Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Occurrence of Earthworm in Agro-ecosystem

농생태계 서식하는 지렁이 종 분포조사

  • Hong, Yong (Institute of Agricultural Science, Sangju National University) ;
  • Kim, Tae-Heung (Faculty of Biological Resources Science, College of Agriculture, Chonbuk National University)
  • 홍용 (상주대학교 농업과학연구소) ;
  • 김태흥 (전북대학교 생물자원과학부)
  • Published : 2007.06.01
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Abstract

The abundance of earthworm in the agro-ecosystem was assessed on the basis of 1,846 individuals collected from May to October 2006. Material was found from litter layers in soils by hand sorting and digging. They encompassed 3 families, 5 genera, and 15 species. Species composition and abundance were as follows: Amynthas agrestis 20.9%, Amynthas koreanus 20.3%, Amynthas heteropodus 15.4%, Amynthas sp. 8.7%, Drawida japonica 8.0%, Eisenia fetida 7.2%, Amynthas hilgendorfi 7.0%, Bimastos parvus 3.2%, Amynthas hupeiensis 2.5%, Aporrectodea caliginosa 1.8%, Amynthas corticis 1.8%, Aporrectodea tuberculata 1.3%, Eisenia andrei 1.2%, Amynthas sp. 20.4%, and Amynthas sp. 10.3%. Of 1,046 individuals, the A. agrestis, A. koreanus, and A. heteropodus were the most numerous members with abundance of 56.7%. Disc-shaped male pore region is useful for classification of Amynthas, and in the survey, we collected two new species with male discs from lettuce cultivated region, Amynthas sp. 1 Amynthas sp. 2. The clitellate vs. aclitellate ratio of the earthworm was approximately 1.25:1.0.

2006년 5월부터 10월까지 국내 농생태계 49지점에서 탐색 수집된 지렁이는 3과 5속 15종 1,846 개체이며 종 구성은 다음과 같다. Amynthas agrestis 20.9%, Amynthas koreanus 20.3%, Amynthas heteropodus 15.4%, Amynthas sp. 8.7%, Drawida japonica 8.0%, Eisenia fetida 7.2%, Amynthas hilgendorfi 7.0%, Bimastos parvus 3.2%, Amynthas hupeiensis 2.5%, Aporrectodea caliginosa 1.8%, Amynthas corticis 1.8%, Aporrectodea tuberculata 1.3%, Eisenia andrei 1.2%, Amynthas sp.20.4%, Amynthas sp. 1 0.3%이다. 종 조성 비율을 보면 이와 같이 왕지렁이속, A. agrestis, A. koreanus, A. heteropodus 3종이 차지하는 개체수는 1,046개체로 전체의 약 56.7%를 차지하는 우리나라 농생태계의 우점종 이다. 성숙 개체와 미성숙 개체의 비율은 1.25:1로 성숙된 개체가 더 많이 출현하였다. Amynthas sp. 1, Amynthas sp. 2는 본 조사를 통하여 처음으로 확인되는 신종 후보로, 여러 외부형질, 특히 malepore의 형태가 지금가지 국내에서 기록된 다른 왕지렁이속에 속하는 종들과는 확연히 구별되는 특징을 갖고 있다.

Keywords

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