NCEAS Project 6980

Synthesizing intraguild predation theory and data

  • Elizabeth T. Borer

ActivityDatesFurther Information
Postdoctoral Fellow1st September 2003—16th July 2004Participant List  

Although intraguild predation (IGP), a form of omnivory, is widespread in natural communities and has received significant attention in the recent theoretical and empirical literature, a gulf exists between theoretical predictions about the role of IGP in food webs and our understanding of its role in real communities. With few exceptions, the IGP literature falls into two categories operating at different time-scales: (1) theory presenting long-term effects of IGP on species persistence and population densities, and (2) short-term studies demonstrating IGP and, from theory, extrapolating the outcome for populations and communities. In addition, IGP models have been formulated for predator-prey (e.g. Holt and Polis 1997), host-parasitoid (Briggs 1993), and host-parasite (or pathogen) (e.g. Hochberg and Holt 1990) systems. Although the broad predictions of all of these model formulations are the same, this commonality is not generally recognized. I propose to synthesize this diffuse body of theory, assess the information available from short-term empirical studies, and test theoretical IGP predictions with empirical data.

TypeProducts of NCEAS Research
Presentations Borer, Elizabeth T.; Seabloom, Eric; Shurin, Jonathan B.; Anderson, Kurt E.; Blanchette, Carol A.; Broitman, Bernardo R.; Cooper, Scott D.; Halpern, Benjamin S. 2003. Within- and among-system differences in the strength of trophic cascades: Methodology or biology? August 2003. Bulletin of the Ecological Society of America. Vol: 84(3). Pages 39.
Data Set Borer, Elizabeth T.; Briggs, Cheryl J. 2004. Empirical intraguild predation studies. (Online version)
Data Set Borer, Elizabeth T. 2004. Multi-system trophic cascade dataset. (Online version)
Presentations Borer, Elizabeth T. 2004. Topic: Intraguild predation, February 2004. Department of Biology, York University. Heslington, England.
Presentations Borer, Elizabeth T. 2004. Topic: Intraguild predation, January 2004. Centre for Population Biology, Imperial College at Silwood Park. Ascot, England.
Journal Article Borer, Elizabeth T.; Halpern, Benjamin S.; Seabloom, Eric. 2006. Asymmetry in community regulation: Effects of predators and productivity. Ecology. Vol: 87(11). Pages 2813-2820.
Journal Article Borer, Elizabeth T. 2006. Does adding biological detail increase coexistence in an intraguild predation model?. Ecological Modelling. Vol: 196. Pages 447–461.
Journal Article Borer, Elizabeth T.; Hosseini, Parviez R.; Seabloom, Eric; Dobson, Andrew P. 2007. Pathogen-induced reversal of native dominance in a grassland community. Proceedings of the National Academy of Sciences. Vol: 104(13). Pages 5473-5478.
Journal Article Borer, Elizabeth T.; Briggs, Cheryl J.; Holt, Robert D. 2007. Predators, parasitoids, and pathogens: A cross-cutting examination of intraguild predation theory. Ecology. Vol: 88(11). Pages 2681-2688.
Journal Article Briggs, Cheryl J.; Borer, Elizabeth T. 2005. Why short-term experiments may not allow long-term predictions about intraguild predation. Ecological Applications. Vol: 15(4). Pages 1111-1117.
Journal Article Snyder, Robin E.; Borer, Elizabeth T.; Chesson, Peter L. 2005. Examining the relative importance of spatial and nonspatial coexistence mechanisms. American Naturalist. Vol: 166(4). Pages E75-E94.