Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Composition of Phytoplankton in Gamak Bay by CHEMTAX Analyses

CHEMTAX 활용한 가막만 식물플랑크톤 군집조성

  • Oh, Hyun-Taik (National Fisheries R&D Institute, Marine Environmental Management Division) ;
  • Kim, Da-Jung (National Fisheries R&D Institute, Marine Environmental Management Division) ;
  • Lee, Won-Chan (National Fisheries R&D Institute, Marine Environmental Management Division) ;
  • Jung, Rae-Hong (National Fisheries R&D Institute, Marine Environmental Management Division) ;
  • Hong, Suk-Jin (National Fisheries R&D Institute, Marine Environmental Management Division) ;
  • Kang, Yang-Sun (NFRDI, Marine Ecology Division) ;
  • Lee, Yang-Woo (Busan National Univ. Dept. Biology) ;
  • Tilburg, Charles (Univ. New England, Dept. Chemistry & Physics)
  • 오현택 (국립수산과학원 환경관리과) ;
  • 김다정 (국립수산과학원 환경관리과) ;
  • 이원찬 (국립수산과학원 환경관리과) ;
  • 정래홍 (국립수산과학원 환경관리과) ;
  • 홍석진 (국립수산과학원 환경관리과) ;
  • 강양순 (국립수산과학원 해양생태과) ;
  • 이용우 (부산대학교 생물학과) ;
  • Published : 2008.10.30
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Abstract

Chlorophyll a (chl a) has been used as an indicator for phytoplankton biomass in pelagic ecosystems due to the relative ease of measurement and selectivity for autotrophs in mixed plankton assemblages. However, the use of chi a as an indicator for phytoplankton biomass is restricted due to its inability to resolve taxonomic differences of phytoplankton and the highly variable relationship of chi a with phytoplankton. Here, we describe the analysis of High-Performance Liquid Chromatography (HPLC) photosynthetic pigment data using CHEMTAX, which is a matrix factorization program that uses chemical taxonomic indices (phytoplankton carotenoids) to quantify the abundance of phytoplankton groups. Compared to direct microscopic counting that can distinguish species within broad groups, the resolution of taxonomic groups by CHEMTAX is generally coarse. It can only distinguish between diatoms, dinoflagellates, cryptophytes, cyanobacteria, chlorophytes, prasinophytes, and haptophytes. However, CHEMTAX analysis is much faster and less expensive than microscopic counting methods. HPLC pigment observations were taken in the spring, summer, fall, and winter in$ 2005\sim2006$ within Gamak Bay, South Korea. CHEMTAX results revealed that diatoms were the dominant taxonomic group in Gamak Bay. In inner Gamak Bay, the ratio between diatoms and cryptophytes was $75\sim80%$, and the ratio between dinoflagellates and cryptophytes was $10\sim15%$. In outer Gamak Bay, the ratio between diatoms and cryptophytes was $85\sim90%$, and the ratio between dinflagellates and cryptophytes was only $1\sim5%$. The population structure was seasonal. Relative diatom populations were less in the summer than the winter season.

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References

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