Submitted to: Eastern Oregon Agricultural Research Center
Publication Type: Experiment Station
Publication Acceptance Date: January 15, 1998
Publication Date: June 15, 1998
Citation: ANGELL,R.F., SVEJCAR,A.J., MEASURING CARBON DIOXIDE FLUX ON SAGEBRUSH RANGE: PRELIMINARY RESULTS, EASTERN OREGON AGRICULTURAL RESEARCH CENTER, 1998, PP. 45 - 48. Interpretive Summary: The subject of carbon flux on how much CO2 a plant community stores or releases has received considerable attention in recent years. Carbon flux measurements are important in gaining an understanding of how vegetation impacts the global carbon cycle and thus atmospheric CO2. Measurements of carbon flux should also provide an index of site productivity. We used a ¿Bowen-ratio¿ unit to measure carbon fluxes over a sagebrush steppe community during a three-year period. There is a flush of CO2 uptake during May and June when soil moisture is adequate and the soils warm. There can be large (100%) year-to-year variation in CO2 uptake even during years with similar rainfall. Our initial results suggest that the sagebrush steppe is a net ¿sink¿ for atmospheric CO2, i.e., more CO2 is stored than is released.