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Organization for Promotion of Research and Industry-Academic Regional Collaboration Institute for Tenure Track Promotion |
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Associate Professor |
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External Link |
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Related SDGs |
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TOKUMOTO Yuji
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Research Areas 【 display / non-display 】
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Environmental Science/Agriculture Science / Conservation of biological resources
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Life Science / Ecology and environment
Papers 【 display / non-display 】
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Variations in soil compositions and fungal communities are linked to tree composition and understory management Reviewed
Yuji Tokumoto, Souta Okuyama, Koki Sueyoshi, Harunobu Tanigawa, Rui Ren, Wakana A. Azuma
Landscape and Ecological Engineering 2026.1
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Pieris japonica (Ericaceae) Dominance and Increased Organic Horizon Inhibit Plant Establishment in Forests Altered by Deer Grazing Reviewed
Yuji Tokumoto, Ayumi Katayama
Ecological Research 2026.1
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Yuji Tokumoto, Yoshio Kijidani
Journal of Forest Research 30 ( 5 ) 385 - 392 2025
Authorship：Lead author, Corresponding author Publishing type：Research paper (scientific journal)
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Hayato Abe, Dongchuan Fu, Tadamichi Sato, Yuji Tokumoto, Fujio Hyodo, Ayumi Katayama
Journal of Environmental Management 371 123146 - 123146 2024.11
Language：English Publishing type：Research paper (scientific journal)
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Tokumoto Yuji, Sakurai Yuki, Abe Hayato, Katayama Ayumi
Forest Ecology and Management 564 121993 - 121993 2024.7
Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier BV
The increasing deer population has significantly altered the forest ecosystems. Deer browsing affects not only plant species diversity and composition but also other organisms indirectly, along with soil properties. However, the effects of deer grazing on the soil microbial community and the underlying mechanisms have not been well understood. To assess these effects, we compared the understory environment and soil microbial community inside and outside fences at Mt. Shiraga, where severe soil environmental degradation has occurred due to sika deer grazing. We selected 20 Fagus trees inhabiting areas within and outside the fences with similar topological features. Eleven environmental variables and both soil prokaryotic and fungal communities were compared between samples inside and outside the fences. The area inside the fence had significantly higher dwarf bamboo density and soil carbon (C) and nitrogen (N) content, whereas soils outside the fences had higher pH and bulk density. The diversity index of the fungal community, in terms of the number of amplicon sequence variants, inside the fence was higher than that outside, whereas that of the prokaryotic community did not differ between fences. Both prokaryotic and fungal communities differed between inside and outside fences. The prokaryotic community changed with the soil C/N ratio, and the relative abundance of oligotrophic bacteria increased with decreasing soil C/N ratio. The fungal community also changed with soil pH and dwarf bamboo density, with the relative abundances of symbiotrophic fungi and ectomycorrhizae increasing with increasing soil pH. Comparative analyses between inside and outside fence samples might provide information on soil microbial community changes with the changes in soil properties after deer grazing.
MISC 【 display / non-display 】
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Response of beech growth, soil microbial communities, and soil function to deer exclusion: example in Mt. Shiraga, Kumamoto
阿部隼人, 徳本雄史, 古賀みこと, 兵藤不二夫, 菱拓雄, 佐藤忠道, FU Dongchuan, 片山歩美
日本生態学会大会講演要旨(Web) 72nd 2025
Publishing type：Rapid communication, short report, research note, etc. (scientific journal)
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Dominance effect of unpalatable plants in deer-grazed forest: a case study of Pieris japonica
徳本雄史, 片山歩美
日本生態学会大会講演要旨(Web) 72nd 2025
Publishing type：Rapid communication, short report, research note, etc. (scientific journal)
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シカ排除柵の内外におけるブナ成木の肥大成長量の比較
阿部隼人, 付東川, 佐藤忠道, 徳本雄史, 櫻井優樹, 兵藤不二夫, 片山歩美
日本森林学会大会学術講演集 135th 2024
Publishing type：Rapid communication, short report, research note, etc. (scientific journal)
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九州山地のブナ林における土壌侵食による葉の生理学的特性への影響
東若菜, 小切壮仁, 杉本廉, 櫻井優樹, 徳本雄史, 阿部隼人, 久米朋宣, 片山歩美
日本森林学会大会学術講演集 135th 2024
Publishing type：Rapid communication, short report, research note, etc. (scientific journal)
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白色腐朽菌Phlebia sp.MG-60株におけるMAPキナーゼHOG1の過剰発現はエタノール発酵と菌糸成長を抑制する
元田多一, 陳富嘉, 津山濯, 徳本雄史, 亀井一郎, 雉子谷佳男
日本木材学会大会研究発表要旨集(完全版)(CD-ROM) 73rd 2023
Publishing type：Rapid communication, short report, research note, etc. (scientific journal)
Presentations 【 display / non-display 】
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Assessing spatial and temporal variations in soil erosion using UAV in an understory declined forest
Miyazaki Takuma, Shinohara Yoshinori, Tokumoto yuji, Katayama Ayumi, Kume Tomonori
The Japanese Forest Society Congress 2022.5.30 The Japanese Forest Society
Event date： 2022.5.30
Language：English Presentation type：Oral presentation (general)
[in Japanese]
Grant-in-Aid for Scientific Research 【 display / non-display 】
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下層植生消失によるブナの水・養分ストレスが土壌生物多様性と生態系機能に与える影響
Grant number：23K25047 2024.04 - 2026.03
独立行政法人日本学術振興会 科学研究費基金 基盤研究(B)
Authorship：Coinvestigator(s)
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Elucidation of ecological function of pioneer tree species and interspecific interaction with late succession tree species for vegetation restoration in Southeast Asia
Grant number：22K05692 2022.04 - 2026.03
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C) Grant-in-Aid for Scientific Research (C)
Authorship：Principal investigator
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Discrimination and broad-scale mapping of evergreen broad-leaved trees in Japan and Borneo by satellite remote-sensing with high frequency and high spatial resolution
Grant number：22K12352 2022.04 - 2026.03
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C) Grant-in-Aid for Scientific Research (C)
Authorship：Coinvestigator(s)
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Impact of beech water and nutrient stress induced by understory degradation on soil biodiversity and ecosystem function
Grant number：22H03793 2022.04 - 2026.03
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B) Grant-in-Aid for Scientific Research (B)
Authorship：Coinvestigator(s)
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Community-wide phenological study by transcriptome analysis in Southeast Asian tropical plant
Grant number：19K15875 2019.04 - 2022.03
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists Grant-in-Aid for Early-Career Scientists
Tokumoto Yuji
Authorship：Principal investigator
This study aimed to clarifying the species-level and community-level phenology phenomena from the relationship among phenology, meteorological data, and expressed genes in the trees of Dipterocarpaceae, Leguminosae, and Ebenaceae families in Southeast Asian tropical forest. During the study period, precipitation decreased, community-wide synchronous flowering occurred, and many of the targeted individuals flowered. The expressed genes analysis revealed that the expression levels of either drought response genes and cold response genes or both were changed before flowering. This suggests that the two flowering factors, drought, and low temperature, which have been discussed as the triggers for synchronized flowering, have been confirmed from the level of expressed genes in multiple canopy tree species. This study suggested that many of the canopy trees might respond to the subtle changes in weather conditions followed by causing the phenological phenomena.