九州地方のブナ林群落における組成分化の機構 The mechanism of the compositional differentiation of the beech forests in the Kyusyu District.

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著者

    • 西尾 孝佳 Nishio Takayoshi
    • 東京農工大学大学院連合農学研究科 The Doctoral Course In Agricultural Science, The United School, Tokyo University of Agriculture & Technology

抄録

  1. 九州地方のブナ林の組成分化の実態を明らかにするために,ブナ林と隣接群落から収集した450の植生調査スタンドを基に組成と環境要因の両面からの考察を試みた. <BR>  2.群落組成の検討では,九州のブナ林の島状の分布形態を反映して隣接群落との組成的関連性が強かった.そのうちでも渓谷林との関係が密であった.DCA法による解析の結果では,1軸は温度,海抜高度と,2軸は地形を介した水分環境と高い相関がみられた. <BR>  3.群落単位とDCA法の展開結果との関係でみると,第四紀の山岳では地形形成作用の歴史が浅く,立地環境の変化が小さいため,群落分化も進んでいないが,古生層の山岳では逆に多様な立地の形成を反映して,湿性に偏る多くの群落が発達していた.そして,第三紀の山岳はその中間的な性質であった. <BR>  4.地質に関係して地形の発達程度が異なり,ブナ林内部の組成分化もこの影響を強く受けていた.特に古い地質の山岳では,湿性群落への分化が明瞭である.湿性群落への分化に強く影響を与えたのは,渓谷林に分布の中心を持つ襲速紀要素の種であった.

We studied the floristic composition and environmental factors of the beech forests in the Kyusyu District to clarify details of their compositional differentiation, compared with that of adjacent communities such as fir forests, hemlock forests, oak forests, elm forests, wingnut forests, ash forests, pine forests, and shrub communities. Phytosociological classification using the Braun-Blanquet method indicated that the beech forests had a relationship with the adjacent communities in terms of floristic composition ; in particular the closest relationship was with the ravine forests. Using the DCA ordination technique, the score of AXIS 1 correlated most closely with temperature and altitude, while the score of AXIS 2 correlated most closely with topographical gradient which determined the soil water condition. The pattern of coordinate distribution of sample stands on AXIS 1 and AXIS 2 varied in relation to geology of mountains (Paleozoic system, Tertiary system, and Quaternary system). Generally speaking, in the Quaternary system there was the least community differentiation, while in the Paleozoic system there was the greatest community differentiation. In the Tertiary system the community differentiation was intermediate between that of the Quaternary and that of the Paleozoic. Our study also showed that changes in compositional differentiation corresponded to the variation in site conditions. In the Paleozoic system, which is geologically the oldest system, the compositional differentiation along topographical gradient was most remarkable. This was mainly due to the presence of the "Sohayaki" element plants in the ravine forests.

収録刊行物

  • 植生学会誌

    植生学会誌 13(2), 73-86, 1996

    植生学会

参考文献:  48件中 1-48件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    110008145183
  • NII書誌ID(NCID)
    AA11347548
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13422448
  • データ提供元
    CJP書誌  CJP引用  NII-ELS  J-STAGE 
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