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Abundance and Population Stability of Relict Butterfly Species in the Highlands of Mt. Hallasan, Jeju Island, South Korea

한라산 고지대에 서식하는 유존 나비종의 풍부도와 개체군 안정성

  • Kim, Sung-Soo (Research Institute for East Asian Environment and Biology) ;
  • Lee, Cheol Min (Division of Forest Ecology, Korea Forest Research Institute) ;
  • Kwon, Tae-Sung (Division of Forest Ecology, Korea Forest Research Institute)
  • 김성수 (동아시아환경생물연구소) ;
  • 이철민 (국립산림과학원 산림생태연구과) ;
  • 권태성 (국립산림과학원 산림생태연구과)
  • Received : 2013.03.19
  • Accepted : 2013.08.27
  • Published : 2013.12.01

Abstract

The number of mountain species that live in the highlands and are isolated from other populations will likely decline because of global warming. The present study was conducted to survey populations of 10 relict butterfly species living in the highlands of Mt. Hallasan, Jeju Island. Butterfly surveys were conducted for 6 years from 2007 to 2012 by using the line transect method. To test whether relict species occur in the lowlands, we surveyed butterflies at 2 reference sites in the lowlands in 2012. All the 10 relict species were observed at the highland sites, whereas they were not observed at the 2 lowland sites. Majority of the relict species surveyed are relatively abundant, and the stability of their populations did not differ from that of other butterfly species. When we analyzed the annual change in populations, compared to other species the relict species did not show any difference in population change. Hence, the influence of climate change is not yet apparent on the populations of relict butterfly species. We evaluated the vulnerability of each relict species on the basis of our results and occurrence data from South Korea.

지구온난화로 인해 고산지역에 고립되어 서식하는 고산종은 감소할 가능성이 높다. 본 연구는 한라산 고지대에 서식하는 10종의 유존 나비종의 서식실태를 파악하기 위해 수행되었다. 고지대의 나비조사는 한라산 정상부의 초지에서 2007년부터 6년간 실시하였다. 유존종의 나비가 저지대에 나타나는 지 확인하기 위해 2012년에는 저지대의 2곳에서 조사를 하였다. 나비는 선조사법으로 조사하였다. 10종의 유존 나비종들은 고지대에서는 관찰이 되었으나, 저지대에서는 관찰되지 않았다. 이들 종들은 대부분 개체수가 많고 개체군의 안정성이 다른 나비들에 비해 낮지 않았다. 밀도 변화를 분석한 결과 유존종의 나비들이 감소하거나 증가하는 경향은 나타나지 않았다. 따라서 기후변화의 영향은 아직은 유존 나비종의 개체군에 명확하게 나타나지는 않았다. 본 조사결과와 우리나라의 출현자료를 토대로 각 유존종에 대한 취약성 평가를 하였다.

Keywords

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