Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Analysis of Fish Community of Lagoons in the East Seashore According to Hydrach Succession

습성천이에 따른 동해안 석호의 어류군집 분석

  • Park, Seungchul (Department of Biological Science, Inha University) ;
  • Jang, Youngsu (Department of Environmental Science, Konkuk University) ;
  • Lee, Kwangyeol (Department of Biological Science, Kangwon National University) ;
  • Heo, Woomyung (Department of Environmental Engineering, Kangwon National University) ;
  • Cho, Kanghyun (Department of Biological Science, Inha University) ;
  • Choi, Jaeseok (Institute of Environmental Research, Kangwon National University)
  • Received : 2013.05.31
  • Accepted : 2013.10.31
  • Published : 2014.02.28
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Abstract

Fish community of eight lagoons in the east seashore, Korea were investigated from 2007 to 2008. Total 66 species caught during the period were belonged to 34 families, and total biomass was 2,024.8 kg. Also, similarity analysis results of each lagoon were divided three major groups. On the other hand, result of a comparison of the composition ratio of freshwater fish, brackish water fish, and seawater fish which is divided into separate each age data of previous studies has emerged in this study, since the 1990's, freshwater fish is reduced, seawater fish and increase, some changes in the fish community had changed dynamically in the lagoon. These changes considered that against the natural hydrach succession will change to freshwater lake from brackish water lake. Therefore, we considered to ecological characteristics of lagoon and process of hydrach succession when conservation, management, and restoration of the lagoons.

2007년부터 2008년까지 동해안에 분포하는 8개 석호에 대한 어류군집에 대하여 조사한 결과는 다음과 같다. 조사기간 동안 확인된 어류는 총 34과 66종 126,224개체였으며 생체량은 2,024.8 kg이었다. 각 석호의 출현종과 개체수를 대상으로 군집분류를 실시한 결과 보존이 양호한 그룹, 담수의 영향을 받는 그룹, 그리고 해수의 영향을 받는 그룹 등 3그룹으로 나누어졌다. 한편 선행연구자료를 각 연대별로 나누고 본 조사에서 출현한 담수어, 기수어, 그리고 해수어의 종구성비를 비교한 결과, 1990년대 이후부터 담수어가 감소하고 해수어가 증가하는 등 일부 석호에서 어류군집의 변화가 역동적으로 변화하고 있었다. 이러한 변화는 기수호에서 담수호로 변화해가는 자연적인 습성천이에 대한 역천이로 볼 수 있으며 향후 석호의 보존 및 관리, 그리고 복원을 실시할 때에는 석호 본연의 생태적 특성과 습성천이 과정에 대하여 충분히 검토 및 고려되어야 할 것으로 사료된다.

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