2023 Volume 28 Issue 1-2 Pages 35-48
The Northern Goshawk (Accipiter gentilis), is listed as a near threatened (NT) species on the red lists by the Ministry of Environment of Japan, and its conservation is important as a flagship species of Satoyama landscape. It has been proposed that red pine (Pinus densiflora) artificial forests be managed over the long term by regeneration as a habitat for goshawks, but there are few practical examples in Japan. In this study, the authors examined a long-term regeneration plan while maintaining an environment in which goshawks can nest, using the "Tottori Prefectural Daisen Goshawk Forest", in the 49th to 75th grade, as a case study site. Also, pine wood under the brand name "Daisen-Matsu" has traditionally been produced in this area, but in recent years it has declined. First, based on ortho mosaic images, a vegetation map was created. Next, the arrangement of the cutting zone by the square reserve model simplified by discarding the reality, the long-term operation plans which always secured nestable forest were examined. As a result, nestable forest reserves of 1 block group (about 16ha) could be secured 60 or 70 years later, and it was considered possible to formulate a long-term regeneration plan by the re-foresing group of small area clearcutting. Then, implementation plans based on the local shape and area were examined. The examination pattern was a total of 8 patterns based on the combination of land ownership, buffer zone width, and actual vegetation. As a result, seven groups of reforeting groups were set, and the optimal solution was the largest update reforest planning area, and the examination pattern 1 that the area of the continuous forest can be maintained for a longer period. Through this study, the specific examination procedure for drafting a long-term regeneration plan for red pine artificial forests aiming at balancing forestry with the habitat conservation of Northern Goshawk was clarified. Also, this regeneration plan was partially implemented, and pine wood was shipped, contributing to the maintenance of Daisen matsu's brand materials.
