Introduction

Chown, Steven L.; Nicolson, Sue W.

doi:10.1093/acprof:oso/9780198515494.003.0001

Cited by 16 publications

(22 citation statements)

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“…Cross‐tolerance is thought to be widespread in insects, particularly with regards to environmental stressors that concomitantly occur. In seasonally and temporally varying environments, insects often survive suboptimal climatic conditions through within and across generational acclimation to different environmental stressors (Chown & Nicolson, 2004 ; Chown et al ., 2011 ; Harrison et al ., 2012 ; Sgró et al ., 2016 ; Kalra et al ., 2017 ). For example, studies have shown positive correlations between resistance to cold and desiccation, as well as between resistance to heat and desiccation stress (Bayley et al ., 2001 ; Wu et al ., 2002 , Phelan et al ., 2003 , Bubliy & Loeschcke, 2005 ; Hayward et al ., 2007 ; Singh & Prasad, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Context‐dependent integrated stress resistance promotes a global invasive pest

et al. 2022

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In nature, insects concurrently face multiple environmental stressors, a scenario likely increasing with climate change. Integrated stress resistance (ISR) thus often improves fitness and could drive invasiveness, but how physiological mechanisms influence invasion has lacked examination. Here, we investigated cross-tolerance to abiotic stress factors which may influence range limits in the South American tomato pinworma global invader that is an ecologically and socially damaging crop pest. Specifically, we tested the effects of prior rapid cold-and heat-hardening (RCH and RHH), fasting, and desiccation on cold and heat tolerance traits, as well as starvation and desiccation survivability between T. absoluta life stages. Acclimation effects on critical thermal minima (CT min ) and maxima (CT max ) were inconsistent, showing significantly deleterious effects of RCH on adult CT max and CT min and, conversely, beneficial acclimation effects of RCH on larval CT min . While no beneficial effects of desiccation acclimation were recorded for desiccation tolerance, fasted individuals had significantly higher survival in adults, whereas fasting negatively affected larval tolerances. Furthermore, fasted and desiccation acclimated adults had significantly higher starvation tolerance, showing strong evidence for cross-tolerance. Our results show context-dependent ISR traits that may promote T. absoluta fitness and competitiveness. Given the frequent overlapping occurrence of these divergent stressors, ISR reported here may thus partly elucidate the observed rapid global spread of T. absoluta into more stressful environments than expected. This information is vital in determining the underpinnings of multistressor responses, which are fundamental in forecasting species responses to changing environments and management responses.

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Section: Introductionmentioning

confidence: 99%

Context‐dependent integrated stress resistance promotes a global invasive pest

et al. 2022

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“…Observed patterns indicated the largest number of species (18) occurred at the end of the dry season and beginning of the rainy season, months corresponding to the end of the wet winter season, spring and part of summer (Gobierno del Estado 2015). Most important abiotic factors influencing distribution and abundance of species were availability of moderate water in the seasons (EDS, 16.1 mm; BRS, 74.4 mm) and ambient temperature (EDS, 14.5 to 21.15°C; BRS, 21.35 to 22.35°C) (Chown and Nicholson 2004, Gobierno del Estado 2015). However, each chrysomelid species may have its own seasonal response (greater or lesser association) to the parameters, and a particular taxon from season to season can even change niche requirements, as by tropical forest species Alagoasa trifasciata and Centralaphthona diversa (Galerucinae) (Lucio-García et al 2022).…”

Section: Resultsmentioning

confidence: 99%

Seasonal Variation of the Community of Chrysomelidae (Coleoptera) in a Temperate Forest at Tamaulipas, Mexico

Lucio-García

Horta-Vega

Venegas-Barrera

et al. 2023

Southwestern Entomologist

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Seasonal variation and its effect on structure and composition of a Coleoptera community were studied, prompted by fragmentation of land cover in natural areas. Some groups of phytophagous beetles are most abundant during the rainy season, although this contrasts with a greater number of community attributes in the season with less precipitation. The hypothesis of our study was that most chrysomelid specimens and species would be observed at the end of the dry season and beginning of the rainy season, with subfamilies Galerucinae, Eumolpinae, and Cassidinae frequent between seasons. The objective was to analyze seasonal variation of Chrysomelidae in a fragment of temperate forest in northwestern Mexico. A sweep net was used in the understory to capture specimens in quadrants. Specimens captured were in six subfamilies, 24 genera, and 31 species, which varied between dry and rainy seasons. Estimated richness was less at the beginning of the rainy season, which was reflected by the greatest percentage of complementarity, although species were present throughout a season. The greatest dominance of Chrysomelidae was in the rainy season, and largest entropy values at the end of both seasons, while diversity of abundant and dominant species was notable at the end of the dry season. Correspondence analysis revealed three faunal associations, indicating the largest number of species was associated with the end of the dry season and beginning of the rainy season, showing precipitation and ambient temperature were most important variables. The community structure between seasons differed, showing that seasonality provided a wide food resource over time, which generated variation in relative abundance and therefore in composition of chrysomelid species. Results suggested temperature variation and water availability determined establishment of Chrysomelidae among months of the year.

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“…However, this option may not be viable for pollen foragers with limited nectar stores [13]. Bees can also shunt excess heat to the head and abdomen [26], but this process may not provide sufficient cooling [28] and could result in heat injury to the head and abdomen, reducing forager efficiency or lifespan [29,30]. Bees may also choose to reduce the number or duration of pollen foraging trips [28,31] or shorten or shift their time windows for foraging [24,32].…”

Section: Discussionmentioning

confidence: 99%

Larger pollen loads increase risk of heat stress in foraging bumblebees

Naumchik,

Youngsteadt

2023

Biol. Lett.

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Global declines in bumblebee populations are linked to climate change, but specific mechanisms imposing thermal stress on these species are poorly known. Here we examine the potential for heat stress in workers foraging for pollen, an essential resource for colony development. Laboratory studies have shown that pollen foraging causes increased thoracic temperatures ( T th ) in bees, but this effect has not been examined in bumblebees nor in real-world foraging situations. We examine the effects of increasing pollen load size on T th of Bombus impatiens workers in the field while accounting for body size and microclimate. We found that T th increased by 0.07°C for every milligram of pollen carried ( p = 0.007), resulting in a 2°C increase across the observed range of pollen load sizes. Bees carrying pollen were predicted to have a T th 1.7–2.2°C hotter than those without pollen, suggesting that under certain conditions, pollen loads could cause B. impatiens workers to heat from a safe T th to one within the range of their critical thermal limits that we measured (41.3°C to 48.4°C). Bumblebees likely adopt behavioural or physiological strategies to counteract the thermal stress induced by pollen transport, and these may limit their foraging opportunities as environmental temperatures continue to increase.

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Introduction

Cited by 16 publications

References 0 publications

Context‐dependent integrated stress resistance promotes a global invasive pest

Context‐dependent integrated stress resistance promotes a global invasive pest

Seasonal Variation of the Community of Chrysomelidae (Coleoptera) in a Temperate Forest at Tamaulipas, Mexico

Larger pollen loads increase risk of heat stress in foraging bumblebees

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