The Relationship between Phytoplankton Productivity and Water Quality Changes in Downstream of Nakdong River

낙동강 하류에서 식물플랑크톤 생산력과 수질 변화와의 관계

  • 박홍기 (부산광역시 상수도사업본부 수질검사소) ;
  • 정종문 (부산광역시 상수도사업본부 수질검사소) ;
  • 박재림 (신라대학교 환경학과) ;
  • 홍용기 (부경대학교 생물공학과)
  • Published : 1999.02.01

Abstract

The relationship between primary productivity and changes in water quality was investigated at Mulgum station, a site downstream of the Nakdong River, Korea. Phytoplankton production was characterized by blooms of Microcystis aeruginosa during the summer and Stephanodiscus hantzschii during the winter. Primary production and secondary production by bacterioplankton ranged from 1.5~53.5 mg-C/ι day and 0.1~0.3 mg-C/ι day, respectively. Distribution of total organic carbon appeared to be highly correlated with phytoplankton biomass, especially during blooms of M. aeruginosa, when particulate organic carbon was 81% of total organic carbon and the main source of organic materials supplied into the water. The correlation coefficient between chlorophyll-a and BOD was 0.86. Thus it was concluded that autochthonous phytoplankton mostly affected the BOD level. Total bacterial numbers were also highly correlated with chlorophyll-a ($r^2$= 0.84) and the bacterial community appears to be regulated by phytoplankton biomass in this area.

Keywords

phytoplankton;bloom;BOD;Nakdong River;TOC;total bacterial number

References

  1. Can. J. Fish. Aquat. Sci. v.41 Empirical relationship between bacteria abundance and chlorophyll concentration in fresh and marine water Bird, D.F.;J, Kalff
  2. Appl. Environ. Microbiol. v.45 Estimating bacterioplankton production by the[³H]thymidine incorporation in a eutrophic Swedish Lake Bell, R.T.;G.M. Ahlgren;I. Ahlgren
  3. Limnological Analysis(2nd ed.) Wetzel, R.G.;G.E. Likens
  4. Aquatic Microbiology Rheinheimer, G.
  5. Standard Methods for the Examination of Water and Wastewater APHA
  6. Mar. Ecol. Prog. Ser. v.10 The ecological role of water-column microbes in the sea Azam, F.;T. Frenchel;J.G. Field;J.S. Gray;L.A. Meyer-Reil;F. Thingstad
  7. A Manual of Chemical and Biological Methods for Seawater Analysis Parsons, T.R.;Y. Maita;C.M. Lalli
  8. 한국수질보전학회지 v.12 낙동강에서 chlorophyll-a와 BOD의 상관관계 신성교;이수웅;박청길
  9. Mar. Bio. v.66 Thymidine incorporation as a measure of heterotrophic bacterio-plankton production in marine surface waters : evaluation and field results Fuhrman, J.A.;F. Azam
  10. The institute of biology's studies in biology v.52 Phytoplankton Boney, A.D.
  11. Appl. Environ. Microbiol. v.54 Primary and bacterial secondary production in a south-western reservoir Chrzanowski, T.H.;J.G. Hubbard
  12. 한국동식물 도감 정영호
  13. 과학기술처 보고서 호수 만입부에서의 조류 대량 증식 제어기술 개발 박원훈
  14. J. Cons. Perm. Int. Explor. Mer. v.18 The use of radioactive carbon$^{14}C$ for measuring organic production in the sea Steemann Nielsen, E.