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Hydrobiological Journal

ISSN Print: 0018-8166
ISSN Online: 1943-5991

Hydrobiological Journal

DOI: 10.1615/HydrobJ.v40.i1.40
10 pages

Trophic Role of Plankton Algae in the Lakes of Various Types

V. N. Nikulina
Zoological Institute Russian Academy of Sciences, Saint-Petersburg, Russia

ABSTRACT

The availability of plankton algae for filter feeding zooplankton (Cladocera) was studied in summer 1990−1997 in small lakes differing in their trophic levels, pH, color, transparency, etc. It has been found that the proportion of the biomass of phytoplankton available for Cladocera decreased with increasing the trophic level of the studied lakes. In the lakes characterized by a low productivity, Cladocera fed on mainly on algae marked by smaller dimensions, and also by a higher rate of their reproduction.