• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1996 Fiscal Year Final Research Report Summary

A General Theory for Species Coexistence in Various Forests : the Diffusion Model for Plant Communities

Research Project

Project/Area Number 06640822
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 生態
Research InstitutionHOKKAIDO UNIVERSITY (1996)
The University of Tokyo (1995)
Tokyo Metropolitan University (1994)

Principal Investigator

HARA Toshihiko  Hokkaido Univ., Institute of Low Temperature Science, Professor, 低温科学研究所, 教授 (80183094)

Project Period (FY) 1994 – 1996
Keywordscompetition / asymmetric competition / symmetric competition / succession / coniferous trees / broad-leaved trees / diffusion model / size structure
Research Abstract

I investigated growth dynamics, competition and recruitment processes in the following climax forests : sub-boreal forest on Mt.Taisetsu, Hokkaido (Abies sachalinensis, Picea yezoensis), warm-temperate forest in Miyakejima island, Tokyo (Castanopsis cuspidata), sub-alpine forest on Mt.Kitayatsugatake in Shinshu (Abies veitchii, A.mariesii) ; and in an early-successional Betula ermanii forest in Ashibetsu, Hokkaido. I analyzed the growth data based on the diffusion model (Hara 1984), and found that (i) in the climax forests, both intra-and interspecific competition between canopy trees was much weaker than that between saplings and the mode of competition was usually symmetric ; (ii) sapling recruitment process was determined by the species-specific combination of stand structural attributes such as fallen-log abundance, Sasa density in the forest floor ; (iii) in the early-successional Betula ermanii forest, competition between canopy trees was intense and asymmetric ; (iv) these results obtained in the field were confirmed by the canopy photosynthesis model, i.e.broad-leaved trees tend to show intense and asymmetric competition while coniferous trees weak and symmetric competition ; (v) it was shown by a theoretical model that the effect of disturbances on spatial pattern dynamics of plant communities is larger under symmetric competition than under asymmetric competition ; (vi) it was concluded that growth and spatial pattern dynamics are governed by deterministic factors (competition) in early-successional forests while these are governed by stochastic factors (disturbances) in climax forests.

  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Yokozawa, M.: "Foliage profile,size structure and stem diameter-plant height relationship in crowded plant populations" Annals of Botany. 76. 271-285 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hara, T.: "Tree competition and species coexistence in a cool-temperate old-growth forest in southwestern Japan" Journal of Vegetation Science. 6. 565-574 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kubota, Y.: "Tree competition and species coexistence in a sub-boreal forest,northern Japan" Annals of Botany. 76. 503-512 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hara, T.: "Dynamic process,spatial pattern and species coexistence in plants" Folia Geobotanica et Phytotaxonomica. 30. 529-533 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kubota, Y.: "Allometry and competition between saplings of Picea jezoensis and Abies sachalinensis in a sub-boreal coniferous forest,northern Japan." Annals of Botany. 77. 529-537 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yokozawa, M.: "Crown architecture and species coexistence in plant communities" Annals of Botany. 78. 437-447 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kubota, Y.: "Recruitment processes and species coexistence in a sub-boreal forest in northern Japan." Annals of Botany. 78. 741-748 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yokozawa, M.: "Effects of competition mode on spatial pattern dynamics in plant communities" Ecological Modelling. (in press.). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yokozawa, M.& Hara, T.: "Foliage profile, size structure and stem diameter-plant height relationship in crowded plant populations." Ann.Bot.76. 271-285 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hara, T., Nishimura, N.& Yamamoto, S.: "Tree competition and species coexistence in a cool-temperate old-growth forest in southwestern Japan." J.Veg.Sci.6. 565-574 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kubota, Y.& Hara, T.: "Tree competition and species coexistence sub-boreal forest, northern Japan." Ann.Bot.76. 503-512 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hara, T.: "Dynamic process, spatial pattern and species coexistence in plants." Folia Geobot.Phytotax.30. 529-533 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kubota, Y.& Hara, T.: "Allometry and competition between saplings of Picea jezoensis and Abies sachalinensis in a sub-boreal coniferous forest, northern Japan." Ann.Bot.77. 529-537 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yokozawa, M., Kubota, Y.& Hara, T.: "Crown architecture and species coexistence in plant communities." Ann.Bot.78. 437-447 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kubota, Y.& Hara, T.: "Recruitment processes and species coexistence in a sub-boreal forest in northern Japan." Ann.Bot.78. 741-748 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yokozawa, M., Kubota, Y.& Hara, T.: "Effects of competition mode on spatial pattern dynamics in plant communities." Ecol.Modelling.(in press). (1997)

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

URL: 

Published: 1999-03-16  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi