BioND — Dynamics of Biological Networks

Impact of cyber-invasives on a large ecological network

Anna Doizy, Edmund Barter, Jane Memmot, Karen Varnham, and Thilo Gross

Abstract

Abstract

As impacts of introduced species cascade through trophic levels, they can cause indirect and counter-intuitive effects. To investigate the impact of invasive species at a network level, we use a generalized food web model, capable of propagating changes through networks with a series of ecologically realistic criteria. Using data from a small British offshore island, we quantify the impacts of four virtual introduced species (a rat, an insectivore, a herbivore and a carnivore) and explore which clusters of species react in similar ways. The results suggest that some native species may be at risk from a wider range of invasives than previously believed. The implications of these results for ecologists and land managers are discussed.

Supporting Material