Abstract
In Aldan, southeastern Siberia, located on the southern margin of the continuous permafrost zone, wildfires have occurred very frequently, and the fire cycle of this region is about 60 years, making it one of the shortest periods among the circumpolar ecosystems. Unlike the spruce-dominated taiga in North America and northern Europe, larch trees predominate in the Siberian taiga, with occasional occurrence of spruce forest. From the size structure of tree populations, spruce forest was estimated to be preceded by larch forest, indicating that the frequent occurrence of fire may prevent the ecological succession from larch to spruce, thus explaining the wide dominance of serai-stage larch forest in the Siberian taiga.
