Analysis of resting status reveals distinct elevational variation in metabolisms of lizards

IF 4.4 2区 环境科学与生态学 Q1 ECOLOGY
Ecology Pub Date : 2024-09-10 DOI:10.1002/ecy.4414
Zhong-Wen Jiang, Liang Ma, Shi-ang Tao, Cheng Wenda, Chuyu Cheng, Dan-yang Wu, Wei-Guo Du
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Abstract

Animals spend a considerable proportion of their life span at rest. However, resting status has often been overlooked when investigating how species respond to environmental conditions. This may induce a large bias in understanding the local adaptation of species across environmental gradients and their vulnerability to potential environmental change. Here, we conducted an empirical study on montane agamid lizards, combined with mechanistic modeling, to compare elevational variations in body temperature and metabolisms (cumulative digestion and maintenance cost) between resting and active status. Our study on three populations of an agamid lizard along an elevational gradient revealed a trend of decreasing body temperature toward higher elevations, the main contributor of which was resting status of the lizards. Using population-specific reaction norms, we predicted greater elevational variation in hourly and cumulative digestion for resting lizards than for active lizards. Climate-change impacts, estimated as the change in cumulative digestion, also show greater elevational variation when resting status is factored into the analysis. Further, our global analysis of 98 agamid species revealed that in about half of their combined distributional range, the contribution of resting status in determining the elevational variation in cumulative digestion and maintenance cost of lizards was greater than the contribution made by a lizard's active status. Our study highlights the importance of considering resting status when investigating how species respond to environmental conditions, especially for those distributed over tropical and subtropical mountain areas.

对休息状态的分析表明,蜥蜴的新陈代谢存在明显的海拔差异。
动物一生中有相当一部分时间是在休息中度过的。然而,在研究物种如何应对环境条件时,静止状态往往被忽视。这可能会在理解物种对环境梯度的局部适应性及其对潜在环境变化的脆弱性方面造成很大偏差。在此,我们对山地姬蛙蜥进行了一项实证研究,并结合机理建模,比较了静止状态和活动状态下体温和新陈代谢(累积消化和维持成本)的海拔变化。我们对沿海拔梯度分布的三个姬蛙蜥种群进行的研究表明,体温呈向海拔越高越低的趋势,其主要原因是蜥蜴处于静止状态。利用种群特异性反应标准,我们预测休息状态蜥蜴的每小时消化率和累积消化率在海拔高度上的变化要大于活动状态蜥蜴。气候变化的影响是以累积消化率的变化来估算的,在分析中考虑到休息状态时,这种影响也显示出更大的升高变化。此外,我们对98种沼泽物种的全球分析表明,在大约一半的沼泽物种分布区内,休眠状态在决定蜥蜴累积消化率和维持成本的海拔变化方面所起的作用大于蜥蜴活动状态所起的作用。我们的研究强调了在研究物种如何应对环境条件时考虑休息状态的重要性,特别是对于分布在热带和亚热带山区的物种。
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来源期刊
Ecology
Ecology 环境科学-生态学
CiteScore
8.30
自引率
2.10%
发文量
332
审稿时长
3 months
期刊介绍: Ecology publishes articles that report on the basic elements of ecological research. Emphasis is placed on concise, clear articles documenting important ecological phenomena. The journal publishes a broad array of research that includes a rapidly expanding envelope of subject matter, techniques, approaches, and concepts: paleoecology through present-day phenomena; evolutionary, population, physiological, community, and ecosystem ecology, as well as biogeochemistry; inclusive of descriptive, comparative, experimental, mathematical, statistical, and interdisciplinary approaches.
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