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Influence of the alteration of functional core microbiota by forest disturbance on ecosystem restoration

Research Project

Project/Area Number 19K12411
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 64040:Social-ecological systems-related
Research InstitutionThe University of Tokyo

Principal Investigator

Hirao Toshihide  東京大学, 大学院農学生命科学研究科(農学部), 講師 (90598210)

Co-Investigator(Kenkyū-buntansha) 森長 真一  帝京科学大学, 生命環境学部, 准教授 (80568262)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords機能遺伝子 / 樹木実生 / 硝化作用 / 植生衰退 / 植物-土壌フィードバック / 土壌微生物叢 / ニホンジカ / 履歴効果 / 生物多様性 / 生態系機能
Outline of Research at the Start

近年、シカによる森林の植生衰退の対策として、生態系修復のため各地にシカ排除柵が設置されている。しかし、植生回復が十分進まない事例も多く、その原因の1つとして、植生衰退に伴う土壌機能の低下が植生回復を阻害することが考えられる。このメカニズムとして、土壌中の物質循環の変化だけでなく、土壌微生物叢の変化が直接的に植生動態に影響を及ぼしている可能性がある。本研究では、植生衰退が土壌の機能的コア微生物叢の改変を通じて生態系修復に及ぼす影響を解明する。

Outline of Final Research Achievements

In this study, interactions between tree seedlings and soil microbes were analyzed to examine the mechanism of negative plant-soil feedback effects, in which deer-induced forest vegetation decline causes degradation of soil functions and impedes vegetation recovery. The results revealed that changes in soil nutrient dynamics associated with vegetation decline reduce the activity of soil microbes, which acts as a legacy effect on the growth of the next generation of plants, and that responses differ among plant functional groups. This study suggests that forest vegetation decline may not only impede vegetation recovery due to changes in soil microbiome, but may also cause a transition to vegetation that is different from that prior to vegetation decline.

Academic Significance and Societal Importance of the Research Achievements

近年、シカによる森林の植生衰退が環境保全上の大きな課題になっており、生態系修復のため、シカ排除柵が設置されているが、植生回復が十分進まない事例も多い。その原因として植生衰退に伴う土壌機能の低下が植生回復を阻害する負の植物-土壌フィードバック作用が提唱されている。本研究では、シカによる植生衰退が土壌微生物叢の変化を通じて土壌機能を損なう可能性があることを明らかにした。この成果は、植食者を介した地上部-地下部相互作用が履歴効果として森林生態系に影響を及ぼすことについて新たな知見を示すとともに、植生変化の予測や生態系修復の技術の発展に寄与すると期待される。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2022 2021 2020 2019

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (8 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Saprotrophic and ectomycorrhizal fungi exhibit contrasting richness patterns along elevational gradients in cool-temperate montane forests2021

    • Author(s)
      Shigyo Nobuhiko、Hirao Toshihide
    • Journal Title

      Fungal Ecology

      Volume: 50 Pages: 101036-101036

    • DOI

      10.1016/j.funeco.2020.101036

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Influence of understory vegetation on soil bacterial communities and nitrogen cycling gene abundance in cool-temperate and sub-alpine forests along an elevational gradient2021

    • Author(s)
      Toshihide Hirao, Masanori Fujii, Nobuhiko Shigyo, Hisaya Kojima, Manabu Fukui
    • Journal Title

      Pedobiologia

      Volume: 87-88 Pages: 150746-150746

    • DOI

      10.1016/j.pedobi.2021.150746

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Distribution Expansion of Plants Unpalatable to Sika Deer in Chichibu Mountains2020

    • Author(s)
      牧野 結衣、平尾 聡秀、梅木 清
    • Journal Title

      Papers on Environmental Information Science

      Volume: ceis34 Issue: 0 Pages: 156-161

    • DOI

      10.11492/ceispapers.ceis34.0_156

    • NAID

      130007951586

    • Year and Date
      2020-12-07
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Characterization of the complete chloroplast genome of Betula chichibuensis (Betulaceae), a critically endangered limestone birch2020

    • Author(s)
      Takuya Yoshida, Yuji Igarashi & Toshihide Hirao
    • Journal Title

      Mitochondrial DNA Part B: Resources

      Volume: 5 Issue: 3 Pages: 2166-2167

    • DOI

      10.1080/23802359.2020.1768932

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Seasonal dynamics of soil fungal and bacterial communities in cool-temperate montane forests2019

    • Author(s)
      Nobuhiko Shigyo, Kiyoshi Umeki & Toshihide Hirao
    • Journal Title

      Frontiers in Microbiology

      Volume: 10 Pages: 1944-1944

    • DOI

      10.3389/fmicb.2019.01944

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 奥秩父山地における航空レーザデータを用いたササ稈密度の推定2022

    • Author(s)
      梅木清・平尾聡秀
    • Organizer
      第133回日本森林学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 奥秩父山地における気温・地温の広域時系列予測モデル2022

    • Author(s)
      本郷惠莉・平尾聡秀・梅木清
    • Organizer
      第133回日本森林学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 植生衰退が土壌微生物機能の攪乱を介して実生更新に及ぼす履歴効果の解明2021

    • Author(s)
      谷川鴻介・平尾聡秀
    • Organizer
      第132回日本森林学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] サワラ人工林における腐朽病害木と健全木の環境マイクロバイオームの違い2021

    • Author(s)
      平尾聡秀・原口竜成・山田利博
    • Organizer
      第132回日本森林学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 土壌菌類ギルド間の相互作用が有機物分解に及ぼす影響2020

    • Author(s)
      執行宣彦・平尾聡秀
    • Organizer
      第131回日本森林学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] シカ食害下の樹木動態と環境要因がリター生産量に及ぼす影響2020

    • Author(s)
      塚本宝・梅木清・平尾聡秀
    • Organizer
      第131回日本森林学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 奥秩父山地におけるシカ忌避植物と環境条件の関係2020

    • Author(s)
      牧野結衣・梅木清・平尾聡秀
    • Organizer
      第131回日本森林学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Tree functional diversity regulates the diversity of soil fungal guilds in cool temperate montane forests2019

    • Author(s)
      Nobuhiko Shigyo & Toshihide Hirao
    • Organizer
      Asian Mycological Congress 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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