Movement models identify management targets overlooked by common space-use models: a case study of invasive wildlife in an agroecosystem
Invited symposium | 23 Aug 14:45 | E1

Authors: Street, Garrett; Boudreau, Melanie;Ellison, Natasha;

The movements of individuals through space produce trajectories that, in aggregate, result in observed patterns of space use. Common approaches grounded in point-process models (e.g. Resource-Selection Functions, RSFs) are typically implemented to describe these patterns and to inform wildlife and landscape management. We contend that this can lead to failures in identifying critically important components of landscape structure and composition contributing to movement by and occurrence of wildlife species targeted for management, particularly when the processes of fine-scale movement and broad-scale space-use are determined by different factors (e.g. scale-dependent habitat functional responses). Here we discuss how such discrepancies can occur, why they are often linked to scale-dependencies, and how they can produce poor management decisions. We demonstrate the discrepancy in a case study of a critically invasive species (wild pigs, Sus scrofa) occupying a semi-natural agroecosystem. In particular, we show how the movement model approach identifies specific edge effects missed by the common RSF, and we identify important landscape management considerations grounded in the mechanisms driving pig movements to improve crop yields and minimize crop damage. Incorporation of movement explicitly into management-focused modeling efforts may thus provide new management targets that can improve long-term sustainability and viability of managed ecosystems.