You are here: Home
/ Publication Information
Title: Invasion speed is affected by geographical variation in the strength of Allee effects
Author: Tobin, Patrick C.; Whitmire, Stephanie L.; Johnson, Derek M.; Bjornstad, Ottar N.; Liebhold, Andrew M.
Source: Ecology Letters. 10: 36-43.
Description: 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.
Keywords: Allee effects, biological invasions, invasion speed, Lymantria dispar, non-indigenous species, spatial and temporal heterogeneity.
View or Print this Publication (961 KB)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
Tobin, Patrick C.; Whitmire, Stephanie L.; Johnson, Derek M.; Bjornstad, Ottar N.; Liebhold, Andrew M. 2007. Invasion speed is affected by geographical variation in the strength of Allee effects. Ecology Letters. 10: 36-43.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility