<b>Nitrogen dynamics in </b><b>arctic</b><b> riparian </b><b>soil</b><b>s characterized by low organic matter content but high N bioavailability</b>

We investigated the spatial variability in soil concentration of N species and transformation processes in riparian soils of two pristine arctic rivers located in Finland and Greenland. We combined measurements of <i>in</i><i>-</i><i>situ</i> nitrous oxide (N₂O) fluxes and N₂O production in soil incubations with ¹⁵N labeling techniques that quantify gross N mineralization and nitrification, the potential for N₂O production by denitrification, and the potential rate of dissimilatory nitrate reduction to ammonium (DNRA).