How does heat shock affect the life history traits of adults and progeny of the aphid parasitoid<i>Aphidius avenae</i>(Hymenoptera: Aphidiidae)?

Roux, Olivier; Lann, Cécile Le; Alphen, Jacques J. M. van; Baaren, Joan van

doi:10.1017/s0007485309990575

Cited by 95 publications

(93 citation statements)

References 38 publications

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“…The +5°C heat pulse, however, had a positive effect on parasitoids as they developed into larger adults that reached adulthood faster. This supports previous work that suggests that extremely high temperatures usually have a negative effect on insects [21, 40, 41], whereas moderate fluctuations may have a neutral or a beneficial effect on them [40, 42]. …”

Section: Discussionsupporting

confidence: 91%

“…Short exposure to temperatures above the optimum (i.e. a heat shock) can lead to slower development of immature stages [19] and reduced survival, longevity and fecundity in adults [20, 21]. The negative effects of thermal stress can carry over different life stages [19, 20] and they can even have a transgenerational effect (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…The negative effects of thermal stress can carry over different life stages [19, 20] and they can even have a transgenerational effect (i.e. from the exposed adults to their offspring) [21]. …”

Section: Introductionmentioning

confidence: 99%

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Contrasting effects of heat pulses on different trophic levels, an experiment with a herbivore-parasitoid model system

et al. 2017

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Under predicted global climate change, species will be gradually exposed to warmer temperatures, and to a more variable climate including more intense and more frequent heatwaves. Increased climatic variability is expected to have different effects on species and ecosystems than gradual warming. A key challenge to predict the impact of climate change is to understand how temperature changes will affect species interactions. Herbivorous insects and their natural enemies belong to some of the largest groups of terrestrial animals, and thus they have a great impact on the functioning of ecosystems and on the services these ecosystems provide. Here we studied the life history traits of the plant-feeding insect Plutella xylostella and its specialist endoparasitoid Diadegma semiclausum, when exposed to a daily heat pulse of 5 or 10°C temperature increase during their entire immature phase. Growth and developmental responses differed with the amplitude of the heat pulse and they were different between host and parasitoid, indicating different thermal sensitivity of the two trophic levels. With a +5°C heat pulse, the adult parasitoids were larger which may result in a higher fitness, whereas a +10°C heat pulse retarded parasitoid development. These results show that the parasitoid is more sensitive than its host to brief intervals of temperature change, and this results in either positive or negative effects on life history traits, depending on the amplitude of the heat pulse. These findings suggest that more extreme fluctuations may disrupt host-parasitoid synchrony, whereas moderate fluctuations may improve parasitoid fitness.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Contrasting effects of heat pulses on different trophic levels, an experiment with a herbivore-parasitoid model system

et al. 2017

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“…In contrast to patterns for stressed H. armigera [12], D. melanogaster [11], [15], and Bicyclus anynana [43], we found effects on fertility immediately after heat exposure rather than after a few days. Heat exposure in females and males has previously been shown to strongly affect the reproductive fitness of various insect species [15], [44]–[49]. Some studies have found that heat stress leads to sterilized eggs through effects on male spermatogenesis [46], which may be more thermosensitive than oogenesis [50].…”

Section: Discussionmentioning

confidence: 99%

A Single Hot Event That Does Not Affect Survival but Decreases Reproduction in the Diamondback Moth, Plutella xylostella

et al. 2013

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Extremely hot events (usually involving a few hours at extreme high temperatures in summer) are expected to increase in frequency in temperate regions under global warming. The impact of these events is generally overlooked in insect population prediction, since they are unlikely to cause widespread mortality, however reproduction may be affected by them. In this study, we examined such stress effects in the diamondback moth, Plutella xylostella. We simulated a single extreme hot day (maximum of 40°C lasting for 3, 4 or 5 h) increasingly experienced under field conditions. This event had no detrimental effects on immediate mortality, copulation duration, mating success, longevity or lifetime fecundity, but stressed females produced 21% (after 3 or 4 h) fewer hatched eggs because of a decline in the number and hatching success of eggs laid on the first two days. These negative effects on reproduction were no longer evident in the following days. Male heat exposure led to a similar but smaller effect on fertile egg production, and exposure extended pre-mating period in both sexes. Our results indicate that a single hot day can have detrimental effects on reproduction, particularly through maternal effects on egg hatching, and thereby influence the population dynamics of diamondback moth.

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“…Short term stress exposures have been used to explore the thermal stress effects on the egg stage [12], although these types of studies do not consider the effects of daily fluctuations that might lead to cumulative effects through injury when stressful low night temperatures are followed by stressful daytime temperatures [13], [14]. In some relevant studies, changes to temperature regimens involved both means and fluctuating ranges simultaneously [15], making it hard to separate out the effects of fluctuations per se .…”

Section: Introductionmentioning

confidence: 99%

Does Thermal Variability Experienced at the Egg Stage Influence Life History Traits across Life Cycle Stages in a Small Invertebrate?

Xing

Hoffmann

2014

PLoS ONE

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Although effects of thermal stability on eggs have often been considered in vertebrates, there is little data thermal stability in insect eggs even though these eggs are often exposed in nature to widely fluctuating ambient conditions. The modularity of development in invertebrates might lead to compensation across life cycle stages but this remains to be tested particularly within the context of realistic temperature fluctuations encountered in nature. We simulated natural temperate fluctuations on eggs of the worldwide cruciferous insect pest, the diamondback moth (DBM), Plutella xylostella (L.), while maintaining the same mean temperature (25°C±0°C, 25±4°C, 25±6°C, 25±8°C, 25±10°C, 25±12°C) and assessed egg development, survival and life history traits across developmental stages. Moderate fluctuations (25±4°C, 25±6°C) did not influence performance compared to the constant temperature treatment, and none of the treatments influenced egg survival. However the wide fluctuating temperatures (25±10°C, 25±12°C) slowed development time and led to an increase in pre-pupal mass, although these changes did not translate into any effects on longevity or fecundity at the adult stage. These findings indicate that environmental effects can extend across developmental stages despite the modularity of moth development but also highlight that there are few fitness consequences of the most variable thermal conditions likely to be experienced by Plutella xylostella.

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How does heat shock affect the life history traits of adults and progeny of the aphid parasitoidAphidius avenae(Hymenoptera: Aphidiidae)?

Cited by 95 publications

References 38 publications

Contrasting effects of heat pulses on different trophic levels, an experiment with a herbivore-parasitoid model system

Contrasting effects of heat pulses on different trophic levels, an experiment with a herbivore-parasitoid model system

A Single Hot Event That Does Not Affect Survival but Decreases Reproduction in the Diamondback Moth, Plutella xylostella

Does Thermal Variability Experienced at the Egg Stage Influence Life History Traits across Life Cycle Stages in a Small Invertebrate?

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