Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Distribution Model of the Wintering Red-crowned Crane and White-naped Crane in Cheorwon, Korea

철원지역에서 월동하는 두루미와 재두루미의 서식밀도모델

  • Received : 2014.11.09
  • Accepted : 2014.12.15
  • Published : 2014.12.31
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Abstract

This study was conducted to make distribution model of the Red-crowned Crane and the White-naped Crane according to the anthropogenic and natural factors affecting distribution of crane in Cheorwon, Korea. It was investigated that the impact power and its range of the indirect anthropogenic influence to feeding flock density in cranes from the road, residential area, military facilities, civilian control zone (CCZ), greenhouse and natural influence such as roosting site and available feeding area. Available feeding area is the most important factor for the crane's feeding site selection. The feeding flock density of the cranes near the residential area was lower than that of area far from the area, and tended to increase within 2.5 km distance. The increasing tendencies of feeding flock density from military facilities and high traffic volume road were similar, but the density in military facilities increased within 800 m, and the density from high traffic volume road increased within 2 km. These results suggested that residential area, military facilities and the road with high traffic volume had significant effect on foraging densities to the certain range. As the distance from the road with low traffic volume and roosting site increased, feeding flock density tended to decrease. The density of Red-crowned crane and White-naped crane inside the CCZ were respectively higher than those of outside the CCZ, especially for the Red-crowned crane. As a result, density of Red crowned cranes inside the CCZ was 5.2 times higher than that of outside, while that of white-naped cranes was 2.2 times bigger. If the density of greenhouse is lower than $40km^{-2}$, crane's feeding flock density in the low greenhouses density area was higher than that of high greenhouses density area. However, there was no difference in the feeding flock density if the density of the green houses is higher than $40km^{-2}$. The model for the Red-crowned Crane was related with available feeding area, distance from residential area, civilian control zone and distance from high traffic road. The model of the White-naped Crane was related with available feeding area, distance from roosting site and distance from lake. Finally, the estimated feeding flock density of cranes significantly correlated with density model according to the natural and anthropogenic factors.

본 연구에서는 두루미류의 개체군 및 서식밀도에 영향을 주는 요인 중 자연적 요인과 함께, 인간에 의한 직 간접적인 교란의 영향에 의한 서식분포모델을 도출하고자 하였다. 대상지역은 강원도 철원군의 민간인통제지역이며, 2009년부터 2014년까지 매년 1월의 두루미와 재두루미의 분포를 대상으로 하였다. 두루미류의 서식밀도는 거주지, 군사시설, 통행량이 빈번한 도로와 가까울수록 서식밀도가 감소하였고, 거리가 멀어질수록 서식밀도는 증가하였다. 통행량이 적은 도로, 잠자리와의 거리 및 비닐하우스의 밀도가 증가할수록 두루미류의 서식밀도는 감소하는 경향을 보였다. 또한, 두루미류의 서식밀도는 민간인통제지역 외부보다 내부의 밀도가 높게 나타났다. 전체 요인을 이용해 단계적 진입을 통한 회귀분석의 결과, 두루미는 $3.4{\times}$AV_FE (이용이 가능한 농경지의 면적 ha)+$1.27{\times}$N_RES (거주지와의 거리 km)-$0.54{\times}$CCZ_0 (민통선 내:0-외:1)+$0.4{\times}$N_HTR (통행량이 많은 도로와의 거리)-1.40이었다. 재두루미는 $9.0{\times}$AV_FE-$5.47{\times}$N_LTR (통행량이 낮은 도로와의 거리 km)+$0.49{\times}$N_Lake (저수지와의 거리 km)+1.02이었다. 두루미와 재두루미 모두 공통적으로 이용 가능한 농경지의 면적이 중요하였고, 두루미에서는 거주지와의 거리 및 통행량이 많은 도로와의 거리가, 재두루미에서는 통행량이 낮은 도로와의 거리가 중요한 요인으로 나타났다. 두 가지 종 모두에서 모델에 의한 추정값과 실제 분포를 이용한 밀도 사이에 유의미한 상관관계가 나타났다.

Keywords

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