Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Community Analysis based on Functional Feeding Groups of Aquatic Insects in Wonju Stream

원주천 수서곤충의 섭식기능군을 이용한 군집분석

  • Published : 2006.06.01
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Abstract

Community analysis based on functional feeding groups of aquatic insects in Wonju stream was assessed with the composition of aquatic insects collected for four times at the area from May to November, 2004. The total 92 species of aquatic insects in 62 genera, 37 families, and 8 orders were collected during the period of the investigation. The distribution of the numbers and movements of aquatic insects proved the Woniu stream to be healthy except for St. 7 and St. 9. In the main streams, the occupancy ratio of shredders and scrapers of the functional feeding groups(FFGs) gradually decreased from St. 1 to St. 9 while collectors-gathering and collectors-filtering remarkably increased. In St. 2, the shredders and scrapers posted a higher ratio compared to those in tributaries, and it had the quality of mountain streams. With the results of analysis on the similarity matrix(UPGMA) between each sites of Wonju stream, St. 1, 2, St. 3-8 and St. 9 were classified as the upper stream, the middle stream, and the lower stream area, respectively.

2004년 5월 29일부터 2004년 11월 6일까지 4회에 걸쳐 원주천의 섭식기능군을 이용해 군집분석을 하였다. 조사기간동안 출현한 수서곤충은 총 8목 37과 62속 92종이었으며, 원주천의 현존량과 동태는 지점 7, 9를 제외하고 양호하였다. 원주천의 섭식기능군(FFG)을 알아본 결과 본류는지점 1에서 9로 갈수록 써는무리(shredders)와 긁어먹는무리(scrapers)가 점차적으로 점유율이 낮아지고 주워먹는무리(collectors-gathering)와 걸러먹는무리(collectors-flitering)가 현저하게 증가하였다. 지점 2는 다른 지류지점에 비해 긁어먹는무리와 써는무리가 다소 높은 비율을 나타내어 산간계류의 특성을 가지고 있었다. 원주천의 각 지점별 유사도분석(UPGMA)을 한 결과 최상류수역을 보이는 지점 1, 2와 중류역의 특성을 보이는 지점 3, 4, 5, 6, 7, 8 그리고 최하류역으로 보이는 지점 9 등, 3개의 그룹으로 나뉘었다.

Keywords

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