干旱区生态环境知识资源中心(Arid): The importance of functional responses among competing predators for avian nesting success

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DOI	10.1111/1365-2435.13460
	The importance of functional responses among competing predators for avian nesting success
	Ellis, Kristen S.1; Larsen, Randy T.2; Koons, David N.3
通讯作者	Ellis, Kristen S.
来源期刊	FUNCTIONAL ECOLOGY
ISSN	0269-8463
EISSN	1365-2435
出版年	2020
卷号	34 期号:1 页码:252-264
英文摘要	The relationship between the rate of predation and prey abundance is an important component of predator-prey dynamics. However, functional responses are less straightforward when multiple predators compete for shared prey. Interactions among competing predators can reduce or enhance effects of predation on prey populations. Because many avian populations experience high rates of nest predation, understanding the role of specific predators on nest mortality will lead to more informed conservation and management strategies which attempt to increase productivity by removing certain predators or managing habitat to limit their impact. Our goal was to evaluate effects of specific predators and the influence of nest abundance on nest mortality. We monitored snowy plover Charadrius nivosus nests across 7 years at two study areas in Utah, USA, with remote cameras. We modelled predator-specific hazard rates for nest mortality in a Bayesian framework to assess relationships between competing predators and the role of nest abundance on predator-specific hazard rates. We found that hazard rates for nest mortality by gulls Larus spp. decreased with increasing nest abundance, whereas nest mortality by foxes Vulpes spp. and ravens Corvus corax initially increased, indicating that dietary switching may occur when nests become more abundant. Nest mortalities of specific predators were often not independent and ranged between compensatory (e.g. mammalian mesopredators) and superadditive (e.g. avian predators) across the breeding season. The non-independence between nest mortalities suggests that reductions in some predators may not translate to additive increases in overall nest success. Analyses of cause-specific mortality are rarely applied to avian nests, but examination of interacting impacts among competing predators on nest survival may provide insight into specific drivers of avian population dynamics. A free Plain Language Summary can be found within the Supporting Information of this article.
英文关键词	cause-specific mortality Charadrius nivosus competing risks hazard rates remote cameras shorebird
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000488545700001
WOS关键词	GREAT-SALT-LAKE ; CAUSE-SPECIFIC MORTALITY ; SNOWY PLOVERS ; KIT FOXES ; MEDIATED INTERACTIONS ; INTRAGUILD PREDATION ; MULTIPLE PREDATORS ; PREY SURVIVAL ; BASIN DESERT ; SAGE-GROUSE
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
来源机构	Colorado State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215850
作者单位	1.Colorado State Univ, Dept Fish Wildlife & Conservat Biol, Ft Collins, CO 80523 USA; 2.Brigham Young Univ, Dept Plant & Wildlife Sci, Provo, UT 84602 USA; 3.Colorado State Univ, Grad Degree Program Ecol, Dept Fish Wildlife & Conservat Biol, Ft Collins, CO 80523 USA
推荐引用方式 GB/T 7714	Ellis, Kristen S.,Larsen, Randy T.,Koons, David N.. The importance of functional responses among competing predators for avian nesting success[J]. Colorado State University,2020,34(1):252-264.
APA	Ellis, Kristen S.,Larsen, Randy T.,&Koons, David N..(2020).The importance of functional responses among competing predators for avian nesting success.FUNCTIONAL ECOLOGY,34(1),252-264.
MLA	Ellis, Kristen S.,et al."The importance of functional responses among competing predators for avian nesting success".FUNCTIONAL ECOLOGY 34.1(2020):252-264.