Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Effects of elevation and canopy openness on a dwarf bamboo (Sasa quelpaertensis Nakai) vegetation and their consumer communities

고도와 수관부 유무가 제주조릿대 군락과 소비자 군집에 미치는 영향

  • Lee, Jin (Division of Restoration Research, Research Center for Endangered Species, NIE) ;
  • Lee, Jae-Young (Department of Environmental Education, Mokpo National University) ;
  • Jang, Beom-Jun (Department of Environmental Education, Mokpo National University) ;
  • Jeong, Gilsang (Division of Climate & Ecology, NIE) ;
  • Choi, Sei-Woong (Department of Environmental Education, Mokpo National University)
  • 이진 (국립생태원 멸종위기종복원센터 복원연구실) ;
  • 이재영 (목포대학교 환경교육과) ;
  • 장범준 (목포대학교 환경교육과) ;
  • 정길상 (국립생태원 기후변화연구실) ;
  • 최세웅 (목포대학교 환경교육과)
  • Received : 2019.06.24
  • Accepted : 2019.07.14
  • Published : 2019.09.30
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Abstract

We investigated the tritrophic interactions associated with elevation and openness of dwarf bamboo (Sasa quelpaertensis Nakai) vegetation on Mt. Halla, Jeju Island. The interactions between dwarf bamboo plants and its consumers were investigated in four study sites with and without canopy along the elevation gradient. The ecological traits of dwarf bamboo included leaf area, water content, nitrogen content and carbon/nitrogen ratio. Arthropods were collected using a sweeping net and they were later divided into three different feeding guilds: herbivorous, omnivorous and predators. We found that the elevation and canopy openness on dwarf bamboo vegetation was positively related and as elevation increased and canopy opened, the bamboo densities and C/N ratio increased. However, the leaf area, water content and the N content decreased. The study sites with closed canopy indicated a relatively higher species richness of arthropods including insects. We concluded that the tritrophic interactions is closely related to the ecological characteristics of the dwarf bamboos, which is affected by elevation and canopy openness.

이 연구에서는 한라산을 포함한 제주도 전역에서 높은 밀도로 자라고 있는 제주조릿대(Sasa quelpaertensis Nakai)가 서식지 고도와 수관부 개폐 여부에 따라서 나타나는 식물의 생태학적 특성과 소비자 군집 다양성 변화에 영향을 받는가를 알아보았다. 고도와 상부 식생의 유무에 따라 제주조릿대 군락 네 지점을 선정한 후 각 지점에서 자라고 있는 제주조릿대 식물 특성 그리고 소비자 군집 다양성을 통하여 삼중영양 상호작용(Tritrophic interaction)을 조사하였다. 조사결과, 고도가 증가하면서 상부 식생이 없어지고 제주조릿대의 잎 면적, 수분함량, 질소함량은 감소하였으며, 밀도와 C/N함량은 증가하였다. 상부 식생이 존재할수록 제주조릿대의 생육특성은 더 좋아졌으며 이를 기주로 하는 초식곤충과 포식자가 증가하였다. 따라서 제주조릿대의 생육조건은 고도에 따른 주변 수관부 개폐와 밀접한 관련을 가지고 있으며 이러한 조건은 소비자 군집과도 밀접한 관련이 있는 것으로 생각한다.

Keywords

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