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They like it cold, but only in winter: Climate‐mediated effects on a hibernator
Functional Ecology ( IF 4.6 ) Pub Date : 2020-07-12 , DOI: 10.1111/1365-2435.13630 Joanna Fietz 1 , Franz Langer 1 , Wolfgang Schlund 2
中文翻译：
他们喜欢寒冷，但仅在冬天：气候介导的冬眠者效应
更新日期：2020-07-12
Functional Ecology ( IF 4.6 ) Pub Date : 2020-07-12 , DOI: 10.1111/1365-2435.13630 Joanna Fietz 1 , Franz Langer 1 , Wolfgang Schlund 2
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- Variations in ambient temperature (Ta) profoundly influence energy consumption in endotherms and therefore their survival and fitness. But depending on whether endotherms are hibernating or active, the same changes in Ta may have opposing consequences for their energy consumption.
- The aim of this study was therefore to investigate how variations in Ta, occurring during hibernation and during the active period of a hibernator, affect different fitness relevant traits.
- To understand whether changes in Ta impact phenology, body mass and reproduction in a small mammalian hibernator, we analysed Ta variations and detailed capture–mark–recapture data on edible dormice Glis glis collected between 1993 and 2016 in South‐West Germany.
- Results revealed that during hibernation a Ta increase of 1°C advanced the date of first capture after hibernation by 6 days, but only if food availability during the preceding year was low. In contrast, after years of comparatively high food availability, date of first capture was not affected by Ta, but dormice had a significantly lower body mass after emergence, if Ta during hibernation was elevated (3–6 g per 1°C). We presume that an earlier emergence as well as a lower body mass after emergence potentially reduces the chance to survive.
- During the active period of edible dormice, mean spring Ta did not affect the date of birth but was positively associated with litter size, potentially improving reproductive success.
- Results of this study highlight that, depending on the physiological state of a hibernator, an increase in Ta can have positive and negative effects on fitness relevant traits.
中文翻译：
他们喜欢寒冷，但仅在冬天：气候介导的冬眠者效应
- 环境温度（T a）的变化会深刻影响吸热过程中的能量消耗，从而影响其生存和适应性。但是，取决于吸热是冬眠还是活跃，T a的相同变化可能对其能量消耗产生相反的影响。
- 因此，本研究的目的是调查在冬眠期间和冬眠者活跃期间发生的T a变化如何影响与健身相关的不同性状。
- 为了了解T的变化是否会影响小型哺乳动物冬眠者的物候，体重和繁殖，我们分析了1993年至2016年在德国西南部收集的食用休眠格里斯glis的T a变异和详细的捕获-标记-捕获数据。
- 结果表明，在休眠期间一个Ť一个1℃增加先进的休眠后第一捕获的日期由6天，但只有当在前一年过程中的食品的可用性是低的。相比之下，经过多年的较高食物供应量，第一次捕获的日期不受T a的影响，但是如果冬眠期间的T a升高（每1°C 3–6 g），则休眠后的体重明显降低。。我们认为，较早出现以及出现后体重减轻可能会降低生存机会。
- 在可食用的休眠期期间，平均春季T a不会影响出生日期，但与窝产仔数呈正相关，可能会提高繁殖成功率。
- 这项研究的结果强调，取决于冬眠者的生理状态，T a的增加可能对健身相关性状产生正面和负面影响。
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