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Does heavy masting enhance survivorship of seedlings in beech forest?

Research Project

Project/Area Number 16K14938
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Forest science
Research InstitutionShizuoka University

Principal Investigator

Iio Atsuhiro  静岡大学, 農学部, 准教授 (90422740)

Co-Investigator(Kenkyū-buntansha) 水永 博己  静岡大学, 農学部, 教授 (20291552)
片畑 伸一郎  岐阜大学, 応用生物科学部, 助教 (80648395)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsマスティング / ブナ / 葉面積 / 光環境 / 光合成量 / 葉分布構造 / 葉面積指数 / 林床光環境 / 稚樹の成長 / 樹冠構造 / 実生成長
Outline of Final Research Achievements

Masting impact on stand structure, light environment and photosynthesis was examined in mature beech stands on Mt. Naeba, Japan. Heavy masting decreased stand leaf area to the half of that in non-masting year, due to decrease in individual leaf size. This structural change mainly occurred in sunlit part of the canopy where many fruits are born. We have estimated the masting impact on within-stand light environment and photosynthesis with process-based model. Although the reduction of leaf area decreased stand photosynthesis by 20%, photosynthesis at lower part of the canopy and understory vegetation increased 2-3 times compared to that in in non-masting year. This result implies that masting may contribute to maintain branches in lower part of canopy and understory vegetation.

Academic Significance and Societal Importance of the Research Achievements

マスティング(大量一斉結実)による林分葉面積の低下が、樹冠下層や林床の光環境を改善し、階層構造の発達や林床植生の維持に貢献する可能性を示した。本研究の学術的意義は、これまで繁殖戦略として理解されていたマスティング現象に、3~10年周期で、薄く広く林床に光を供給する、いわばギャップとしての役割があることを示したことにある。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (2 results)

All 2019 2018

All Presentation (2 results)

  • [Presentation] 結実によるブナの枝葉構造と林分LAIの変化2019

    • Author(s)
      鶴賀太一 飯尾淳弘
    • Organizer
      第130回 日本森林学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] マスティングによるブナ林の樹冠構造と内部光環境、光合成量の変化2018

    • Author(s)
      飯尾 淳弘
    • Organizer
      日本森林学会
    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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