Impacts of eradication of exotic species on matter flow in island ecosystems

2012 Fiscal Year Final Research Report

• Project/Area Number: 22241055
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Resource conservation science
• Research Institution: Tokyo Metropolitan University
• Principal Investigator: KACHI Naoki 首都大学東京, 大学院・理工学研究科, 教授 (30124340)
• Co-Investigator(Kenkyū-buntansha): HIRADATE Shuntarou 独立行政法人農業環境技術研究所, 生物多様性研究領域, 上席研究員 (60354099) ; KAWAKAMI Kazuto 独立行政法人農業環境技術研究所, 野生動物研究領域, 主任研究員 (50353652) ; YOSHIDA Katsuhiko 独立行政法人農業環境技術研究所, 生物・生態系環境研究センター, 主任研究員 (70332244)
• Co-Investigator(Renkei-kenkyūsha): KATO Hidetoshi 首都大学東京, 大学院・理工学研究科, 助教 (50305413) ; HATA Kenji 首都大学東京, 大学院・理工学研究科, 特任研究員 (60468147) ; KOHRI Mari 首都大学東京, 大学院・理工学研究科, 特任研究員 (10446388) ; AOYAMA Yukiko 東北大学, 大学院・生命科学研究科, 博士後期課程
• Project Period (FY): 2010 – 2012
• Keywords: 小笠原諸島 / クマネズミ / ノヤギ / 土壌栄養元素 / 生態系復元モデル / シミュレーション / 海鳥

Research Abstract

We evaluated effects of invasive exotic mammals on ecosystem function in oceanic islands and predicted changes in ecosystems after their eradication by field survey in the Ogasawara (Bonin) Islands and computer simulation. The model predicted that vegetation and biomass would be recovered more quickly when goats and rates were simultaneously eradicated. Our results suggested that considering spatial heterogeneity of biotic and abiotic environmental factor should be important for more feasible prediction of the ecosystem change.

Research Products

• [Journal Article] Bryan's Shearwaters have survived on the Bonin Islands (2012)
  • Author(s): Kawakami, K., Eda, M., Horikoshi, K., Suzuki, H., Chiba, H. & Hiraoka, T.
  • Journal Title: Northwestern Pacific. Condor Volume: 114 Pages: 507-512
  • DOI: DOI:10.1525/cond.2012.110196
  • Peer Reviewed
• [Journal Article] Potential role of frugivorous birds in the recovery process of forest vegetation after feral goat eradication in Mukojima Island (2012)
  • Author(s): Emura, N., Kawakami, K.DOI:10.1007/s10310-011-0300-7, Deguchi, T. & Sone, K
  • Journal Title: the Bonin Islands. Journal of Forest Research Volume: 17 Pages: 352-359
  • DOI: DOI:10.1007/s10310-011-0300-7
  • Peer Reviewed
• [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 nitrogen (2012)
  • Author(s): Hata, K., Kato, H. & Kachi, N.
  • Journal Title: Weed Research Volume: 52 Pages: 542-550
  • DOI: DOI:10.1111/j.1365-3180.2012.00945.x
  • Peer Reviewed
• [Journal Article] Seabirds as adhesive seed dispersers of alien and native plants in the oceanic Ogasawara Islands (2012)
  • Author(s): Aoyama, Y., Kawakami, K. & Chiba, S
  • Journal Title: Japan. Biodiversity and Conservation Volume: 21 Pages: 2787-2801
  • DOI: DOI:10.1007/s10531-012-0336-9
  • Peer Reviewed
• [Journal Article] Seedlings of a native shrub can establish under forests dominated by an alien tree, Casuarina equisetifolia, on subtropical oceanic islands (2012)
  • Author(s): Hata, K., Kato, H. & Kachi, N.
  • Journal Title: Journal of Forest Research Volume: 17 Pages: 208-212
  • DOI: DOI:10.1007/s10310-011-0279-0
  • Peer Reviewed
• [Journal Article] 小笠原諸島における物質循環の特徴 (2012)
  • Author(s): 平舘俊太郎、森田沙綾香、加藤英寿
  • Journal Title: ペドロジスト Volume: 56巻 Pages: 96-100
  • URL: http://pedology.ac.affrc.go.jp/LasMag.html
  • Peer Reviewed
• [Journal Article] Unusually high levels of bio-available phosphate in the soils of Ogasawara Islands (2010)
  • Author(s): Morita, S., Kato, H., Iwasaki, N., Kusumoto, Y., Yoshida, K., & Hiradate, S
  • Journal Title: Japan: putative influence of seabirds, Geoderma Volume: 160 Pages: 155-164
  • DOI: DOI:10.1016/j.geoderma.2010.09.008
  • Peer Reviewed
• [Presentation] 栄養塩環境から見た小笠原の陸域生態系の特徴 (2013)
  • Author(s): 平舘俊太郎(2)・森田沙綾香
  • Organizer: 日本生態学会第60回大会
  • Place of Presentation: 静岡
  • Year and Date: 20130300
• [Presentation] 外来ほ乳類の駆除は島の植生に何をもたらすか:海鳥を介した影響 (2013)
  • Author(s): 青山夕貴子・川上和人
  • Organizer: 日本生態学会第60回大会
  • Place of Presentation: 静岡
  • Year and Date: 20130300
• [Presentation] 外来ほ乳類駆除後の草地生態系の変化:野外データによる解析 (2013)
  • Author(s): 畑 憲治・郡 麻里・高岡 愛・可知直毅
  • Organizer: 日本生態学会第60回大会
  • Place of Presentation: 静岡
  • Year and Date: 20130300
• [Presentation] 外来生物駆除後の生態系の変化:コンピュータシミュレーションによる解析 (2013)
  • Author(s): 吉田勝彦
  • Organizer: 畑 憲治・郡 麻里・高岡 愛・可知直毅
  • Place of Presentation: 静岡
  • Year and Date: 20130300
• [Presentation] 小笠原諸島媒島におけるノヤギ駆除前後の土地被覆変遷パターン (2013)
  • Author(s): 郡 麻里・畑 賢治・高岡 愛・可知直毅
  • Organizer: 畑 憲治・郡 麻里・高岡 愛・可知直毅
  • Place of Presentation: 静岡
  • Year and Date: 20130300
• [Presentation] Impacts of eradication of alien species on island ecosystems: Spatial distributions of carbon, nitrogen and phosphorus in soils after goat eradication. (2012)
  • Author(s): Hata, K., Kohri, M., Morita, S., Hiradate, S. & Kachi, N.
  • Organizer: 5th EAFES (East Asian Federation of Ecological Societies) International Congress
  • Place of Presentation: Ohtsu
  • Year and Date: 20120300
• [Presentation] Impacts of eradication of alien species on island ecosystems: preferred and unpreferred eradication scenarios. (2012)
  • Author(s): Yoshida, K., Hata, K., Kohri, M.& Kachi, N.
  • Organizer: 5th EAFES (East Asian Federation of Ecological Societies) International Congress
  • Place of Presentation: Ohtsu
  • Year and Date: 20120300
• [Presentation] Seed adhesion to seabirds through nest material (2012)
  • Author(s): Aoyama, Y. & Kawakami, K
  • Organizer: 5th EAFES (East Asian Federation of Ecological Societies) International Congress
  • Place of Presentation: Ohtsu
  • Year and Date: 20120300
• [Presentation] Characteristics of mineral compositions of plants growing on Ogasawara Islands, Japan (2012)
  • Author(s): Hiradate, S., Morita, S., Kusumoto, Y., Koyanagi, T., Hata, K., Sugai, K. & Kato, H.
  • Organizer: 59th Annual Meeting of Ecological Society of Japan
  • Place of Presentation: Ohtsu
  • Year and Date: 20120300
• [Presentation] Seabirds as adhesive deed dispersers of alien and native plats in the oceanic Ogasawara Islands, Japan (2012)
  • Author(s): Aoyama, Y. & Kawakami, K.
  • Organizer: 39th Meeting of the Pacific Seabirds Group
  • Place of Presentation: Hawaii
  • Year and Date: 20120200
• [Presentation] 小笠原諸島における海鳥の繁殖が土壌の化学的特性におよぼす影響:有効態リン酸および土壌pHに対する影響 (2012)
  • Author(s): 平舘俊太郎、森田沙綾香、川上和人、青山夕貴子
  • Organizer: 日本土壌肥料学会講演要旨集第58集 p. 26
  • Year and Date: 20120000
• [Book] 世界遺産の自然の恵み、 (2013)
  • Author(s): 可知直毅
  • Total Pages: 30-43
  • Publisher: 文一総合出版
• [Remarks] 可知直毅、海洋島における特異な生物相互作用と進化:海の恵み 日本生態学会第60回大会公開講演会「世界遺産における自然の恵みとその保全」, 2013.3, 静岡 (公開講演会)
• [Remarks] 平舘俊太郎えるかなめ、講演会「小笠原諸島の土壌の特異性と多様性」, 2012. 3, 小笠原村父島、土壌:小笠原の生態系を支えるかなめ、講演会「小笠原諸島の土壌の特異性と多様性」, 2012. 3, 小笠原村父島
• [Remarks] 川上和人、小笠原諸島の外来ネズミ根絶によって野鳥の世界はどのように変わったか変わるか、熱帯野鼠対策委員会第2回公開講演会「自然を護るための外来ネズミの根絶」, 2012.11, 東京
• [Remarks] 吉田勝彦、小笠原諸島の生態系を再現するコンピュータシミュレーション、国立環境研究所2011 年夏の大公開ポスター展示
• [Remarks] 本事業に関する内容を以下のURLのHP上に公開した。
  • URL: http://www.ogasawaraproject.jp/