Distinct responses and range shifts of lizard populations across an elevational gradient under climate change

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(10), P. 2669 - 2680

Published: Feb. 27, 2023

Abstract Ongoing climate change has profoundly affected global biodiversity, but its impacts on populations across elevations remain understudied. Using mechanistic niche models incorporating species traits, we predicted ecophysiological responses (activity times, oxygen consumption and evaporative water loss) for lizard at high‐elevation (<3600 m asl) extra‐high‐elevation (≥3600 under recent (1970–2000) future (2081–2100) climates. Compared with their counterparts, lizards from are to experience a greater increase in activity time consumption. By integrating these into hybrid distribution (HSDMs), were able make the following predictions two warming scenarios (SSP1‐2.6, SSP5‐8.5). 2081–2100, predict that both high‐ will shift upslope; gain more lose less habitat than congeners. We therefore advocate conservation of context change, especially those living close lower elevational range limits. In addition, by comparing results HSDMs traditional models, highlight importance considering intraspecific variation local adaptation physiological traits along gradients when forecasting species' distributions change.

Language: Английский

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Squamate metabolic rates decrease in winter beyond the effect of temperature

Journal of Animal Ecology, Journal Year: 2023, Volume and Issue: 92(11), P. 2163 - 2174

Published: Aug. 26, 2023

The reptilian form of hibernation (brumation) is much less studied than its mammalian and insect equivalents. Hibernation brumation share some basic features but may differ in others. Evidence for hypometabolism brumating reptiles beyond the effect temperature sporadic often ignored. We calculated standard metabolic rates (SMR, oxygen uptake during inactivity), winter and/or summer, 156 individuals representing 59 species Israeli squamates across all 17 local families. For 32 species, we measured same both seasons. gas exchange continuously a dark chamber, under average January high low temperatures (20°C 12°C), daytime nighttime. examined how SMR changes with season, biome, body size, time day, using phylogenetic mixed models. Metabolic increased at sunrise diurnal despite no light or other external cues, while nocturnal did not increase. Cathemeral shifted from diurnal-like diel pattern to nocturnal-like summer. Regardless Mediterranean SMRs were 30% higher similar-sized desert species. Summer together scaled size an exponent 0.84 dropped 0.71 brumation. Individuals seasons decreased their between summer by 47%, on average, 20°C 70% 12°C. Q10 was 1.75 times possibly indicating active suppression processes cold temperatures. Our results challenge commonly held perception that squamate physiology mainly shaped temperature, little role intrinsic regulation. patterns describe indicate seasonal, geographic factors can trigger remarkable shifts metabolism

Language: Английский

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A global analysis of field body temperatures of active squamates in relation to climate and behaviour

Global Ecology and Biogeography, Journal Year: 2024, Volume and Issue: 33(4)

Published: Jan. 29, 2024

Abstract Aim Squamate fitness is affected by body temperature, which in turn influenced environmental temperatures and, many species, exposure to solar radiation. The biophysical drivers of temperature have been widely studied, but we lack an integrative synthesis actual experienced the field, and their relationships temperatures, across phylogeny, behaviour climate. Location Global (25 countries on six continents). Taxa Squamates (210 representing 25 families). Methods We measured 20,231 individuals squamates field while they were active. examined how vary with substrate air taxa, climates behaviours (basking diel activity). Results Heliothermic lizards had highest temperatures. Their most weakly correlated Body non‐heliothermic diurnal similar heliotherms relation nocturnal species correlation was stronger snakes than heliotherms. Body‐substrate body‐air correlations varied mean annual all squamates, especially Thermal relations (heliothermy, nocturnality) cold converge towards same warm climates. Non‐heliotherms are better explained temperature. distributions become left‐skewed warmer‐bodied colder Main Conclusions frequency globally behavioural climatic factors. For climates, heliothermic species' consistently higher more stable other regions warmer climate these differences less pronounced. A comparable variation found non‐heliotherms, not whose irrespective macroclimatic context.

Language: Английский

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Metabolic Flexibility and High Food Availability Buffer Energy Expenditure Across Climates in a Widespread Lizard

Published: Jan. 1, 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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Linking physiology and climate to infer species distributions in Australian skinks

Journal of Animal Ecology, Journal Year: 2023, Volume and Issue: 92(10), P. 2094 - 2108

Published: Sept. 3, 2023

Abstract Climate has a key impact on animal physiology, which in turn can have profound influence geographic distributions. Yet, the mechanisms linking climate, physiology and distribution are not fully resolved. Using an integrative framework, we tested predictions of climatic variability hypothesis (CVH), states that species with broader distributions physiological tolerance than range‐restricted species, group Lampropholis skinks (8 196 individuals) along latitudinal gradient eastern Australia. We investigated several aspects including metabolism, water balance, thermal thermoregulatory behaviour ecological performance. Additionally, to test whether organismal information (e.g. physiology) enhance models, hence providing evidence climate interact shape range sizes, models incorporating better predict sizes using solely layers. In agreement CVH, our results confirm widespread tolerate perform at temperature ranges species. also found differences field body temperatures, but preference, between However, metabolism balance did correlate size. Biophysical modelling revealed incorporation behavioural data improves compared based macroclimatic inputs, mainly for By integrating niche ectothermic animals, study provides correlates Physiological responses central establishing skinks, processes occurring local scales behaviour) improve models.

Language: Английский

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The biogeography of warming tolerance in lizards

Journal of Biogeography, Journal Year: 2022, Volume and Issue: 49(7), P. 1274 - 1285

Published: May 18, 2022

Abstract Aim Many ectotherms are at risk from climate change as temperatures increasingly exceeding their thermal limits. evaluations of the vulnerability to have relied on statistical metrics derived coarse‐scale climatic data, which may result in misleading predictions. By applying an integrative approach, we investigated geographical correlates lizards change. Location Globally. Taxon Lizards. Methods We combined data lizard physiology and ecology, with high‐resolution biophysical modelling assess lizards’ calculated warming tolerance (difference between body upper limits) number hours activity. associations activity time latitude, altitude biome types. compared our approach traditional methods calculate (using solely macroclimatic data). Results found no latitudinal trend temperature, but there was a weak negative correlation altitude. latitude Desert species showed narrower than tropical temperate species. had reduced when When however, it positively correlated altitude, forested biomes narrow tolerances. Main Conclusions Vulnerability can produce divergent outcomes those observed fine‐scale data. Our work indicates that ability desert cope heat stress by thermoregulating is more constrained Integrative assessments ectotherms' highlight regions should be prioritised for conservation management.

Language: Английский

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Elevational variation in metabolic rate, feeding capacity and their associations in the Asiatic toad Bufo gargarizans

Journal of Thermal Biology, Journal Year: 2024, Volume and Issue: 119, P. 103788 - 103788

Published: Jan. 1, 2024

Language: Английский

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RETRACTED: Female lizards (Eremias argus) reverse Bergmann's rule across altitude

Ecology and Evolution, Journal Year: 2023, Volume and Issue: 13(8)

Published: Aug. 1, 2023

The evolution of body size within and among species is predicted to be influenced by multifarious environmental factors. However, the specific drivers variation have remained difficult understand because wide range proximate factors that covary with ectotherm sizes across populations varying local conditions. Here, we used female

Language: Английский

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Sexual color ornamentation, microhabitat choice, and thermal physiology in the common wall lizard (Podarcis muralis)

Journal of Experimental Zoology Part A Ecological and Integrative Physiology, Journal Year: 2024, Volume and Issue: 341(9), P. 1041 - 1052

Published: Aug. 5, 2024

Abstract Common wall lizards ( Podarcis muralis ) in Italy show a striking variation body coloration across the landscape, with highly exaggerated black and green colors hot dry climates brown white cool wet climates. Males are more intensely colored than females, previous work has suggested that maintenance of landscape reflects climatic effects on strength male–male competition, through this sexual selection. However intensity competition would need to be exceptionally strong fully explain geographic patterns color variation. Thus, additional processes may contribute Here we test hypothesis selection for ornamentation context is opposed by against because genes involved regulation have pleiotropic thermal physiology, such selected Field observations revealed no association between microhabitat use or field active temperatures. Consistent these data, at extreme ends phenotypic distribution did not any differences critical minimum temperature, preferred temperature‐dependent metabolic rate, evaporative water loss when tested laboratory. Combined, results provide evidence underlie climate biology.

Language: Английский

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