摘要：Only little is known about the long-term carbon dynamics related to peatland restoration. We studied CO2 and CH4 dynamics of spontaneously regenerated peat trenches five decades after peat harvesting had ceased. We used non-linear regression models and interpolation for simulating gas exchange of four regenerating plant communities during two growing seasons and one winter. The studied communities all acted as seasonal (June–September) sinks of CO2 between 14 and 118 g C m–2, while the emissions of CH4 ranged from –4.9 to –28.8 g C m–2. When the winter time losses of carbon and the estimated leaching were subtracted, the balance was very low or negative: between –67 and 31 g C m–2. The low or even negative annual carbon balance in all communities may suggest a decrease in carbon sink strength in the advanced regeneration after the previously observed strong sink in the first regeneration stages caused by mass colonization by Eriophorum.
