There is a necessity to clarify the present ecological situation of the abandoned Satoyama-forest in northern Kyushu that has been loosing the bio-diversity and its qualities as a fine seasonal landscape. We analyzed a time series of aerial photographs and surveyed the forest structure. Interviews were also conducted with elderly local residents. The results are as follows: 1) Broad-leaved evergreen trees such as Castartopsis cuspidata var. sieboldii and Machilus thunbergii dominantly covered every forest canopy, and except for Zanthoxylum ailanthoides, broad-leaved deciduous trees could rarely be seen. 2) The 15-year regenerative stage of the forest has a higher tree stand density of Z.ailanthoides, than the 30-year staged forest. Despite this the 30-year regenerative stage of the forest has a higher canopy of trees and DBH than the 15-year staged forest. 3) The 40-year stage forest showed gaps in the canopy, and more species are accounted for compared with the 15-year stage forest. However, since trees were shade-tolerant species, there is considered to be a necessity for forest management procedures such as thinning and branching.
|Regenerative Staging and the Structure of the Over Matured Satoyama-forest in Suburban Kitakyushu City of Southwestern Japan(PAPERS OF THE 21th SCIENTIFIC RESEARCH MEETING)
|ランドスケープ研究 : 日本造園学会誌 : journal of the Japanese Institute of Landscape Architecture
|出版済み - 3月 31 2003