Abstract
천연기념물 제 432호 제주 상효동의 한란 자생지(39 ha)를 대상으로 2013년 10월부터 2014년 2월까지 생물(식물상, 식생다양성 및 임분 구조) 및 비생물 환경(미기상, 수관열림도, 임내 광량 및 토양 온 습도)의 특성을 분석하였다. 한란 자생지의 일평균온도(<TEX>$5.7^{\circ}C$</TEX>)는 서귀포시 보다 <TEX>$3.3^{\circ}C$</TEX> 낮았고, 일평균습도(75.8%)는 서귀포시 보다 15% 높았다. 토양 온도는 평균 <TEX>$16.5^{\circ}C$</TEX>, 토양습도는 평균 37.3%, 그리고 낙엽층 두께는 평균 4.3 cm이었다. 수관열림도 및 임내 광량의 평균은 각각 15.5%, 및 <TEX>$8.5mol{\cdot}m^{-2}{\cdot}day^{-1}$</TEX> 이었다. 한란 자생지 보호구역 내 관속식물은 총 221 분류군이며, 희귀 및 멸종위기식물로는 한란, 죽백란 및 꼬리족제비고사리 등이 확인되었다. 식생다양성 평가 결과, 구실잣밤나무군락 등 총 6개의 식생단위가 분석되었다. 조사구역의 임분구조는 구실잣밤나무가 가장 높은 밀도(1,777 개체/ha) 및 흉고단면적 (<TEX>$90.3m^2/ha$</TEX>)을 나타내었다. In the Natural Monument (No. 432) Jeju Sanghyo-dong Cymbidium kanran Habitat (39 ha), flora, vegetation diversity, stand structure, mirco-climate, canopy openness, light environment and soil temperature and moisture were quantified from Oct. 2013 to Feb. 2014. Compare to Seogwipo-si, daily mean temperature (<TEX>$5.7^{\circ}C$</TEX>) and moisture (75.8%) in study area were lower at <TEX>$3.3^{\circ}C$</TEX> and 15%, respectively. Mean soil temperature and moisture were <TEX>$16.5^{\circ}C$</TEX> and 37.3%, respectively, and mean litter layer depth (n = 81) was 4.3 cm. Mean canopy openness and light availability at forest floor were 15.5% and <TEX>$8.5mol{\cdot}m^{-2}{\cdot}day^{-1}$</TEX>, respectively. Total of 22 species including vascular and bryophyte plants and 6 vegetation group were observed. Castanopsis siebildii was dominant species in study area, and density and basal area were 1,777 stem/ha and <TEX>$90.3m^2/ha$</TEX>.
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