干旱区生态环境知识资源中心(Arid): High temperatures are associated with substantial reductions in breeding success and offspring quality in an arid-zone bird

Arid

DOI	10.1007/s00442-020-04644-6
	High temperatures are associated with substantial reductions in breeding success and offspring quality in an arid-zone bird
	van de Ven, T. M. F. N.1; McKechnie, A. E.2,3; Er, S.4; Cunningham, S. J.1
通讯作者	Cunningham, S. J.
来源期刊	OECOLOGIA
ISSN	0029-8549
EISSN	1432-1939
出版年	2020
卷号	193 期号:1 页码:225-235
英文摘要	During hot weather, terrestrial animals often seek shaded thermal refugia. However, this can result in missed foraging opportunities, loss of body condition and impaired parental care. We investigated whether such costs could compromise breeding success in a widespread southern African bird: the Southern Yellow-Billed Hornbill Tockus leucomelas. We predicted that hornbills might be especially vulnerable to temperature-dependant reductions in parents' foraging capacity due to extreme asymmetry in sex-specific roles during breeding: females are confined within the nest cavity for most of the nesting period and the burden of provisioning falls solely on the male during this time. We followed 50 hornbill nesting attempts in the Kalahari Desert between 2012 and 2015, collecting data on provisioning rates, adult and nestling body mass, fledging success and size of fledglings. Mean daily maximum air temperatures (T-max) during nesting attempts ranged from 33.2 to 39.1 degrees C. The likelihood of successful fledging fell below 50% at mean T-max > 35.1 degrees C; a threshold now regularly exceeded at our study site due to recent climate warming. Additionally, offspring fledging following the hottest nesting attempts were > 50% lighter than those fledging following the coolest. Sublethal costs of keeping cool including loss of body condition, production of poor-quality offspring and breeding failure are likely to become issues of serious conservation concern as climate change progresses; even for currently widespread species. Missed-opportunity costs associated with behavioral thermoregulation and direct sublethal costs of temperature exposure should not be overlooked as a potential threat to populations, especially in environments that are already hot.
英文关键词	Climate change Fitness Offspring quality Provisioning Temperature dependence
类型	Article
语种	英语
国家	South Africa
收录类别	SCI-E
WOS记录号	WOS:000526237800002
WOS关键词	NEST-SITE SELECTION ; CLIMATE-CHANGE ; TREE SWALLOWS ; SURVIVAL ; THERMOREGULATION ; HORNBILLS ; GROWTH ; WORLD ; COST
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315249
作者单位	1.Univ Cape Town, FitzPatrick Inst African Ornithol, DSI NRF Ctr Excellence, Private Bag X3, ZA-7701 Rondebosch, South Africa; 2.Univ Pretoria, Fitzpatrick Inst, DSI NRF Ctr Excellence, Dept Zool & Entomol, ZA-0002 Pretoria, South Africa; 3.South African Natl Biodivers Inst, South African Res Chair Conservat Physiol, Pretoria, South Africa; 4.Univ Cape Town, Dept Stat Sci, ZA-7701 Rondebosch, South Africa
推荐引用方式 GB/T 7714	van de Ven, T. M. F. N.,McKechnie, A. E.,Er, S.,et al. High temperatures are associated with substantial reductions in breeding success and offspring quality in an arid-zone bird[J],2020,193(1):225-235.
APA	van de Ven, T. M. F. N.,McKechnie, A. E.,Er, S.,&Cunningham, S. J..(2020).High temperatures are associated with substantial reductions in breeding success and offspring quality in an arid-zone bird.OECOLOGIA,193(1),225-235.
MLA	van de Ven, T. M. F. N.,et al."High temperatures are associated with substantial reductions in breeding success and offspring quality in an arid-zone bird".OECOLOGIA 193.1(2020):225-235.