XVI International Botanical Congess

Sasa covering the forest floor is popular and characteristic in Eastern Asia. The chance for trees to regenerate successfully must be only when the Sasa synchronously dies after flowering. We researched the fate of seeds and saplings for tree species in a cool temperate deciduous forest, where a part of Sasa had just died. Light density at ground surface attenuated according to the density of Sasa above, and both of them correlated with not only the seedling survival but also the emergence. Quercus acorns were transported immediately and dead by feeding in the Sasa-covered area. Seeds in the Sasa-removed area were very often drawn into the Sasa-covered area. To estimate regeneration of trees, we must consider both time and spatial pattern of Sasa's life, since they should strongly influence the activity of mice.