Studies on the relationships between the stand floor vegetation, the trampling pressure, cutting bush, the area of stands, and environmental factors around the Quercus serrata stand in suburban area

Abstract

In Musashino tarrace in Tokyo, we investigated the relationships between stand floor vegetation of Quercus serrata stand, trampling pressure, cutting bush, area of stands, land use and population around the stands. Following results were obtained. 1) The stand floor vegetation of 55 investigated quadrates were divided into 6 types by the species composition. In the 2 types among thees 6, some woody plants or Pleioblastus chino var. chino grew thick in shrub layer. And another 2 types among the rest, the coverage, the species number of herb layer were the highest. At the other 2 types, the coverage and the species number of shrub and herb layer were the poorest. 2) The coverage and species number in the herb layer were poorer, and the soil herdness that indicates the trampling pressure was higher in the stands around which site were more urbanized. 3) The coverage of shrub layer was negatively correlated with the frepuency of cutting bush. 4) The influeces of the urbanization around the stands contribute to the conditions of stand floor vegetation more than those of cutting bush. And stand floor vegetation was poor in urbanized area such as ward area, Mitaka city, Musashino city.