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Mobility Versus Density-Limited Predator--Prey Dynamics on Different Spatial Scales
Andre M. De Roos, Edward Mccauley and William G. Wilson
Proceedings: Biological Sciences
Vol. 246, No. 1316 (Nov. 22, 1991), pp. 117-122
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/76691
Page Count: 6
You can always find the topics here!Topics: Predators, Spatial models, Population dynamics, Density, Simulations, Metapopulation ecology, Population density, Arithmetic mean, Time series, Average linear density
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We investigate the dynamics of a predator--prey model that explicitly accounts for the spatial position and the movement behaviour of individual prey and predators, and does not assume the law of mass action. We show that limited individual mobility greatly reduces fluctuations in total density, although average densities and vital rates are virtually unaffected. We analyse the dynamics of patterns in the spatial distribution of prey and predator, which are generated by the model, and show that population dynamic observations at different spatial scales depend on the characteristic scale imposed by the individual biology.
Proceedings: Biological Sciences © 1991 Royal Society