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2013 Fiscal Year Final Research Report

Impacts of invasion and eradication of an invasive tree species on soil water contents in subtropical forests on an oceanic island

Research Project

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Project/Area Number 24710274
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Resource conservation science
Research InstitutionTokyo Metropolitan University

Principal Investigator

HATA Kenji  首都大学東京, 理工学研究科, 研究員 (60468147)

Project Period (FY) 2012-04-01 – 2014-03-31
Keywords外来生物 / 生態系管理 / 海洋島 / 水循環 / 小笠原諸島
Research Abstract

The eradication of dominant, nonnative trees can alter the of soil environments in forest ecosystems via water balance. To test this idea, we measured water in surface soil in forests dominated by an invasive nonnative tree (Casuarina equisetifolia Forst.) in areas with and without experimental eradication on the Ogasawara Islands, subtropical islands in the northwestern Pacific Ocean. Volumetric water contents of surface soils at sites where all trees of C. equisetifolia were killed by herbicide were compared with those of adjacent control sites, considering time after tree removal. Volumetric soil water content at sites where C. equisetifolia were removed (removal sites) was significantly higher than at control sites. We found that water content decreased slightly lower with time after removal. The slower reduction of soil water content during the period, which was detected in drying events, indicated that loss of water from the soil would be decreased by the removal treatments.

  • Research Products

    (7 results)

All 2014 2013 2012 Other

All Journal Article (5 results) (of which Peer Reviewed: 4 results) Presentation (2 results)

  • [Journal Article] Temporal changes in soil water contents of forests dominated by Casuarina equisetifolia on Nishijima Island before and after their eradication2014

    • Author(s)
      Hata, K., Kawakami, K. and Kachi, N.
    • Journal Title

      Ogasawara Research

      Volume: Vol. 40 Pages: 1-9

    • Peer Reviewed
  • [Journal Article] 島におけるトクサバモクマオウのリターの分解過程2013

    • Author(s)
      畑憲治, 可知直毅
    • Journal Title

      小笠原研究年報

      Volume: 36巻 Pages: 11-17

    • URL

      http://www.repository.lib.tmu.ac.jp/dspace/handle/10748/5747

  • [Journal Article] Leaf litter of the invasive Casuarina equisetifolia decomposes at the same rate as that of native woody species on oceanic islands but releases more nitrogen2012

    • Author(s)
      Hata, K., Kato, H. and Kachi, N.
    • Journal Title

      Weed Research

      Volume: Vol. 52 Pages: 542-550

    • DOI

      10.1111/j.1365-3180.2012.00945.x

    • Peer Reviewed
  • [Journal Article] Fine-scale distribution of aboveground biomass of herbaceous vegetation and soil nutrients on an oceanic island after goat eradication are correlated with grazing damage and seabird nesting

    • Author(s)
      Hata, K., Kohri, M., Morita, S., Hiradate, S. and Kachi, N.
    • Journal Title

      Pacific Conservation Biology

      Volume: (印刷中)

    • Peer Reviewed
  • [Journal Article] Complex inter- relationships among aboveground biomass, soil chemical properties, and events caused by feral goats and their eradication in a grassland ecosystem of an island

    • Author(s)
      Hata, K., Kohri, M., Morita, S., Hiradate, S. and Kachi, N.
    • Journal Title

      Ecosystems

      Volume: (印刷中)

    • Peer Reviewed
  • [Presentation] 外来木本種の駆除に伴う土壌含水量の変化は駆除からの経過時間に依存する2014

    • Author(s)
      畑憲治, 可知直毅
    • Organizer
      日本生態学会第61回大会
    • Place of Presentation
      広島
    • Year and Date
      20140300
  • [Presentation] 海洋島における外来木本種の駆除は、土壌水分量を増加させる2013

    • Author(s)
      畑憲治, 可知直毅
    • Organizer
      日本森林学会119回大会
    • Place of Presentation
      盛岡
    • Year and Date
      20130300

URL: 

Published: 2015-06-25  

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