Spatial variation of local stand structure in an Abies forest, 45 years after a large disturbance by the Isewan typhoon

摘要: Heterogeneity of forest stand structure often results from repeated small disturbances, but structural variation also arises in a that has regenerated after single large stand-replacing disturbance. We explored the within subalpine Abies Japan typhoon 1959. In 2004, four 50 × m plots were established at two sites forest. To characterize local each plot, we determined stem density, basal area, mean diameter breast height (DBH), and coefficient (CV) DBH 10 subplots. analyzed spatial distribution pattern trees subplot using L(t) function categorized distributions as clumped or non-clumped. The analysis revealed marked among subplots stand’s characteristics. Although patterns all clumped, 11 one site 39 other Subplots with generally had smaller DBH, greater CV than same density non-clumped pattern. These illustrated heterogeneity can arise experienced disturbance, probably because different densities saplings surviving disturbance growth dynamics result.