Climate Change Data Portal
| DOI | 10.1002/ece3.11316 |
| High-resolution climate data reveal an increasing risk of warming-driven activity restriction for diurnal and nocturnal lizards | |
| 发表日期 | 2024 |
| ISSN | 2045-7758 |
| 起始页码 | 14 |
| 结束页码 | 5 |
| 卷号 | 14期号:5 |
| 英文摘要 | Widespread species experience a variety of climates across their distribution, which can structure their thermal tolerance, and ultimately, responses to climate change. For ectotherms, activity is highly dependent on temperature, its variability and availability of favourable microclimates. Thermal exposure and tolerance may be structured by the availability and heterogeneity of microclimates for species living along temperature and/or precipitation gradients - but patterns and mechanisms underlying such gradients are poorly understood. We measured critical thermal limits (CTmax and CTmin) for five populations of two sympatric lizard species, a nocturnal gecko (Chondrodactylus bibronii) and a diurnal skink (Trachylepis variegata) and recorded hourly thermal variation for a year in three types of microclimate relevant to the activity of lizards (crevice, full sun and partial shade) for six sites across a precipitation gradient. Using a combination of physiological and modelling approaches, we derived warming tolerance for the present and the end of the century. In the present climate, we found an overall wider thermal tolerance for the nocturnal species relative to the diurnal species, and no variation in CTmax but variable CTmin along the precipitation gradient for both species. However, warming tolerances varied significantly over the course of the day, across months and microhabitats. The diurnal skink was most restricted in its daily activity in the three driest sites with up to six daily hours of restricted activity in the open (i.e. outside refugia) during the summer months, while the impacts for the nocturnal gecko were less severe, due to its higher CTmax and night activity. With climate change, lizards will experience more months where activity is restricted and increased exposure to high temperatures even within the more sheltered microhabitats. Together our results highlight the importance of considering the relevant spatiotemporal scale and habitat for understanding the thermal exposure of diurnal and nocturnal species. We sampled a diurnal lizard (Trachylepis variegata) and a nocturnal lizard (Chondrodactylus bibronii) across a diverse climatic gradient in South Africa and measured thermal tolerance and operative temperature data for multiple microhabitats. We found that the diurnal lizard had the most restricted hours of activity during the summer while the nocturnal species was less restricted (being active at night) and exhibited a higher CTmax. However, under modelled warming scenarios, both species had increased times of restriction, even in sheltered microclimates highlighting the importance of considering multiple temporal and spatial scales in understanding ectotherm vulnerability to warming.image |
| 英文关键词 | activity patterns; climate change; ectotherms; hours of restriction; intraspecific variation; thermal exposure; warming tolerance |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology ; Evolutionary Biology |
| WOS类目 | Ecology ; Evolutionary Biology |
| WOS记录号 | WOS:001211310700001 |
| 来源期刊 | ECOLOGY AND EVOLUTION
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/288550 |
| 作者单位 | University of Hong Kong; University of Toronto; University Toronto Scarborough; Stellenbosch University |
| 推荐引用方式 GB/T 7714 | . High-resolution climate data reveal an increasing risk of warming-driven activity restriction for diurnal and nocturnal lizards[J],2024,14(5). |
| APA | (2024).High-resolution climate data reveal an increasing risk of warming-driven activity restriction for diurnal and nocturnal lizards.ECOLOGY AND EVOLUTION,14(5). |
| MLA | "High-resolution climate data reveal an increasing risk of warming-driven activity restriction for diurnal and nocturnal lizards".ECOLOGY AND EVOLUTION 14.5(2024). |
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