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| DOI | 10.1093/jmammal/gyae041 |
| Assessing responses to heat in a range-shifting, nocturnal, flying squirrel | |
| 发表日期 | 2024 |
| ISSN | 0022-2372 |
| EISSN | 1545-1542 |
| 英文摘要 | Over the last few decades North American flying squirrels (Glaucomys spp.) have experienced dramatic northward range shifts. Previous studies have focused on the potential effects of warming winter temperatures, yet the hypothesis that rising summer temperature had a role in these range shifts remained unexplored. We therefore sought to determine the effect of high environmental temperatures on the thermoregulation and energetics of flying squirrels in an area of the Northeast of North America with a recent species turnover. Unable to find a logistically feasible population of the northern species (Glaucomys sabrinus), we focused on Southern Flying Squirrels (G. volans). Using flow-through respirometry, we measured the relationship between metabolic rate, evaporative water loss, and body temperature at high ambient temperatures. We also measured core body temperature in free-ranging flying squirrels using temperature-sensitive data loggers. We detected no significant increase in metabolic rate up to ambient temperatures as high as 40 degrees C. However, evaporative water loss increased at temperatures above 36.2 degrees C. Free-ranging body temperature of flying squirrels followed a circadian pattern with a similar to 2 degrees C difference between active and resting phase modal body temperatures. Rest-phase body temperatures were influenced by environmental temperatures with higher resting temperatures observed on days with higher daily maximum ambient temperatures but not to an extent that energy or water costs were significantly increased during rest. We found that, due to a relatively high level of thermal tolerance, high ambient temperatures are unlikely to cause an energetic strain on Southern Flying Squirrels. However, these findings do not preclude negative impacts of high ambient temperatures on the northern species, and these may still play a role in the changing distributions of Glaucomys in North America. |
| 英文关键词 | critical limits; evaporative cooling; flying squirrel; Sciuridae; temperature; thermal profiles; thermal tolerance |
| 语种 | 英语 |
| WOS研究方向 | Zoology |
| WOS类目 | Zoology |
| WOS记录号 | WOS:001220391600001 |
| 来源期刊 | JOURNAL OF MAMMALOGY
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/302222 |
| 作者单位 | University of Maine System; University of Maine Orono; University of Maine System; University of Maine Orono; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park |
| 推荐引用方式 GB/T 7714 | . Assessing responses to heat in a range-shifting, nocturnal, flying squirrel[J],2024. |
| APA | (2024).Assessing responses to heat in a range-shifting, nocturnal, flying squirrel.JOURNAL OF MAMMALOGY. |
| MLA | "Assessing responses to heat in a range-shifting, nocturnal, flying squirrel".JOURNAL OF MAMMALOGY (2024). |
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