Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Distributional Characteristics and Population Dynamics of Endangered Plant, Paeonia obovata Maxim.

멸종위기야생식물인 산작약(Paeonia obovata Maxim.)의 분포특성과 개체군 동태

  • Kim, Young Chul (Department of Biology, Gangneung-Wonju National University) ;
  • Chae, Hyun Hee (Department of Biology, Gangneung-Wonju National University) ;
  • Lee, Kyu Song (Department of Biology, Gangneung-Wonju National University)
  • 김영철 (강릉원주대학교 생물학과) ;
  • 채현희 (강릉원주대학교 생물학과) ;
  • 이규송 (강릉원주대학교 생물학과)
  • Received : 2016.03.08
  • Accepted : 2016.07.29
  • Published : 2016.08.30
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Abstract

The environmental characteristics of the habitats, the population structures, ecological niche, life traits and the population demography are used as an essential informations to the effective conservation plans about the target species. We first confirmed a total of 37 populations through 12 years of investigation on the extents, and investigated the environmental factors of habitats and the population structures of the 25 cohorts in 12 regions among them. And, we investigated the population dynamics targeting at 8 cohorts in the population of Daegwanryeong-myeon, Pyeongchang-gun, Gangwon-do. Along with this, we conducted 4 years of cultivation experiments and how pollinators affect the success of reproduction. The results shows that the Paeonia obovata Maxim. was found in a relatively wide range of habitats. For the population structures of the 25 cohorts, there were considerable differences among cohorts, including a case which showed relative stable structure and an extreme case in which only adults were found. The factor that affected the population dynamics during the investigation was thought as a forest gap created in the tree layer. In the cultivation experiment, seedlings grew well in a less soil organic matter. The seed setting rate and the number of seeds generated by visiting pollinators were higher trends. In conclusion, to understand the distribution of the Paeonia obovata Maxim., there needs to be investigated on the other factors that are involved in dispersal factors other than environmental factors, and thus we suggest the necessity of the research on the dispersal vectors. The current Paeonia obovata Maxim. population was thought as a process of expansion after the rapid reduction of the extents in the past. For the effective conservation of the Paeonia obovata Maxim., an endangered plant, we recommend to understand the species through the spatio-temporal expansion, and maintain the health of the ecosystem based on it.

분포지의 환경특성, 개체군구조, 생태적지위, 생활사 특성 그리고 개체군 통계적 연구는 효과적인 보전을 위해 필수적인 정보이다. 우리는 12년간의 분포조사를 통해 총 37개의 분포지를 확인하였고 그중 12개 지역에 있는 25개의 집단을 대상으로 생육지의 환경과 개체군 구조를 조사하였다. 강원도 평창군 대관령면의 8개 집단을 대상으로 4년간에 걸친 개체군동태를 조사하였다. 4년간의 재배실험과 화분매개곤충의 영향을 관찰하였다. 조사결과 산작약은 비교적 넓은 식생환경에 걸쳐 분포하였다. 조사가 이루어진 25개 집단의 개체군 구조는 비교적 안정적인 집단과 극단적으로 성체만이 존재하는 집단 등 상당한 차이를 나타내었다. 조사기간 동안 상층식생에 생성된 숲 틈이 개체군 동태에 영향을 미치는 요인으로는 추정되었다. 재배실험에서 유묘는 토양의 유기물이 상대적으로 적은 곳에서 잘 성장하였다. 화분매개곤충의 방문이 결실한 종자의 수와 결실률에서 높게 나타나는 경향이 있었다. 결론적으로, 산작약의 분포는 환경적 요인과 더불어 분포에 관여하는 다른 요인의 연구가 필요하며 그 중에서 종자의 운반체에 대한 연구의 필요성을 제안하였다. 현재의 산작약 개체군은 과거 급격한 분포지의 감소 이후 확대되는 과정으로 평가되었다. 멸종위기야생식물인 산작약의 효과적인 보전을 위해서는 시공간적 확장을 통한 종에 대한 이해와 이를 바탕으로 한 생태계의 건강성 유지를 제안하였다.

Keywords

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