干旱区生态环境知识资源中心(Arid): Direct and indirect effects of carrion subsidies in an arid rangeland: Carrion has positive effects on facultative scavengers and negative effects on a small songbird

Arid

DOI	10.1016/j.jaridenv.2020.104174
	Direct and indirect effects of carrion subsidies in an arid rangeland: Carrion has positive effects on facultative scavengers and negative effects on a small songbird
	Rees, James D.; Crowther, Mathew S.; Kingsford, Richard T.; Letnic, Mike
通讯作者	Rees, JD
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2020
卷号	179
英文摘要	In the absence of top-down regulation by predators, herbivore populations irrupt. In irrupting populations of large herbivores deaths are frequent and availability of carrion from carcasses is high, potentially subsidising facultative scavengers such as crows and ravens. Increases in facultative scavengers could amplify perceived and real predation risk for small prey. We provisioned large-herbivore carcasses over 2 weeks at three sites (400 ha/site) in the Australian arid zone and monitored detection rates of facultative scavenger birds and low-nesting small passerines at these sites and at three control sites of the same size. We found that provisioning large herbivore carcasses rapidly increased local abundances of scavenging corvids Corvus coronoides and C. bennetti by 50% and decreased relative detection rates of a predation-sensitive small passerine, white-winged fairywren Malurus leucopterus by 50%. White-winged fairywren detection rates were inversely correlated with corvid abundances. Our study indicates that increases in carrion availability associated with herbivore irruptions subsidise facultative scavengers, and thus may indirectly affect co-occurring prey species.
英文关键词	Resource subsidy Spill-over effects Herbivore irruption Carrion Corvid
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000533505000002
WOS关键词	FAIRY-WREN ; EXPLOITATION ECOSYSTEMS ; POPULATION-DYNAMICS ; LARGE HERBIVORES ; PREDATOR ; CONSERVATION ; BIRDS ; YELLOWSTONE ; AUSTRALIA ; KANGAROOS
WOS类目	Ecology ; Environmental Sciences
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/2XILL650/324464
作者单位	[Rees, James D.; Kingsford, Richard T.; Letnic, Mike] Univ New South Wales, Ctr Ecosyst Sci, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia; [Crowther, Mathew S.] Univ Sydney, Sch Biol Sci, Sydney, NSW 2006, Australia
推荐引用方式 GB/T 7714	Rees, James D.,Crowther, Mathew S.,Kingsford, Richard T.,et al. Direct and indirect effects of carrion subsidies in an arid rangeland: Carrion has positive effects on facultative scavengers and negative effects on a small songbird[J],2020,179.
APA	Rees, James D.,Crowther, Mathew S.,Kingsford, Richard T.,&Letnic, Mike.(2020).Direct and indirect effects of carrion subsidies in an arid rangeland: Carrion has positive effects on facultative scavengers and negative effects on a small songbird.JOURNAL OF ARID ENVIRONMENTS,179.
MLA	Rees, James D.,et al."Direct and indirect effects of carrion subsidies in an arid rangeland: Carrion has positive effects on facultative scavengers and negative effects on a small songbird".JOURNAL OF ARID ENVIRONMENTS 179(2020).