Tropical bats counter heat by combining torpor with adaptive hyperthermia
Tropical bats counter heat by combining torpor with adaptive hyperthermia
复制标题
热带蝙蝠通过将麻木状态与适应性高温相结合来对抗热量
DOI:
10.1098/rspb.2020.2059
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Dausmann KH
中科院分区:
文献类型:
--
作者:
Reher S ;Dausmann KH
Many tropical mammals are vulnerable to heat because their water budget limits the use of evaporative cooling for heat compensation. Further increasing temperatures and aridity might consequently exceed their thermoregulatory capacities. Here, we describe two novel modes of torpor, a response usually associated with cold or resource bottlenecks, as efficient mechanisms to counter heat. We conducted a field study on the Malagasy batMacronycteris commersoniresting in foliage during the hot season, unprotected from environmental extremes. On warm days, the bats alternated between remarkably short micro-torpor bouts and normal resting metabolism within a few minutes. On hot days, the bats extended their torpor bouts over the hottest time of the day while tolerating body temperatures up to 42.9°C. Adaptive hyperthermia combined with lowered metabolic heat production from torpor allows higher heat storage from the environment, negates the need for evaporative cooling and thus increases heat tolerance. However, it is a high-risk response as the torpid bats cannot defend body temperature if ambient temperature increases above a critical/lethal threshold. Torpor coupled with hyperthermia and micro-torpor bouts broaden our understanding of the basic principles of thermal physiology and demonstrate how mammals can perform near their upper thermal limits in an increasingly warmer world.
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影响因子:
--
作者:
C. F. Herreid;K. Schmidt‐Nielsen
通讯作者:
K. Schmidt‐Nielsen
DOI:
10.1007/s00360-018-1171-4
发表时间:
2018
期刊:
Journal of Comparative Physiology B
影响因子:
--
作者:
Reher S;Ehlers J;Rabarison H ;Dausmann KH
通讯作者:
Dausmann KH
影响因子:
2.8
作者:
James M. Turner
通讯作者:
James M. Turner
DOI:
10.1007/s00360-011-0609-8
发表时间:
2011
期刊:
Journal of Comparative Physiology B
影响因子:
--
作者:
Nicole M. Weissenböck;W. Arnold;T. Ruf
通讯作者:
T. Ruf
影响因子:
1.4
作者:
P. Kappeler;C. Fichtel
通讯作者:
C. Fichtel