摘要：Similarly to drainage caused by land-use change, the predicted climate warming may cause a moderate water-level drawdown in northern peatlands due to increased evapotranspiration. This is likely to alter the frequency and severity of peatland fires. We surveyed the fire pattern in drainage-affected and unmanaged parts of a boreal raised bog using three sampling transects reaching from drainage-affected area to an unmanaged bog area. Throughout the bog, dry hummock surfaces provided spreading routes for fire while hollows remained intact. Drainage promoted succession that lead to the dominance of hummock vegetation close to the drained area. Consequently, drainage succession favoured fire. The results suggest an increase in fire impact as a consequence of lowered water levels. In warmer climate with increased evapotranspiration bogs are likely to become more vulnerable to fires.
