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Physiological ecology of Polygonum cuspidatum at timberlin on Mt. Fuji.

Research Project

Project/Area Number 02640505
Research Category

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

Allocation TypeSingle-year Grants
Research Field 生態学
Research InstitutionShizuoka University

Principal Investigator

MASUZAWA Takehiro  Shizuoka University, Faculty of Science, Assistant professor, 理学部, 助教授 (40111801)

Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1991: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1990: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsTimberline of Mt. Fuji / Doughnut phenomenon / Succession / Alpine plants / photosynthesis / 光合成速度 / アレロパシ- / 森林限界 / 光合成
Research Abstract

The plant community in the vicinity of the timberline of Mt. Fuji is not in a stable climax stage. On the southeast side, bare land and communities of perennial herbaceous plants are widely distributed over an area extending downward from the vicinity of the Hoei Crater. In such situations, herbaceous perennial communities play an important role in the process of succession to a woody plant community. That is, in almost all cases on Mt. Fuji, the transfer from alpine grassland to forest starts with the invasion of woody plants into patches of P. cuspidatum and P. weyrichii. Therefore, it is assumed that these Polygonum patches offer an "place "in a process where by woody plants can established.
The respiration rate of the rhizomes at the central part of a P. cuspidatum patch was measured to find the relationship between rhizome activity and the low biomass of its central part. Respiration rates of about 1.3mg CO_2 at the peripheral part, and of about 0.5mg CO_2/g/h at the central part were obtained in August on large patch. There was similar tendency observed in September for the respiration of the rhizome in the peripheral part to be higher than in the central part.
Patch growth of harbaceous perennials has been studied with regard to Phragmites communis, Phragmites australis and Pteridium aquilinum. However, there have been no ecophysiological studies on patch structure according to patch size, especially on the activity of rhizome and soil development in the patch. In the present study it was found that the activity of the central part is lower than that of periphery. Although the cause remains to be clearly established, this is thought to result from the crowding and aging of the underground organ of the central part, which may cause the central biomass above ground to wither, and as a result, a doughnut phenomenon is brought about.

Report

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

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 増沢 武弘他: "Seasonal changes in the soil temperature over a threeーyear period at the timberlin on Mt Fuji" Reports of the Faculty of Science Shizuoka University. 25. 69-78 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 増沢 武弘他: "Dynamics of the buried seed populatin in the soil at the timberline on Mt.Fuji" Reports of the Faculty of Science Shizuoka University. 25. 79-83 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 増沢 武弘他: "富士山の極限環境に生きる植物たち" 富士山の極限環境に生きる植物たち. 1-55 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 増沢 武弘他: "The daily course of transpiration rate and stomatal conductance of Polygonumcuspidatum in Mt.Fuji" Reporto of Faculty of Science Shizuoka University. 26. 81-90 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Masuzawa, T.: "Seasonal changes in the soil temperature over three years period at the timberline on Mt. Fuji." Rep. of Fac, Science Shizuoka Univ.25. 69-78 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Masuzawa, T. et al: "Dynamics of the buried seed population in the soil at the timberline on Mt. Fuji." Rep. of Fac. Science Shizuoka Univ.25. 79-83 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 増沢 武弘,他: "The daily course of transpiration rate and stomatal conductance of Polygonum cuspidatum in Mt.Fuji" Reports of the Faculy of Science Shizuoka University. 26. 81-90 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Masuzawa Takehiro: "Seasonal changes in the soil temperature over a treeーyear period at the timberline on Mt.Fuji." Rep.of Fac.of SCi.,Shizuoka Univ.Vol.25,41ー50(1991). 25. 41-50 (1991)

    • Related Report
      1990 Annual Research Report

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

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