Effect of pollen provision on life‐history parameters of phytoseiid predators under hot and dry environmental conditions

Urbaneja‐Bernat, Pablo; Miret, Josep Anton Jaques

doi:10.1111/jen.12845

Cited by 6 publications

(7 citation statements)

References 68 publications

(125 reference statements)

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“…First, heat wave effects have to be verified for other fitness‐relevant traits of predator and prey, such as mating behavior, fecundity and adult survival, which may provide further shortcomings of the predator under heat stress. For example, the exposure of T. urticae and P. persimilis females to permanent 30 and 35 °C revealed differential effects on their reproductive output: it increased egg number in the prey, but decreased egg number in the predator 74 . Second, heat waves may also change the nutritional value of plants 75 occupied by spider mites, which can result in direct effects on prey 56 and indirect effects on the predator 2 .…”

Section: Discussionmentioning

confidence: 99%

“…For example, the exposure of T. urticae and P. persimilis females to permanent 30 and 35 °C revealed differential effects on their reproductive output: it increased egg number in the prey, but decreased egg number in the predator. 74 Second, heat waves may also change the nutritional value of plants 75 occupied by spider mites, which can result in direct effects on prey 56 and indirect effects on the predator. 2 Additionally, dependent on species and/or variety, plants may create microclimatic niches for both prey and predator used as temporal refuges protecting them from heat stress.…”

Section: Potential Consequences Of Heat Wave-induced Developmental Pl...mentioning

confidence: 99%

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Heat waves affect prey and predators differently via developmental plasticity: who may benefit most from global warming?

Tscholl

Nachman

Spangl

et al. 2021

Pest Management Science

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BACKGROUND: Climate warming is considered to affect the characteristics of heat waves by increasing their duration, frequency and intensity, which can have dramatic consequences for ectothermic arthropods. However, arthropods may respond to heat waves via plastic modifications, which could differently affect a predator and its prey. We examined this assumption using prominent counterparts in biological control, the predatory mite Phytoseiulus persimilis and its prey, the spider mite Tetranychus urticae. Individuals of both species were separately exposed to mild and extreme heat waves during their juvenile development.RESULTS: Both species developed faster during extreme heat waves, but the proportional increase of the developmental rates was higher in the prey. Independent of sex, P. persimilis reached smaller size at maturity under extreme heat waves, whereas the body size modifications were sex-dependent in T. urticae: males became smaller, but females were able to maintain their size.CONCLUSIONS: An accelerated development may result in the reduction of the exposure time of susceptible juvenile stages to heat waves and prey stages to predators. Plastic size adjustments caused a shift in the female predator-prey body size ratio in favor of the prey, which may lead to higher heat resistance and reduced predation risk for prey females under extreme heat waves. In conclusion, our findings indicate that species-specific shifts in age and size at maturity may result in lower suppression efficacy of the predator P. persimilis against its prey T. urticae with severe consequences for biological control of spider mites, if global warming continues.

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Section: Discussionmentioning

confidence: 99%

Section: Potential Consequences Of Heat Wave-induced Developmental Pl...mentioning

confidence: 99%

Heat waves affect prey and predators differently via developmental plasticity: who may benefit most from global warming?

Tscholl

Nachman

Spangl

et al. 2021

Pest Management Science

View full text Add to dashboard Cite

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“…Specimens of P. persimilis and T. urticae, originating from a commercial producer (Biohelp, Vienna, Austria), were used to establish lab populations, which were reared in an incubator [25 ± 1 °C, 60 ± 10% RH, 16:8 (L:D) h] and in a climate chamber [25 ± 2 °C, 60 ± 15% RH, 16:8 (L:D) h], respectively. These climatic values are optimal to rear the mites and correspond to the standard in labs dealing with these species [ 7 , 8 , 38 , 44 ]. Whole bean plants ( Phaseolus vulgaris L.) served as host plants and habitat for the stock population of T. urticae .…”

Section: Methodsmentioning

confidence: 99%

“…There is the tendency that the fecundity of the predator is more negatively affected by dry, hot climatic conditions compared to the prey [ 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. However, most studies used constant temperatures and did not include humidity effects (but see [ 44 ]). Additionally, the consequences of juvenile heat wave acclimation on female fecundity have not yet been investigated in our predator–prey couple, although heat waves led to changes in the age and size at maturity of both species [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Reproducing during Heat Waves: Influence of Juvenile and Adult Environment on Fecundity of a Pest Mite and Its Predator

Tscholl

Nachman

Spangl

et al. 2023

Biology

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The thermal history of arthropod predators and their prey may affect their reproductive performance during heat waves. Thus, a matching juvenile and adult environment should be beneficial as it enables the individuals to acclimate to extreme conditions. Prey fecundity, however, is also affected by a second stressor, namely predation risk. Here, we assessed the impact of extreme and mild heat waves on the reproductive output of acclimated (juvenile and adult heat wave conditions are matching) and non-acclimated females of the biocontrol agent Phytoseiulus persimilis, a predatory mite, and its herbivorous prey, the two-spotted spider mite Tetranychus urticae, on bean leaves. Their escape and oviposition rates and egg sizes were recorded over 10 days. Additionally, ovipositing prey females were exposed to predator cues and heat waves. Acclimation changed the escape rates and egg sizes of both species, whereas fecundity was only influenced by the adult thermal environment via increased egg numbers under extreme heat waves. Acclimation reduced predator and prey escape rates, which were higher for the predator. Pooled over acclimation, both species deposited more but smaller eggs under extreme heat waves. Acclimation dampened this effect in prey eggs, whereas acclimation resulted in smaller female eggs of the predator. Prey deposited larger male and female eggs. Predator cues reduced prey oviposition, but the effect was small compared to the large increase gained under extreme heat waves. We argue that the success of predators in controlling spider mites during heat waves mainly depends on the fates of escaping predators. A permanent absence of predators may result in the numerical dominance of prey.

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“…Among them, pollen was one of the most extensively studied alternative food in previous studies. Some research recently proved that pollen protected the predators from UV‐B and enhanced their survival under hot and dry environments (Urbaneja‐Bernat & Jaques, 2021; Yuan et al, 2021). In agricultural systems, pollen sometimes is available in the flowing season of crops and do not require any extra investment.…”

Section: Introductionmentioning

confidence: 99%

Effects of supplementary pollen on the life history traits of predatory mite Euseius nicholsi across generations

Liu

et al. 2022

J Applied Entomology

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Pollen as one of the most important supplementary food benefits the generalist predators in many aspects. However, little is known about the performance of generalist predators with type IV lifestyle when they are reared continuously on prey supplemented with pollen for many generations. In this study, the life history traits of the predatory mites Euseius nicholsi (Ehara et Lee) (Acari: Phytoseiidae) were compared when two prey species, Tetranychus urticae Koch (Acari: Tetranychidae) and Eotetranychus kanktus Ehara (Acari: Tetranychidae) were offered with the presence/absence of camellia pollen. The results showed that the mixed diet of prey and pollen significantly improved the fitness of predatory mites. Predatory mites with pollen as supplementary food developed 1 day faster than their counterparts fed only with prey. They survived much longer and produced almost twice as many eggs as their counterparts. Nevertheless, these benefits were only evident in the first few generations and faded away from Generation 5. This study advanced our understanding by indicating that the beneficial effects of supplementary pollen decreased along with generations and clarifying that T. urticae was a more nutritious prey to E. nicholsi.

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Effect of pollen provision on life‐history parameters of phytoseiid predators under hot and dry environmental conditions

Cited by 6 publications

References 68 publications

Heat waves affect prey and predators differently via developmental plasticity: who may benefit most from global warming?

Heat waves affect prey and predators differently via developmental plasticity: who may benefit most from global warming?

Reproducing during Heat Waves: Influence of Juvenile and Adult Environment on Fecundity of a Pest Mite and Its Predator

Effects of supplementary pollen on the life history traits of predatory mite Euseius nicholsi across generations

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