Hierarchically structured approach for restoring natural forest—trial in Tokushima Prefecture, Shikoku, Japan

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説明

Restoration should be a part of an overall strategy for national, regional and local land management, rather than an independent action. A hierarchically structured approach for restoration is examined by introducing actual policy and work for reestablishment of natural forest in Tokushima Prefecture, Shikoku, Japan. The goal set by Tokushima Prefectural Government is to increase the quality of biotope for indigenous plants and animals through increasing the area of natural and semi-natural vegetation and their connectivity. A “networking map” indicating high priority areas to be conserved or to be restored has been produced, using Natural Environment GIS provided by the Ministry of Environment of Japan. Having the estimated distribution of natural forests is helpful for selecting the targets for restoration, because natural forests have already disappeared from most regions due to land development. For reforestation at the cutover site, a method for designing work was developed. In order to select species and plan planting zones, ecotope types were identified both in natural forest as a reference and at the cutover site. A system for supplying indigenous seedlings was established.

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