Latitudinal pattern of the thermal sensitivity of running speed in the endemic lizard <i>Liolaemus multimaculatus</i>

Stellatelli, Oscar Aníbal; Vega, Laura; Block, Carolina; Rocca, Camila; Bellagamba, Patricio J.; Dajil, Juan Esteban; Cruz, Felix Benjamin

doi:10.1111/1749-4877.12579

Cited by 8 publications

(9 citation statements)

References 106 publications

(330 reference statements)

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“…Furthermore, a similar T o (∼34°C) was estimated in other populations of L. elongatus (Bonino, Moreno Azócar, Schulte, Abdala, et al, 2015; Moreno Azócar et al, 2020). This result contrasts with the findings for other species of Liolaemus such as L. multimaculatus , from the coast of Argentina, which show a decrease in the T o in six populations along a latitudinal gradient (Stellatelli et al, 2021).…”

Section: Discussioncontrasting

confidence: 86%

“…Comparison of means or medians of maximum locomotor speeds (V max i ) of each temperature trial (20°C or 30°C) between the group acclimated at low temperature (22°C) and the group acclimated at high temperature (30°C). Argentina, which show a decrease in the T o in six populations along a latitudinal gradient (Stellatelli et al, 2021).…”

Section: Discussionmentioning

confidence: 94%

“…The thermophysiological sensitivity for locomotor performance has implications for species distributions, resilience, and persistence (Ibargüengoytía et al, 2020; Sinclair et al, 2016; Sunday et al, 2012). L. elongatus has one of the highest running speeds of the genus (Bonino et al, 2011; Brizio et al, 2021; Fernández et al, 2011; Kubisch et al, 2011; Moreno Azócar et al, 2020; Stellatelli et al, 2021), and the temperature at which it reaches its maximum speed is higher than the temperatures lizards experience in the environment. Lizards also showed plasticity in thermal sensitivity after acclimation to higher temperatures, showing the ability to respond to rising environmental temperatures in a global warming scenario.…”

Section: Discussionmentioning

confidence: 99%

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Thermophysiological plasticity could buffer the effects of global warming on a Patagonian lizard

2023

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Ecophysiological plasticity determines, to a great extent, the geographic distribution and the vulnerability of ectotherms to climate change. We studied the relationship between locomotor performance and temperature of Liolaemus elongatus lizards in three populations in northern Patagonia, Argentina, differing in thermal characteristics. We related the thermophysiological and locomotor performance parameters with the environmental conditions currently experienced by these populations and analyzed whether the expected increment of the environmental temperature due to climate change could affect these vital traits. We also determined, for one of the populations, the effects of 30 acclimation days at two temperature treatments (22°C and 30°C) on running speed, thermal preference in the laboratory (T pref ), panting threshold, and minimum critical temperature. We found that L. elongatus, despite the differences in environmental temperatures among the three sites, exhibited maximum speed at similar temperatures (optimum temperature for locomotor performance; T o ). The southern populations currently experience temperatures below that required to reach their maximum locomotor performance while the northernmost population is threatened by peaks of high temperatures that exceed the T o . Therefore, global warming could diminish lizards' running performance in northern populations and lizards may spend more time refuging and less time on other activities such as feeding, territory defense, and dispersion. However, we show evidence of plasticity in L. elongatus locomotor performance when acclimated at high temperatures resulting in a potential advantage to cushion the effect of the rising environmental temperatures expected during climate change.

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Section: Discussioncontrasting

confidence: 86%

Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

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Thermophysiological plasticity could buffer the effects of global warming on a Patagonian lizard

2023

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“…Moreover, although its thermal safety margin is currently narrow, we believe it will be capable of coping with global warming given that it has great amplitude of thermal performance together with its strategy of thermoregulation. However, studies which analyse other populations within its range of distribution are necessary, as interpopulation variations in thermoregulation behaviour (Artacho et al, 2017) and locomotor performance (Cecchetto et al, 2020; Stellatelli et al, 2021) have been reported for other species of lizards. Degrees of acclimatization (Kubisch et al, 2016) and the way in which species use thermal shelters (Vicenzi, Ibargüengoytía et al, 2019) have also been evaluated.…”

Section: Discussionmentioning

confidence: 99%

Thermal biology and locomotor performance of the Andean lizardLiolaemus fitzgeraldi(Liolaemidae) in Argentina

et al. 2022

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Ectotherms thermoregulate to maintain their body temperature within the optimal range needed for performing vital functions. The effect of climate change on lizards has been studied as regards the sensitivity of locomotor performance to environmental temperatures. We studied thermoregulatory efficiency and locomotor performance for Liolaemus fitzgeraldi in the Central Andes of Argentina. We determined body temperature, micro‐environmental temperatures and operative temperatures in the field. In the laboratory, we measured preferred temperatures and calculated the index of thermoregulatory efficiency. We estimated the thermal sensitivity of locomotion by measuring sprint speed (initial velocity and long sprint) and endurance at five different body temperatures. Body temperature was not associated with either micro‐environmental temperature, nor did it show differences with preferred temperatures. Thermoregulatory efficiency was moderate (0.61). Initial velocity and long sprint trials showed differences at different temperatures; however, endurance did not. Moreover, the optimal temperatures for the performance trials showed no significant differences among themselves. We conclude that Liolaemus fitzgeraldi has thermal sensitivity in locomotor performance with respect to body temperature and that it is an eurythermic lizard that experiences a large variation in body temperature and that has thermal flexibility in the cold.

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“…Body size is a key life-history trait [ 33 , 34 , 35 , 36 , 37 ] that is affected by some factors, including resource consumption, interactions, population dynamics and community assembly in different environments [ 38 , 39 , 40 , 41 ]. Thus, body size should be associated with metabolic rate, population density, longevity, and geographic range (see [ 38 , 42 , 43 ]). Identifying the environmental factors that affect body size variation among populations is important in order to understand how animals adapt to abiotic environments by changing their phenotypic plasticity [ 22 , 44 , 45 , 46 , 47 , 48 ].…”

Section: Introductionmentioning

confidence: 99%

Geographical Variation in Body Size and the Bergmann’s Rule in Andrew’s Toad (Bufo andrewsi)

Jiang

Zhao

Luan

et al. 2022

Biology

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Environmental variation likely modifies the life-history traits of vertebrates. As ectothermic vertebrates, it is possible that the body size of amphibians is impacted by environmental conditions. Here, we firstly quantified age and body size variation in the Andrew’s toad (Bufo andrewsi) across the Hengduan Mountains. Then, we examined the environmental correlates of this variation based on the literature and our unpublished data on the age and body size of the Andrew’s toad from 31 populations distributed in southwestern China. Although our analysis revealed significant variations in age and body size across B. andrewsi populations, neither latitude nor altitude correlated with this variability in age and body size. We found that age at sexual maturity, mean age, and longevity increased with decreasing annual mean temperature, whereas age at sexual maturity increased with decreasing temperature seasonality, implying that temperature was a crucial habitat characteristic that modulated age structure traits. Moreover, we revealed positive associations between age structure and UV-B seasonality, and negative relationships between both mean age and longevity and precipitation seasonality. We also found that body size increased with increasing precipitation in the driest month and UV-B seasonality. However, body size did not covary with temperature, signifying no support for Bergmann’s rule. These findings help us to understand amphibians’ abilities to adapt to environmental variation, which is particularly important in order to provide a theorical basis for their conservation.

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Latitudinal pattern of the thermal sensitivity of running speed in the endemic lizard Liolaemus multimaculatus

Cited by 8 publications

References 106 publications

Thermophysiological plasticity could buffer the effects of global warming on a Patagonian lizard

Thermophysiological plasticity could buffer the effects of global warming on a Patagonian lizard

Thermal biology and locomotor performance of the Andean lizardLiolaemus fitzgeraldi(Liolaemidae) in Argentina

Geographical Variation in Body Size and the Bergmann’s Rule in Andrew’s Toad (Bufo andrewsi)

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