三田市フラワータウンにおけるモウソウチク林の皆伐後の植生動態

抄録

Recently, range expansion of bamboo forests has been observed in various parts of western and eastern Japan, and this phenomena has become a very important problem for conservation of local ecosystems. It seems that the most certain method to prevent range expansion of bamboo forests is to convert the forests into other vegetation. Therefore, we studied the vegetation dynamics of the Phyllostachys pubescens forest after clear-cutting in Flower Town, Sanda, Hyogo Prefecture, in order to examine the effectiveness of clear-cutting for converting bamboo forests into other vegetation. Clear-cutting of the Phyllostachys pubescens forest was carried out on June and July, 1997. From September, 1997 to May, 1999, floristic composition and layer structure of the vegetation formed after clear-cutting was surveyed using the phytosociological method. The results showed that Phyllostachys pubescens declined remarkably due to clear-cutting. Zanthoxylum ailanthoides, Albizia julibrissin, Rhus javanica, Mallotus japonicus and so on, which were not found in the Phyllostachys pubescens forest ,appeared after clear-cutting .The vegetation formed after clear-cutting was identified as Rubo-Aralietum elatae Miyawaki et al. 1971. From the results, it is considered that clear-cutting is very effective in converting Phyllostachys pubescens forest into other vegetation.