Intraspecific density dependence in the dynamics of zooplankton under hypertrophic conditions
Declerck, S.; Geenens, V.; Podoor, N.; Conde Porcuna, J.M.; De Meester, L. (2003). Intraspecific density dependence in the dynamics of zooplankton under hypertrophic conditions. Can. J. Fish. Aquat. Sci. 60(8): 919-928. dx.doi.org/10.1139/f03-077
In: Canadian Journal of Fisheries and Aquatic Sciences = Journal canadien des sciences halieutiques et aquatiques. National Research Council Canada: Ottawa. ISSN 0706-652X; e-ISSN 1205-7533
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.
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