Advertisement

Hydrobiologia

, Volume 35, Issue 3–4, pp 545–553 | Cite as

Changes in the fauna and flora of a nutrient enriched lake

  • N. C. Morgan
Article

Summary

Changes in the flora and fauna at Loch Leven are described. Species associated with oligotrophic conditions such as charr and desmids have declined or disappeared, and prolonged, dense algal blooms, particularly Cyanophyceae, have been a feature of recent years. Much of the macrophytic vegetation has disappeared and there have been changes in the composition of the zooplankton and benthos, several abundant species disappearing (Table II). Possible reasons for these changes are given.

Zusammenfassung

Die Veränderungen in der Pflanzen-und Tierwelt von Loch Leven werden beschrieben. Gattungen welche gewöhnlich in oligotrophen Gewässern gefunden werden, wie Salvelinus und Desmidiaceae, sind verringert oder ganz verschwunden. In den letzten Jahren sind Cyanophyceae immer haüfiger hervorgetreten. Viele höhere Pflanzen sind verschwunden und es hat sich vieles geändert in der Komposition des Zooplanktons und Benthos. Mehrere wichtige Gattungen dieser Gruppen verschwinden allmählich. Mögliche Gründe für diese Veränderungen werden gegeben.

Keywords

Phytoplankton Macrophyte Synechococcus Brown Trout Submerged Macrophyte 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Allen, K. R. - 1938 - Some observations on the biology of the trout (Salmo trutta) in Windermere. F. Anim. Ecol. 7: 333–349.CrossRefGoogle Scholar
  2. Bailey-Watts, A. E., Bindloss, M. E. & Belcher, J. H. - 1968 - Freshwater primary production by a blue-green alga of bacterial size. Nature, Lond. 220, No. 5174: 1344–1345.CrossRefGoogle Scholar
  3. Bonomi, G. - 1968 - In paper given at the ‘Symposium on large lakes and impoundments’ Uppsala, Sweden. 1968.Google Scholar
  4. Brook, A. J. - 1965 - Planktonic algae as indicators of lake types with special reference to the Desmidiaceae. Limnol. Oceanogr. 10, No. 3: 403–411.CrossRefGoogle Scholar
  5. Burnett, J. H. - 1964 - The vegetation of Scotland. 613 pp. Edinburgh and London.Google Scholar
  6. Burns-Begg, R. - 1874 - The Loch Leven Angler. 144 pp. George Barnett, Kinross, Edinburgh and Glasgow.Google Scholar
  7. Campbell, R. N. - 1955 - Food and feeding habits of brown trout, perch and other fish in Loch Tummel. Scott. Nat. 67: 23–28.Google Scholar
  8. Frost, W. E. & Smyly, W. J. P. - 1952 - The brown trout of a moorland fishpond. J. Anim. Ecol. 21: 62–86.CrossRefGoogle Scholar
  9. Holden, A. V. - 1964 - Loch Leven investigations. In Salmon and Freshwater Fisheries Research. An extract from Fisheries of Scotland. Report for 1964 22–23.Google Scholar
  10. Holden, A. V. - 1966 - Organochlorine insecticide residues in salmonid fish. J. appl. Ecol. 3 (Suppl.): 45–53.CrossRefGoogle Scholar
  11. Hrbáček, G. - 1966 - Hydrobiological Studies. 408 pp. Prague.Google Scholar
  12. Johnstone, J. M. - 1934 - The Loch Leven Angler. 148 pp. David Brown & Son, Kinross.Google Scholar
  13. Moon, H. P. - 1938 - The growth of Caenis horaria (L.), Leptophlebia vespertina (L.) and L. marginata (L.) (Ephemeroptera). Proc. Zool. Soc. Lond. 108: 507–512.Google Scholar
  14. Olney, P. J. S. - 1963 - The food and feeding habits of tufted duck Aythya fuligula. Ibis, 105: 55–62.CrossRefGoogle Scholar
  15. Olsen, S. - 1964 - Vegetation saendringer i Lingby Sø. Bidrag til analyse of kulturpavirkninger pa vand-og sumpplante vegetationen. Bot. Tidsskr., 59: 273–300.Google Scholar
  16. Rosenberg, M. - 1937 - Algae and trout. A biological aspect of the poor trout season in 1937. Salm. Trout Mag. No. 89: 313–22.Google Scholar
  17. Scott, T. - 1891 - The invertebrate fauna of the inland waters of Scotland, Part II. In 9th Ann. Rep. Fish, Board Scotland, Part III: 269–296.Google Scholar
  18. Scott, T. - 1899 - The invertebrate fauna of the inland waters of Scotland —report on special investigation. In 17th Ann. Rep. Fish. Board Scotland, Part III: 161–165.Google Scholar
  19. Van der Struik, A. - 0000 - Control of water plants. ‘The Fourth British Coarse Fish Conference’. Liverpool. 1969 (in press).Google Scholar
  20. Surber, E. W. - 1948 - Fertilization of a recreational lake to control submerged plants. Progve Fish Cult. 10, (2): 53–58.CrossRefGoogle Scholar
  21. West, G. - 1910 - A further contribution to a comparative study of the dominant phanerogamic and higher cryptogamic flora of aquatic habit in Scottish lakes. Proc. R. Soc. Edinb. 30, Part 2, (No. 6): 65–181 and 62 plates.CrossRefGoogle Scholar

Copyright information

© Dr. W. Junk n.v. Publishers 1970

Authors and Affiliations

  • N. C. Morgan
    • 1
  1. 1.Nature ConservancyEdinburghUK

Personalised recommendations