干旱区生态环境知识资源中心(Arid): Daily energy expenditure of Florida Scrub-Jays (Aphelocoma coerulescens) in suburban and wildland landscapes

Arid

DOI	10.1676/1559-4491-132.2.306
	Daily energy expenditure of Florida Scrub-Jays (Aphelocoma coerulescens) in suburban and wildland landscapes
	Ellis, Hugh, I; Bowman, Reed
通讯作者	Ellis, HI (corresponding author), Univ San Diego, Dept Biol, San Diego, CA 92110 USA.
来源期刊	WILSON JOURNAL OF ORNITHOLOGY
ISSN	1559-4491
EISSN	1938-5447
出版年	2020
卷号	132 期号:2 页码:306-316
英文摘要	Urbanization alters ecological systems, disturbance regimes, food webs, and a variety of other processes that can influence local flora and fauna. In birds, most studies have focused on behavioral or demographic responses to altered conditions; however, the physiological mechanisms associated with these responses have been understudied. We have previously documented shifts in foraging behavior because of the availability of human-provided food; we sought to see if this was driven by or associated with a change in field metabolic rates. We measured field metabolic rates (FMR), a measure of daily energy expenditure (DEE), of Florida Scrub-Jays (Aphelocoma coerulescens) in 2 habitats using doubly labeled water (DLW). One population of jays lived in wildland habitat, the other in a suburban area where the habitat was badly degraded. During the breeding season FMR of suburban males exceeded that of wildland males by over 100%. Female FMR did not differ between sites but increased following incubation. In the wildlands, FMRs of females were barely lower than those of males, but in the suburban landscape, female FMRs were much lower than in males. For both sexes in the wildlands, FMRs were about 3.5x basal rates of metabolism (BMR) during breeding; in the suburbs female FMR exceeded BMR by 4x but did not differ from that of wildland females. Suburban male FMRs exceeded BMR by 7.1x. During the nonbreeding seasons of fall and winter, FMR did not differ between habitats, ranging from 1.7x to 2.1x BMR, thus it is the breeding season that separated wildland and suburban jays energetically. In both habitats, a low water economy index (mL/kJ) and low water fluxes indicated that these jays are well adapted to their xeric habitat, but their FMRs distinguished them from desert birds. The very high energetic cost associated with breeding for suburban males may help explain why in the metapopulation of Florida Scrub-Jays, suburban jay populations are sinks. This study underscores the value of physiology in the conservation of listed species.
英文关键词	conservation physiology field metabolic rates landscape changes seasonal effects urbanization water economy
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000617763600007
WOS关键词	FIELD METABOLIC-RATE ; FORAGING BEHAVIOR ; WATER FLUX ; ENERGETICS ; HABITAT ; REQUIREMENTS ; INCUBATION ; IMPACTS ; MAMMALS ; PACE
WOS类目	Ornithology
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/2XILL650/349235
作者单位	[Ellis, Hugh, I] Univ San Diego, Dept Biol, San Diego, CA 92110 USA; [Bowman, Reed] Archbold Biol Stn, Lake Placid, FL USA
推荐引用方式 GB/T 7714	Ellis, Hugh, I,Bowman, Reed. Daily energy expenditure of Florida Scrub-Jays (Aphelocoma coerulescens) in suburban and wildland landscapes[J],2020,132(2):306-316.
APA	Ellis, Hugh, I,&Bowman, Reed.(2020).Daily energy expenditure of Florida Scrub-Jays (Aphelocoma coerulescens) in suburban and wildland landscapes.WILSON JOURNAL OF ORNITHOLOGY,132(2),306-316.
MLA	Ellis, Hugh, I,et al."Daily energy expenditure of Florida Scrub-Jays (Aphelocoma coerulescens) in suburban and wildland landscapes".WILSON JOURNAL OF ORNITHOLOGY 132.2(2020):306-316.