Journal
ECOLOGY LETTERS
Volume 5, Issue 3, Pages 345-352Publisher
BLACKWELL PUBLISHING LTD
DOI: 10.1046/j.1461-0248.2002.00324.x
Keywords
allee effect; biological invasion; predator-prey system
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The dynamics of interacting ecological populations results from the interplay between various deterministic and stochastic factors and this is particularly the case for the phenomenon of biological invasion. Whereas the spread of invasive species via propagation of a population front was shown to appear as a result of deterministic processes, the spread via formation, interaction and movement of separate patches has been recently attributed to the influence of environmental stochasticity. An appropriate understanding of the comparative importance of deterministic and stochastic mechanisms is still lacking, however. In this paper, we show that the patchy invasion appears to be possible also in a fully deterministic predator-prey model as a result of the Allee effect.
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