Title: The role of Allee effects in gypsy moth, Lymantria dispar (L.), invasions
Author: Tobin, Patrick C.; Robinet, Christelle; Johnson, Derek M.; Whitmire, Stefanie L.; Bjornstad, Ottar N.; Liebhold, Andrew M.
Source: Population Ecology. 51: 373-384.
Description: Allee effects have been applied historically in efforts to understand the low-density population dynamics of rare and endangered species. Many biological invasions likewise experience the phenomenon of decreasing population growth rates at low population densities because most founding populations of introduced nonnative species occur at low densities. In range expansion of established species, the initial colonizers of habitat beyond the organism's current range are usually at low density, and thus could be subject to Allee dynamics. There has been consistent empirical and theoretical evidence demonstrating, and in some cases quantifying, the role of Allee dynamics in the gypsy moth, Lymantria dispar (L.), invasion of North America. In this review, we examine the potential causes of the Allee effect in the gypsy moth and highlight the importance of mate-finding failure as a primary mechanism behind an Allee effect, while the degree to which generalist predators induce an Allee effect remains unclear. We then explore the role of Allee effects in the establishment and spread dynamics of the gypsy moth system, which conceptually could serve as a model system for understanding how Allee effects manifest themselves in the dynamics of biological invasions.
Keywords: biological invasions, establishment, invasion dynamics, nonindigenous species, spread
View or Print this Publication (1.3 MB)
- 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.; Robinet, Christelle; Johnson, Derek M.; Whitmire, Stefanie L.; Bjornstad, Ottar N.; Liebhold, Andrew M. 2009. The role of Allee effects in gypsy moth, Lymantria dispar (L.), invasions. Population Ecology. 51: 373-384.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility