高度北方蝙蝠 (Eptesicus nilssonii) 显示了它们对高温和低温环境的适应
Rune Sørås1, Mari Aas Fjelldal1, Claus Bech1
1Department of Biology, Norwegian University of Science and Technology, Trondheim NO-7491, Norway.
The Journal of experimental biology
|October 10, 2023
概括
北方蝙蝠,就像最北部的Eptesicus nilssonii一样,可以在低温下冬眠,从而限制能量消耗. 这种温度一致性有助于它们在漫长的冬季中生存,并适应不断变化的气候.
科学领域:
- 动物学 动物学
- 生理学 生理学 生理学
- 生态生态学 生态生态学
背景情况:
- 在北度的食虫蝙蝠面临着长期的食物短缺.
- 居民蝙蝠需要长时间的冬眠,由于白天的长时间,它们的食时间有限.
- 北方蝙蝠物种Eptesicus nilssonii在环境温度降低猎物的可用性时进行冬眠.
研究的目的:
- 研究Eptesicus nilssonii在不同环境温度的正常热量过程中的能源消耗.
- 确定Eptesicus nilssonii如何在沉睡期间限制能源消耗.
- 评估物种应对低温和高温环境的能力.
主要方法:
- 在不同的环境温度下测量Eptesicus nilssonii的能量消耗 (Ta).
- 评估的新陈代谢速率和二氧化碳生产在的过程中.
- 确定了该物种的下临界温度 (Tlc).
主要成果:
- 在Ta低至1.1°C时,Eptesicus nilssonii在不增加代谢率的情况下保持了.
- 鉴定出较低的临界温度 (Tlc) 为27.8°C,低于许多其他类蝙蝠的临界温度.
- 没有观察到高达37.1°C的Ta的代谢反应,而超过Tlc的CO2产量增加.
结论:
- 在接近结的温度下,Eptesicus nilssonii表现出热相符性,使长时间的昏迷和减少能源消耗成为可能.
- 这种物种还可以在所中容忍高环境温度.
- 这些生理适应可能有助于在气候变化中生存.
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