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2005 Fiscal Year Final Research Report Summary

Physiological mechanism of invasion success of trees in the Bonin islands in Japan

Research Project

Project/Area Number 14360091
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 林学
Research InstitutionForestry and Forest Products Research Institute

Principal Investigator

ISHIDA Atsushi  Forestry and Forest Products Research Institute, Department of Plant Ecology, Head of laboratory, 植物生態研究領域, 室長 (60343787)

Co-Investigator(Kenkyū-buntansha) YAMASHITA Naoko  Forestry and Forest Products Research Institute, Hokkaido Research Center, Researcher, 北海道支所, 研究員 (70353901)
NAKANO Takashi  Yamanashi Institute of Environmental Sciences, Division of Natural Environmental Sciences, Researcher, 植物生態研究室, 主任研究員 (90342964)
Project Period (FY) 2002 – 2005
KeywordsInvasion trees / Bishofia javanica / Photoinhibition / Photosynthesis / Acclimation / Bonin islands / Wood density / LMA
Research Abstract

The flora of Bonin islands in Japan has a high degree of endemism (70% among tree species), especially in the ridge sites with shallow soils. The dwarf evergreen forests characterized by the co-existence of a magnitude of tree species are generally found at the ridge sites. The interspecific variability of sunlit leaf characteristics was investigated among the dwarf evergreens. LMA (dry mass per unit leaf area) was positively correlated to leaf lifespan, wood (stem) density, nitrogen per unit leaf mass, lamina thickness, δC, and negatively correlated to leaf osmotic potentials and water contents at full turgor, leaf-mass based photosynthetic rates (P_n), leaf area-based P_n, and leaf nitrogen-based P_n. The values of δC were positively correlated to LAM, wood (stem) density, and leaf thickness. Nitrogen re-absorption rates at leaf shedding were 50% in the average, and were not correlated to any leaf characteristics.
Bishofia javanica is an alien tree species that has successfully invaded to the Bonin islands. Because the invasion of the species was frequently found following canopy-gap formation in the islands, we hypothesized that B.javanica has greater acclimation capacity than native tree species to fluctuations in understory light. Following the shade-to-sun and sun-to-shade transfers, pioneer tree species had high new-leaf production rates but low acclimation capacity of old leaves, whereas late-successional tree species had low new-leaf production rates but high acclimation capacity of old leaves. In contrast, B.javanica had high new-leaf production rates, high acclimation capacity of old leaves, and the highest growth rates among the tree species. B.javanica seedlings had relatively high survival rates under shaded understory in the Bonin islands. We conclude that high stress-tolerance under resource conditions and high resource-use under fluctuating environment conditions are a physiological key factor of invasion success.

  • Research Products

    (12 results)

All 2005 2003 2002

All Journal Article (12 results)

  • [Journal Article] Root hydraulic conductivity and whole-plant water balance in tropical saplings following a shade-to-sun transfer.2005

    • Author(s)
      Shimizu M., Ishida A., Hogetsu T.
    • Journal Title

      Oecologia 143.3

      Pages: 189-197

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Root hydraulic conductivity and whole-plant water balance in tropical saplings following a shade-to-sun transfer.2005

    • Author(s)
      Shimizu M., Ishida A., Hogetsu T.
    • Journal Title

      Oecologia 143-3

      Pages: 189-197

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Seed and seedling demography of invasive and native trees of subtropical Pacific islands.2003

    • Author(s)
      Yamashita N., Tanaka N., Hoshi Y., Kushima H., Kamo K.
    • Journal Title

      Journal of Vegetation Science 14.1

      Pages: 15-24

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Seed and seedling demography of invasive and native trees of subtropical Pacific islands.2003

    • Author(s)
      Yamashita N., Tanaka N., Hoshi Y., Kushima H., Kamo K
    • Journal Title

      Journal of Vegetation Science 14-1

      Pages: 15-24

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Leaf ontogenetic dependence of light acclimation in invasive and native subtropical trees of different successional status.2002

    • Author(s)
      Yamashita N., Koike N., Ishida A.
    • Journal Title

      Plant, Cell and Environment 25・10

      Pages: 1341-1356

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Size distribution, growth and inter-year variation in sex expression of Bishofia javanica, an invasive tree.2002

    • Author(s)
      Yamashita N., Abe T.
    • Journal Title

      Annals of Botany 90・5

      Pages: 599-605

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Sex ratio variation of Bishofia javanica B1. (Euphorbiaceae) between native habit, Okinawa (Ryukyu islands), and invaded habitat, Ogasawara (Bonin islands).2002

    • Author(s)
      Abe T., Yamashita N., Tanaka N., Kushima H.
    • Journal Title

      International Journal of Plant Science 163.6

      Pages: 1011-1016

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] アカギ -特集 小笠原の森林の生物多様性保全-2002

    • Author(s)
      山下直子
    • Journal Title

      森林科学 34.1

      Pages: 9-13

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Leaf ontogenetic dependence of light acclimation in invasive and native subtropical trees of different successional status.2002

    • Author(s)
      Yamashita N., Koike N., Ishida A.
    • Journal Title

      Plant, Cell and Environment 25-10

      Pages: 1341-1356

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Size distribution, growth and inter-year variation in sex expression of Bishofia javanica, an invasive tree.2002

    • Author(s)
      Yamashita N., Abe T.
    • Journal Title

      Annals of Botany 90-5

      Pages: 599-605

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Sex ratio variation of Bishofia javanica B1.(Euphorbiaceae) between native habit, Okinawa (Ryukyu islands), and invaded habitat, Ogasawara (Bonin islands).2002

    • Author(s)
      Abe T., Yamashita N., Tanaka N., Kushima H.
    • Journal Title

      International Journal of Plant Science 163-6

      Pages: 1011-1016

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Bischofia javanica Blume (in Japanese)2002

    • Author(s)
      Yamashita N.
    • Journal Title

      Shinrin-Kagaku 34-1

      Pages: 9-13

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2007-12-13  

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