Ecology Letters (2007) 10, 36-43

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Patrick C. Tobin, Stefanie L. Whitmire, Derek M. Johnson, Ottar N. Bjørnstad and Andrew M. Liebhold (2007)
Invasion speed is affected by geographical variation in the strength of Allee effects
Ecology Letters 10 (1), 36-43
Abstract: Allee effects can play a critical role in slowing or preventing the establishment of low density founder populations of non-indigenous species. Similarly, the spread of established invaders into new habitats can be influenced by the degree to which small founder populations ahead of the invasion front are suppressed through Allee effects. We develop an approach to use empirical data on the gypsy moth, a non-indigenous invader in North America, to quantify the Allee threshold across geographical regions, and we report that the strength of the Allee effect is subject to spatial and temporal variability. Moreover, we present what is to our knowledge the first empirical evidence that geographical regions with higher Allee thresholds are associated with slower speeds of invasion.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Andrew M. Liebhold, Patrick C. Tobin

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
new introduction of pest


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Lymantria dispar