Differential response to mosquito host sex and parasite dosage suggest mixed dispersal strategies in the parasite Ascogregarina taiwanensis

Soghigian, John; Livdahl, Todd P.

doi:10.1371/journal.pone.0184573

Cited by 11 publications

(21 citation statements)

References 38 publications

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“…used by A. taiwanensis based on host sex and environmental cues [27]. While Ascogregarine parasites in mosquitoes have served as a model system to investigate the evolutionary biology and physiological impacts of parasitism, their association with the composition of the mosquito microbiome and potential use as a biocontrol [22] remains poorly resolved.…”

Section: Plos Neglected Tropical Diseasesmentioning

confidence: 99%

The Aedes albopictus (Diptera: Culicidae) microbiome varies spatially and with Ascogregarine infection

et al. 2020

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The mosquito microbiome alters the physiological traits of medically important mosquitoes, which can scale to impact how mosquito populations sustain disease transmission. The mosquito microbiome varies significantly within individual mosquitoes and among populations, however the ecological and environmental factors that contribute to this variation are poorly understood. To further understand the factors that influence variation and diversity of the mosquito microbiome, we conducted a survey of the bacterial microbiome in the medically important mosquito, Aedes albopictus, on the high Pacific island of Maui, Hawai'i. We detected three bacterial Phyla and twelve bacterial families: Proteobacteria, Acitinobacteria, and Firmicutes; and Anaplasmataceae, Acetobacteraceae, Enterobacteriaceae, Burkholderiaceae, Xanthobacteraceae, Pseudomonadaceae, Streptomycetaceae, Staphylococcaceae, Xanthomonadaceae, Beijerinckiaceae, Rhizobiaceae, and Sphingomonadaceae. The Ae. albopictus bacterial microbiota varied among geographic locations, but temperature and rainfall were uncorrelated with this spatial variation. Infection status with an ampicomplexan pathosymbiont Ascogregarina taiwanensis was significantly associated with the composition of the Ae. albopictus bacteriome. The bacteriomes of mosquitoes with an A. taiwanensis infection were more likely to include several bacterial symbionts, including the most abundant lineage of Wolbachia sp. Other symbionts like Asaia sp. and several Enterobacteriaceae lineages were less prevalent in A. taiwanensis-infected mosquitoes. This highlights the possibility that inter-and intra-domain interactions may structure the Ae. albopictus microbiome.

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Section: Plos Neglected Tropical Diseasesmentioning

confidence: 99%

The Aedes albopictus (Diptera: Culicidae) microbiome varies spatially and with Ascogregarine infection

et al. 2020

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“…triseriatus was found in one study to have as high as 2.8 to 3.5 greater death rates when infected [25]. In a relatively recent study by Soghigian and Livdahl [51], they show that in the absence of parasite infection, survival of Ae. albopictus is about 98%, but with the greatest amount of infection observed, the survival decreases to approximately 71%.…”

Section: Albopictusmentioning

confidence: 90%

“…The effects of parasitism for Ae. albopictus on female fecundity (γ ba ), larval development rate (γ da ), and larval mortality (γ ma ) were shown to vary with resource availability and environmental context [23,7,25,51]. In Comiskey et al [23], they found that in low resources the mortality of infected Ae.…”

Section: Albopictusmentioning

confidence: 98%

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Parasitism of Aedes albopictus by Ascogregarina taiwanensis lowers its competitive ability against Aedes triseriatus.

Stump

Childs

Walker

2020

Preprint

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Background: Mosquitoes are vectors for diseases that significantly impact the human population such as dengue, malaria and La Crosse virus. When multiple mosquito species are present, the competition between species may alter population dynamics as well as disease spread. Two mosquito species, Aedes albopictus and Aedes triseriatus, both inhabit areas where La Crosse virus is found. Infection of Aedes albopictus by the parasite Ascogregarina taiwanensis and Aedes triseriatus by the parasite Ascogregarina barretti can decrease a mosquito’s fitness, respectively. In particular, the decrease in fitness of Aedes albopictus occurs through the impact of Ascogregarina taiwanensis on female fecundity, larval development rate, and larval mortality and may impact its initial competitive advantage over Aedes triseriatus during invasion.Methods: We examine the effects of parasitism of gregarine parasites on Aedes albopictus and triseriatus population dynamics and competition with a focus on when Aedes albopictus is new to an area. We build a compartmental model including competition between Aedes albopictus and triseriatus while under parasitism of the gregarine parasites. Using parameters based on literature, we simulate the dynamics and analyze the equilibrium population proportion of the two species. We consider the presence of both parasites and potential dilution effects.Results: We show that increased levels of parasitism in Aedes albopictus will decrease the initial competitive advantage of the species over Aedes triseriatus and increase the survivorship of Aedes triseriatus. We find Aedes albopictus is better able to invade when there is more extreme parasitism of Aedes triseriatus. Furthermore, although the transient dynamics differ, dilution of the parasite density through uptake by both species does not alter the equilibrium population sizes of either species.Conclusions: Mosquito population dynamics are affected by many factors, such as abiotic factors (e.g. temperature and humidity) and competition between mosquito species. This is especially true when multiple mosquito species are vying to live in the same area. Knowledge of how population dynamics are affected by gregarine parasites among competing species can inform future mosquito control efforts and help prevent the spread of vector-borne disease.

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“…triseriatus , infection can alter larval behaviour (Soghigian, Valsdottir, & Livdahl, ), prolong female development time (Walker, Poirier, & Veldman, ) and decrease adult size (Siegel, Novak, & Maddox, ; Walker et al, ). These indirect effect can potentially reduce mosquito fecundity and population growth (Soghigian & Livdahl, ). Field and laboratory surveys indicate few As .…”

Section: Methodsmentioning

confidence: 99%

Invasive species reduces parasite prevalence and neutralizes negative environmental effects on parasitism in a native mosquito

Westby

Sweetman

Horn

et al. 2019

Journal of Animal Ecology

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Invasive species research often focuses on direct effects of invasion on native ecosystems and less so on complex effects such as those influencing host–parasite interactions. However, invaders could have important effects on native host–parasite dynamics. Where infectious stages are ubiquitous and native host–pathogen specificity is strong, invasive less‐competent hosts may reduce the pool of infectious stages, effectively reducing native host–parasite encounter rate. Alternatively, invasive species could alter transmission via changes in native species abundance. Biotic and abiotic environmental factors can also impact disease dynamics by altering host or parasite condition. However, little is known about potential interactive effects of invasion and environmental context on native species disease dynamics. Moreover, experimental examinations of the mechanisms driving dilution effects are limited, but serve to provide tests of predictions leading to diversity–disease relationships. Using field and laboratory experiments, we tested competing hypotheses that an invasive species reduces the prevalence of a native parasite in its host by removing infectious propagules from the environment or by reducing native host abundance. In addition, we evaluated the role of detritus quantity as a resource base in mediating effects of the invasive species. Native parasite prevalence was reduced when the invasive species was present. Prevalence was also higher in high detritus habitats, although this effect was lost when the invasive species was present. The invasive species significantly reduced infectious propagules from the aquatic habitats. Presence of the invasive species had no effect on the native species abundance; thus, the reduction in parasitism was not due to changes in host density but through a reduction in infectious propagule encounters. We conclude that an invasive species can facilitate a native species by reducing parasite prevalence via a dilution effect and that these effects can be modified by resource level. Reductions in parasitism may have ripple effects throughout the community, altering the strength of competitive interactions, predation rates or coinfection with other pathogens. We advocate considering potential positive effects of invasive species on recipient communities, in addition to effects of invasions on host–parasite interactions to gain a broader understanding of the complex consequences of invasion.

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Differential response to mosquito host sex and parasite dosage suggest mixed dispersal strategies in the parasite Ascogregarina taiwanensis

Cited by 11 publications

References 38 publications

The Aedes albopictus (Diptera: Culicidae) microbiome varies spatially and with Ascogregarine infection

The Aedes albopictus (Diptera: Culicidae) microbiome varies spatially and with Ascogregarine infection

Parasitism of Aedes albopictus by Ascogregarina taiwanensis lowers its competitive ability against Aedes triseriatus.

Invasive species reduces parasite prevalence and neutralizes negative environmental effects on parasitism in a native mosquito

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