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Vegetation Structure and Distributional Characteristics of Abies koreana Forests in Mt. Halla

한라산 구상나무림의 식생구조와 분포 특성

  • Song, Kuk-Man (Department of Biology, Jeju National University) ;
  • Kim, Chan-Soo (Warm-Temperate Forest Research Center, Korea Forest Research Institute) ;
  • Koh, Jung-Goon (Institute of Environmental Resource Research, Jeju Special Self-Governing Province) ;
  • Kang, Chang-Hun (Department of Biology, Jeju National University) ;
  • Kim, Moon-Hong (Department of Biology, Jeju National University)
  • 송국만 (제주대학교 생물학과) ;
  • 김찬수 (국립산림과학원 난대산림연구소) ;
  • 고정군 (제주특별자치도 환경자원연구원) ;
  • 강창훈 (제주대학교 생물학과) ;
  • 김문홍 (제주대학교 생물학과)
  • Received : 2009.06.23
  • Accepted : 2010.02.22
  • Published : 2010.04.30

Abstract

The purpose of the present study was to analyze the vegetation structure and distributional characteristics of Abies koreana forests in Mt. Halla, and to provide basicdata for an ecological study on Abies koreana in Mt. Halla. The results of the analysis showed that the mean importance percentage(M.I.P,) of Abies koreana in the Youngsil and Bangaeoreum and the Azalea field were 28.3%, 23.6%, and 46.4%, respectively. The ratios of DBH (diameter at breast height) to height were similar in all region, except in the Azalea field, where Abies koreana of various ages, both young and old, were found. The species diversity (H) of the upper and lower layers in the Youngsil and Bangaeoreum and in the Azalea field were 0.625 and 0.810, 0.731 and 0.848, and 0.342 and 0.757, respectively. A total of 52 community were distributed at locations higher than 1,300m above sea level. The proportions of each community in the whole Abies koreana forest were 56.5%(Azalea field), 11.0% (Youngsil trail at 1,550-1,650 m above sea level), and 8.1%(Janggumok and Kundurewat region). The total area of the Abies koreana forest was calculated to be 795.3ha by combining all the areas of each community. An Abies koreana forest with the largest area was found at locations 1,500-1,600 m above sea level, taking up 38.8% of the total Abies koreana forest area. For the slopes of the distributional area of Abies koreana, 46.1%(highest proportion) of the total area was $10\sim25^{\circ}$, and for the azimuth of the distributional area, 17.4%(the highest proportion) of the total area was $0-45^{\circ}$. The vegetation structure showed large differences between areas. It was found, however, that the distribution was mostly in the areas with a relatively gentle slope. It is suggested that research be done to forecast the possible changes in the differences in the vegetation structures between different areas caused by climate changes. In addition, there is a need to monitor the Abies koreana and alpine plants in the subalpine zones of Mt. Halla, which are sensitive to climate change, to obtain the basic data that are necessary for the protection and maintenance of the ecosystem.

Keywords

Vegetation structure;Distribution characteristics;Abies koreana;Importance value

Acknowledgement

Supported by : 환경부

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