干旱区生态环境知识资源中心(Arid): Extreme drought and adaptive resource selection by a desert mammal

Arid

DOI	10.1002/ecs2.3175
	Extreme drought and adaptive resource selection by a desert mammal
	Gedir, Jay, V; Cain, James W., III; Swetnam, Tyson L.; Krausman, Paul R.; Morgart, John R.
通讯作者	Cain, JW
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2020
卷号	11 期号:7
英文摘要	When animals select areas to occupy, decisions involve trade-offs between the fitness benefits of obtaining critical resources and minimizing costs of biotic and abiotic factors that constrain their use. These processes can be more dynamic and complex for species inhabiting desert environments, where highly variable spatial and temporal distribution of precipitation can create high intra- and inter-annual variability in forage conditions and water availability, and thermal constraints can differ significantly among seasons and diel periods. We examined resource selection in desert bighorn sheep (Ovis canadensis mexicana) in Cabeza Prieta National Wildlife Refuge, Arizona, USA, at multiple spatial and temporal scales to gain insight into how a desert mammal responds to variations in climatic conditions. We used resource selection functions to test topographic, forage, and environmental features among seasons and diel periods, and between non-drought and drought conditions at the population and home-range scale. When precipitation was average, sheep selected for topographic features that were beneficial for predator avoidance (i.e., escape terrain-steep, rugged areas with high visibility) and locations near perennial water. When drought occurred, they ranged further from preferred escape terrain and perennial water, perhaps seeking forage conditions suitable to meet their nutritional requirements. On early (April-June) and late (July-September) summer days, sheep selected for more northerly aspects and locations with lower solar radiation, and in some periods, selection for these cooler areas coincided with periods when forage covariates, proximity to perennial water, and several topographic features were uninformative in resource selection models. These choices may be necessary trade-offs, foregoing good escape terrain and foraging areas, and access to water, for improved thermoregulation. This study highlights the importance of identifying resource selection at variable spatial and temporal scales when investigating the interrelationship between species and their environment. It provides insight into the dynamics of resource selection in desert mammals, and how they respond to constraints imposed on them by their environment. This work can serve to inform strategies for managing and conserving species living in arid environments when faced with climate change.
英文关键词	climate change desert bighorn sheep diel period environment forage habitat use scale topography
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	SCI-E
WOS记录号	WOS:000567408500018
WOS关键词	DEER HABITAT USE ; BIGHORN SHEEP ; MULE DEER ; MOUNTAIN SHEEP ; SEXUAL SEGREGATION ; RESPONSES ; PRECIPITATION ; AVAILABILITY ; STRATEGIES ; REGRESSION
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
来源机构	University of Arizona ; United States Geological Survey ; New Mexico State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326142
作者单位	[Gedir, Jay, V] New Mexico State Univ, Dept Fish Wildlife & Conservat Ecol, Las Cruces, NM 88003 USA; [Cain, James W., III] New Mexico State Univ, US Geol Survey, New Mexico Cooperat Fish & Wildlife Res Unit, Dept Fish Wildlife & Conservat Ecol, Las Cruces, NM 88003 USA; [Swetnam, Tyson L.] Univ Arizona, BIOS Inst, Tucson, AZ 85721 USA; [Krausman, Paul R.] Univ Arizona, Sch Nat Resources, Tucson, AZ 85721 USA; [Morgart, John R.] US Fish & Wildlife Serv, Cabeza Prieta Natl Wildlife Refuge, Ajo, AZ 85321 USA
推荐引用方式 GB/T 7714	Gedir, Jay, V,Cain, James W., III,Swetnam, Tyson L.,et al. Extreme drought and adaptive resource selection by a desert mammal[J]. University of Arizona, United States Geological Survey, New Mexico State University,2020,11(7).
APA	Gedir, Jay, V,Cain, James W., III,Swetnam, Tyson L.,Krausman, Paul R.,&Morgart, John R..(2020).Extreme drought and adaptive resource selection by a desert mammal.ECOSPHERE,11(7).
MLA	Gedir, Jay, V,et al."Extreme drought and adaptive resource selection by a desert mammal".ECOSPHERE 11.7(2020).