Five years of simulated atmospheric nitrogen deposition have only subtle effects on the fate of newly synthesized carbon in Calluna vulgaris and Eriophorum vaginatum

► We investigated the effect of long term N deposition on carbon turnover in peatlands. ► Carbon fixation was enhanced in Eriophorum vaginatum under N deposition. ► Ecosystem respiration of the fixed C was enhanced over Calluna vulgaris stands. ► Below-ground effects were moderate. ► This may be due to effective N retention in the bryophyte layer.