2019 Fiscal Year Final Research Report

Autonomous degradation of tropical forests

Research Project

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Project/Area Number	17K07567
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Ecology/Environment
Research Institution	Hiroshima University
Principal Investigator	Yamada Toshihiro 広島大学, 統合生命科学研究科(総), 教授 (50316189)
Project Period (FY)	2017-04-01 – 2020-03-31
Keywords	熱帯雨林
Outline of Final Research Achievements	In this study, I aimed the following three items; (1) the recognition of the root cause hindering the regeneration of tropical rain forests, which is an autonomous threat to the destruction and deterioration of tropical forests, (2) the clarification of the changes in the social and economic structures of the people who surround tropical forests that are leading to the problem, and (3) the generalization of this threat structure to design and propose a coping method for the autonomous deterioration of tropical forest. Field surveys during the research period clarified that the changes in the social and economic structure of humans are causing the increases in wild boar populations, and in turn it leads to the degradation of a tropical rain forest.
Free Research Field	植物生態学
Academic Significance and Societal Importance of the Research Achievements	本研究が明らかにした、マレーシアの山村域の過疎・高齢化は、マレーシアをはじめとした熱帯林をもつ途上国が共通して抱える問題である。パソ保護林で起きている社会・経済構造変化に起因するケモノ（イノシシ）による熱帯林の更新阻害問題は、今後、世界中のどこで発生してもおかしくないということである。その歴史の特異性から当問題がいち早く発生したパソ保護林を調べることで、今後、世界中のどこでも起こり得る熱帯林のケモノによる自律的な破壊・劣化の問題を認知することが、この問題による森林劣化を回避するために必須である。