• Title/Summary/Keyword: point-centered quarter sampling method

Search Result 3, Processing Time 0.024 seconds

The Classification of Forest by Cluster Analysis in the Natural Forest of the Southern Region of Baekdudaegan Mountains (Cluster 분석에 의한 백두대간 남부권역 천연림의 산림 분류)

  • Lee, Jeong-Min;Hwang, Kwang-Mo;Kim, Ji-Hong
    • Journal of Korean Society of Forest Science
    • /
    • v.103 no.1
    • /
    • pp.12-22
    • /
    • 2014
  • This study was carried out to classify forest communities and to aggregate forest cover types for the complex and diversified natural forest areas of Hwangaksan, Bakseoksan, Deogyusan, and Jirisan in southern region of Baekdudaegan Mountains. The vegetation data were collected by point-centered quarter sampling method. Eight hundred fifty one sample points were subjected to cluster analysis to classify 18 forest communities, which were aggregated into 7 representative forest cover types on the basis of community similarity from composition of canopy species. They were mixed mesophytic forest cover type, the others deciduous forest cover type, Quercus variabilis-Quercus serrata cover type, Quercus mongolica cover type, Pinus densiflora cover type, Carpinus laxiflora cover type, and Abies koreana cover type. The Quercus mongolica cover type was most widely distributed in the study areas, and this cover type tended to occur in the place of higher altitude as latitude was getting lower. Mixed mesophytic forest and the others deciduous forest cover type were commonly distributed in the areas of valley, on the other hand, Quercus mongolica cover type and Pinus densiflora cover type tended to be distributed in the areas of ridge.

The Evaluation of Correlation between Disturbance Intensity and Stand Development by Natural Forest Community Type Classification (자연림 군집형 분류에 의한 교란의 정도와 임분 발달 사이의 관련성 검토)

  • Kim, Ji Hong;Hwang, Kwang Mo;Kim, Se Mi
    • Journal of Forest and Environmental Science
    • /
    • v.29 no.3
    • /
    • pp.219-225
    • /
    • 2013
  • The correlation between disturbance intensity and stand development was evaluated on the basis of natural forest community type classification in areas of Baekhaksan (more disturbed area) and Hwangaksan (less disturbed area). The vegetation data were collected by point-centered quarter sampling method, and they were subjected to cluster analysis for classifying community types and to analysis of species composition and species diversity for reviewing ecological characteristics. By the method of cluster analysis, natural forests of Baekhaksan were classified into Quercus forest community, Pinus densiflora community, Q. variabilis community, and Q. mongolica community. Those of Hwangaksan were divided into P. densiflora community, Q. mongolica community, Q. forest community, and Mixed mesophytic community. It is presumed that more developed and less disturbed forest area shows multiple species community pattern and more diversified structure than less developed and more disturbed forest area. In Korean peninsula, the abundance of red pine may play an important indicator to estimate the developmental pattern of the forest after artificial disturbance. The overall evaluation indicated that less disturbed Hwangaksan area had more developed stand pattern with mixed mesophytic community, more complicated species composition, and higher species diversity than Baekhaksan area.

The Classification and Species Diversity of Forest Cover Types in the Natural Forest of the Middle Part of Baekdudaegan (백두대간 중부권역 천연림의 산림피복형 분류와 종다양성)

  • Hwang, Kwang-Mo;Chung, Sang-Hoon;Kim, Ji-Hong
    • Journal of Korean Society of Forest Science
    • /
    • v.104 no.1
    • /
    • pp.14-25
    • /
    • 2015
  • This study was carried out to classify forest communities and to aggregate forest cover types for the complex and diversified natural forest areas of Guryongsan, Sobaeksan, Baekhwasan, Sokrisan, and Baekhaksan in the middle part of Baekdudaegan. The vegetation data were collected by point-centered quarter sampling method. One thousand one hundred fourteen sample points were subjected to cluster analysis to classify 27 forest communities, which were aggregated into 7 representative forest cover types on the basis of community similarity from composition of canopy species. They were Quercus mongolica forest cover type, mixed mesophytic forest cover type, Q. variabilis forest cover type, Pinus densiflora forest cover type, the others deciduous forest cover type, Q. serrata forest cover type, and subalpine forest cover type. The Q. mongolica forest cover type was most widely distributed in the study areas. It was assumed that abundance of Q. mongolica might be negatively associated with species diversity. Mixed mesophytic forest cover type and the others deciduous forest cover type were commonly distributed in the areas of valley, on the other hand, Q. mongolica cover type and P. densiflora cover type tended to be distributed in the areas of ridge.