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Influences of the deposition of volcanic tephra on the phosphorus cycling of forest ecosystems

Research Project

Project/Area Number 17H01858
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental dynamic analysis
Research InstitutionKyoto University

Principal Investigator

Kitayama Kanehiro  京都大学, 農学研究科, 教授 (20324684)

Co-Investigator(Kenkyū-buntansha) 和穎 朗太  国立研究開発法人農業・食品産業技術総合研究機構, 農業環境変動研究センター, 上級研究員 (80456748)
Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2020: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2019: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Keywords生態学 / 環境変動 / 土壌学 / 環境分析 / 植物
Outline of Final Research Achievements

A huge amount of volcanic tephra has been intermittently added to forest ecosystems in subduction zones such as in Japan through its geological time. Tephra contains primary-mineral phosphorus, which is one of the most important biophilic nutrients, and tephra fall might have supplied a significant amount of phosphorus to the ecosystems. However, this hypothesis has not been tested. We collected soils from a total of 20 natural forests throughout Japan and determined the concentration of amorphous minerals as an index of tephra fall. The concentration of amorphous minerals varied greatly, mostly depending on the distance to a nearby volcano, and significantly correlated with the concentration of soil total and available phosphorus. This finding suggests that tephra fall provides a substantial amount of phosphorus to forest ecosystems and biogeochemically maintains the forest ecosystems in Japan.

Academic Significance and Societal Importance of the Research Achievements

陸域生態系の物質循環に与えるテフラの影響は、これまでほとんど研究されてこなかった。テフラは生命にとって必須のリンを一次鉱物として含有しリン供給源として働く可能性がある一方、テフラから生成される土壌鉱物(非晶質物質)はリン酸を強く吸着し植物にリン欠乏を生じさせる可能性もある。このどちらの効果が卓越しているのかは解明されていなかった。本研究から、テフラの加入が森林生態系にリンを施肥する効果を持ち、樹木がこれを利用することで森林生態系が持続している可能性を科学的に示した。火山噴火は災害をもたらす一方、自然生態系に栄養塩を供給する大きな生態系サービスを担っていることを示した。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (16 results)

All 2021 2020 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (13 results) (of which Invited: 2 results)

  • [Journal Article] Iron and aluminum association with microbially processed organic matter via meso-density aggregate formation across soils: organo-metallic glue hypothesis.2020

    • Author(s)
      Wagai, R, Kajiura, M, Asano, M.
    • Journal Title

      SOIL

      Volume: 6 Issue: 2 Pages: 597-627

    • DOI

      10.5194/soil-6-597-2020

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nitrogen mineralization rates of the soils incubated under different temperatures from different elevations along an environmental gradient on Yakushima Island2020

    • Author(s)
      Mana Mukai, Taiki Mori, Shin-ichiro Aiba, Kanehiro Kitayama
    • Journal Title

      Ecological Research

      Volume: 35 Issue: 2 Pages: 428-438

    • DOI

      10.1111/1440-1703.12092

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Productivity and morphological traits of fine roots in forest ecosystems along an elevation gradient of Yakushima Island.2019

    • Author(s)
      Mukai M., Sawada Y., Kitayama K., Aiba S.
    • Journal Title

      Journal of Forest Research

      Volume: 24 Issue: 1 Pages: 35-41

    • DOI

      10.1080/13416979.2018.1555882

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 日本の森林生態系における土壌窒素純無機化速度と火山灰加入の関係2021

    • Author(s)
      佐々木 真優、 向井 真那、 北山 兼弘
    • Organizer
      第68回日本生態学会大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 花崗岩土壌上に成立したコナラ林のリン利用特性と土壌フォスファターゼ活性2021

    • Author(s)
      水上知佳、澤田佳美、北山兼弘
    • Organizer
      第68回日本生態学会大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] キナバル山熱帯林の標高傾度における土壌リンの存在形態: 蛇紋岩土壌の特異性2021

    • Author(s)
      和穎 朗太・ 橋本洋平・ 平館俊太郎・ 横山大希・ 北山兼弘
    • Organizer
      日本ペドロジー学会 2021年度大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] キナバル蛇紋岩生態系における地質-土壌-植生間の相互作用2021

    • Author(s)
      北山 兼弘
    • Organizer
      日本ペドロジー学会 2021年度大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 日本の森林生態系における土壌深度別の細根現存量と細根形質の関係2020

    • Author(s)
      向井真那、佐々木真優、北山兼弘
    • Organizer
      第131回日本森林学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Tree strategies for acquisition of recalcitrant P in volcanic soils: with an emphasis on chemical properties of the rhizosphere of Quercus serrata.2020

    • Author(s)
      Mana Mukai, Mayu Takagi, Kanehiro Kitayama
    • Organizer
      第67回日本生態学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 日本列島の自然林における土壌窒素とリンの可給性を決定する要因2020

    • Author(s)
      佐々木真優、 向井真那、北山兼弘
    • Organizer
      第131回日本森林学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 日本の森林生態系における土壌窒素純無機化速度に影響を及ぼす要因2020

    • Author(s)
      佐々木真優、 向井真那、北山兼弘
    • Organizer
      第67回日本生態学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 森林生態系への火山灰加入の施肥効果:火山灰加入量の異なるコナラ林の比較検証2020

    • Author(s)
      高木真由、向井真那、北山兼弘
    • Organizer
      第67回日本生態学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Estimating the contribution of volcanic ash as a source of mineral nutrients in forest ecosystems on Yakushima Island using Sr and Pb stable isotopes2019

    • Author(s)
      Mana Mukai, Tamihisa Ohta, Shin Ki-cheol, Shin-ichiro Aiba, Kanehiro Kitayama
    • Organizer
      第66回日本生態学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 屋久島火山灰土壌における樹木細根滲出物と根圏土壌の化学特性の変化2019

    • Author(s)
      向井真那、相場慎一郎、北山兼弘
    • Organizer
      第130回 日本森林学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 火山灰土壌に生育する樹木はアロフェンに吸着したリンを獲得できているのか?2018

    • Author(s)
      向井真那・北山兼弘
    • Organizer
      日本森林学会
    • Related Report
      2017 Annual Research Report
  • [Presentation] リン欠乏の熱帯降雨林における、リン供給源としての土壌有機態リンの重要性2018

    • Author(s)
      横山大稀・北山兼弘
    • Organizer
      日本森林学会
    • Related Report
      2017 Annual Research Report

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Published: 2017-04-28   Modified: 2022-01-27  

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