Vegetation Characteristics of Evergreen Broad-Leaved Forest in the Duryunsan Provincial Park1a -Focusing on the Daeheungsa(Temple) Area-
본 연구는 낙엽활엽수와 상록활엽수가 혼효하는 곳으로 식물학적 가치가 높은 두륜산도립공원 일대의 상록활엽수림을 대상으로 식생 특성을 파악하고자 진행하였다. 식생 특성을 알아보기 위해 100㎡ 크기의 조사구 40개소를 설치하여 조사·분석 하였다. 두륜산도립공원이 위치한 해남군은 난대림지역으로 40년간의 기상자료를 분석한 결과, 한랭지수 –8℃․월, 온량지수 109.2℃․월, 연평균강수량 1,310.5㎜로 상록활엽수림의 분포적지라 할 수 있다. TWINSPAN에 의한 군락분류 결과, 붉가시 나무군락-Ⅰ, 붉가시나무군락-Ⅱ, 참식나무-푸조나무군락 총3개 군락으로 분리되었다. 두륜산도립공원 내 상록활엽수림은 교목층에 우점하고 있는 붉가시나무가 아교목층에서도 세력을 넓혀가고 있으며, 붉가시나무 외에 교목성상의 상록활엽수인 참식나무와 생달나무 등이 전 층위에서 확인되고 있는 형태로 굴참나무, 졸참나무, 개서어나무 등의 낙엽활엽수가 도태되고 상록활엽수인 붉가시나무군락으로의 천이가 진행되고 있으며, 국지적으로 참식나무군락이 출현하고 있었다. 종다양도는 붉가시나무군락-Ⅰ(1.3208), 붉가시나무군락-Ⅱ(1.4916)에 비해 참식나무-푸조나무군락(1.0798)이 낮게 나타났다.
The purpose of this study was to investigate vegetation characteristics of evergreen broad-leaved forests in the area of Duryunsan Provincial Park, where the deciduous broad-leaved trees and evergreen broad-leaved trees are mixed and thus had a high botanical value. To investigate the vegetation characteristics, we installed 40 quadrats with an area of 100 ㎡ each for survey and analysis. Haenam-gun, where the Duryunsan Provincial Park is located, is a warm-temperate forest region. The meteorological data for the past 40 years showed a coldness index of -8℃, a monthly warmth index of 109.2℃, and annual mean precipitation of 1,310.5㎜, indicating it is an ideal habitat for the distribution of evergreen broad-leaved forest. The results of community classification based on TWINSPAN showed three categories of vegetation communities in the surveyed region: Quercus acuta community-Ⅰ, Q. acuta community-Ⅱ, and Neolitsea sericea-Aphananthe aspera community. In the evergreen broad-leaved forest in the Duryunsan Provincial Park, Q. acuta dominant in the canopy were expanding their presence in the understory. In addition to the Q. acuta, N. sericea and Cinnamomum yabunikkei, which are evergreen broad-leaved trees of the canopy, were found in all layers. The deciduous broad-leaved trees such as Q. variabilis, Q. serrata, and Carpinus tschonoskii were culled, and the transition to Q. acuta evergreen broad-leaved trees was ongoing. N. sericea community appeared locally. The species diversity index of N. sericea-A. aspera community was lower at 1.0798 than that of Q. acuta Community-Ⅰ at 1.3208 and Q. acuta Community-Ⅱ at 1.4916.