Intraguild predation in biological control: consideration of multiple resource species
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- Okuyama, T. BioControl (2009) 54: 3. doi:10.1007/s10526-008-9154-0
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Theoretical models of intraguild predation (IGP) predict that IGP decreases the effectiveness of biological control while many empirical studies do not agree with this prediction. In this study, I discuss the importance of explicit consideration of multiple resource species that has been neglected in most theoretical IGP models. In the previous models of IGP, a single resource species represented the pest species. However, there are multiple resource species (e.g., multiple pest species or aggregates of pest and non-pest species) in real systems. This study shows that models with multiple resource species can predict a variety of outcomes including those consistent with the empirical observations. The explicit consideration of resource species is useful for the future development of theories in biological control.