干旱区生态环境知识资源中心(Arid): Clutch Size, but Not Egg Volume, Increases with Rainfall in an Arid-Dwelling Bird

Arid

DOI	10.1093/icb/icae063
	Clutch Size, but Not Egg Volume, Increases with Rainfall in an Arid-Dwelling Bird
	Liebl, Andrea L.; Steen, Andrew J.; O'Neill, Louis G.; Savage, James L.; Russell, Andrew F.
通讯作者	Liebl, AL
来源期刊	INTEGRATIVE AND COMPARATIVE BIOLOGY
ISSN	1540-7063
EISSN	1557-7023
出版年	2024
英文摘要	Understanding how animals maximize reproductive success in variable environments is important in determining how populations will respond to increasingly extreme weather events predicted in the face of changing climates. Although temperature is generally considered a key factor in reproductive decisions, rainfall is also an important predictor of prey availability in arid environments. Here, we test the impact of weather (i.e., rainfall and temperature) on female reproductive investment in an arid-dwelling bird (i.e., clutch size and egg volume) and tradeoffs between the two. We predicted that female chestnut-crowned babblers (Pomatostomus ruficeps), endemic to the arid region of Australia, would increase clutch size at the expense of egg volume in response to variation in rainfall and temperature. We found that over 14 breeding seasons, clutch size decreased with increasing temperature, but increased following more rain. Egg volume, on the other hand, became larger as temperatures increased and, although not related to the amount of rain, was related to the number of days since the last rainfall. Finally, egg size decreased as clutch size increased, indicating a tradeoff between the two reproductive parameters. Our results suggest that chestnut-crowned babblers breed reactively in response to variable environments. We expect that clutch size variation in response to rain may reflect the impact of rain on arthropod abundance, whereas the effect of temperature may represent an established decline in clutch size observed in other seasonal breeders. As the tradeoff between clutch size and egg volume was modest and clutch sizes were modified to a greater extent than egg volumes in response to rainfall, we suggest selection is more likely to increase offspring number than quality, at least in favorable years. Our results support the idea that reproductive investment is variable in fluctuating environments, which has implications for species living in habitats experiencing more extreme and less predictable weather as the global climate changes.
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001249735500001
WOS关键词	CHESTNUT-CROWNED BABBLER ; TRADE-OFF ; LIFE-HISTORY ; NATURAL-SELECTION ; CLIMATE-CHANGE ; ENVIRONMENTAL VARIATION ; COOPERATIVE BREEDER ; REPRODUCTIVE EFFORT ; OFFSPRING SIZE ; DARWINS FINCH
WOS类目	Zoology
WOS研究方向	Zoology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404181
推荐引用方式 GB/T 7714	Liebl, Andrea L.,Steen, Andrew J.,O'Neill, Louis G.,et al. Clutch Size, but Not Egg Volume, Increases with Rainfall in an Arid-Dwelling Bird[J],2024.
APA	Liebl, Andrea L.,Steen, Andrew J.,O'Neill, Louis G.,Savage, James L.,&Russell, Andrew F..(2024).Clutch Size, but Not Egg Volume, Increases with Rainfall in an Arid-Dwelling Bird.INTEGRATIVE AND COMPARATIVE BIOLOGY.
MLA	Liebl, Andrea L.,et al."Clutch Size, but Not Egg Volume, Increases with Rainfall in an Arid-Dwelling Bird".INTEGRATIVE AND COMPARATIVE BIOLOGY (2024).