The effect of predation on the prevalence and aggregation of pathogens in prey

Su, M.; Hui, Cang

doi:10.1016/j.biosystems.2011.05.012

Cited by 16 publications

(6 citation statements)

References 46 publications

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“…Many studies have shown that increase of predator abundance or attack rate in infection systems can be an effective mechanism for controlling infectious disease dynamics, and the removal of predatory interactions could increase the prevalence of parasitic infection and as a result weaken ecosystem functioning ( AI-Shorbaji et al, 2017 ;Hudson et al, 1992 ;Packer et al, 2003 ;Raffel et al, 2010 ;Roy and Holt, 2008 ;Su and Hui, 2011 ). Here, we demonstrated that the more complex biotic interactions induced by the higher fraction of IGP interactions in a competitive community could result in lowering the prevalence of parasites ( Fig.…”

Section: Discussionsupporting

confidence: 50%

How intraguild predation affects the host diversity-disease relationship in a multihost community

Yang

Hui

2020

Journal of Theoretical Biology

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Broad evidence has shown that host diversity can impede disease invasion and reduce the eventual prevalence, but little is known on how species interactions play in shaping this host diversity-disease relationship. Previous work has illustrated that intraguild predation (IGP), combined with parasite-mediated indirect effects, can have strong influences on parasitic infection. Following this line of thinking, we here examine the role of predatory interactions in the disease transmission within a multihost community. Through varying fractions of IGP in a competitive community, we show that, dependent on the fraction of predatory interactions, species richness can switch from enhancing to inhibiting disease establishment/prevalence. Without IGP interactions, high host species richness can likely weaken the 'dilution effect' and in some cases even enhance the disease establishment (and/or prevalence) due to the existence of alternative sources for infection, whereas IGP can generally heighten the negative diversity-disease relationship due to the reduction of encounter rate between prospective hosts and parasites. Although trait-mediated interactions (captured as the infection-induced changes in predation rate) only weakly affect disease prevalence, density-mediated interactions (captured as the additional infection-induced mortality) can pose a relatively strong influence on disease transmission. Our results thus underline the importance of considering species interactions when investigating the host diversity-disease relationship.

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Section: Discussionsupporting

confidence: 50%

How intraguild predation affects the host diversity-disease relationship in a multihost community

Yang

Hui

2020

Journal of Theoretical Biology

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“…In fact, in eco-epidemiology, there are only a handful of papers including spatial interactions. Many of these spatial eco-epidemiological papers are motivated by infections within plankton communities (Malchow et al, 2004(Malchow et al, , 2005Hilker et al, 2006;Sieber et al, 2007;Siekmann et al, 2008) or lynx-rabbit dynamics (Roy and Upadhyay, 2015;Upadhyay et al, 2016), whereas there are some on a general predatorprey-disease system (Su et al, 2008(Su et al, , 2009Su and Hui, 2011;Ferreri and Venturino, 2013).…”

Section: Introductionmentioning

confidence: 99%

Preytaxis and Travelling Waves in an Eco-epidemiological Model

Bate

Hilker

2018

Bull Math Biol

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Preytaxis is the attraction (or repulsion) of predators along prey density gradients and a potentially important mechanism for predator movement. However, the impact preytaxis has on the spatial spread of a predator invasion or of an epidemic within the prey has not been investigated. We investigate the effects preytaxis has on the wavespeed of several different invasion scenarios in an eco-epidemiological system. In general, preytaxis cannot slow down predator or disease invasions and there are scenarios where preytaxis speeds up predator or disease invasions. For example, in the absence of disease, attractive preytaxis results in an increased wavespeed of predators invading prey, whereas repulsive preytaxis has no effect on the wavespeed, but the wavefront is shallower. On top of this, repulsive preytaxis can induce spatiotemporal oscillations and/or chaos behind the invasion front, phenomena normally only seen when the (non-spatial) coexistence steady state is unstable. In the presence of disease, the predator wave can have a different response to attractive susceptible and attractive infected prey. In particular, we found a case where attractive infected prey increases the predators' wavespeed by a disproportionately large amount compared to attractive susceptible prey since a predator invasion has a larger impact on the infected population. When we consider a disease invading a predator-prey steady state, we found some counter-intuitive results. For example, the epidemic has an increased wavespeed when infected prey attract predators. Likewise, repulsive susceptible prey can also increase the infection wave's wavespeed. These results suggest that preytaxis can have a major effect on the interactions of predators, prey and diseases.

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“…For instance, Wang et al (2011a) have studied the impact of the Allee effect on the spatial structure and temporal dynamics of an epidemic invasion. Another interesting report was reported by Su and Hui (2011), who have studied the complex dynamics in eco-epidemiological systems and the impact of predation on the epidemic transmission in spatially structured prey populations.…”

Section: Introductionmentioning

confidence: 93%