Potential Habitats and Change Prediction of Machilus thunbergii Siebold & Zucc. in Korea by Climate Change

기후변화에 따른 한반도 후박나무의 잠재 생육지 및 변화예측

  • Yun, Jong-Hak (Plant Resources Division, National Institute of Biological Resource) ;
  • Nakao, Katsuhiro (Department of Plant Ecology, Forestry and Forest Products Research Institute) ;
  • Park, Chan-Ho (Plant Resources Division, National Institute of Biological Resource) ;
  • Lee, Byoung-Yoon (Plant Resources Division, National Institute of Biological Resource)
  • Received : 2011.10.17
  • Accepted : 2011.12.01
  • Published : 2011.12.31

Abstract

The research was carried out in order to find climate factors which determine the distribution of Machilus thunbergii, and the potential habitats under the current climate and three climate change scenario by using classification tree (CT) model. Four climate factors; the minimum temperature of the coldest month (TMC), the warmth index (WI), summer precipitation (PRS), and winter precipition (PRW) : were used as independent variables for the model. The model of distribution for Machilus thunbergii (Mth-model) constructed by CT analysis showed that minimum temperature of the coldest month (TMC) is a major climate factor in determining the distribution of M. thunbergii. The area above the $-3.3^{\circ}C$ of TMC revealed high occurrence probability of the M. thunbergii. Potential habitats was predicted $9,326km^2$ under the current climate and $61,074{\sim}67,402km^2$(South Korea: $58,419{\sim}61,137km^2$, North Korea: $2,655{\sim}6,542km^2$) under the three climate change scenarios (CCCMA-A2, CSIRO-A2, HADCM3-A2). The Potential habitats was to predicted increase by 51~56%(South Korea: 49~51%, North Korea: 2~5%) under the three climate change scenarios. The potential expand of M. thunbergii habitats has been expected that it is competitive with warm-temperate deciduous broadleaf forest. M. thunbergii is evaluated as the indicator of climate change in Korea and it is necessary for M. thunbergii to monitor of potential habitats.

본 연구는 기후변화에 따른 한반도 후박나무의 분포를 규정하는 기후요인과 현재기후와 미래기후에서의 잠재 생육지를 CT모델을 이용하여 예측하였다. 모델 구축을 위한 4개 독립변수로는 최한월최저기온(TMC), 온량지수(WI), 하계강수량(PRS), 동계강수량(PRW)을 사용하였다. CT분석을 통해 구축된 후박나무 분포 모델(Mth-model)에서 TMC(최한월최저기온)가 분포를 규정하는 주요요인으로 작용하였으며, TMC(최한월최저기온) $-3.3^{\circ}C$이상인 지역에서 후박나무의 높은 출현확률을 나타냈다. 현재기후에서 한반도 후박나무의 잠재 생육지(PH)는 $9,326km^2$로 예측되었으며, 3종류 미래기후 시나리오(CCCMA-A2, CSIRO-A2, HADCM3-A2)에서 $61,074{\sim}67,402km^2$(남한: $58,419{\sim}61,137km^2$, 북한:$2,655{\sim}6,542km^2$)로 예측되었다. 미래기후에서 잠재 생육지는 49~51%(남한: 49~51%, 북한: 2~5%) 증가된 면적이 예측되었다. 기후변화에 따라 한반도 후박나무의 잠재 생육지의 확대는 난온대 낙엽활엽수림과 경쟁이 예상된다. 후박나무는 한반도 기후변화 지표종으로 유효하다고 판단되며 잠재 생육지에 대한 지속적인 모니터링이 중요하다.

Keywords

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