Figure 7.   Elemental fluxes resulting from coupled nitrification-denitrification (determined stoichiometrically from N2 flux) in salt marsh creek sediments. The slope of the line indicates the proportion of the cycling of that element resulting from coupled nitrification-denitrification. An average of 46% of mineralized N is denitrified within the sediments. O2 and CO2 fluxes due to autochthonous denitrification account for 18% and 10%, respectively of the total metabolism.