隣接する土地被覆別にみた竹林分布変化の特徴

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タイトル別名
  • Characteristic of Temporal Range Shifts of Bamboo Stands according to Adjacent Landcover Type.
  • リンセツ スル トチ ヒフク ベツ ニ ミタ チクリン ブンプ ヘンカ ノ トクチョウ

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Multi-temporal aerial photos were processed into digital orthophotos to examine temporal range shifts of bamboo stands in relation to adjacent landcover. In both study areas, in Sasaguri and Tachibana, in Fukuoka Prefecture, Japan, the area of bamboo stands increased 1.3 to 1.7 times over about 30 years. Broadleaved forest occupied at least 40% of the area into which bamboo expanded. Areas of reduction of bamboo stands were also identified; the major cause was land alteration by humans. The bamboo invasion ratio was calculated as the ratio of the length of the adjacent edge initially to that after expansion in both study areas. The highest value was for grassy sites, followed by broadleaved forest. The bamboo front moved at about 1.11.6 m annually, and no difference among landcover types was found.

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