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Hydrobiologia

, Volume 369, Issue 0, pp 217–227 | Cite as

The phytoplankton succession in the lower part of hypertrophic Nakdong River (Mulgum), South Korea

  • Kyong Ha
  • Hyun-Woo Kim
  • Gea-Jae Joo
Article

Abstract

Investigations were carried out to determine the mechanism of phytoplankton succession in the lower part of Nakdong River. Intensive monitoring was conducted from April 1993 to April 1995 at weekly or biweekly intervals. This river is the main source of drinking water for more than 8 million residents living in Pusan and the Southeastern region of Korea, and it is also important for industrial purposes. Due to the rapid urbanization and industrialization, this river has become hypertrophic and it is heavily regulated (mean chl. a, 79±232 µg l-1 n = 76; mean TN, 4.3±2.0 mg l-1 n=30; mean TP, 165 ± 108 µg l-1 n = 45). Bacillariophyceae were dominant year-round in 1993, with spring and late fall peaks. Dominant communities in 1994 were Bacillariophyceae in March and April, Chlorophyceae and Cryptophyceae in May, Cyanobacteria in July and August, Chlorophyceae and Cryptophyceae in October, and Bacillariophyceae in December. As drought persisted through the summer of 1994, elevated water temperature (over 30 °C) possibly triggered Cyanobacteria bloom (mainly Microcystis aeruginosa, maximum cell density, 1.6 × 107 cells ml-1). The most common diatom, Stephanodiscus hantzschii, repeatedly dominated from late fall to next spring (mean and maximum cell density, 7.5 × 104, 1.2 × 105 cells ml-1, respectively). This small centric diatom was favored by the low discharge and the cold water (water temperature, 3–10 °C). After the diatom bloom, this community shifted to peaks of colonial Chlorophyceae and motile Cryptophyceae, owing to the high rate of zooplankton grazing activity and increased water temperature. Overall, the phytoplankton periodicity was primarily governed by the hydrologic regime (discharge). Changes in silica concentration, water temperature and high zooplankton density might have played an important role in phytoplankton dynamics during the non-flooding periods. Compared to other large rivers, strong Microcystis bloom events in summer and Stephanodiscus bloom events in winter were noticeable in the dry year. The patterns of phytoplankton succession observed in this study may have a significance since most of the large rivers in Far Eastern Asian countries are subjected to eutrophication and regulation of discharge.

regulated river Microcystis bloom discharge temperature community composition 

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References

  1. Descy, J. P., P. Servais, J. S. Smitz, G. Billen & E. Everbecq, 1987. Phytoplankton biomass and production in the River Meuse (Belgium). Arch. Hydrobiol. Algol. Stud. 78: 225–245.Google Scholar
  2. Descy, J. P., 1993. Ecology of the phytoplankton of the River Moselle: effects of disturbances on community structure and diversity. Hydrobiologia 249: 111–116.CrossRefGoogle Scholar
  3. Garnier, J., G. Billen & M. Coste, 1995. Seasonal succession of diatoms and Chlorophyceae in the drainage network of the Seine River: Observations and modeling. Limnol. Oceanogr. 40: 750– 765.CrossRefGoogle Scholar
  4. Gosselain, V., J. P. Descy & E. Everbecq, 1994. The phytoplankton community of the River Meuse, Belgium: seasonal dynamics (year 1992) and the possible incidence of zooplankton grazing. Hydrobiologia 289: 179–191.CrossRefGoogle Scholar
  5. Ha, K., 1996. The mechanism of phytoplankton succession in the lower part of Nakdong River. M.S. Thesis. Pusan National University, Pusan, 86 pp.Google Scholar
  6. Harris, G. P., 1986. Phytoplankton Ecology. Chapman and Hall, New York, 327 pp.Google Scholar
  7. Jones, G. J. (ed), 1994. Cyanobacterial Research in Australia. CSIRO, Canberra, 193 pp.Google Scholar
  8. Joo, G. J., 1990. Limnological studies of oxbow lakes in the Southeastern United States: Morphometry, physicochemical characteristics and patterns of primary productivity. The University of Alabama, Tuscaloosa, PhD. dissertation, 122 pp.Google Scholar
  9. Joo, G. J., 1995. Ecological Studies on the Nakdong River (1957– 1994). Kumjung Press, Pusan, 178 pp (in Korean).Google Scholar
  10. Kim, H. W., 1996. Characteristics of physicochemical parameters and zooplankton dynamics in the Nakdong River. M.S. Thesis. Pusan National University, Pusan, 87 pp.Google Scholar
  11. King, D. L., 1970. The role of carbon in eutrophication. J. Wat. Pollut. Cont. Fed. 42: 2035–2051.Google Scholar
  12. Kiss, K. T., 1987. Phytoplankton studies in the Szigetkoz section of the Danube during 1981–1982. Arch. Hydrobiol. Suppl. 78: 247–273.Google Scholar
  13. Lampert, W., Fleckner, W., Rai, H. & B. E. Taylor, 1986. Phytoplankton control by grazing zooplankton: A study on the spring clearwater phase. Limnol. Oceanogr. 31: 478–490.Google Scholar
  14. McQueen, D. J. & D. R. S. Lean, 1987. Influence of water temperature and nitrogen to phosphorus ratio on the dominance of bluegreen algae in Lake St. George, Ontario. Can. J. Fish. aquat. Sci. 44: 598–604.Google Scholar
  15. Moed, J. R., H. L. Hoogveld & W. Apeldoorn, 1976. Dominant diatoms in Tjeukemeer (The Netherlands): II. Silicon depletion. Freshwat. Biol. 6: 355–362.CrossRefGoogle Scholar
  16. OECD., 1982. Eutrophication of waters: Monitoring, assessment and control. Paris, 154 pp.Google Scholar
  17. Paerl, H. W. & J. F. Ustach, 1982. Bluegreen algal scums: An explanation for their occurrence during freshwater blooms. Limnol. Oceanogr. 27: 212–217.Google Scholar
  18. Paerl, H. W., 1987, Dynamics of Bluegreen algal (Microcystis aeruginosa) blooms in the lower Neuse River, North Carolina: Causative factors and potential controls. Water Resources Research Institute of the University of North Carolina., 164 pp. UNC-WRRI-87-229.Google Scholar
  19. Reynolds, C. S., 1984a. The ecology of freshwater phytoplankton. Cambridge Univ. Press, Cambridge and New York, 384 pp.Google Scholar
  20. Reynolds, C. S., 1984b. Phytoplankton periodicity: the interactions of form, function and environmental variability. Freshwat. Biol. 14: 111–142.CrossRefGoogle Scholar
  21. Reynolds, C. S., 1988. The concept of ecological succession applied to seasonal periodicity of freshwater phytoplankton. Verh. int. Ver. Limnol. 23: 683–691.Google Scholar
  22. Reynolds, C. S., J. Padisák & U. Sommer, 1993. Intermediate disturbance in the ecology of phytoplankton and the maintenance of species diversity: A synthesis. Hydrobiologia 249: 183–188.CrossRefGoogle Scholar
  23. Reynolds, C. S. & J. P. Descy, 1996. The production, biomass and structure ofj phytoplankton in large rivers. Arch. Hydrobiol. Suppl. 113, Large rivers 10 1–4: 161–187.Google Scholar
  24. Sell, D. W., H. J. Carney & G. L. Fahnenstiel, 1984. Inferring competition between natural phytoplankton populations: The Lake Michigan example reexamined. Ecology 65: 325–328.CrossRefGoogle Scholar
  25. Shannon, C. E. & W. Weaver, 1949. The Mathematical Theory of Communication. Urbana, Univ. Illinois Press, 117 pp.Google Scholar
  26. Shapiro, J., B. Forsberg, V. Lamarra, M. Lynch, E. Smeltzer G. Zoto, 1982. Experiments and experiences in biomanipulation: studies of biological ways to reduce algal abundance and eliminate bluegreens. EPA 600/382096, 251 pp.Google Scholar
  27. Shapiro, J., 1990. Current beliefs regarding dominance by bluegreens: The case for the importance of CO2 and pH. Verh. int. Ver. Limnol. 24: 38–54.Google Scholar
  28. Sommer, U. (ed.), 1989. Plankton Ecology. Springer-Verlag, Berlin, 358 pp.Google Scholar
  29. Sommer, U., 1985. Comparison between steady state and non-steady state competition: Experiments with natural phytoplankton. Limnol. Oceanogr. 30: 335–346.CrossRefGoogle Scholar
  30. Song, K. O., 1992. Water quality modeling in the Nakdong River. PhD. dissertation. National Fisheries, University of Pusan, Pusan, 134 pp.Google Scholar
  31. Stoyneva, M. P. & S. J. Draganov, 1991. Green algae in the phytoplankton of the Danube (Bulgarian sector) – species composition, distribution, cell numbers and biomass. Arch. Protistenkd. 139: 243–260.Google Scholar
  32. Wetzel, R. G., 1983. Limnology. 2nd Edition. Saunders College Publishing, Philadelphia, 860 pp.Google Scholar

Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Kyong Ha
  • Hyun-Woo Kim
  • Gea-Jae Joo

There are no affiliations available

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