생태와환경 (Korean Journal of Ecology and Environment)

한국수생태학회 (The Korean Society of Limnology)
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대청호에서 식물플랑크톤 크기에 따른 엽록소 농도의 계절적 변화

Seasonal Fluctuation of Chlorophyll a Concentration in the Size Fractionation of Phytoplankton in Daechung Reservoir

  • 문종전 (배제대학교 생명과학부) ;
  • 이상욱 (배제대학교 생명과학부) ;
  • 황순진 (건국대학교 지역생태시스템공학과) ;
  • 오인혜 (배제대학교 생명과학부)
  • 발행 : 2001.12.31
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초록

여러 지역의 호소환경에서 picoplankton이 중요한 일차 생산자로 보고되고 있는데 대청호에서 이를 조사하기 위하여 1998년 9월부터 1999년 9월까지 식물플랑크톤 크기에 따른 엽록소 농도의 계절적 변화를 조사하였다. $200\;{\mu}m$이하의 식물플랑크톤은 대전취수탑에서 $0.7{\sim}36.9\;{\mu}g/l$, 만입부에서 $0.5{\sim}23.5\;{\mu}g/l$회남대교에서 $1.9{\sim}20.1\;{\mu}g/l$ 대청댐에서 $0.5{\sim}17.4\;{\mu}g/l$이었는데, 조사지점 4곳에서 모두 9월에 최대치를 나타내었으며 그 이후는 서서히 감소되어 $4{\sim}6$월에 최소값을 보이는 경향을 나타내었다. 계절에 따른 엽록소 농도의 크기별 조성비율을 보면, 연중 microplankton과 nanoplankton 조성비율은 큰 변이를 보였는데, 회남 대교를 제외한 조사지역 3곳에서 $6{\sim}10$월에는 microplankton의 비율이 높았으나 3월에는 조성비율이 매우 낮은 경향을 보였다. 그러나 조사지역 4곳 모두에서 picoplankton은 연중 $2.0{\sim}24.3%$로 거의 일정하였다.

Since a substantial part of the total planktonic primary production is due to the activity of the picoplankton, seasonal change of chlorophyll a in the picoplankton, nanoplankton and microplankton was determined at four locations in Daechung Reservoir from September in 1998 to September in 1999. Chlorophyll a concentration (<$200\;{\mu}m$) was $0.7{\sim}36.9\;{\mu}g/l$ In TAE (Taejeon site), $0.5{\sim}23.5\;{\mu}g/l$ in MAN (Man site), $1.9{\sim}20.1\;{\mu}g/l$ in HOE (Hoenam site), and $0.5{\sim}17.4\;{\mu}g/l$ in DAM (Dam site). Generally it was observed the highest concentration of chlorophyll a was in September and the lowest in April to June. The relative contribution of chlorophyll a of each fraction was changed dramatically through the year. Relative contribution of chlorophyll a of microplankton was high from June to October, and low in March in all locations except HOE. However chlorophlyll a concentration of picoplankton fraction was $2.0{\sim}24.3%$ of total chlorophyll a (<$200\;{\mu}m$) through the year and did not show any dramatic changes at all locations.

키워드

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