No abstract

One's thought go to "the wisdom of ancestors who took advantage of ecosystem services"through the excursion of Nagara-gawa river, Gujo Hachiman and Kokeizan district

摘要：徳島県の海岸マツ林において，小型無人航空機(UAV)から取得した画像をもとに Structure from Motion(SfM)を用いて 林冠高モデルを作成し，マツ林の持続的管理にとって重要な林床の光環境を表す指数の推定を試みた。現地調査で取得した全天写真 から求めた開空度が，UAV データから高い精度で推定された。特に，開空度が 30 %を超えるプロットの多くではサイズの大きなギ ャップが抽出され，マツの生育に適した明るい場所が抽出可能であることが示唆された。 キーワード：海岸林，クロマツ，リモートセンシング，林冠高モデル，SfM，開空度 SASAKI, Takeshi, NIWA, Hideyuki, ASANAMI, Fumika, KAMADA, Mahito: Estimation of floor light conditions of a coastal pine forest using small Unmanned Aerial Vehicle.Abstract: In a coastal pine forest in Tokushima prefecture, we created a canopy height model from Unmanned Aerial Vehicle (UAV) data using Structure from Motion (SfM), and estimated an index representing forest floor light condition for sustainable pine forest management. The canopy openness was estimated with high accuracies. Large size gaps were extracted in the most plots which have canopy openness larger than 30 %, and it implied that it is possible to extract areas having light conditions suitable for the growth of pine trees.

We studied the social system to maintain collaborative activities for restoring and conserving coastal pine forests in Karatsu City, Saga Prefecture, Kyushu, Japan. Governance has been structured and functioned in most conservation processes; administrative offices of the state, prefecture, and city, business sector, and Civil Society Organization have acted interdependently, and network members have continuous interaction under the management of an NPO group known as KANNE. KANNE has filled in a structural hole in the social network. KANNE plays a special role as the hub. Social ties, however, are very weak, and hence the system continuity is fragile. If KANNE stops its work, the network structure will collapse. As an internal circumstance of KANNE, most management works have been governed by the secretary-general, and any person who can act as a substitute is now absent. Installing a system to develop human resources within KANNE is important to retain conservation activities.