The Korean Journal of Ecology

The Ecological Society of Korea (한국생태학회)
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Comparison Habitat Preference for Small Mammals around the Hyeongsan River

형산강 수계 주변 소형 포유류의 서식지 선호도 비교

  • 정철운 (동국대학교 생명과학과) ;
  • 이정일 (동국대학교 생명과학과)
  • Published : 2004.06.01
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Abstract

This study was conducted to clarify the preference and habitat condition of small mammals at the Hyeongsan river in Ulsan, Gyeongju, and Pohang from January 2003 to July 2003. In the study sites, total 111 individuals of Apodemus agrarius, Rattus norvegicus, and Micromys minutus were captured in study sites. The most abundant species were Apodemus agrarius, 79.2 percent, among the captured small mammals. Density of habitation was significantly higher in agricultural land than in either private house or woods. However, they were more abundant in paddy Weld area than in agricultural land. A number of captured small mammals were higher in herbaceous rather than three other vegetation types. Existent of river embankment and its type were important factors affecting the spatial distribution of the individuals. Preference of small mammals were significantly lower in revetment block area rather than in none or nature-stone mat area. There was significantly correlationship between the depth of water and the number of captured small mammals. A number of captured small mammals were clearly increased in reference to decreasing depth of water in study site, in conclusion, the following factors such as the vegetation structure, depth of water, types of land use and types of river dike could be affected the spatial distribution of small mammals in the study sites.

형산강 수계 주변을 대상으로 하여 소형 포유류의 서식현황 및 서식지 선호도를 측정하기 위하여 2003년 1월부터 7월에 걸쳐 조사하였다. 서식이 확인된 소형 포유류는 등줄쥐(Apodemus agrarius), 시궁쥐(Rattus norvegicus), 멧밭쥐(Micromys minutus) 등 3종이었다. 주요 우점종으로는 88개체로 79.20%를 보인 등줄쥐였으며, 다음으로 시궁쥐와 멧밭쥐의 순을 보였다. 소형 포유류의 서식지 선호도는 수계 주변의 토지이용 유형과 경작지, 식생유형, 그리고 제방의 설치 유무와 수심 등 여러 가지 서식지 구조에 따라 다양하게 나타났는데 민가와 삼림에 비하여 경작지에서 특히 논에서의 선호도가 높았으며, 식생 구조별로는 초지의 선호도가 높게 나타났다. 하천제방의 유무도 소형 포유류의 서식에 영향을 미쳤는데 제방이 조성되지 않은 지역이나 자연석 매트 공법으로 이루어진 지역의 경우 소형 포유류의 서식에 부정적인 영향을 미치지 않는 것으로 조사되었으나, 콘크리트 호안제방의 경우 이들의 공간적 분포에 상당한 영향을 미치는 것으로 나타났다. 수계 가장자리의 수심 또한 소형 포유류의 서식에 영향을 미쳤는데 수심이 말아질수록 소형 포유류의 서식밀도는 높게 나타났다.

Keywords

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