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Factors Controlling the Planktonic Community in the Shallow‐Lake of Créteil, France
Author(s) -
Lacroix Gérard,
Boët Philippe,
Garnier Josette,
LescherMoutoué Françoise,
Pourriot Roger,
Testard Paul
Publication year - 1989
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19890740402
Subject(s) - plankton , zooplankton , bloom , eutrophication , algae , ecology , predation , community structure , biology , fish <actinopterygii> , oceanography , phytoplankton , environmental science , fishery , geology , nutrient
A two‐year study on the seasonal pattern of plankton was performed in a shallow, polymictic, eutrophic lake. Autogenic successions typical of stratified lakes did not occur. Only small edible algae developed throughout the two years and Cyanophyceae rarely appeared, and did not bloom. Algal sequences depended on wind‐induced periodic mixing of water. The seasonal pattern of Rotifers varied greatly from year to year and some species depended on sporadic increases of algae. In contrast, the seasonal pattern of microcrustacea was more regular. Resting stages played an important role in zooplankton development in this variable environment. Successful fish reproduction depended a great deal on climatic conditions. The changes from year to year in predation pressure from young fish appeared to be an important factor controlling zoo‐plankton structure.