Effects of Intraguild Predation on Resource Competition

Revilla, Tomás A.

doi:10.1006/jtbi.2001.2448

Cited by 32 publications

(22 citation statements)

References 9 publications

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“…In ephemeral resources, it is common to find these species in the process of intraguild competition, particularly when resources are scarce (Revilla 2002;Duarte et al 2013). Muscidae species that occurred in this study exhibited this behavior.…”

Section: Discussionsupporting

confidence: 50%

Necrophagous diptera associated with wild animal carcasses in southern Brazil

Silva¹,

Hoffmeister²,

Anjos

et al. 2014

Rev. Bras. entomol.

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Section: Discussionsupporting

confidence: 50%

Necrophagous diptera associated with wild animal carcasses in southern Brazil

Silva¹,

Hoffmeister²,

Anjos

et al. 2014

Rev. Bras. entomol.

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“…1B) and thus weakens the strength of interactions and the predator reproductive numerical response, which in turn dampens oscillations between consumers and resources, promoting community persistence even at higher productivity (McCann and Hastings 1997, McCann et al 1998, Uchida et al 2007, Abrams and Fung 2010. However, other studies pointed out that Type II functional response alone does not sufficiently decrease top-down pressure and population oscillations to explain the persistence of the IG prey in productive environment (Mylius et al 2001, Revilla 2002, Krivan and Diehl 2005, Rall et al 2008. Nevertheless, Abrams and Fung (2010) recently demonstrated that the influence of Type II functional response on community stability and persistence depends on the range of functional response parameters included in food web models.…”

Section: Discussionmentioning

confidence: 99%

How functional response and productivity modulate intraguild predation

2013

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Abstract. Numerous models have been developed to predict the effect of environmental productivity on the coexistence of prey and predators within the three-species module of intraguild predation. Theoretical models have mainly used Holling Type I and Type II functional response, the latter typically best describing the functional response of a predator. However, no empirical study has simultaneously examined the form of the functional response and the effect of prey density on intraguild interactions. This is surprising considering that the strength of the functional response is crucially important for the stability of simple predator-prey systems and the persistence, sustainability and biodiversity of communities. In this study, we first developed a linear and a nonlinear functional response model for intraguild predators and next used a plant-aphid-predator mesocosm to parameterize the models and test their predictions at different prey densities. As expected, the assumptions of the linear model are not supported by empirical results which lead to systemic overestimation of the predation rate and the intensity of intraguild predation. On the other hand, the predictions of the nonlinear functional response model fit very well with experimental observations mainly because key behavioral characteristics such as handling time are integrated in this model. The nonlinear model is thus a good predictor of intraguild predation and allows a better understanding of how environmental productivity and predator behavior influence the occurrence and outcome of multiple predator interactions.

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“…The stability of the prey-only (x * 2 = 1, y * 2 = 0) and predatoronly (x * 3 = 0, y * 3 = 1) equilibria depend on relationships among several parameters ( Table 2). The eigenvalues of the predator-only equilibrium (x * 3 = 0, y * 3 = 1) are especially simple to evaluate and show that prey can invade the system when α, the competitive effect of predators on prey, is less than 1, a result consistent with IGP models that explicitly include the shared resource (Revilla 2002).…”

Section: Noncoexistence Equilibriamentioning

confidence: 83%

Using mean first passage times to quantify equilibrium resilience in perturbed intraguild predation systems

Drury

Lodge

2008

Theor Ecol

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Regime shift inducibility depends on equilibrium resilience, which depends on species interactions. When species interactions include intraguild predation (IGP), integrated pest management may induce regime shifts because enhancing the abundance of intraguild predators simultaneously increases competition with, and predation on, invasive prey. To explore the dynamical consequences of such manipulations, we use a bistable, deterministic IGP model with stochastic removals that perturb invader density from the high-density equilibrium. We quantify the combined effects of IGP and such perturbations in terms of mean first passage times (MFPTs) to target invader densities such as thresholds between regimes. Analytical MFPTs compare favorably with those generated by Monte Carlo numerical solutions of the stochastically perturbed IGP model. MFPTs can therefore usefully quantify equilibrium resilience in terms of perturbation schedules. Electronic supplementary materialThe online version of this article (

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Effects of Intraguild Predation on Resource Competition

Cited by 32 publications

References 9 publications

Necrophagous diptera associated with wild animal carcasses in southern Brazil

Necrophagous diptera associated with wild animal carcasses in southern Brazil

How functional response and productivity modulate intraguild predation

Using mean first passage times to quantify equilibrium resilience in perturbed intraguild predation systems

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