Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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The macrobenthic community health was assessed using the Benthic Pollution Index(BPI) in Jinhae Bay, southern coast of Korea

저서오염지수를 이용한 진해만 해역의 저서건강도 평가

  • Jin-Young Seo (Ballast Water Research Center, KIOST) ;
  • Jin-Woo Choi (Research Institute of Oceanography, School of Earth & Environmental Sciences, Seoul National University)
  • 서진영 (한국해양과학기술원 선박평형수연구센터) ;
  • 최진우 (서울대학교 해양연구소)
  • Received : 2022.09.06
  • Accepted : 2022.12.14
  • Published : 2022.12.31
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Abstract

For the assessment of the benthic community health of Jinhae Bay using the Benthic Pollution Index, macrobenthic fauna samples were seasonally collected from 23 different sites between February, 2011 and November, 2012. The macrobenthic community health status was classified as "Poor" or "Very Poor" except for the bay mouth part of Jinhae Bay at the northern part of Geoje Island. A large proportion of functional Group IV and even azoic conditions appeared due to summer hypoxia at sites in sheltered regions of Jinhae Bay. Some of the dominant species recruited after summer hypoxia were Paraprionospio patiens, Sigambra bassi, and Theora fragilis belong to typical opportunistic species. By comparing the BPI values of the macrobenthic communities from other special management areas of Korea, Jinhae Bay was considered to have the lowest condition that was heavily polluted among special management areas.

2011년 2월부터 2012년 11월까지 진해만에 23개 정점을 선정하여 저서오염지수를 이용하여 대형저서동물의 군집건강도를 평가해 보았다. 그 결과, 거제도 북쪽과 칠천도 부근의 정점을 제외한 모든 진해만 해역에서 저서동물군집의 건강도가 4~5등급으로 매우 오염된 상태인 것으로 나타났다. 특히 마산만과 고성만, 통영만의 일부 정점들에서는 기회종이 속한 4그룹의 비중이 90% 이상으로 나타났는데, 이는 저서환경이 오염되어 있음을 시사한다. 진해만에서는 마산만, 행암만, 통영만, 고현만에서 여름철 hypoxia 현상으로 인해 무생물 상태를 보였고, 종료 후 기회종이 대량 가입하는 양상을 보였다. 하지만 hypoxia 후 기회종이 가입되지 않은 일부 정점들이 관찰되었고, 이로 인해 저서건강도가 과대평가되는 현상에 대한 추가 연구가 필요할 것으로 판단된다. 진해만의 저서건강도는 경기만의 시화호, 부산항만 등 다른 특별관리해역들에 비해서도 매우 낮게 나타나 심각하게 오염된 저서환경임을 시사하였다.

Keywords

Acknowledgement

본 연구는 한국연구재단 보호연구(NRF-2021R1I1A2057792)의 지원으로 수행되었습니다.

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