Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Habitats Environmental and Population Characteristics of Iris koreana Nakai, a Rare and Endemic Species in Korea

한반도 희귀·특산식물 노랑붓꽃의 자생지 환경 및 개체군 특성

  • 피정훈 (국립수목원 산림자원보존과) ;
  • 박정근 (국립수목원 산림자원보존과) ;
  • 정지영 (국립수목원 산림자원보존과) ;
  • 박정석 (국립수목원 산림자원보존과) ;
  • 서강욱 (국립수목원 산림자원보존과) ;
  • 손성원 (국립수목원 산림자원보존과)
  • Received : 2016.01.21
  • Accepted : 2016.06.10
  • Published : 2016.06.30
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Abstract

The sustainability of Iris koreana, a rare and endemic plant designated by the Korea Forest Service, is threatened due to artificial factors such as habitats loss and climate change etc. and internal factors such as changes in biological properties of the habitats etc. but conservation biology research has not been performed in South Korea. The objective of this study is to establish the species conservation strategies by analyzing the characteristics of their habitats, including: 1) Population characteristics, and 2) habitat analysis of the vegetation and abiotic environments. From April to May, 2015, population characteristics [density (stems $m^{-2}$), flowering rate (%) and leaf area size ($cm^2$)] in I. koreana habitats such as Buan1~6 (BA1~6), Jangseong1~2 (JS1~2) and vegetation characteristics (phytosociological research and ordination analysis), and abiotic environments [soil temperature ($^{\circ}C$), soil humidity (%), transmitted light ($mol{\cdot}m^{-2}{\cdot}d^{-1}$) and canopy openness (%)] were measured. I. koreana was mainly distributed at elevation 50 to 150 m and 2 to $11^{\circ}$ slope. Slope direction was shown as 90 to $193^{\circ}$. The average degree of canopy openness was 11.9%. It showed the highest at BA2 (17.5) and the lowest at JS1 (7.7). The average degree of transmitted light was $6.3mol{\cdot}m^{-2}{\cdot}d^{-1}$. It showed the highest at BA2 (10.1) and the lowest at JS1 (3.6). Population density showed average 25.8 (stems $m^{-2}$). It showed the highest at JS2 (19.7) and the lowest at JS1 (9.3). flowering stems showed average 16.9 (stems). It showed the highest at BA3 (35) and the lowest at BA5 (4). Leaf area size was average $94.1cm^2$.

노랑붓꽃은 주로 해발 50~150 m, 경사는 $2{\sim}11^{\circ}$의 범위에 분포하였다. 또한 대부분의 노랑붓꽃자생지는 산지계류 하천에 위치하고, 수로를 따라 인접한 경계면에 띠상으로 분포하거나 상부사면에 점의 형태로 분포하는 경향이었다. 수관열림도 (%)는 평균 11.97이었으며, BA2에서 가장 높게 나타났고, JS1에서 가장 낮게 나타났다. 광량 ($mol{\cdot}m^{-2}{\cdot}d^{-1}$)은 평균 6.34이었으며, BA2에서 가장 높게 나타났고 JS1에서 가장 낮게 나타났다. 개체밀도 (/$m^2$)는 평균 25.81이었으며, JS2에서 49.65으로 가장 높았고 JS1에서 9.3으로 가장 낮았다. 개화촉수는 BA3에서 가장 많았고, BA5에서는 가장 적게 나타났다. 개체군특성과 환경요인 사이의 상관관계분석 결과, 광량과 수관열림도가 높은 곳에서 노랑붓꽃의 촉수가 많이 출현하는 것으로 나타났다. 엽면적을 분석한 결과, 전체적으로 역-J자 형태를 나타내어, 지속적으로 작은 개체들이 이입하고 있는 것으로 나타났다. 우리의 연구결과는 개체군 동태 예측 및 노랑붓꽃의 장기적인 보전전략을 마련하는 데 중요한 기초자료로 활용될 것으로 생각된다.

Keywords

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