생태와환경 (Korean Journal of Ecology and Environment)
- 제38권4호통권114호
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- Pages.445-453
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- 2005
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- 2288-1115(pISSN)
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- 2288-1123(eISSN)
담수성 식물플랑크톤의 크기별 동태에 대한 상향식, 하향식 조절간의 상대적 중요도 조사: II. 통계 모델링 분석을 이용한 조절인자 분석
Relative Importance of Bottom-up vs. Top-down Controls on Size-structured Phytoplankton Dynamics in a Freshwater Ecosystem: II. Investigation of Controlling Factors using Statistical Modeling Analysis
- 송은숙 (전북대학교 자연과학대학 화학과) ;
- 임장섭 (목포해양대학교 해양전자 통신공학부) ;
- 장남익 (국립환경연구원 영산강물환경연구소) ;
- 신용식 (목포해양대학교 해양시스템공학부)
- Song, Eun-Sook (Department of Chemistry, College of Natural Science, Chonbuk National University) ;
- Lim, Jang-Seob (Division of Information Communication Engineering, Mokpo National Maritime University) ;
- Chang, Nam-Ik (Youngsan-River Environment Research Laboratory, National Institute of Environmental Research) ;
- Sin, Yong-Sik (Division of Ocean System Engineering, Mokpo National Maritime University)
- 발행 : 2005.12.31
초록
전남 주암호에서의 식물플랑크톤 동태를 파악하기 위해 2003년 2월부터 10월까지 식물플랑크톤 생물량 (클로로필 a)의 크기별 시
Relative importance between bottom-up and top-down controls on phytoplankton dynamics was investigated in the Juam Reservoir, Chonnam based on the results from statistical analyses including regression and artificial neural network (ANN) modeling. Effects of nutrients on size-structured phytoplankton dynamics were explored by simple linear regression analysis and relative importance between bottom-up and top-down controls was estimated based on results from the artificial neural network analyses. Although there is a limitation in determining direct grazing effects since chlorophyll a : pheopigments ratios, indirect index for grazing activity rather than grazing rates or herbivores biomass were used, the results from regression analysis showed that nutrients especially orthophosphates were positively correlated with the phytoplankton biomass and chlorophyll a : pheopigments ratios were also positively correlated with the phytoplankton biomass at lower coefficient of determination (