Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Diversity of Benthic Macroinvertebrate Community in Sohan Stream in Ecological Landscape Conservation Area

생태·경관보전지역인 소한계곡의 저서성대형무척추동물 다양성 분석

  • Ham, Seong-nam (Nakdonggang National Institute of Biological Resources) ;
  • Kim, Sun-yu (Nakdonggang National Institute of Biological Resources) ;
  • Joo, Jaehyung (Nakdonggang National Institute of Biological Resources) ;
  • Jang, Seuk Gu (Samcheck Prasiola Japonica Research Center) ;
  • Kim, Dongsam (Samcheck Prasiola Japonica Research Center) ;
  • Bae, Mi-Jung (Nakdonggang National Institute of Biological Resources)
  • Received : 2021.12.14
  • Accepted : 2021.12.27
  • Published : 2021.12.31
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Abstract

In 2020, the diversity of benthic macroinvertebrate communities was investigated in the Sohan stream, an ecological and landscape conservation area, and the results were compared with the previous research conducted in 2011. In total, 42 species (two phyla, three classes, and seven orders) were found in the Sohan stream. Species richness and abundance sharply decreased at all sampling sites because of Typhoons Haishen and Maysak in 2020, which had a direct impact on the stream. In the functional feeding group, the ratio of collector-gatherers was the highest at all sampling sites. However, during the autumn season, the shredder ratio increased from 13.4% to 42.4% in the uppermost stream site. Compared with the diversity of benthic macroinvertebrates surveyed in 2011, a total of 53 species (two phyla, three classes, and eight orders) were found. The percentage of species richness and abundance of Ephemeroptera, Plecoptera, and Trichoptera was more than 50% both in 2011 and 2020. Only the richness of Ephemeroptera was significantly different between them (2011: 2.9 and 2020: 6.7). In this study, the abrupt changes of species richness and abundance in benthic macroinvertebrate were not observed before and after the designation of an ecological and landscape conservation area. However, it is necessary to monitor benthic macroinvertebrates in order to confirm that biodiversity is continuously maintained long after the designation of the ecological and landscape conservation area.

본 연구에서는 국내 유일의 민물김 서식지이며 생태·경관보전지역인 소한계곡의 저서성대형무척추동물 다양성을 분석하였다. 저서성대형무척추동물의 조사는 소한계곡의 발원지를 포함하여 총 3개 지점에서 계절 조사를 수행하였으며, 2011년에 수행된 과거 조사 자료와 비교하였다. 본 연구의 조사 결과, 총 2문 3강 7목 25과 42종의 출현이 확인되었으며, 개체수 및 종수는 2020년 삼척시에 직접적인 영향을 끼친 태풍 하이선, 마이삭의 영향으로 모든 조사지점에서 급격하게 감소하였다. 섭식기능군 분석 결과 주워먹는 무리의 비율이 전 조사지점에서 가장 높았으나, 가을철 최상류 구간에서 썰어먹는 무리의 비율이 13.4~42.4%로 증가하였다. 기존에 수행된 2011년 조사와 비교시 총 2문 3강 8목 22과 53종의 출현이 확인되어 본 연구보다 11종이 많이 출현하였다. 하루살이목, 강도래목, 날도래목의 종 및 개체수 비율이 조사연도와 관계없이 50% 이상을 차지하였으며, 하루살이목의 종수만 2.9종에서 6.7종으로 유의하게 증가하였다. 본 연구에서는 기존에 수행된 2011년과 비교하였을 때 저서성대형무척추동물의 다양성에 큰 변화는 확인되지 않았으나, 강수량 변화 등과 같은 기후영향에 따른 저서성대형무척추동물의 급감, 종조성 변화가 확인된 바 지속적인 모니터링을 통해 생태·경관보전지역인 소한계곡의 보전·관리 방안 마련을 위한 기초자료 확보가 필요한 것으로 판단된다.

Keywords

Acknowledgement

본 논문은 환경부의 재원으로 국립낙동강생물자원관(NNIBR202101107) 및 삼척시청 연구과제 생태·경관보존지역 소한계곡 담수생물 다양성조사의 지원을 받아 수행하였습니다.

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