Recent reviews indicate that N deposition increases soil organic matter ( SOM ) storage in forests but the undelying processes are poorly understood. Our aim was to quantify the impacts of increased N inputs on soil C fluxes such as C mineralization and leaching of dissolved organic carbon ( DOC ) from different litter materials and native SOM . We added 5.5 g N m −2 yr −1 as NH 4 NO 3 over 1 year to two beech forest stands on...

Historical photographs document that during the last century, forests have expanded upwards by 60–80 m into former tundra of the pristine Ural mountains. We assessed how the shift of the high‐altitude treeline ecotone might affect soil organic matter (SOM) dynamics. On the gentle slopes of Mali Iremel in the Southern Urals, we (1) determined the differences in SOM stocks and properties from the tundra at 1360 m above sea level...