Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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Community Structure and Health Assessment of Macrobenthic Assemblages at Spring and Summer in Garorim Bay, West Coast of Korea

가로림만에 서식하는 대형저서동물의 춘계와 하계의 군집구조 및 건강도 평가

  • Jung, Rae-Hong (Marine Environment Research Division, National Fisheries Research and Development Institute) ;
  • Seo, In-Soo (Korea Benthos Research Center, Co. Ltd.) ;
  • Lee, Won-Chan (Marine Environment Research Division, National Fisheries Research and Development Institute) ;
  • Kim, Hyung-Chul (Marine Environment Research Division, National Fisheries Research and Development Institute) ;
  • Kim, Jeong-Bae (Marine Environment Research Division, National Fisheries Research and Development Institute) ;
  • Choi, Byoung-Mi (Korea Benthos Research Center, Co. Ltd.) ;
  • Yun, Jae-Seong (Korea Benthos Research Center, Co. Ltd.) ;
  • Na, Jong-Hun (Korea Benthos Research Center, Co. Ltd.)
  • 정래홍 (국립수산과학원 어장환경과) ;
  • 서인수 ((주)저서생물연구센터) ;
  • 이원찬 (국립수산과학원 어장환경과) ;
  • 김형철 (국립수산과학원 어장환경과) ;
  • 김정배 (국립수산과학원 어장환경과) ;
  • 최병미 ((주)저서생물연구센터) ;
  • 윤재성 ((주)저서생물연구센터) ;
  • 나종헌 ((주)저서생물연구센터)
  • Received : 2014.08.28
  • Accepted : 2014.10.28
  • Published : 2014.10.31
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Abstract

This study was performed to investigate the community structure and health assessment of macrobenthic assemblages in Garorim Bay, West Coast of Korea. Macrobenthos were collected by van Veen grab sampler at May(spring) and July(summer) 2012. A total of 247 species occurred and mean density was $1,625\;ind.\;m^{-2}$, both of which were dominated by annelid polychaetes(120 species and $1,241m^{-2}$). Dominant species were the polychaetes Ampharete arctica, Lumbrineris longifolia, Mediomastus californiensis and Euclymene oerstedi, with a density of 445(${\pm}1,837\;ind.\;m^{-2}$), 103(${\pm}148\;ind.\;m^{-2}$), 55(${\pm}83\;ind.\;m^{-2}$) and 50(${\pm}104\;ind.\;m^{-2}$), respectively. The study area was divided into 3 station group based on the cluster analysis and nMDS ordination. These assemblage were : 1)the group 1 and 2 were associated with coarse sediment dominated stations and 2)the group 3 was connected with a mixed and fine sediment dominated stations group. The BPI and AMBI index were applied to assess the benthic ecological status. The ecological status of the Garorim Bay was "good status(slightly polluted)" to "high status(normal)" at most sampling stations during spring and summer. In conclusion, the two marine biotic index calculated shown that the Garorim Bay had a good ecological status.

본 연구는 가로림만에 서식하는 대형저서동물의 군집구조와 건강도를 평가하는데 목적이 있다. 대형저서동물의 채집을 위한 현장조사는 2012년 5월(이하 춘계)와 7월(이하 하계)에 실시하였다. 가로림만에서는 총 247종 $4.4m^{-2}$과 35,745개체(1,625개체 $m^{-2}$)의 대형저서동물이 출현하였고, 다모류가 120종과 27,310개체(1,241개체 $m^{-2}$)의 밀도를 나타내 가장 우점하는 생물이었다. 가로림만의 주요 우점종은 다모류의 작은사슴갯지렁이(Ampharete arctica), 긴자락송곳갯지렁이(Lumbrineris longifolia), Mediomastus californiensis 및 Euclymene oerstedi등이었다. 출현 종과 개체수의 자료를 근거로 대형저서동물의 군집구조를 파악한 결과, 대형저서동물 군집은 크게 3개로 구별되었고, 조립질 퇴적물(그룹 1과 2)과 혼합 및 세립질 퇴적물(그룹 3)이 우세한 정점군으로 나뉘었다. 가로림만의 건강도를 평가한 결과, BPI지수는 춘계와 하계에 공통적으로 가장 양호한 상태(high status; normal)를 나타낸 반면, AMBI지수는 양호한 상태(good status; slightly polluted)를 반영하고 있었다. 따라서 가로림만의 건강도는 양호한 상태를 나타내는 것으로 판단할 수 있었다.

Keywords

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