干旱区生态环境知识资源中心(Arid): Heat tolerance limits of Mediterranean songbirds and their current and future vulnerabilities to temperature extremes

Arid

DOI	10.1242/jeb.244848
	Heat tolerance limits of Mediterranean songbirds and their current and future vulnerabilities to temperature extremes
	Cabello-Vergel, Julian; Gonzalez-Medina, Erick; Parejo, Manuel; Abad-Gomez, Jose M.; Playa-Montmany, Nuria; Paton, Daniel; Sanchez-Guzman, Juan M.; Masero, Jose A.; Gutierrez, Jorge S.; Villegas, Auxiliadora
通讯作者	Cabello-Vergel, J
来源期刊	JOURNAL OF EXPERIMENTAL BIOLOGY
ISSN	0022-0949
EISSN	1477-9145
出版年	2022
卷号	225 期号:23
英文摘要	Songbirds are one of the groups most vulnerable to extreme heat events. Although several recent studies have assessed their physiological responses to heat, most of them have focused solely on arid-zone species. We investigated thermoregulatory responses to heat in eight small-sized songbirds occurring in the Mediterranean Basin, where heatwaves are becoming more frequent and intense. Specifically, we determined their heat tolerance limits (HTLs) and evaporative cooling efficiency, and evaluated their current and future vulnerabilities to heat in southwestern Iberia, a Mediterranean climate warming hotspot. To do this, we exposed birds to an increasing profile of air temperatures (T-a) and measured resting metabolic rate (RMR), evaporative water loss (EWL), evaporative cooling efficiency (the ratio between evaporative heat loss and metabolic heat production) and body temperature (T-b). HTL ranged between 40 and 46 degrees C across species, and all species showed rapid increases in RMR, EWL and T-b in response to increasing T-a. However, only the crested lark (Galerida cristata) achieved an evaporative cooling efficiency greater than 1. The studied songbirds currently experience summer T-a maxima that surpass the upper critical temperatures of their thermoneutral zone and even their HTL. Our estimates indicate that five of the eight species will experience moderate risk of lethal dehydration by the end of the century. We argue that the limited heat tolerance and evaporative cooling efficiency of small-sized Mediterranean songbirds make them particularly vulnerable to heatwaves, which will be exacerbated under future climate change scenarios.
英文关键词	Climate warming Heat stress Heatwaves Passerines Thermal physiology Thermoregulatory traits
类型	Article
语种	英语
开放获取类型	hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:000924133300012
WOS关键词	CLIMATE-CHANGE ; AVIAN THERMOREGULATION ; WATER ; HYPERTHERMIA ; PROJECTIONS ; EVENTS ; IMPACT ; COSTS
WOS类目	Biology ; Zoology
WOS研究方向	Life Sciences & Biomedicine - Other Topics ; Zoology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393428
推荐引用方式 GB/T 7714	Cabello-Vergel, Julian,Gonzalez-Medina, Erick,Parejo, Manuel,et al. Heat tolerance limits of Mediterranean songbirds and their current and future vulnerabilities to temperature extremes[J],2022,225(23).
APA	Cabello-Vergel, Julian.,Gonzalez-Medina, Erick.,Parejo, Manuel.,Abad-Gomez, Jose M..,Playa-Montmany, Nuria.,...&Villegas, Auxiliadora.(2022).Heat tolerance limits of Mediterranean songbirds and their current and future vulnerabilities to temperature extremes.JOURNAL OF EXPERIMENTAL BIOLOGY,225(23).
MLA	Cabello-Vergel, Julian,et al."Heat tolerance limits of Mediterranean songbirds and their current and future vulnerabilities to temperature extremes".JOURNAL OF EXPERIMENTAL BIOLOGY 225.23(2022).