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Factors causing inter-specific difference in drought tolerance in a tropical rain forest

Research Project

Project/Area Number 19H02992
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 40010:Forest science-related
Research InstitutionNagoya University

Principal Investigator

Nakagawa Michiko  名古屋大学, 生命農学研究科, 准教授 (70447837)

Co-Investigator(Kenkyū-buntansha) 松尾 奈緒子  三重大学, 生物資源学研究科, 准教授 (00423012)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2021: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2019: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Keywords吸水深度 / 東南アジア熱帯雨林 / 安定同位体分析 / 樹木根 / 乾燥ストレス / 熱帯雨林 / 地上部特性 / 樹木の吸水深度 / 安定同位体比分析 / 乾燥ストレス耐性 / 季節変化 / 乾燥耐性
Outline of Research at the Start

気候変動に伴って乾燥化が危惧されている熱帯雨林では、樹木の種によって乾燥ストレスに対する感受性が種によって異なると考えられているが、そのメカニズムは未だに解明しきれていない。これまでは、乾燥ストレスへの耐性と地上部(主に葉)の水分生理特性との関連性が注目されてきたが、水吸収は地下部の根系で行われることから、熱帯樹木の乾燥ストレス耐性の種間差は、吸水深度の違いに起因していると仮説を立てた。本研究では、東南アジア熱帯雨林の高木種を対象に、①乾燥期間における吸水深度、②吸水深度と乾燥ストレス耐性との関係性、および③吸水深度と地上部(葉と材)の水分生理特性との関係について明らかにする。

Outline of Final Research Achievements

In Lambir Hills National Park in Sarawak, Malaysia, which is known for the extremely high tree species diversity, we estimated root water uptake depths of tropical canopy trees using stable isotope analysis and investigated interspecific and temporal variations in water uptake depth, and relationships with aboveground traits.
We found that Dipterocarpus globosus relied on more deep soil water among six dipterocarp tree species and that although water uptake depth varied according to the soil moisture content and temperature, the pattern varied among tree species. Our results also suggested that tree species that flowered more frequently tended to absorb water from deeper layers. Such species-specific and temporal variations in water acquisition ability may influence species-specific drought tolerance.

Academic Significance and Societal Importance of the Research Achievements

乾燥が進むにつれて土壌表層から水が蒸発するため、土壌深度に沿って水の酸素や水素の安定同位体比勾配が形成されること、および樹木の根から吸水された水の同位体分別が樹体内では起こらないことを利用して、樹木の吸水深度は推定されてきた。そのため、頻繁な降雨によって土壌の同位体比勾配が形成されにくい湿潤林の樹木の吸水深度に関する研究はかなり限定的であったが、本研究により、試料の採集方法を工夫することで、熱帯雨林樹木でも吸水深度推定が可能であることを示した。また、樹木の吸水深度と開花頻度の関係を初めて明らかにした点でも、学術的意義が高い研究成果である。

Report

(4 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (14 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (7 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Int'l Joint Research] サラワク州森林局(マレーシア)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Forest Department Sarawak(マレーシア)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] サラワク州森林局(マレーシア)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Perspective: Improving the accuracy of plant phenology observations and land-cover and land-use detection by optical satellite remote-sensing in the Asian tropics2023

    • Author(s)
      Nagai Shin、Katsumata Chifuyu、Miura Tomoaki、Tsutsumida Narumasa、Ichie Tomoaki、Kotani Ayumi、Nakagawa Michiko、Khoon Kho Lip、Kobayashi Hideki、et al.
    • Journal Title

      Frontiers in Forests and Global Change

      Volume: 6 Pages: 1-16

    • DOI

      10.3389/ffgc.2023.1106723

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effects of host tree size on the species richness and abundance of epiphyte assemblages in a Bornean lowland tropical forest2022

    • Author(s)
      Natsuki Komada, Takao Itioka, Akira Nakanishi, Shuichiro Tagane, Usun Shimizu-kaya, Michiko Nakagawa, Paulus Meleng, Runi anak Sylvester
    • Journal Title

      Tropics

      Volume: 30 Issue: 4 Pages: 53-61

    • DOI

      10.3759/tropics.MS21-12

    • NAID

      130008165601

    • ISSN
      0917-415X, 1882-5729
    • Year and Date
      2022-03-01
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Water uptake patterns of tropical canopy trees in Borneo: Species-specific and temporal variation and relationships with aboveground traits2022

    • Author(s)
      Katsuura Hiiragi, Naoko Matsuo, Shoko Sakai, Kazuma Kawahara, Tomoaki Ichie, Tanaka Kenzo, Dulce Chung Aurelia, Tomonori Kume, Michiko Nakagawa
    • Journal Title

      Tree Physiology

      Volume: 42 Pages: 1928-1942

    • DOI

      10.1093/treephys/tpac061

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Vertical variation in wood CO2 efflux is not uniformly related to height: Measurement across various species and sizes of Bornean tropical rainforest trees.2019

    • Author(s)
      A. Katayama, T. Kume, R. Ichihashi, M. Nakagawa
    • Journal Title

      Tree Physiology

      Volume: 印刷中 Issue: 6 Pages: 1000-1008

    • DOI

      10.1093/treephys/tpz022

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] Comparison of tree species composition between two heath forest in southern part of Sarawak2023

    • Author(s)
      Nur Safinas Binti JELANI, Meekiong KALU, Yahud Bin WAT, Yazid Bin KALBI, Halipah Binti BUJANG, Mohizah Binti MOHAMAD, Noorhana Binti MOHD SAPAWI, Stafannie Nilla Anak MARSHALL RIO, Dami Anak JUDE, Michiko NAKAGAWA
    • Organizer
      第70回日本生態学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 東南アジア熱帯雨林における樹木の吸水深度特性:種間差・季節変動・地上部特性との関係2022

    • Author(s)
      勝浦柊,松尾奈緒子,酒井章子,川原和眞,市栄智明,田中憲蔵,Dulce Chung Aurelia,久米朋宣,中川弥智子
    • Organizer
      第32回日本熱帯生態学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Variation of effects of host tree size on the species richness and abundance of epiphyte assemblages among tropical forests2022

    • Author(s)
      Natsuki Komada, Takao Itioka, Akira Nakanishi, Shuichiro Tagane, Usun Shimizu-kaya, Michiko Nakagawa, Paulus Meleng, Runi anak Sylvester
    • Organizer
      58th annual meeting of the association for tropical biology and conservation
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Long-term Field Data Unveil Characteristics of Phenology and Forest Dynamics in a Bornean Tropical Rain Forest2021

    • Author(s)
      Michiko Nakagawa
    • Organizer
      (The 9th IC-GU12) International Symposium on a recent progress in forest ecology and management 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Carbon cycling of a mature tropical rainforest in Lambir Hills Natinoal Park2021

    • Author(s)
      Ayumi Katayama, Mizue Ohashi, Michiko Nakagawa
    • Organizer
      International Conference on Forest Resources Management
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] フタバガキ科樹木における吸水深度の種間比較2020

    • Author(s)
      勝浦柊・松尾奈緒子・中川弥智子
    • Organizer
      第67回日本生態学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Effects of rainfall exclusion on tropical emergent tree in Southeast Asian tropics2020

    • Author(s)
      Yuji Tokumoto, Masaki J Kobayashi, Masaomi Hatakeyama, Yuta Inoue, Yayoi Takeuchi, Daisuke Todaka, Tomonori Kume, Tomo'omi Kumagai, Tomoaki Ichie9, Tohru Nakashizuka, Michiko Nakagawa, Shoko Sakai, Kentaro K Shimizu
    • Organizer
      World Biodiversity Forum
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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