLOW REGIME INFLUENCES ON CARBON DIOXIDE AND METHANE FLUXES AND SOURCES IN FORESTED OZARK STREAMS
A growing body of work has provided estimates of stream contributions to carbon dioxide (CO2) and methane (CH4) dynamics across the United States. However, few studies have addressed the impact of flow regime on CO2 and CH4 fluxes. We determined summer daily CO2 and CH4 flux rates, carbon gas sources, and instream factors related to carbon gas flux rates in six forested streams within the two dominant natural flow regimes in northern Arkansas, runoff flashy and groundwater flashy systems. Flow types differed primarily in water source, intermittency, and ecoregion. We found that daily CO2 and CH4 fluxes did not differ significantly between flow regimes (CO2: p= 0.19, CH4: p= 0.27) , though both fluxes tended to be greater and more variable across streams at groundwater sites. Riparian soil respiration was the primary source of instream CO2 across all streams (dCO2= -17.6 to -22.0). CH4 in runoff streams streams originated from natural gas (dCH4= -38.8 to -43.7), while both thermogenic and biogenic CH4 were found in groundwater streams (dCH4= -32.5 to -50.0). Our work suggests that flow regime is likely an important player in stream carbon sources and fluxes.
- Carbon
- Flow
- Ecosystem
Presentation:
This presentation has not yet been uploaded.
Handouts:
Handout is not Available
Transcripts:
CART transcripts are NOT YET available, but will be posted shortly after the conference
Presenters/Authors
Allyn Dodd
(), Lyon College, allyn.dodd@lyon.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Erik Pollock
(), University of Arkansas, epolloc@uark.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Daniel Magoulick
(), Arkansas Cooperative Fish and Wildlife Research Unit, University of Arkansas, danmag@uark.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Michelle Evans-White
(), University of Arkansas, mevanswh@uark.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -