How seasonality influences the thermal biology of lizards with different thermoregulatory strategies: a meta‐analysis

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2023, Volume and Issue: 99(2), P. 409 - 429

Published: Oct. 23, 2023

ABSTRACT Ectotherms that maintain thermal balance in the face of varying climates should be able to colonise a wide range habitats. In lizards, thermoregulation usually appears as variety behaviours buffer external influences over physiology. Basking species rely on solar radiation raise body temperatures and show high thermoregulatory precision. By contrast, do not bask are often constrained by climatic conditions their habitats, thus having lower While much focus has been given effects mean habitat temperatures, relatively less is known about how seasonality affects biology lizards macroecological scale. Considering current climate crisis, assessing cope with temporal variations environmental temperature essential understand better these organisms will fare under change. Activity ( T b ) represent internal an animal measured nature during its active period (i.e. realised niche), preferred pref those selected laboratory gradient lacks costs fundamental niche). Both traits form bulk ecology research studied context seasonality. this study, we used meta‐analysis test seasonal variation differ strategy (basking versus non‐basking). Based 333 effect sizes from 137 species, found varied greater magnitude than across seasons. Variations were influenced seasonality; however, size mediated responses. Specifically, larger subjected , basking endured compared non‐basking species. On other hand, increased regardless size. Thermoregulatory also suggesting behaviour important role mediating responses landscape. After controlling for phylogenetic effects, showed significantly lizard families. Taken together, our results support notion relationship between parameters can taxon trait dependent. Our showcase importance considering ecological behavioural aspects studies. We further highlight systematic, geographical, knowledge gaps research. work benefit who aim more fully shapes ultimately contributing goal elucidating evolution temperature‐sensitive ectotherms.

Language: Английский

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Impact of food availability on the thermal performance curves of male European green lizards (Lacerta viridis)

Oecologia, Journal Year: 2025, Volume and Issue: 207(4)

Published: April 1, 2025

Abstract In a changing environment, characterized by human-induced rapid environmental change (HIREC), understanding the impacts of stressors on reptile species is crucial. Preferred body temperatures (PBT) and thermal performance curves (TPCs) are comprehensive physiology traits reflecting overall physiological crucial for predicting species-specific responses to changes. There limited or conflicting information how food availability affect PBT TPCs lizard species, despite their significance in context global decline species. The aim this study was experimentally investigate deprivation affects European green lizards ( Lacerta viridis ). We exposed 30 adult male optimal suboptimal treatments. assessed PBTs, based optimum (T o ), maximum (P max ) breadth (B 80 lizards. found that had significant impact preferred temperature locomotor performance. Lizards experiencing conditions showed preference lower temperatures, indicating an intention minimize energy expenditure during fasting. Additionally, food-deprived wider B range, suggesting acclimatization maintain effective across broader range. Our findings highlight importance as key stressor influencing thermoregulation strategies. As habitat modifications warming continue, it evaluate these changes development conservation

Language: Английский

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Seasonal plasticity in the thermal sensitivity of metabolism but not water loss in a fossorial ectotherm

Oecologia, Journal Year: 2025, Volume and Issue: 207(5)

Published: April 23, 2025

Language: Английский

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Seasonal plasticity in the thermal sensitivity of metabolism but not water loss in a fossorial ectotherm

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Ectotherms from highly seasonal habitats should have enhanced potential for physiological plasticity to cope with climatic variability. However, whether this pattern is applicable fossorial ectotherms, who are potentially buffered thermal variability, still unclear. Here, we evaluated how acclimatisation (spring vs. autumn) affected the sensitivity of standard metabolic rates (SMR), evaporative water loss (EWL), and skin resistance (R_s) in spotted salamander (Ambystoma maculatum). We hypothesised that temperature would both short- long-term effects over traits (i.e., acute exposure test temperatures acclimatisation, respectively). After accounting body mass sex, found short-term changes led an increase SMR, EWL, R_s. Additionally, SMR R_s differed between seasons, but EWL did not. Sustaining low high spring may allow salamanders allocate energy toward overwintering emergence breeding while simultaneously maximising conservation. By contrast, maintaining autumn forage aboveground on rainy nights replenish reserves preparation winter. Despite common assumption ectotherms effects, our study shows functional differences seasons provisioning accompanied by energetic hydroregulatory requirements.

Language: Английский

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Changes in marine iguana (Amblyrhynchus cristatus) heart rates suggest reduced metabolism during El Niño events

Journal of Zoology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 24, 2025

Abstract Marine iguanas occasionally face severe food shortages because of algal dieback during El Niño events. Research on their adaptations to these periods has highlighted unique ability shrink in body length, which reduces energetic needs. Additional mechanisms, like sustaining lower temperatures and metabolic rates, could potentially also energy consumption, but have never been examined. We measured 665 over an 11‐year period including three events, examined how heart rates (a proxy for rates) change with sea‐surface temperature oscillations (Oceanic Index, ONI). Heart rate (adjusting size, temperature, season, study site) was negatively correlated ONI Niño, whereas the adjusted did not correlate or differ between other periods. therefore hypothesize that marine can depress response harsh conditions, adaptation is complementary shrinking may further enhance survival through limited food. Direct measurements are needed test this hypothesis.

Language: Английский

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Regional heterothermy inMegasoma gyasis not related to active heat dissipation by the horns

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

Abstract Animals rely on physiological and behavioral processes to maintain thermal balance. Some animals, however, bear structures that help dissipate excess heat when body temperatures rise. Although widespread in animal weapons—exaggerated morphological with multiple characteristics can make them good at dissipating heat—have rarely been studied the context of thermoregulation. Here, we investigated whether horns Rhinoceros Beetle ( Megasoma gyas ) acted as a window. We heated live dead beetles 30ºC allowed cool 20ºC while measuring surface temperature changes four regions: cephalic thoracic horns, scutellum, abdomen. If actively dissipated heat, they would show lowest cooling rate among regions. Contrary this expectation, found horn had highest rate, followed by abdomen, horn, respectively. This suggests are not used for active dissipation M. . The low scutellum be explained presence large flight muscles thorax, which play role generation, but could also aid pumping hemolymph across tagmata or through low-insulated cuticle prevent overheating. demonstrate regional heterothermy even absence exercise stress. As such, propose may result from both (control flow) passive (heat poorly insulated structures) within individuals.

Language: Английский

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Regional heterothermy in Megasoma gyas is not related to active heat dissipation by the horns

Insect Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Language: Английский

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Microclimate variability impacts the coexistence of highland and lowland ectotherms

Journal of Animal Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Abstract Understanding differences in life‐history outcomes under variable abiotic conditions is essential for understanding species coexistence. At middle elevations, a mosaic of available sets could allow highland and lowland the same ecological guild to overlap. Therefore, these sites are excellent study influence on life history and, thus, spatial overlap patterns competing species. To test outcomes, we selected pair closely related lacertids, Iberolacerta horvathi Podarcis muralis , with an overlapping geographical range but contrasting elevational distribution. assess how biotic factors contribute realized niches both species, first built dynamic energy budget (DEB) models each based functional data. Then, used mechanistic modelling framework (NicheMapR) simulate microclimatic at 15 across gradient performed whole life‐cycle simulations compare egg development times, lifespans, reproductive years, mean yearly basking foraging times fecundity syntopy allotopy along gradient. Our show that variability affects traits We found strong effects elevation such as longevity, activity fecundity. also observed syntopy/allotopy output. In addition, significant interplay between impacting where occupying higher habitats resulted more pronounced reduction P. . Furthermore, using two different thermal preferences spring summer, some physiological change seasonal changes preferences. Based our simulations, conclude intermediate elevations harbour majority syntopic populations exhibit high environmental likely facilitating Since model predictions support current distribution not only affected by factors, this suggests past historical contingencies might have played role. provides understand interacting comparing responses changing

Language: Английский

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Hydrothermal physiology and vulnerability to climatic change: insight from European vipers

Journal of Thermal Biology, Journal Year: 2025, Volume and Issue: 129, P. 104115 - 104115

Published: April 1, 2025

Language: Английский

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Changes in thermal preference, respiratory and metabolic patterns in Tropidurus torquatus: Population responses from two distinct Brazilian biomes

Comparative Biochemistry and Physiology Part A Molecular & Integrative Physiology, Journal Year: 2025, Volume and Issue: unknown, P. 111871 - 111871

Published: April 1, 2025

Language: Английский

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