Attitudinal Distribution of Plant Communities at Donnaeko Valley in the Mt. Hallasan

To investigate the forest community structure ranging from 200 meters to 1,350 meters above sea level at Donnaeko valley of Mt. Hallasan in 2006, 15 plots were surveyed. According to the classification analysis by TWINSPAN, the plant communities were divided into five groups of Castanopsis sieboidii community, Castanopsis sieboldii - Quercus acuta community, mixed forest, Carpinus laxiflora - Quercus serrata community and deciduous broad-leaved forest. 22 species of evergreen broad-leaved trees such as Castanopsis sieboldii, Quercus acuta, Distylium racemosum, Camellia japonica, Eurya japonica, Ligustrum lucidum, Ilex crenata, Daphnipyllum macropodum, etc. were growing at Donnaeko valley. According to the attitudinal distribution of evergreen broad-leaved trees, Castanopsis sieboidii was a dominant species distributed from 200 meters to 350 meters above sea level, Castanopsis sieboldii and Quercus acuta were dominant species distributed from 400 meters to 600 meters above sea level and Quercus acuta was a dominant species distributed from 660 meters to 700 meters above sea level. Ilex crenata, Daphniphyllum macropodum, Elaeagnus glabra were distributed up to 1,350 meters above sea level in Donnaeko.

한라산 돈내코계곡의 해발고별 식물군집분포

한라산 돈내코계곡의 산림군집구조를 파악하기 위해 2006년에 해발 200m에서 1,350m 구간까지 15개소에서 식생을 조사하였다. TWINSPAN분석결과, 구실잣밤나무군집, 구실잣밤나무-붉가시나무군집, 혼효림, 서어나무-졸참나무군집, 낙엽활엽수림 등 5개의 식물군집으로 구분되었다. 산림군집의 수직적 분포를 살펴본 결과, 돈내코계곡에서 출현한 상록활엽수는 총 22종류로 구실잣밤나무, 붉가시나무, 조록나무, 동백나무, 사스레피나무, 제주광나무, 꽝꽝나무, 굴거리나무 등이었다. 상록활엽수 중 구실잣밤나무는 해발 200m부근부터 해발 350m부근까지, 구실잣밤나무와 붉가시나무가 우점하는 상록활엽수림은 해발 400m부근부터 해발 600m부근까지, 붉가시나무는 해발 650m부근부터 해발 700m부근까지 우점하고 있었으며, 꽝꽝나무, 굴거리나무, 보리장나무 등은 1,350m부근까지 분포하고 있었다.