Shifts in the Thermal Dependence of Locomotor Performance across an Altitudinal Gradient in Native Populations of Xenopus laevis.

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2023-07-01 DOI:10.1086/725237
Laurie Araspin, Carla Wagener, Pablo Padilla, Anthony Herrel, John Measey
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Abstract

AbstractEctothermic species are dependent on temperature, which drives many aspects of their physiology, including locomotion. The distribution of the native populations of Xenopus laevis is characterized by an exceptional range in latitude and altitude. Along altitudinal gradients, thermal environments change, and populations experience different temperatures. In this study, we compared critical thermal limits and thermal performance curves of populations from the native range across an altitudinal gradient to test whether optimal temperatures for exertion differ depending on altitude. Data on exertion capacity were collected at six different temperatures (8°C, 12°C, 16°C, 19°C, 23°C, and 27°C) for four populations spanning an altitudinal gradient (60, 1,016, 1,948, and 3,197 m asl). Results show that the thermal performance optimum differs among populations. Populations from cold environments at high altitudes exhibit a lower optimal performance temperature than populations from warmer environments at lower altitudes. The ability of this species to change its optimal temperature for locomotor exertion across extremely different climatic environments within the native range may help explain its exceptional invasive potential. These results suggest that ectothermic species capable of adapting to broad altitudinal ranges may be particularly good at invading novel climatic areas, given their ability to cope with a wide range of variation in environmental temperatures.

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非洲爪蟾原生种群运动表现的热依赖性在海拔梯度上的变化。
温热物种依赖于温度,温度驱动着它们生理的许多方面,包括运动。非洲爪蟾的本地种群分布具有特殊的纬度和海拔范围。沿着海拔梯度,热环境发生变化,种群经历不同的温度。在这项研究中,我们比较了来自不同海拔梯度的原生种群的临界热极限和热性能曲线,以测试运动的最佳温度是否因海拔而异。在6种不同温度(8°C、12°C、16°C、19°C、23°C和27°C)下,收集了跨越海拔梯度(60、1,016、1,948和3,197 m)的4个种群的运动能力数据。结果表明,不同种群的最佳热工性能存在差异。来自高海拔寒冷环境的种群比来自低海拔温暖环境的种群表现出更低的最佳表现温度。该物种在本土范围内极端不同的气候环境中改变运动运动的最佳温度的能力可能有助于解释其特殊的入侵潜力。这些结果表明,能够适应广泛海拔范围的变温物种可能特别擅长入侵新的气候区域,因为它们有能力应对环境温度的大范围变化。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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