RESULTS
The relationship between the number of network lines and distance of vegetation patches is
shown in the ranking map for the networks (Figure 6). A large area of vegetation patches did not
always contain numerous network lines. In landscape ecological point of view, the vegetation
patches that cover more than 20ha and consist of 10 network lines were defined as the source
habitat in this study. Hence the vegetation patches as source habitat were selected according to this
definition. Two clusters of vegetation patches fulfilling the above criteria were recognized as source
habitat (Figure 7). These habitats were evaluated as vegetation patch to be preserved, and it was
considered that these habitats needed to be preserved for future and their habitat was necessary to be
improved from now onwards.