We model optimal detection of sub-populations of invasive species that establish ahead of an advancing front. For many invaders, eradication of the main population is an untenable goal, yet it may be possible to treat and eradicate emerging sub-populations once these sub-populations are detected. We embed a dynamically optimal post-detection management plan of sub-populations into a model of optimal detection effort determination and find that optimal detection effort depends, in part, on the distance from the main front: locations closer to the front with shorter management horizons enjoy lower reductions in overall cost from intervention. The uninfested landscape is divided into two zones, characterized by different dynamically optimal management plans: a suppression zone and an eradication zone. In the suppression zone, optimal detection effort increases with distance from the front. At the distance where the suppression zone yields to the eradication zone, optimal detection effort plateaus at its maximum level.
Bibliographical noteFunding Information:
This article was partially produced under a co-operative agreement (number 58-7000-6-0081) with the Economic Research Service's (USDA) PREISM invasive species management program. This research has also been supported by the Minnesota Agricultural Experiment Station . We thank the journal referees and editor for insightful comments.
Copyright 2011 Elsevier B.V., All rights reserved.
- Invasive species
- Management over space