Introduction to the special issue–Beyond CT_MAXand CT_MIN: Advances in studying the thermal limits of reptiles and amphibians

Journal of Experimental Zoology Part A Ecological and Integrative Physiology, Год журнала: 2021, Номер 335(1), С. 5 - 12

Опубликована: Янв. 1, 2021

Research Highlights We contextualize contributions to the special issue emerging from a symposium at 9th World Congress of Herpetology. This collection includes recent advances in thermal biology, reviews major concepts, and guideposts for future work.

Язык: Английский

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Mechanisms of cardiac collapse at high temperature in a marine teleost (Girella nigrians)

Comparative Biochemistry and Physiology Part A Molecular & Integrative Physiology, Год журнала: 2023, Номер 286, С. 111512 - 111512

Опубликована: Сен. 17, 2023

Язык: Английский

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Climate warming has divergent physiological impacts on sympatric lizards

The Science of The Total Environment, Год журнала: 2023, Номер 912, С. 168992 - 168992

Опубликована: Дек. 3, 2023

Язык: Английский

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Sensitivity of amphibian embryos to timing and magnitude of present and future thermal extremes

Journal of Experimental Zoology Part A Ecological and Integrative Physiology, Год журнала: 2024, Номер 341(4), С. 377 - 388

Опубликована: Фев. 8, 2024

Abstract Ongoing climate change is increasing the frequency and intensity of extreme temperature events. Unlike gradual increase on average environmental temperatures, these short‐term unpredictable extremes impact population dynamics ectotherms through their effect individual survival. While previous research has predominantly focused survival rate terrestrial embryos under acute heat stress, less attention been dedicated to nonlethal effects ecologically realistic timing magnitude aquatic embryos. In this study, we investigated influence current projected embryonic life history traits hatchling behavior in alpine newt, Ichthyosaura alpestris . Using a factorial experiment controlled laboratory conditions, exposed 3‐ or 10‐day‐old different regimes temperatures for 3 days. Our results show that exposure led shortened development time an length, while not significantly affecting The duration was sensitive extremes, as early accelerated embryo development. Exposure during heightened exploratory activity hatched larvae. We conclude embryogenesis have behavioral traits. This suggests species' vulnerability might be determined by other ecophysiological beyond thermal tolerance temperate pond‐breeding amphibians.

Язык: Английский

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Nesting in Anolis Lizards: An Understudied Topic in a Well-Studied Clade

Frontiers in Ecology and Evolution, Год журнала: 2022, Номер 10

Опубликована: Май 9, 2022

Maternal nesting behavior in oviparous species strongly influences the environmental conditions their embryos experience during development. In turn, these early-life have consequences for offspring phenotypes and many fitness components across an individual’s lifespan. Thus, identifying evolutionary ecological causes effects of is a key goal behavioral ecology. Studies reptiles contributed greatly to our understanding how shapes phenotypes. While some taxonomic groups been used extensively provide insights into this important area biology, remain poorly studied. For example, squamate genus Anolis has served as model study behavior, ecology, evolution, but research focused on developmental plasticity comparatively scarce. This dearth empirical may be attributed logistical challenges (e.g., difficulty locating nests), biological factors single-egg clutches hinder experimental designs), historical focus males research. Although there gap literature concerning interest ecology group grown recent years. paper, we (1) review existing studies anole plasticity; (2) highlight areas that are currently understudied discuss can contribute broader topics maternal global change biology); (3) guidelines studying field. Overall, provides foundation establishing anoles models plasticity.

Язык: Английский

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Embryonic and juvenile snakes (Natrix maura, Linnaeus 1758) compensate for high elevation hypoxia via shifts in cardiovascular physiology and metabolism

Journal of Experimental Zoology Part A Ecological and Integrative Physiology, Год журнала: 2023, Номер 339(10), С. 1102 - 1115

Опубликована: Сен. 18, 2023

The colonization of novel environments requires a favorable response to conditions never, or rarely, encountered in recent evolutionary history. For example, populations colonizing upslope habitats must cope with lower atmospheric pressure at elevation, and thus reduced oxygen availability. embryo stage oviparous organisms is particularly susceptible, given its lack mobility limited gas exchange via diffusion through the eggshell membranes. Especially little known about responses Lepidosaurian reptiles To test role physiological plasticity during early development high elevation hypoxia, we performed transplant experiment viperine snake (Natrix maura, Linnaeus 1758). We maintained gravid females originating from low (432 m above sea level [ASL]-normoxia) both origin (2877 ASL-extreme hypoxia; approximately 72% availability relative level), then incubated egg clutches elevation. Regardless maternal exposure hypoxia gestation, embryos extreme exhibited altered developmental trajectories cardiovascular function metabolism across incubation period, including reduction late-development mass. This may have contributed maintenance similar duration, hatching success, hatchling body size compared Nevertheless, after being juveniles exhibit carbon dioxide production consumption, suggesting energy pathways normoxia. These findings highlight maintaining rates survival fitness-relevant phenotypes environments.

Язык: Английский

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Climate Change and Dispersal Ability Jointly Affects the Future Distribution of Crocodile Lizards

Animals, Год журнала: 2022, Номер 12(20), С. 2731 - 2731

Опубликована: Окт. 11, 2022

Crocodile lizards (Shinisaurus crocodilurus) are an endangered, 'living fossil' reptile from a monophyletic family and therefore, high priority for conservation. We constructed climatic models to evaluate the potential impact of climate change on distribution crocodile period 2000 2100 determined key environmental factors that affect dispersal this endangered species. For construction models, we used 985 presence-only data points 6 predictor variables which showed excellent performance (AUC = 0.974). The three top-ranked predicting lizard were precipitation wettest month (bio13, 37.1%), coldest quarter (bio19, 17.9%), temperature seasonality (bio4, 14.3%). were, just as they now, widely distributed in north Guangdong Province China Quảng Ninh Vietnam at last glacial maximum (LGM). Since LGM, there has been increase suitable habitats, particularly east-central Guangxi Province, China. Under future global warming scenarios, habitat is expected decrease significantly next 100 years. most optimistic scenario, only 7.35% 6.54% will remain, under worst 8.34% 0.86% remain. Models no limited all would lose temperatures increase. Our work contributes increased understanding current spatial species, supporting practical management conservation plans.

Язык: Английский

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Effects of incubation temperature on development, morphology, and thermal physiology of the emerging Neotropical lizard model organism Tropidurus torquatus

Scientific Reports, Год журнала: 2022, Номер 12(1)

Опубликована: Окт. 13, 2022

Abstract Incubation temperature is among the main phenotypic trait variation drivers studied since developmental trajectory of oviparous animals directly affected by environmental conditions. In last decades, global warming predictions have aroused interest in understanding its impacts on biodiversity. It predicted that effects direct will be exacerbated other anthropogenic factors, such as microclimatic edge effects. Although Brazilian Cerrado biome one most these issues, little known about aforementioned Therefore, aim our study to investigate influence incubation parameters, morphology and thermal physiology traits collared lizard ( Tropidurus torquatus ). Furthermore, we discuss findings regarding biology climate change paradigm. incubated T. eggs under five regimes ranging from artificial nest (28.7 °C) 35.0 °C. We found elevated temperatures affect several investigated traits: egg mass gain positively affected, without any newborn mass; period broadly reduced with increase; survival rate negatively temperature, constant °C regime confirmed a lethal sex ratio at 30.0 °C, prevailing outbreak females. Increased also affects body head size but has no effect limb size. Newborn thermoregulation critical maximum (CT max ) are not temperature. On hand, basal (T bb minimum min were affected. Thermal was age, newborns differing adults for all analyzed traits. Our indicate future modifications nesting sites caused may features development, morphology, this species. Laboratory experiments pointed possible drastic rates, affecting aspects natural history population distribution. Moreover, addition being more vulnerable than predation feeding, physiological

Язык: Английский

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A novel and high‐throughput approach to assess photosynthetic thermal tolerance of kelp using chlorophyll α fluorometry

Journal of Phycology, Год журнала: 2022, Номер 59(1), С. 179 - 192

Опубликована: Ноя. 8, 2022

Foundation seaweed species are experiencing widespread declines and localized extinctions due to increased instability of sea surface temperature. Characterizing temperature thresholds useful for predicting patterns change identifying most vulnerable extremes. Existing methods characterizing thermal tolerance produce diverse metrics often time‐consuming, making comparisons between techniques difficult, hindering insight into global change. Using three kelp species, we adapted a high‐throughput method – previously used in terrestrial plant biology use on kelps. This employs temperature‐dependent fluorescence ( T F 0 ) curves under heating or cooling regimes determine the critical crit photosystem II (PSII), i.e., breakpoint slow fast rise response changing temperature, enabling rapid assays photosynthetic using standardized metric. enables characterization up 48 samples per two‐hour assay, demonstrating capacity tolerance. Temperature‐dependent their derived metric, , may offer timely powerful new field phycology, comparison seaweeds across many populations, biomes.

Язык: Английский

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Rapid heat hardening in embryos of the lizard Anolis sagrei

Biology Letters, Год журнала: 2023, Номер 19(7)

Опубликована: Июль 1, 2023

Adaptive thermal tolerance plasticity can dampen the negative effects of warming. However, our knowledge is lacking for embryonic stages that are relatively immobile and may benefit most from an adaptive plastic response. We tested heat hardening capacity (a rapid increase in manifests minutes to hours) embryos lizard

Язык: Английский

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