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Differentiation of topo-communities along topographical gradients

Research Project

Project/Area Number 02640503
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 生態学
Research InstitutionCHIBA UNIVERSITY

Principal Investigator

OHSAWA Masahiko  Faculty of Science, Chiba University, Professor, 理学部, 教授 (80092477)

Project Period (FY) 1990 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1992: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1991: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1990: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywordstopography / topo-community / competitive exclusion / species competition / dynamic unit / patch dynamics / landslide / パッチ・ダイナミクス / 常緑広葉樹林 / 地形的極相 / 清澄山
Research Abstract

The present study intended to clarify the differentiating pattern of vegetation and its controlling factors along topographical environmental gradients. The plant communities or patches which are differentiated through topographical environmental factors, such as soil moisture status, soil nutrients, soil depth, and stability of soil surface materials etc. have decisive effect on the nature of plant community on a certain site on the gradient, under the prevailing macro-climatic conditions.
In the subtropical/warm-temperate zone, for example, the climax forests are dominated by evergreen notophyllous trees such as Castanopsis cuspidata var. sieboldii, Machilus thunbergii and Quercus spp. In a mesoscale topographical habitat preference, crest slope is covered by the evergreen notophyllous trees, rocky ridge is exclusively dominated by conifers such as Tsuga sieboldii, Pinus densiflora, and Pinus parviflora, and lower slope near the valley bottom is dominated by deciduous trees such as Euptelea polyandra, Morus etc. An interesting pattern of community differentiation can be observed on a specific habitats such as small peak within a mountainous area or in a small island, narrow ridge top, top of windward slope, etc., which are specifically covered by a microphyllous community dominated by Eurya spp., Symplocos spp, and Ilex spp., etc. They are competitively inferior to the notophyllous community. And the microphyllous trees become dominant when the growth or performance of the notophyllous trees, which are more sensitive against environmental stresses, are suppressed. Thus the topographical habitat itself has a general competitive hierarchy that is preferred successively by different ecological groups having various adaptational traits.

Report

(4 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • 1990 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] SAKAI,A.& OHSAWA,M: "Vegetation pattern and microtopography on a landslide scar of Mt.Kiyosumi,central Japan" Ecolojical Research. 8. (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] OHSAWA,M: "Forest pattern along hierarchical habitat gradienys in east Asia" Biology International,IUBS Special issue. (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] OHTSUKA,T.& OHSAWA,M: "Early herbaceous succession along topographical gradient on forest clear-felling sites in mountaineous terrain,central Japan" Ecolojical Research.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 大沢 雅彦,尾崎 煙雄: "東アジアにおける亜熱帯・暖温帯常緑広葉樹林域の植生/環境パターンのヒエラルキー分析" 日本生気象学会雑誌. 29.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 大沢 雅彦(松井 健ほか編): "丘陵地の自然環境-その特性の保全-(担当微地形と植生)" 古今書院, 202 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Sakai, A. & Ohsawa, M.: "Vegetation pattern and microtopography on a landslide scar of Mt. Kiyosumi" central Japan. Ecological Research. 8. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Ohsawa, M.: "Forest pattern along hierarchical habitat gradients in east Asia. Biology International" Special issue (IUBS). (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Ohsawa, M. & Ozaki, K.: "Hierarchical analysis of vegetation/environment pattern for east Asian extra-tropical evergreen broad-leaved forests." Japanese Journal of Biometeorology. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Ohtsuka, T. & Ohsawa, M.: "Early herbaceous succession along topographical gradient on forest clear-felling sites in mountanous terrain," central Japan. Ecological Research.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Sakai,A.&Ohsawa,M.: "Vegetation pattern and microtopography on a landslide scar of Mt.Kiyosumi,central Japan" Ecological Research. 8. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] Ohtsuka,T.&Ohsawa,M.: "Early herbaceous succession along topographical gradient on forest clear-felling sites in mountaineous terrain,central Japan" Ecological Research.

    • Related Report
      1992 Annual Research Report
  • [Publications] 大沢 雅彦(松井 健 ほか編): "丘陵地の自然環境-その特性と保全-" 古今書院, 202 (1990)

    • Related Report
      1992 Annual Research Report
  • [Publications] Imai,A. & Ohsawa,M.: "Vegetation pattern and microtopography on a landslide scar of Mt.Kiyosumi,central Japan" Ecological Research.

    • Related Report
      1991 Annual Research Report
  • [Publications] Ozaki,K. & Ohsawa,M.: "Vegetational and regeneratire pattern of temperate conifers along topographical gradients" Ecological Research.

    • Related Report
      1991 Annual Research Report
  • [Publications] Ohtsuka,Y. & Ohsawa,M.: "Vegetational pattern in relation to microーlandforms in valley heads of montane deciduous forest zone" Ecological Research.

    • Related Report
      1991 Annual Research Report
  • [Publications] 松井 健 ほか編,大沢 雅彦: "丘陸地の自然環境ーその特性と保全ー(担当微地形と植生)" 古今書院, 202 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] Imai,A.& Ohsawa,M.: "Microtopographical disturbance regime and vegetation pattern in a landslide slope in mountainous terrain" Ecological Research.

    • Related Report
      1990 Annual Research Report
  • [Publications] Ozaki,K.& Ohsawa,M.: "Vegetational and regenerative pattern of temperate conifers along topographical gradients" Ecological Research.

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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