Allee effects and pulsed invasion by the gypsy moth

Derek M. Johnson (), Andrew M. Liebhold, Patrick C. Tobin and Ottar N. Bjørnstad
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Derek M. Johnson: University of Louisiana
Andrew M. Liebhold: Northern Research Station
Patrick C. Tobin: Northern Research Station
Ottar N. Bjørnstad: Pennsylvania State University

Nature, 2006, vol. 444, issue 7117, 361-363

Abstract: A moth in the country The spread of the Eurasian gypsy moth across the United States following its accidental introduction in 1869 is one of the most familiar and dramatic examples of a biological invasion. Invasions like this are a major threat to the stability of the world's ecosystems. Taking the gypsy moth invasion as the model, Johnson et al. show the combination of Allee effects (depressed population growth at low densities) and habitat patchiness is sufficient to cause the periodic invasion pulses that are observed. This means that it may be possible to slow invasions by gypsy moths and other species by suppressing peaks in population cycles at range borders.

Date: 2006
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DOI: 10.1038/nature05242

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