, Volume 191, Issue 1, pp 15–21 | Cite as

Some characteristics of the community of autotrophs of Lake Sevan in connection with its eutrophication

  • A. S. Parparov
Long-term changes


Eutrophication of Lake Sevan caused by the artificial lowering of water level was accompanied by changes in the structure and dynamics of the planktonic communities. A dominance of diatoms up to 1983 was changed to that of green algae in the last years. Primary production of plankton rose and then decreased in the process of eutrophication. The annual average primary production in 1982–1986 — 250 g C m−2 yr−1 — is evidently close to the steady state production under the present morphometry of the lake. The activity coefficient of phytoplanktonic photosynthesis changed within relatively narrow limits, in spite of significant changes in the concentrations of major nutrients and in the structure and productivity of the phytoplankton.

Key words

Lake Sevan water level lowering eutrophication phytoplankton primary productivity 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Boulyon, V. V., 1983. Primary production of plankton of internal waterbodies. ‘Nauka’, Leningrad, 149 pp. (in Russian).Google Scholar
  2. Gambaryan, M. Ye., 1968. Microbiological studies on Lake Sevan. Yerevan, 165 pp. (in Russian).Google Scholar
  3. Gambaryan, P. P., 1984. Macrophytes of Lake Sevan. In: Limnology of alpine lakes. Yerevan, 55–56 (in Russian).Google Scholar
  4. Gyozalyan, M. G., 1984. Some modern morphometric and hydrologic parameters of Minor and Major Sevan. In: Limnology of alpine lakes. Yerevan, 57–58 (in Russian).Google Scholar
  5. Kazaryan, H. G., 1979. Data for studying the phytoplankton of Lake Sevan. In: Ecology of hydrobionts of Lake Sevan. Yerevan, 75–87 (in Russian).Google Scholar
  6. Legovich, N. A., 1968. Changes of structure of the phytoplankton of Lake Sevan affected by lowering of its level. Biol. J. Armenia 21 (12): 31–41 (in Russian).Google Scholar
  7. Meshkova, T. M., 1975. Objectives of development of zooplankton in Lake Sevan. Yerevan, 276 pp. (in Russian).Google Scholar
  8. Nikulina, V. N. & A. T. Mnatsakanyan, 1984. Phytoplankton of Lake Sevan in 1979–1983. In: Experimental and field studies of hydrobionts of Lake Sevan. Yerevan, 18–43 (in Russian).Google Scholar
  9. Oganesian, R. O., 1978. Present state of Lake Sevan (Armenia). Verh. int. Ver. Limnol., 20, 1103–1104.Google Scholar
  10. Oganesian, R. O. & A. S. Parparov, 1983. Ecological aspects of the problem of Lake Sevan. In: Production processes in the ecosystem of Lake Sevan. Yerevan, 5–13 (in Russian).Google Scholar
  11. Parparov, A. S., 1983. Some features of the study of primary productivity of Lake Sevan. In: Production processes in the ecosystem of Lake Sevan. Yerevan, 14–50 (in Russian).Google Scholar
  12. Parparova, R. M., 1985. Peculiarities of the cycle of phosphorus in Lake Sevan on a background of the changes of its hydrochemical regime in relation with anthropogenic influence. Avtoref. diss. Rostov-on-Don, 24 pp. (in Russian).Google Scholar
  13. SCOR-UNESCO, 1966. Rept. Work. Group 17: 9–18.Google Scholar
  14. Rossolimo, L. L., 1977. Changing of limnetic ecosystems under the influence of anthropogenic factors. ‘Nauka’, Moscow, 245 pp. (in Russian).Google Scholar
  15. Stroykina, V. G., 1953. Phytoplankton of the pelagial of Lake Sevan. Proc. Sevan Hydrobiol. Sta. Yerevan 13: 171–212 (in Russian).Google Scholar
  16. Winberg, G. G., 1960. Primary production of waterbodies. Minsk, 329 pp. (in Russian).Google Scholar

Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • A. S. Parparov
    • 1
  1. 1.Sevan Hydrobiological Station of the Academy of Sciences of Armenian SSRArm. SSRUSSR

Personalised recommendations