Arid
DOI10.1002/jwmg.818
Landscape Models of Space Use by Desert Bighorn Sheep in the Sonoran Desert of Southwestern Arizona
Hoglander, Cerissa1; Dickson, Brett G.1,2; Rosenstock, Steven S.3; Anderson, Jesse J.1,2
通讯作者Hoglander, Cerissa
来源期刊JOURNAL OF WILDLIFE MANAGEMENT
ISSN0022-541X
EISSN1937-2817
出版年2015
卷号79期号:1页码:77-91
英文摘要

The desert bighorn sheep (Ovis canadensis mexicana) is one of the few ungulates native to North America capable of surviving in harsh desert environments and xeric conditions. However, the effects of an increasingly arid climate on this species and its habitat are unknown. We sought to identify important predictors of desert bighorn sheep diurnal space use to provide new insight into management and conservation opportunities. We evaluated home range size and relative intensity of space use for 41 collared individuals monitored between 2007 and 2010 across a 14,217-km(2) extent of Arizona’s Sonoran Desert, including the Kofa National Wildlife Refuge and the United States Army Yuma Proving Ground. Using linear mixed models and an information-theoretic approach, we developed seasonal models of intensity of space use for the summer (Jun-Aug) and non-summer (Sep-May) seasons. Models included environmental variables representing escape terrain and distance from developed waters, and Normalized Difference Vegetation Index metrics that represented forage and preformed water resources. We found intensity of space use to be greater for females (than for males) in the summer season and smaller home range sizes for both sexes in the summer season. Escape terrain was the dominant predictor of intensity of space use in both seasons, but forage and preformed water resources were strong predictors only in the non-summer season. These results likely reflected a seasonal trade-off between escape terrain (i.e., predator avoidance) and limited forage and water resources, particularly for more risk-averse females. Effective conservation and management strategies for desert bighorn sheep should consider the availability of both quality forage and water resources in areas of escape terrain. Although more research is needed on species-specific vulnerabilities to climate change and drought, our approach to integrating vegetation indices into estimates of space use is highly transferable to analyses of other wide-ranging species occupying dynamic arid environments. (c) 2014 The Wildlife Society.


英文关键词developed waters escape terrain linear mixed models NDVI Ovis canadensis ruggedness Sonoran Desert vegetation
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000346611800010
WOS关键词VEGETATION INDEX NDVI ; OVIS-CANADENSIS-NELSONI ; HABITAT USE ; MOUNTAIN SHEEP ; HOME-RANGE ; PREDATOR AVOIDANCE ; ESCAPE TERRAIN ; CLIMATE-CHANGE ; SURFACE-WATER ; NORTH-AMERICA
WOS类目Ecology ; Zoology
WOS研究方向Environmental Sciences & Ecology ; Zoology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/189063
作者单位1.No Arizona Univ, Lab Landscape Ecol & Conservat Biol, Landscape Conservat Initiat, Flagstaff, AZ 86011 USA;
2.Conservat Sci Partners Inc, Truckee, CA 96161 USA;
3.Arizona Game & Fish Dept, Flagstaff, AZ 86005 USA
推荐引用方式
GB/T 7714
Hoglander, Cerissa,Dickson, Brett G.,Rosenstock, Steven S.,et al. Landscape Models of Space Use by Desert Bighorn Sheep in the Sonoran Desert of Southwestern Arizona[J],2015,79(1):77-91.
APA Hoglander, Cerissa,Dickson, Brett G.,Rosenstock, Steven S.,&Anderson, Jesse J..(2015).Landscape Models of Space Use by Desert Bighorn Sheep in the Sonoran Desert of Southwestern Arizona.JOURNAL OF WILDLIFE MANAGEMENT,79(1),77-91.
MLA Hoglander, Cerissa,et al."Landscape Models of Space Use by Desert Bighorn Sheep in the Sonoran Desert of Southwestern Arizona".JOURNAL OF WILDLIFE MANAGEMENT 79.1(2015):77-91.
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