An experimental test of the role of environmental temperature variability on ectotherm molecular, physiological and life-history traits: Implications for global warming

Folguera, Guillermo; Bastías, Daniel A.; Caers, Jo; Rojas, José M.; Piulachs, María‐Dolors; Bellés, Xavier; Bozinovic, Francisco

doi:10.1016/j.cbpa.2011.03.002

Cited by 85 publications

(81 citation statements)

References 38 publications

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“…While many studies have evaluated beneficial acclimation to different constant temperatures (Huey and Berrigan, 1996;Angilletta, 2009), only a handful of studies have examined physiological acclimation to fluctuating versus constant temperatures. Diurnal fluctuations in temperature have been shown to increase HSP70 synthesis (Folguera et al, 2011) and heat tolerance (Schaefer and Ryan, 2006), reduce exploratory behavior (Rojas et al, 2014) and reduce maximum metabolic rates (Bozinovic et al, 2013), but to our knowledge beneficial acclimation of optimal temperature or maximal performance has not been previously reported (Cooper et al, 2010). Given the ubiquity of diurnal fluctuations in terrestrial environments, this issue deserves further study.…”

Section: Acclimation Of Thermal Performance Curvesmentioning

confidence: 92%

“…The role of diurnal fluctuations in temperature (DFT) in causing time-dependent effects like stress and acclimation is poorly understood for most ectotherms. Several recent studies that consider the consequences of diurnal fluctuations reveal a variety of positive, neutral and negative responses for metabolic rate, mortality and heat tolerance (Schaefer and Ryan, 2006;Cooper et al, 2010;Bozinovic et al, 2011;Folguera et al, 2011;Rojas et al, 2014;Xing et al, 2014). For example, DFT during development increased HPS70 protein synthesis, metabolic rate and mortality in a woodlouse (Folguera et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Fluctuating temperatures and ectotherm growth: distinguishing non-linear and time-dependent effects

Kingsolver

Higgins

Augustine

2015

Journal of Experimental Biology

146

195

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Most terrestrial ectotherms experience diurnal and seasonal variation in temperature. Because thermal performance curves are non-linear, mean performance can differ in fluctuating and constant thermal environments. However, time-dependent effects -effects of the order and duration of exposure to temperature -can also influence mean performance. We quantified the non-linear and time-dependent effects of diurnally fluctuating temperatures for larval growth rates in the tobacco hornworm, Manduca sexta L., with four main results. First, the shape of the thermal performance curve for growth rate depended on the duration of exposure: for example, optimal temperature and thermal breadth were greater for growth rates measured over short (24 h during the last instar) compared with long (the entire period of larval growth) time periods. Second, larvae reared in diurnally fluctuating temperatures had significantly higher optimal temperatures and maximal growth rates than larvae reared in constant temperatures. Third, for larvae maintained at three mean temperatures (20, 25 and 30°C) and three diurnal temperature ranges (±0, ±5 and ±10°C), diurnal fluctuations had opposite effects on mean growth rates at low versus high mean temperature. Fourth, both short-and long-term thermal performance curves yielded poor predictions of the non-linear effects of fluctuating temperature on mean growth rates (compared with our experimental results) at higher mean temperatures. Our results suggest caution in using constant temperature studies to model the consequences of variable thermal environments.

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Section: Acclimation Of Thermal Performance Curvesmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Fluctuating temperatures and ectotherm growth: distinguishing non-linear and time-dependent effects

Kingsolver

Higgins

Augustine

2015

Journal of Experimental Biology

146

195

View full text Add to dashboard Cite

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“…Differences in mean survival between optimum and stressful salinity pre-treatments were tested using the log-rank (Mantel-Cox) test (e.g. Folguera et al, 2011;Kefford et al, 2012). Generalized linear models (GLMs) were used to test for differences between the two salinity pre-treatments in WC s and WLR under the subsequent desiccation.…”

Section: Effect Of Salinity On Desiccation Resistancementioning

confidence: 99%

Aquatic insects in a multistress environment: cross-tolerance to salinity and desiccation

Pallarés

Botella‐Cruz

Arribas

et al. 2017

Journal of Experimental Biology

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Exposing organisms to a particular stressor may enhance tolerance to a subsequent stress, when protective mechanisms against the two stressors are shared. Such cross-tolerance is a common adaptive response in dynamic multivariate environments and often indicates potential co-evolution of stress traits. Many aquatic insects in inland saline waters from Mediterranean-climate regions are sequentially challenged with salinity and desiccation stress. Thus, cross-tolerance to these physiologically similar stressors could have been positively selected in insects of these regions. We used adults of the saline water beetles Enochrus jesusarribasi (Hydrophilidae) and Nebrioporus baeticus (Dytiscidae) to test cross-tolerance responses to desiccation and salinity. In independent laboratory experiments, we evaluated the effects of (i) salinity stress on the subsequent resistance to desiccation and (ii) desiccation stress (rapid and slow dehydration) on the subsequent tolerance to salinity. Survival, water loss and haemolymph osmolality were measured. Exposure to stressful salinity improved water control under subsequent desiccation stress in both species, with a clear cross-tolerance (enhanced performance) in N. baeticus. In contrast, general negative effects on performance were found under the inverse stress sequence. The rapid and slow dehydration produced different water loss and haemolymph osmolality dynamics that were reflected in different survival patterns. Our finding of cross-tolerance to salinity and desiccation in ecologically similar species from distant lineages, together with parallel responses between salinity and thermal stress previously found in several aquatic taxa, highlights the central role of adaption to salinity and co-occurring stressors in arid inland waters, having important implications for the species' persistence under climate change.

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“…For instance, in a recent study with Drosophila melanogaster, temperature variability around a 178C mean had a positive effect on the maximal population growth rate, whereas the same amount of variability around a 248C mean had a negative effect [7]. Other studies have demonstrated varied effects of thermal variation on growth rates [9], development time [25] and fecundity [24,26], disease transmission [27,28] and stress resistance [29]. Given the ubiquity of nonlinearity of TPCs, the relationship between thermal variation and biological performance undoubtedly plays a key role in many aspects of a species' ecology.…”

Section: Introductionmentioning

confidence: 99%

Increased temperature variation poses a greater risk to species than climate warming

et al. 2014

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Increases in the frequency, severity and duration of temperature extremes are anticipated in the near future. Although recent work suggests that changes in temperature variation will have disproportionately greater effects on species than changes to the mean, much of climate change research in ecology has focused on the impacts of mean temperature change. Here, we couple finegrained climate projections (2050-2059) to thermal performance data from 38 ectothermic invertebrate species and contrast projections with those of a simple model. We show that projections based on mean temperature change alone differ substantially from those incorporating changes to the variation, and to the mean and variation in concert. Although most species show increases in performance at greater mean temperatures, the effect of mean and variance change together yields a range of responses, with temperate species at greatest risk of performance declines. Our work highlights the importance of using fine-grained temporal data to incorporate the full extent of temperature variation when assessing and projecting performance.

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An experimental test of the role of environmental temperature variability on ectotherm molecular, physiological and life-history traits: Implications for global warming

Cited by 85 publications

References 38 publications

Fluctuating temperatures and ectotherm growth: distinguishing non-linear and time-dependent effects

Fluctuating temperatures and ectotherm growth: distinguishing non-linear and time-dependent effects

Aquatic insects in a multistress environment: cross-tolerance to salinity and desiccation

Increased temperature variation poses a greater risk to species than climate warming

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