Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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The Correlation Analysis between Occurrence of Seedlings of Korean fir (Abies koreana E.H. Wilson) and Understory on the Eastern Slope of Mt. Halla

한라산국립공원 동사면의 구상나무숲 내 주요 하층식물이 구상나무 유묘 발생에 미치는 상관성 분석

  • Received : 2021.03.19
  • Accepted : 2021.04.28
  • Published : 2021.10.01
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Abstract

This study was carried out to investigate the occurrence of seedlings of Korean fir (Abies koreana) in Korean fir forest located on the eastern slope of Mt. Halla National Park. Between June and August in 2016, the systematic sampling method was applied to 125 plots of 5 m × 5 m quadrats and field survey was came out to measure the characteristics of sites and understory vegetation. Correlation analysis was applied to the variables quantified from the data collected. Total number of flora found at the study site is 31 in families, 44 in genera, and 56 in species. The main lower layer vegetation was investigated such as Jeju dwarf bamboo, Toothed club moss (Lycopodium serratum), Pacific fir moss (Lycopodium chinense), Climbing hydrangea (Hydrangea petiolaris) etc. Among these plant species, the vegetation which had a high positive correlation with the frequency and the coverage of seedlings of Korean fir were Jeju dwarf bamboo, Toothed club moss and Pacific fir moss.

본 연구는 한라산국립공원 동사면에 위치한 구상나무숲에서 구상나무의 유묘 및 치수발생 현황을 파악하기 위하여 수행되었다. 2016년 6 ~ 8월 사이에 5 × 5m 방형구 125곳을 대상으로 계통추출법을 적용하여 임황, 지황, 구상나무 유묘와 치수 발생 현황과 발달 상황 및 제주조릿대를 비롯한 하층식생 등에 대한 조사를 실시하였고, 수집된 자료를 중심으로 상관분석을 실시하였다. 조사한 전체 125개 방형구 중에서 유묘가 나타난곳은 43.2%인 54개 방형구에서 616개체 발견되었다. 71개 방형구에서는 유묘를 확인하지 못하였으며, 각 방형구의 유묘 개체수는 평균4.9개로, 치수발생은 거의 없는 것으로 나타났다. 조사된 전체 125개 방형구 내의 주요 식물종은 31과 44속 56종으로 조사되었으며, 상층목으로는 구상나무, 마가목, 산개벚지나무, 주목 등이 주요 우점종으로 파악되었다. 주요 하층식생은 제주 조릿대, 뱀톱, 다람쥐꼬리 및 등수국 등이 조사되었다. 이들 식물 중에서 구상나무 유묘의 빈도와 피도에 대해서 높은 양의 상관이 있는 식생은 제주조릿대, 뱀톱, 다람쥐꼬리 순으로 나타났다. 구상나무 유묘의 빈도 및 피도는 제주조릿대의 빈도 및 피도와 양의 상관이 있는 것이었는데, 이는 구상나무의 유묘는 제주 조릿대의 피도가 높은 곳에 더 많이 나타나는 것으로 추정할 수 있으며, 이에 대한 추가적인 연구가 필요한 것으로 생각된다. 본 연구를 통해서 한라산국립공원 동사면 구상나무숲 내에서 구상나무 유묘의 발생은 이루어지고 있으나 치수로 발달하는 과정에서 교란이 일어나는 것이 파악되었고, 구상나무 유묘 발생 및 치수 발달에 교란을 야기하는 한 가지 요인으로 유제류에 의한 섭식일 가능성을 추정해 볼 수 있다. 따라서 유제류 섭식 등의 연구를 추후 한라산 전반에 걸쳐 유묘 및 치수의 발생 현황을 파악하고, 식생 천이와 생태계 발달 상황을 모니터링하며, 그 교란 원인을 파악하여, 구상나무의 천연갱신이 원활하게 일어나도록 하는 것은 우리나라 특산식물인 구상나무를 보전함에 핵심적으로 중요한 사항이라고 할 수 있다.

Keywords

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