Biological Nitrogen Fixation and Nitrogen Accumulation in Peatlands

Peatlands cover about 3% of the Earth’s surface and are regarded as a vital carbon (C) pool sink. The formation peatland is supported by continuously supplied nitrogen (N) but sources this N remain unclear. Here, we first review stocks rate they accumulate in peatlands, then present N, especially through biological fixation (BNF). We found that global peatlands store 5.9–25.9 Gt N. In past millennia, northern have lower accumulated than tropical undisturbed peatlands. BNF approximately 1.9 ± 2.7 g m ?2 yr ?1 higher deposition, 0.5 0.4 . For observation has hardly been reported yet needs further investigation. This provides broad picture cycling suggests there large uncertainties, due to limited observations fluxes inflow outflow runoff. Therefore, call for more efforts contributing field modelling budget