Contribution
Seasonal patterns of protozooplankton in Lake Windermere, England
Laybourn-Parry, Johanna; Rogerson, Andrew
Archiv für Hydrobiologie Volume 129 Number 1 (1993), p. 25 - 43
42 références bibliographiques
publié: Nov 29, 1993
DOI: 10.1127/archiv-hydrobiol/129/1993/25
ArtNo. ESP141012901001, Prix: 29.00 €
Abstract
The protozoan plankton of Lake Windermere in the English Lake District was investigated during the period March to October, 1989. Flagellates, both heterotrophic and phototrophic, and ciliates dominated the protozooplankton. Sarcodines were present at low levels throughout except on a few occasions when gymnamoebae reached 50 l-1 and heliozoans 550 l-1. Peak ciliate abundance occurred during March to May in both the north and south basins of the lake, while the numerically dominant flagellate community displayed considerable variation in numbers throughout the study period. The ciliate community was dominated by oligotrichs, particularly the mixotroph Strombidium viride, vorticellids and tintinnids. The relative proportions of each group varied as a function of the trophic status of the waters. In the more oligotrophic north basin the community was dominated by oligotrichs, whereas in the more eutrophic south basin tintinnids and vorticellids were the major component. The south basin supported higher concentrations of both flagellates and ciliates. No correlation was established between chlorophyll-a concentration and ciliate abundance or between flagellate density and ciliate abundance.
Mots-clefs
Strombidium viride • protozooplankton • gymnamoebae • Lake Windermere • English Lake District