Physiological, developmental, and behavioral plasticity in response to thermal acclimation

Fan, Xiao L.; Lin, Zhi H.; Scheffers, Brett R.

doi:10.1016/j.jtherbio.2021.102866

Cited by 7 publications

(4 citation statements)

References 55 publications

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“…Each individual was placed in a 250‐ml flask with 200 ml (i.e., tadpoles) and 10 ml (i.e., froglets) of water, which was then placed in a temperature‐controlled water bath. The heating and cooling rates were ±0.1°C × min −1 , and the water temperature served as a proxy for body temperature in small froglets (Enriquez‐Urzelai, Sacco, et al, 2019; Fan et al, 2021, Hutchison, 1961). The initial temperature in the water bath was set at the individual's acclimation temperature.…”

Section: Methodsmentioning

confidence: 99%

“…One week after completing the metamorphic climax (ontogenetic stage 7), all remaining animals ( N = 159) were tested for both, individual CT min and CT max . Froglets were allowed to recover for 24 h between CT min and CT max measurements (Fan et al, 2021). In half of the froglets, CT min was measured first, whereas in the other half CT max was measured first.…”

Section: Methodsmentioning

confidence: 99%

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Thermal tolerance and acclimation capacity in the European common frog (Rana temporaria) change throughout ontogeny

et al. 2022

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Phenotypic plasticity may allow ectotherms with complex life histories such as amphibians to cope with climate‐driven changes in their environment. Plasticity in thermal tolerance (i.e., shifts of thermal limits via acclimation to higher temperatures) has been proposed as a mechanism to cope with warming and extreme thermal events. However, thermal tolerance and, hence, acclimation capacity, is known to vary with life stage. Using the common frog (Rana temporaria) as a model species, we measured the capacity to adjust lower (CTmin) and upper (CTmax) critical thermal limits at different acclimation temperatures. We calculated the acclimation response ratio as a metric to assess the stage‐specific acclimation capacity at each of seven consecutive ontogenetic stages and tested whether acclimation capacity was influenced by body mass and/or age. We further examined how acclimation temperature, body mass, age, and ontogenetic stage influenced CTmin and CTmax. In the temperate population of R. temporaria that we studied, thermal tolerance and acclimation capacity were affected by the ontogenetic stage. However, acclimation capacity at both thermal limits was well below 100% at all life stages tested. The lowest and highest acclimation capacity in thermal limits was observed in young and late larvae, respectively. The relatively low acclimation capacity of young larvae highlights a clear risk of amphibian populations to ongoing climate change. Ignoring stage‐specific differences in thermal physiology may drastically underestimate the climate vulnerability of species, which will hamper successful conservation actions.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Thermal tolerance and acclimation capacity in the European common frog (Rana temporaria) change throughout ontogeny

et al. 2022

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“…Thus, warm temperatures facilitate the energetically intensive process of growth, but too much heat incurred an energetic cost. Similar patterns in American alligators ( Alligator mississippiensis ) and Asiatic toad ( Bufo gargarizans ) tadpoles have been documented, where animals provided access to alternating thermal regimes demonstrated maximal growth compared to those in constant environments (Fan et al., 2021; Price et al., 2017). Reductions in growth and maintenance at constantly cold and hot temperatures are likely due to decreased digestive efficiency or limits on energy assimilation at these temperatures (McLeod & Clark, 2016; Stevenson et al., 1985).…”

Section: Discussionmentioning

confidence: 60%

“…Sandblom et al, 2016 but see Rodgers & Franklin, 2021). However, previous studies with comparable acclimation regimes have documented plasticity within the critical thermal maximum (Fan et al, 2021;Gvoždík et al, 2007), which is a harder physiological limit than panting threshold. Potentially, the critical thermal maximum may be more labile in response to changes in mean temperature than is the panting threshold.…”

Section: Rutschmannmentioning

confidence: 96%

Best of both worlds: Acclimation to fluctuating environments confers advantages and minimizes costs of constant environments

Hodgson,

Schwanz

2024

Functional Ecology

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Thermal acclimation is often considered critical in organismal responses to novel thermal conditions. Our understanding of the physiological implications of acclimation is largely derived from lab studies that either manipulate daytime basking availability or use of constant thermal regimes. In contrast, the importance of the nocturnal thermal environment (e.g. the extent of thermal respite) is often overlooked yet could play a vital role in thermal acclimation in the wild. To fill this gap, we acclimated lizards (Amphibolurus muricatus) under three thermal regimes (Hot Constant, Cold Constant and Alternating) and compared their physiological responses (Metabolic Rate, Sprint Speed, Thermal Preferences and Thermal Limits). We found that animals maintained constantly at hot temperatures (preferred temperature, 35°C) gained sprint performance increases and exhibited shifts in thermal optima not seen in those maintained constantly at cold temperatures (20°C), yet suffered costs to growth (in smaller animals) and maintenance (mass loss in larger animals). Animals maintained at alternating temperatures (12 h 20°C; 12 h 35°C) had performance benefits similar to animals in the hot treatment, without experiencing reductions in juvenile growth and adult mass. Animals acclimated under hot temperatures showed a significant lower preferred and voluntary maximum temperatures compared to animals acclimated under a cold temperature regime. We found no impact of acclimation treatment on behavioural thermal limits or standard metabolic rate. Overall, we show that alternating between access to preferred temperatures and having periods of energetic rest confer the greatest benefits for our animals. These results highlight the importance of natural body temperature variation for enhancing overall ectotherm performance and physiology, and the costs of novel thermal environments that fail to provide this variation. Read the free Plain Language Summary for this article on the Journal blog.

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Influence of landscape connectivity on newt’s response to a warmer climate

et al. 2023

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Physiological, developmental, and behavioral plasticity in response to thermal acclimation

Cited by 7 publications

References 55 publications

Thermal tolerance and acclimation capacity in the European common frog (Rana temporaria) change throughout ontogeny

Thermal tolerance and acclimation capacity in the European common frog (Rana temporaria) change throughout ontogeny

Best of both worlds: Acclimation to fluctuating environments confers advantages and minimizes costs of constant environments

Influence of landscape connectivity on newt’s response to a warmer climate

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