干旱区生态环境知识资源中心(Arid): Climate influences productivity but not breeding density of wedge-tailed eagles Aquila audax in arid and mesic Western Australia

Arid

DOI	10.1111/aec.13106
	Climate influences productivity but not breeding density of wedge-tailed eagles Aquila audax in arid and mesic Western Australia
	Cherriman, Simon C.; Fleming, Patricia A.; Shephard, Jill M.; Olsen, Penny D.
通讯作者	Cherriman, SC (corresponding author), Murdoch Univ, Harry Butler Inst, Ctr Climate Impacted Terr Ecosyst, Murdoch, WA 6150, Australia. ; Cherriman, SC (corresponding author), iNSiGHT Ornithol, Parkerville, WA, Australia.
来源期刊	AUSTRAL ECOLOGY
ISSN	1442-9985
EISSN	1442-9993
出版年	2021-08
英文摘要	Long-term studies are required to reveal responses by long-lived, top-order predator populations to ongoing seasonal fluctuations. However, such investigations are rare in the Australian context. Between 2009 and 2019, the breeding density and productivity of an arid and a mesic wedge-tailed eagle Aquila audax population, each occupying an area of 2800 km(2), were compared (11-98 pairs monitored annually). Breeding pairs spaced themselves evenly in both study areas, with no significant difference between the average arid zone nearest-neighbour distance of 5.32 +/- 1.98 km (n = 44) and that determined for the mesic zone (4.88 +/- 2.32 km, n = 54). This similarity in spacing suggests a maximum average density is tolerated by these territorial raptors. By contrast, annual breeding success (proportion of pairs fledging young) and productivity (fledged young per pair) differed significantly between the two populations, with rainfall (but not temperature) influencing reproduction. In the arid zone, the proportion of successful pairs per occupied breeding home range was consistently low each year (mean = 12 +/- 7% fledged broods per pair, range 0-26%) and positively correlated with annual rainfall. In the mesic zone, it was consistently high each year (mean = 69 +/- 9%, range 57-91%) and not significantly correlated with annual rainfall. Overall productivity figures showed similar differences, with 0.13 and 0.77 fledglings per pair per year for arid (n = 9 years) and mesic (n = 11 years) eagles, respectively. Such low arid zone productivity, the lowest ever recorded for the species, could have long-term implications in the face of the increased frequency of extreme weather events. That breeding density can be independent of climatic factors provides new insight into the way a large Aquila species integrates with Australia's predominantly arid environment. This study provides an important baseline data set for continued research on long-term occupancy and productivity trends.
英文关键词	apex predator breeding density productivity raptor wedge-tailed eagle
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000693252200001
WOS关键词	MIGRATORY GOLDEN EAGLES ; DENALI-NATIONAL-PARK ; NEST-SITE SELECTION ; REPRODUCTIVE SUCCESS ; POPULATION-SIZE ; TRADE-OFF ; CHRYSAETOS ; CONSERVATION ; DIET ; PERFORMANCE
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/2XILL650/362676
作者单位	[Cherriman, Simon C.; Fleming, Patricia A.; Shephard, Jill M.] Murdoch Univ, Harry Butler Inst, Ctr Climate Impacted Terr Ecosyst, Murdoch, WA 6150, Australia; [Cherriman, Simon C.] iNSiGHT Ornithol, Parkerville, WA, Australia; [Olsen, Penny D.] Australian Natl Univ, Div Ecol & Evolut, Acton, ACT, Australia
推荐引用方式 GB/T 7714	Cherriman, Simon C.,Fleming, Patricia A.,Shephard, Jill M.,et al. Climate influences productivity but not breeding density of wedge-tailed eagles Aquila audax in arid and mesic Western Australia[J],2021.
APA	Cherriman, Simon C.,Fleming, Patricia A.,Shephard, Jill M.,&Olsen, Penny D..(2021).Climate influences productivity but not breeding density of wedge-tailed eagles Aquila audax in arid and mesic Western Australia.AUSTRAL ECOLOGY.
MLA	Cherriman, Simon C.,et al."Climate influences productivity but not breeding density of wedge-tailed eagles Aquila audax in arid and mesic Western Australia".AUSTRAL ECOLOGY (2021).