Vulnerability of amphibians to global warming

Nature, Год журнала: 2025, Номер unknown

Опубликована: Март 5, 2025

Amphibians are the most threatened vertebrates, yet their resilience to rising temperatures remains poorly understood1,2. This is primarily because knowledge of thermal tolerance taxonomically and geographically biased3, compromising global climate vulnerability assessments. Here we used a phylogenetically informed data-imputation approach predict heat 60% amphibian species assessed daily temperature variations in refugia. We found that 104 out 5,203 (2%) currently exposed overheating events shaded terrestrial conditions. Despite accounting for heat-tolerance plasticity, 4 °C increase would create step change impact severity, pushing 7.5% beyond physiological limits. In Southern Hemisphere, tropical encounter disproportionally more events, while non-tropical susceptible Northern Hemisphere. These findings challenge evidence general latitudinal gradient risk4-6 underscore importance considering climatic variability provide conservative estimates assuming access cool microenvironments. Thus, impacts warming will probably exceed our projections. Our microclimate-explicit analyses demonstrate vegetation water bodies critical buffering amphibians during waves. Immediate action needed preserve manage these microhabitat features.

Язык: Английский

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Trade‐offs between baseline thermal tolerance and thermal tolerance plasticity are much less common than it appears

Global Change Biology, Год журнала: 2023, Номер 29(13), С. 3519 - 3524

Опубликована: Апрель 19, 2023

Thermal tolerance plasticity is a core mechanism by which organisms can mitigate the effects of climate change. As result, there need to understand how variation in arises. The baseline tolerance/plasticity trade-off hypothesis (hereafter referred as hypothesis, TOH) has recently emerged potentially powerful explanation. TOH posits that with high thermal have reduced relative those low tolerance. Many studies found support for TOH. However, this must be regarded cautiously because most common means testing yield spurious "trade-offs" due regression mean. I acquired data 25 previously published analyses supported at intraspecific level and reanalyzed them after applying method adjusts estimates Only six remained statistically significant adjustment, effect size variance explained decreased all cases. few sets was maintained adjustment point areas future study, but are too make generalizations point. In sum, mean led substantial overestimation accounted tests hypothesis.

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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Micromanagement: conditions influencing antipathogen function of the skin microbiome in spotted salamanders, Ambystoma maculatum

Frontiers in Amphibian and Reptile Science, Год журнала: 2024, Номер 2

Опубликована: Окт. 22, 2024

The emerging fungal pathogen Batrachochytrium salamandrivorans ( Bsal ) threatens the diversity of amphibians, particularly in North America where it is projected to invade. Amphibian skin defenses include a mucosal layer containing microorganisms that can potentially modulate host response pathogens such as . In this study, we focused on composition microbiome across life stages spotted salamanders Ambystoma maculatum ). We also evaluated stress hormone corticosterone and inoculations with probiotics at both larval juvenile developmental stages, different environmental conditions. Results indicated bacterial communities found significantly differed structure between A. Exposure three Bacillus thuringiensis , Chryseobacterium rhizoplanae Penicillium sp.) evoked shifts larvae juveniles, metabolite profile Despite changes microbiome, all tested were unable persist skin. Larval microbiomes shifted B. no significant impacts antifungal function or bacteria richness, however fungi strongly responded application. This indicates be initiated by microbial applications widely used mosquito larvicide. Overall, experimental results indicate stage, growth development, conditions appeared main factors driving amphibian potential anti- function.

Язык: Английский

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Trade-offs between baseline thermal tolerance and thermal tolerance plasticity are much less common than it appears

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2022, Номер unknown

Опубликована: Дек. 2, 2022

Abstract Thermal tolerance plasticity is a core mechanism by which organisms can mitigate the effects of climate change. As result, there need to understand how variation in arises. The Baseline Tolerance/Plasticity Trade-off Hypothesis (hereafter referred as Hypothesis, TOH) has recently emerged potentially powerful explanation. TOH posits that with high baseline thermal have reduced relative those low tolerance. Many studies found support for TOH. However, this must be regarded cautiously because most common means testing yield spurious ‘trade-offs’ due regression mean. I acquired data 25 previously-published analyses supported at intraspecific level and reanalyzed them after applying method adjusts estimates Only six remained statistically significant adjustment, effect size variance explained decreased all cases. few sets was maintained adjustment point areas future study, but are too make generalizations point. In sum, mean led substantial overestimation accounted tests hypothesis.

Язык: Английский

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Ranavirus infection does not reduce heat tolerance in a larval amphibian

Journal of Thermal Biology, Год журнала: 2023, Номер 114, С. 103584 - 103584

Опубликована: Май 1, 2023

Язык: Английский

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