Invited views in basic and applied ecology - Intraguild predation with spatially structured interactions

Authored by Toshinorl Okuyama

Date Published: 2008

DOI: 10.1016/j.baae.2007.01.007

Sponsors: No sponsors listed

Platforms: NetLogo

Model Documentation: Other Narrative Mathematical description

Model Code URLs: Model code not found

Abstract

Consumer-resource interactions with intraguild predation (IGP) were studied in a spatial setting (i.e., predators catch prey and individuals reproduce within local neighborhoods only). Pair approximation (a method for deriving ordinary differential equations that approximate the dynamics of a community that interacts in a lattice environment) was used to study the effect of spatially structured species interactions. An individual-based computer simulation was used to extend the study to a case with spatially variable resource densities. The qualitative results of the pair approximation model were similar to those of the corresponding non-spatial model. However, the spatial model predicted coex((istence over a wider range of parameters than the non-spatial model when intraguild prey are nutritionally valuable to intraguild predators. Spatially heterogeneous resource distributions and spatially structured interaction could overturn the qualitative predictions of non-spatial models. (c) 2007 Gesellschaft fur Okologie. Published by Elsevier GmbH. All rights reserved.

Tags

Dynamics Productivity Coexistence population Enrichment Food webs Alternative prey Omnivory Competitors Arthropods