There are some methods to investigate the roadside vegetation influenced by road construction. In this paper, we tried to study from some analytical approaches, using the number of existing species, floristic composition, indicator plants, life form spectrum and vegetation map. Surveyed area is Aokigahara natural forest at the foot of Mt. Fuji. The results are as follows. The influence by road construction in this area is indicated mainly by secondary plant community and its spacial arrangement, which is judged by vegetation map. As for the vegetational structure, it is recognized that well developed mantle community protects the roadside forest, and south side vegetation of the road recovers a little faster than north side vegetation. Vegetation zone influenced by road construction extends even at present (about 18 years since road construction) 10 m from roadside into forest, judging from floristic composition and life form spectrum.
道路周辺植生の群落構造的考察 : 青木ケ原国道139号における事例
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