Intraspecific density dependence in the dynamics of zooplankton under hypertrophic conditions

S. Declerck, V. Geenens, N. Podoor, J-M. Conde-Porcuna, Luc De Meester

Research output: Contribution to journal/periodicalArticleScientificpeer-review

Abstract

Intraspecific interactions may limit population growth of small cladoceran taxa under food-rich, hypertrophic conditions. Multiple-regression models significantly explained a large proportion of the variation in the body size adjusted fecundity and population growth rate of crustacean zooplankton taxa in a shallow, hypertrophic lake. The results of partial correlation analyses suggested exploitative competition to have only limited significance in determining the zooplankton dynamics. The analyses also revealed strong negative relationships between biomass and both body size adjusted fecundity and population growth rate within most taxa. Most of these relationships cannot be explained by food shortage or predation and suggest alternative mechanisms such as chemically mediated, intraspecific interference competition or life history shifts.
Original languageEnglish
Pages (from-to)919-928
Number of pages10
JournalCanadian Journal of Fisheries and Aquatic Sciences
Volume60
Issue number8
DOIs
Publication statusPublished - 2003
Externally publishedYes

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Keywords

  • body-size food limitation daphnia-magna clutch-size predation competition reproduction lakes field interference Fisheries Marine & Freshwater Biology

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