Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
권호 표지

Characteristics of Epilithic Diatom Communities and Physico-chemical Habitats in the Lake Imha Basin (Banbyeon Stream, Kilan Stream and Nakdong River)

임하댐 주변 유역(반변천, 길안천 및 낙동강 수역)에서 물리-화학적 서식처와 부착규조류 군집

  • Kim, Yong-Jae (Department of Life Science, Daejin University) ;
  • Won, Doo-Hee (Doohee Institute of Ecological Research, Korea Ecosystem Service Inc.)
  • 김용재 (대진대학교 생명과학과) ;
  • 원두희 ((주)생태연구단 두희연구소)
  • Received : 2011.07.12
  • Accepted : 2011.08.09
  • Published : 2011.08.31
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Abstract

In this study, We were investigated the interrelationships between epilithic diatom communities and physico-chemical factors at Banbyeon stream, Gilan stream and Nakdong river in the Lake Imha basin from September 2008 to June 2009. Epilithic diatom communities were identified a total 120 taxa which were composed to 2 Orders, 3 Suborders, 7 Families, 22 Genera, 108 species and 12 varieties. The dominant species were 4 taxa, which were Achnanthes alteragracillima, A. convergens, A. minutissima and Fragilaria construens var. venter during the investigation periods at 8 sites. Correlation coefficients between epilithic diatom communities and physicochemical factors were from -0.94 to 0.97. Correlation coefficients (r) between turbidity, QHEI and density, species number and indices of diatom communities were from -0.18 to 0.42 which was showed lower values than the values of chemical factors. Correlation coefficients (r) between QHEI and Epilithic diatom communities were showed the low values. Correlation coefficients (r) between TP and diatom indices (DAIpo, TDI) were 0.79 and 0.78, respectively. Therefore, epilithic diatom communities were greatly influenced by TP.

본 연구는 임하호 유역에 위치하는 반변천, 길안천과 낙동강에 총 8개 정점을 선정하여 2008년 9월부터 2009년 6월까지 물리-화학적 요인과 부착규조 군집과의 관계를 조사하였다. 부착 규조류는 총 120종류로서 2목, 3아목, 7과, 22속, 108종 및 12변종으로 구성되어 있다. 부착 규조 군집의 우점종은 Achnanthes alteragracillima, A. convergens, A. minutissima와 Fragilaria construens var. venter 등 4종류로 구성되어 있다. 부착 규조 군집과 물리-화학적 요인과의 관계(r)는 -0.94~0.97의 범위로 각요인에 대한 상관성의 범위가 넓었다. 물리적 요인인 탁도와 부착 규조 군집의 밀도, 종수 및 각 생물 지수 등과의 관계는 -0.25~0.18의 범위로서 화학적 요인보다 낮은 음 또는 양의 관계를 나타내었다. QHEI와 부착 규조 군집의 각 요인과의 관계는 -0.18~0.42의 범위로서 이 요인 역시 화학적 요인보다는 다소 낮은 음 또는 양의 상관성을 나타내었다. 물리적 서식지 (QHEI)와 부착 규조 군집과의 관계는 낮은 유의성을 나타내었다. TP와 DAIpo, TDI가 높은 상관성(r=0.79, 078)을 나타내므로 총인이 부착 규조군집에 영향을 미친 것으로 나타났다.

Keywords

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