|Trumble, John - UNIV OF CA, RIVERSIDE|
Submitted to: Annual Review Of Entomology
Publication Type: Review Article
Publication Acceptance Date: June 1, 2001
Publication Date: June 1, 2002
Technical Abstract: Competitive displacement, where one species is unable to persist in a habitat through monopolistic use or defense of resources by another species, is the most severe outcome of interspecific competition. We reviewed recent cases of competitive displacement among insects and arachnids, and identified both exploitation and interference competition as sleading to those displacements. Many cases involve the operation of more than one mechanism, and many were mediated by other factors. Most, but not all, displacements occurred between closely related species. In the majority of cases, exotic species displaced native or previously established exotic species, often in anthropogenically altered habitats. Based on these cases, competitive displacement appears to be a taxonomically and ecologically widespread phenomenon. Furthermore the frequency of these displacement events likely will increase, given the ever rincreasing degree of anthropogenic changes to the environment.