Soil oxygen affects denitrification



Rates of denitrification, the metabolic process by which bacteria produce nitrogen (N2) gas, are variable and difficult to measure in ecosystems. Burgin and Groffman sought to learn more about the influence of soil oxygen, which is not often measured, on the denitrification process in wetlands. They collected samples and measured soil oxygen concentration in a riparian zone in Millbrook, N. Y. The site included a wet zone close to a stream and a drier zone slightly farther from the stream.