干旱区生态环境知识资源中心(Arid): Environmental determinants of total evaporative water loss in birds at multiple temperatures

Arid

DOI	10.1093/auk/ukz069
	Environmental determinants of total evaporative water loss in birds at multiple temperatures
	Song, Soorim 1; Beissinger, Steven R.1,2
通讯作者	Beissinger, Steven R.
来源期刊	AUK
EISSN	1938-4254
出版年	2020
卷号	137 期号:1
英文摘要	Endotherms dissipate heat to the environment to maintain a stable body temperature at high ambient temperatures, which requires them to maintain a balance between heat dissipation and water conservation. Birds are relatively small, contain a large amount of metabolically expensive tissue, and are mostly diurnal, making them susceptible to physiological challenges related to water balance and heat dissipation. We compiled total evaporative water loss (TEWL) measurements for 174 species of birds exposed to different temperatures and used comparative methods to examine their relationships with body size, ambient temperature, precipitation, diet, and diel activity cycle. TEWL in the thermoneutral zone (TNZ) was associated primarily with body mass and activity phase. Larger and more active-phase birds, with their higher metabolic rates, lost more water through evaporation than smaller, resting-phase birds, particularly at higher thermal exposures. However, maximum temperature of the natural habitat became an important determinant of TEWL when birds were exposed to temperatures exceeding the TNZ. Species from hotter climates exhibited higher TEWL. Adaptation to arid climates did not restrict evaporative water loss at thermal conditions within the TNZ, but promoted evaporative water loss at exposures above the TNZ. The TEWL of granivores, which ingest food with low water content, differed little from species with other food habitats under all thermal conditions. The effects of environmental covariates of TEWL were dissimilar across thermal exposures, suggesting no evidence for a tradeoff between water conservation in the TNZ and heat dissipation at exposure to higher temperatures. Thus, birds may be able to acclimate when climate change results in the need to increase heat dissipation due to warming, except perhaps in hot, arid environments where species will need to depend heavily upon evaporative cooling to maintain homeothermy.
英文关键词	birds evaporative water loss heat dissipation thermoregulation
类型	Article
语种	英语
国家	USA
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000535192600010
WOS关键词	AVIAN THERMOREGULATION ; COOLING CAPACITY ; THERMAL ENERGETICS ; GRANIVOROUS BIRDS ; HEAT TOLERANCE ; METABOLIC-RATE ; DESERT BIRDS ; ECONOMY ; POPULATIONS ; PATTERNS
WOS类目	Ornithology
WOS研究方向	Zoology
来源机构	University of California, Berkeley
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318828
作者单位	1.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA; 2.Univ Calif Berkeley, Museum Vertebrate Zool, Berkeley, CA 94720 USA
推荐引用方式 GB/T 7714	Song, Soorim,Beissinger, Steven R.. Environmental determinants of total evaporative water loss in birds at multiple temperatures[J]. University of California, Berkeley,2020,137(1).
APA	Song, Soorim,&Beissinger, Steven R..(2020).Environmental determinants of total evaporative water loss in birds at multiple temperatures.AUK,137(1).
MLA	Song, Soorim,et al."Environmental determinants of total evaporative water loss in birds at multiple temperatures".AUK 137.1(2020).