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Understanding biodiversity effects on prey in multi-enemy systems.

Casula, Paolo and Wilby, Andrew and Thomas, Matthew B. (2006) Understanding biodiversity effects on prey in multi-enemy systems. Ecology Letters, 9 (9). pp. 995-1004. ISSN 1461-023X

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Abstract

Biodiversity–ecosystem functioning theory would predict that increasing natural enemy richness should enhance prey consumption rate due to functional complementarity of enemy species. However, several studies show that ecological interactions among natural enemies may result in complex effects of enemy diversity on prey consumption. Therefore, the challenge in understanding natural enemy diversity effects is to predict consumption rates of multiple enemies taking into account effects arising from patterns of prey use together with species interactions. Here, we show how complementary and redundant prey use patterns result in additive and saturating effects, respectively, and how ecological interactions such as phenotypic niche shifts, synergy and intraguild predation enlarge the range of outcomes to include null, synergistic and antagonistic effects. This study provides a simple theoretical framework that can be applied to experimental studies to infer the biological mechanisms underlying natural enemy diversity effects on prey.

Item Type: Article
Journal or Publication Title: Ecology Letters
Subjects: Q Science > QH Natural history > QH301 Biology
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 9574
Deposited By: Dr Andrew Wilby
Deposited On: 16 Jun 2008 16:19
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 18:39
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/9574

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