Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Phytoplankton Flora and Community Structure in the Lower Nakdong River

낙동강하류의 식물플랑크톤상과 군집구조

  • Choi, Chul-Mann (Division of Environment and Ecology, National Institute of Agricultural Science & Technology, Rural Development Administration) ;
  • Kim, Won-Il (Division of Environment and Ecology, National Institute of Agricultural Science & Technology, Rural Development Administration) ;
  • Lee, Jong-Sik (Division of Environment and Ecology, National Institute of Agricultural Science & Technology, Rural Development Administration) ;
  • Jung, Goo-Bok (Division of Environment and Ecology, National Institute of Agricultural Science & Technology, Rural Development Administration) ;
  • Lee, Jeong-Taek (Division of Environment and Ecology, National Institute of Agricultural Science & Technology, Rural Development Administration) ;
  • Moon, Sung-Gi (Department of Biology, Kyungsung University) ;
  • Kim, Jin-Ho (Division of Environment and Ecology, National Institute of Agricultural Science & Technology, Rural Development Administration)
  • 최철만 (농촌진흥청 농업과학기술원 환경생태과) ;
  • 김원일 (농촌진흥청 농업과학기술원 환경생태과) ;
  • 이종식 (농촌진흥청 농업과학기술원 환경생태과) ;
  • 정구복 (농촌진흥청 농업과학기술원 환경생태과) ;
  • 이정택 (농촌진흥청 농업과학기술원 환경생태과) ;
  • 문성기 (경성대학교 이과대학 생물학과) ;
  • 김진호 (농촌진흥청 농업과학기술원 환경생태과)
  • Published : 2007.06.30
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Abstract

This study was focused on the investigation of the phytoplankton flora and community structure for changing of water environment at the rivers in the lower part of Nakdong river, The samples for this study were collected every month from Jan. 2004 To Dec. 2004. the 196 species belonged to 94 genera were identified during this study periods. The number of species was recorded the maximum 124 taxa in summer and the minimum 69 taxa in winter, We observed the maximum taxa (92 taxa) at the site No. 20 and the minimum taxa (55 taxa) at the site No. 8, respectively. Among the phytoplankton communities, diatoms were dominated over 40% of total phytoplankton groups. Subdominant groups were green algae (over 20% of total phytplankton groups). During this study periods, the 60 species were investigated ecologically significant species (46 cosmopolitic species, 25 pollution indicator, 21 redtide causative species, 8 dominant species, and 7 frequently occurred species). According to the cluster analysis by similarity index, the study sites could be divided into 4 groups.

본 연구는 낙동강 하류 20개 지점에 대하여 주위 환경 변화에 대응하기 위하여 식물플랑크톤상과 군집구조에 대한 조사를 실시하였다. 식물플랑크톤상과 군집은 2004년 1월부터 12월까지 매월 1회 조사하였다. 조사기간 동안 식물플랑크톤은 총 94속 196 분류군이 동정되었는데, 여름에 124분류군으로 가장 많은 종이 출현한 반면 겨울에 69분류군으로 가장 적은 종이 출현하였다. 지점별 총 출현종수는 낙동강 하구인 지점 20에서 92분류군으로 가장 많았고 지점 8에서 55분류군으로 가장 적게 출현하였다. 분류군별 출현비율은 모든 계절에서 규조류(diatoms)가 40% 이상으로 가장 높았고 녹조류(green algae)가 20%, 다음으로 남조류(blue-green algae) 등의 순으로 조사되었다. 조사기간 동안 생태적 주요종은 60 분류군이 조사되었는데, 그 중 광분포종은 46분류군, 오염지표 종 25분류군, 적조원인종 21분류군, 우점종 8분류군, 출현빈번종 7분류군이었다. 지점간 유사도지수에 의한 군집분석의 결과, 20개 지점은 4개의 그룹으로 분류되어졌다.

Keywords

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