種子島におけるヤクタネゴヨウの新群生地の発見  [in Japanese] A new population of Pinus armandii Franch. var. amamiana (Koidz.) Hatusima on Tanega-shima Island, southwestern Japan  [in Japanese]

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Author(s)

Abstract

種子島の早稲田川沿いの木成国有林において絶滅危惧種ヤクタネゴヨウの分布調査を行い,新たな群生地(個体群)を発見した.この個体群は林齢43年の若い二次林であった.2ha内に生残している樹高2m以上のヤクタネゴヨウ成木138個体を確認し,その密度は69個体/haであった.これほどの高密度で分布するヤクタネゴヨウの個体群は,他の自生地でも報告例がない.種子島では,これまでヤクタネゴヨウの推定生残個体数は100個体といわれてきたが,今後はこの値を修正する必要があろう.この個体群内外で,マツ材線虫病とみられる被害で枯死したとみられるクロマツならびにヤクタネゴヨウが観察された.この個体群一帯を保護林等に設定することを九州森林管理局へ要望書を提出するとともに,マツ材線虫病への対策を早急に講じていく必要性も指摘した.

We found a new population of an endangered species, Pinus armandii var. amamiana, in the Kinari National Forest along the Waseda River on Tanega-shima Island in southwestern Japan. This population is a 43-year-old secondary forest. A 2-ha area contained 138 surviving P. armandii var. amamiana trees over 2.0m tall, although no seedlings were found. The calculated population density of 69 trees/ha is the highest yet reported. Previously, an estimated 100 P. armandii var. amamiana trees were thought to exist on Tanega-shima Island, but based on this new evidence, the number should be revised. Some dead P. thunbergii and P. armandii var. amamiana trees, which were probably damaged by pine wilt disease, were found in and near this population. We have submitted an appeal to the Kyushu Regional Forest Office of the Forestry Agency, with the aim of establishing a new Protected Forest to preserve the genetic resources within the Kinari National Forest on Tanega-shima Island. We also suggest that measures be taken to counter pine wilt disease in and near this population.

Journal

  • Japanese Journal of Conservation Ecology

    Japanese Journal of Conservation Ecology 9(1), 77-82, 2004

    The Ecological Society of Japan

References:  20

Cited by:  3

Codes

  • NII Article ID (NAID)
    110004741102
  • NII NACSIS-CAT ID (NCID)
    AA11857952
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    1342-4327
  • NDL Article ID
    7223985
  • NDL Source Classification
    ZR1(科学技術--生物学)
  • NDL Call No.
    Z18-B498
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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