Thermal acclimation is not induced by habitat-of-origin, maintenance temperature, or acute exposure to low or high temperatures in a pit-building wormlion (Vermileo sp.)

Bar-Ziv, Michael A.; Scharf, Inon

doi:10.1016/j.jtherbio.2018.03.024

Cited by 12 publications

(5 citation statements)

References 49 publications

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“…This also applies to thermal experience, apparently, as the initial hindering effects of high temperature in terms of trap construction rates were diminishing over time in wormlions due to acclimatization [ 51 ]. The process of acclimatization nevertheless has its limits, as wormlion larvae kept at higher temperatures did not show an increased ability for heat shock recovery [ 53 ]. In our study, the detected differences in aggregation tendencies and trap sizes between treatment groups might be at least partly attributed to either more (25°C) or less (31°C) thermal acclimatization to our testing conditions (20°C).…”

Section: Discussionmentioning

confidence: 99%

Past thermal conditions affect hunting behaviour in larval antlions

Miler

Czarnołęski

2021

R. Soc. open sci.

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Some sit-and-wait predators, such as antlion larvae, construct traps to capture passing prey. The location of these traps depends on many abiotic and biotic factors, including temperature and the presence of conspecifics, which probably stimulate behaviours that minimize the costs and maximize the benefits of trap building. Here, we exposed second instar antlion larvae to elevated temperatures of 25°C (mild treatment) or 31°C (harsh treatment) for one month and then transferred them to common conditions (20°C) to examine the effects of previous thermal treatment on aggregation tendency and trap size. We predicted that antlions that experienced harsh conditions would subsequently increase the neighbouring distance and trap diameter to reduce competition with conspecifics and improve prey capture success, compensating for past conditions. In contrast with these predictions, antlions exposed to harsh conditions displayed a trend in the opposite direction, towards the decreased neighbouring distance. Furthermore, some of these antlions also built smaller traps. We discuss possible reasons for our results. The effects of previous thermal exposure have rarely been considered in terms of trap construction in antlions. Described effects may possibly apply to other sit-and-wait predators and are significant considering that many of these predators are long-lived.

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Section: Discussionmentioning

confidence: 99%

Past thermal conditions affect hunting behaviour in larval antlions

Miler

Czarnołęski

2021

R. Soc. open sci.

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“…Interestingly, previous studies with leaf cutter ants and worm lions across urbanization gradients also found no change in CCRT between urban and rural populations (Angilletta et al, 2007;Bar-Ziv & Scharf, 2018) which differed from general patterns in losses of CTmin in urban populations .…”

Section: Discussionmentioning

confidence: 55%

Keep your cool: Overwintering physiology in response to urbanization in the acorn ant, Temnothorax curvispinosus

Prileson¹,

Clark²,

Diamond³

et al. 2023

Preprint

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Winter presents an immense challenge for survival, yet temperate ectotherms have remarkable adaptations to physiologically compensate for these challenges. Such mechanisms are especially relevant under recent climate change where responses to warmer winters might negatively affect populations. While there is growing evidence of thermal physiological adaptations and population divergence in response to contemporary warming from the growing season, the impact of warming on overwintering ectotherms is less clear. To address this knowledge gap, we use a common garden experiment with urban and rural populations of the acorn ant, Temnothorax curvispinosus, to explore divergence in thermal physiological traits assessed following winter acclimation. Specifically, we use the thermal gradient of the urban heat island to assess population divergence in cold tolerance (chill coma recovery), metabolic rate, thermal sensitivity of metabolic rate, heat tolerance and colony demographics. Our results show there was no evidence of evolutionary divergence in low-temperature performance (chill coma recovery, metabolic rate at either of two test temperatures (4 and 10 °C) or acute thermal sensitivity of metabolic rate) among urban and rural colonies which differs from previous tests of warm-season acclimated ants. In contrast, we found winter-acclimated urban ants exhibited higher heat tolerance than rural ants with a magnitude of difference similar to growing season tests. These findings indicate that acclimation under overwintering conditions might dampen the expression of urban-rural population divergence in some thermal physiological traits and broadly suggest the potential importance of retaining at least some components of low-temperature physiology when evolving to urban heat islands and contemporary warming.

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“…More work is needed to further investigate how the durational effects of thermal stress vary according to the degree of thermal stress applied (i.e., to examine temperature × duration interactions over a wider range of temperatures). Moreover, work on more species is needed, as previous studies suggest that species vary in the degree to which cold acclimation or hardening is induced by heat stress or vice versa (Burton et al, 1988;Hemmati et al, 2014;Bar-Ziv & Scharf, 2018;Leonard & Lancaster, in press). Combined with these earlier studies, our results highlight a clear knowledge gap in understanding how interactions between intensity and duration of thermal stress can be generally predicted to affect hardening capacity.…”

Section: Discussionmentioning

confidence: 99%

Increased duration of extreme thermal events negatively affects cold acclimation ability in a high-latitude, freshwater ectotherm (Ischnura elegans; Odonata: Coenagrionidae)

Smith

Lancaster²

2020

Eur. J. Entomol.

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http://www.eje.cz acute, lengthy and increase in frequency (Kendon et al., 2018) due to the projected increase of mean global temperatures (Meehl & Tebaldi, 2004). In temperate regions that typically experience nocturnal relief from high temperature extremes, heat waves lasting 24 h or more are becoming increasingly more common: In the UK, for instance, there were 2 nights in 2018 which exceeded 20°C over a 24 h period, in comparison to 4 such nights total over the previous 10 years, and only 8

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Thermal acclimation is not induced by habitat-of-origin, maintenance temperature, or acute exposure to low or high temperatures in a pit-building wormlion (Vermileo sp.)

Cited by 12 publications

References 49 publications

Past thermal conditions affect hunting behaviour in larval antlions

Past thermal conditions affect hunting behaviour in larval antlions

Keep your cool: Overwintering physiology in response to urbanization in the acorn ant, Temnothorax curvispinosus

Increased duration of extreme thermal events negatively affects cold acclimation ability in a high-latitude, freshwater ectotherm (Ischnura elegans; Odonata: Coenagrionidae)

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