, Volume 203, Issue 1–2, pp 99–110 | Cite as

The temporal and spatial patterns of protozooplankton abundance in a eutrophic temperate lake

  • Johanna Laybourn-Parry
  • Judith Olver
  • A. Rogerson
  • P. L. Duvergé


The temporal and spatial distribution of planktonic protozoa of Esthwaite, a eutrophic lake, was investigated at 7–10 day intervals between February to October 1988. Sarcodine protozoa were of little significance, the plankton was dominated by ciliates and flagellates. Ciliate density peaked in late May to early June with densities reaching 9.2 × 103 1-1. There was considerable variation in spatial distribution and greatest species diversity occurred in March/April. After the establishment of summer stratification the planktonic ciliates were confined to water of >25% oxygen saturation in the water column. Oligotrichs, particularly the genus Strombidium and tintinnids, and peritrichs dominated the ciliate assemblages. There was no correlation between chlorophyll a concentrations and ciliate numbers, but a correlation was apparent between ciliate numbers and flagellate density. There were significant differences between the protozooplankton communities at the different sampling sites in the lake.

Key words

Chlorophyll a ciliate epilimnion flagellate protozooplankton oxygen sarcodine water column 


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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • Johanna Laybourn-Parry
    • 1
  • Judith Olver
    • 1
  • A. Rogerson
    • 2
  • P. L. Duvergé
    • 1
  1. 1.Institute of Environmental and Biological SciencesUniversity of LancasterLancasterEngland
  2. 2.Culture Collection of Algae and Protozoa, Freshwater Biological Association, Ferry HouseAmblesideEngland

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