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Invasiveness of alien plants on oceanic islands: Interactions between nutrient use characteristics of plants and soil characteristics in an ecosystem

Research Project

Project/Area Number 19H02978
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 39060:Conservation of biological resources-related
Research InstitutionTokyo Metropolitan University

Principal Investigator

KACHI NAOKI  東京都立大学, 理学研究科, 客員教授 (30124340)

Co-Investigator(Kenkyū-buntansha) 大澤 剛士  東京都立大学, 都市環境科学研究科, 准教授 (40554332)
平舘 俊太郎  九州大学, 農学研究院, 教授 (60354099)
畑 憲治  日本大学, 商学部, 准教授 (60468147)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2021: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2020: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2019: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Keywords外来生物 / 外来植物 / 海洋島 / 侵略性 / 土壌条件 / 小笠原 / 生態系修復・整備 / 生態学 / 土壌学
Outline of Research at the Start

本研究は「外来生物の侵略性は、その種の生物学的な形質と侵入先の生態系の特徴との相互作用によって決まる」という仮説を検証する。海洋島(大陸と陸続きになったことがない島)である小笠原諸島に侵入した侵略的外来植物(モクマオウ、ギンネム、アカギ)において、前2種は甚大な生態系影響をもたらしているのに対し、アカギは母島以外では著しい侵略性を示さない。これは、現状のリスク評価法では現実の侵略性の程度を適正に評価できないことを示唆する。これら3 種の比較を通し、これまでのリスク評価で見逃されてきた外来生物の侵略性を決める要因を明らかにするとともに、侵略性のリスクを評価するための新しい手法を開発する。

Outline of Final Research Achievements

We investigated invasiveness of woody plants (Bischofia javanica, Casuarina equisetifolia and Leucaena leucocephala) which invaded on the Ogasawara Islands, focusing on interactions between their nutrient usage and soil chemical characteristics. Particularly, it was suggested that interactions between nutrient usage of Bischofia javanica and available soil phosphorus and soil pH are possible causal factors for the high invasiveness of the species on Haha-jima Island. Analysis of species distribution modeling of the three species revealed that Bischofia javanica has unique habitat requirements compared with the other two species.

Academic Significance and Societal Importance of the Research Achievements

小笠原諸島における侵略的外来植物について、その土壌養分要求特性に注目し、侵入先となる生態系を特徴づける成立要因とどのように相互作用するかを栽培実験、土壌分析、空間解析により検討した。本研究は、自然界での植物の分布における植物の土壌養分要求特性の役割を明らかにしたものであり、その成果は、小笠原諸島における外来植物の制御に直接貢献するだけでなく、植物栄養学に対しても新たな研究課題を提示できると期待される。

Report

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

    (15 results)

All 2022 2021 2020 2019

All Journal Article (10 results) (of which Peer Reviewed: 3 results,  Open Access: 6 results) Presentation (4 results) Book (1 results)

  • [Journal Article] Utilization potential of alien plants in nature-based tourism sites: A case study on Agave americana (century plant) in the Ogasawara Islands2022

    • Author(s)
      Onozuka, M. & Osawa, T.
    • Journal Title

      Ecological Economics

      Volume: 195 Pages: 107362-107362

    • DOI

      10.1016/j.ecolecon.2022.107362

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 北硫黄島に分布する土壌2021

    • Author(s)
      平舘俊太郎
    • Journal Title

      Ogasawara Research

      Volume: 47 Pages: 61-72

    • NAID

      120007171164

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Recent control of invasive alien animals in the Bonin Islands2019

    • Author(s)
      Sato, N.
    • Journal Title

      Global Environmental Research

      Volume: 23 Pages: 9-19

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Journal Article] Establishing a strategic management plan for alien invasive plants in the Ogasawara Islands2019

    • Author(s)
      Osawa, T.
    • Journal Title

      Global Environmental Research

      Volume: 23 Pages: 21-28

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Journal Article] Properties of soils of the Ogasawara Islands: Keys to understand past nature and find adequate management for future2019

    • Author(s)
      Hiadate, S.
    • Journal Title

      Global Environmental Research

      Volume: 23 Pages: 29-36

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Journal Article] Loss of ecosystem functions caused by severe disturbances in the Ogasawara Islands can limit restoration:Implications for a new framework of practical restoration of disturbed ecosystems after eradication of feral goats2019

    • Author(s)
      Hata, K.
    • Journal Title

      Global Environmental Research

      Volume: 23 Pages: 37-44

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Journal Article] Soil erosion alters soil chemical properties and limits grassland plant establishment on an oceanic island even after goat eradication2019

    • Author(s)
      Hata K, Osawa T, Hiradate S, Kachi N
    • Journal Title

      Restoration Ecology

      Volume: 27 Issue: 2 Pages: 333-342

    • DOI

      10.1111/rec.12854

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Facilitation of management plan development via spatial classification of areas invaded by alien invasive plant2019

    • Author(s)
      Osawa, T.,Akasaka, M. & Kachi, N.
    • Journal Title

      Biological Invasions

      Volume: 21 Issue: 6 Pages: 2067-2080

    • DOI

      10.1007/s10530-019-01958-2

    • NAID

      120006768923

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Ecosystem changes following the eradication of invasive species: evaluation of various eradication scenarios by computer simulation2019

    • Author(s)
      Yoshida, K., Hata, K., Kawakami, K., Osawa, T., Hiradate, S. and Kachi, N.
    • Journal Title

      Ecological Modeling

      Volume: 143 Pages: 108831-108831

    • DOI

      10.1016/j.ecolmodel.2019.108831

    • Related Report
      2019 Annual Research Report
  • [Journal Article] 海洋島における野生化ヤギ駆除後の生態系の変化2019

    • Author(s)
      畑 憲治・可知直毅
    • Journal Title

      森林科学

      Volume: 86 Pages: 7-10

    • NAID

      130007676793

    • Related Report
      2019 Annual Research Report
  • [Presentation] 海洋島における侵略的外来木本種の侵入に伴う土壌水分環境と森林動態との関係2022

    • Author(s)
      畑 憲治
    • Organizer
      日本生態学会第69回大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 小笠原諸島・媒島および父島に分布する土壌の分散性2021

    • Author(s)
      斎藤星花・和田信一郎・森 裕樹・平舘俊太郎
    • Organizer
      日本土壌肥料学会2021年度北海道大
    • Related Report
      2021 Annual Research Report
  • [Presentation] 小笠原における外来樹木アカギ・ギンネムの侵略性:土壌化学特性に対する反応の種間差2021

    • Author(s)
      佐藤 臨・平舘俊太郎・畑 憲治・大澤剛士・可知直毅
    • Organizer
      日本生態学会第68回大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 小笠原諸島における外来樹木の侵入と駆除に伴う土壌含水量と植物群集構成の変化2020

    • Author(s)
      畑 憲治・川上和人・阿部 真・可知直毅
    • Organizer
      日本生態学会第66回大会
    • Related Report
      2019 Annual Research Report
  • [Book] 世界自然遺産小笠原諸島:自然と歴史文化(第8章、第11章)2021

    • Author(s)
      可知直毅
    • Total Pages
      196
    • Publisher
      朝倉書店
    • ISBN
      9784254180589
    • Related Report
      2020 Annual Research Report

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

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