Arid
DOI10.1016/j.jaridenv.2011.01.018
Sensitivity to climate change for two reptiles at the Mojave-Sonoran Desert interface
Barrows, C. W.
通讯作者Barrows, C. W.
来源期刊JOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
出版年2011
卷号75期号:7页码:629-635
英文摘要

The high temperatures and extended droughts that characterize habitat for desert-living reptiles may already approach their physiological tolerances and so could put them at risk due to climate change. Here I examined climate change sensitivity for desert tortoises, Gopherus agassizii, and common chuckwallas, Sauromalus ater, two large-bodied reptiles that occur across the Mojave-Sonoran Desert interface. I employed the Mahalanobis D-2 statistic to model their niche spaces and then assessed climate-change sensitivity by altering climate variables along a gradient of increasing temperature and decreasing precipitation. While shifting climate variables, I held terrain and soils variables that otherwise define these species’ preferred habitat constant, providing a more realistic prediction of available niche space. Both reptiles’ modeled niches responded to climate change by shifting to higher elevations and increasingly away from their Sonoran Desert distribution. At moderate predictions of climate change (+2 degrees C, -50 mm precipitation) desert tortoises’ suitable habitat was reduced by nearly 88% in the Sonoran Desert portions my study area, and nearly 66% in the Mojave Desert regions. Under the same scenario chuckwallas lost nearly 92%, but increased 120% respectively. Within the context of climate change potential increases in drought frequency appear to present the greater challenge for these species. (C) 2011 Elsevier Ltd. All rights reserved,


英文关键词Chuckwalla Climate change Desert tortoise Joshua Tree National Park Mahalanobis D-2 Mojave Desert Niche modeling Sonoran Desert
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000289599800002
WOS关键词CHUCKWALLA SAUROMALUS-OBESUS ; GOPHERUS AGASSIZII ; BODY-SIZE ; HABITAT ; MODEL ; POPULATIONS ; TORTOISES ; LIZARD ; REPRODUCTION ; CALIFORNIA
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/2XILL650/168886
作者单位(1)Univ Calif Riverside, Ctr Conservat Biol, Riverside, CA 92521 USA
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GB/T 7714
Barrows, C. W.. Sensitivity to climate change for two reptiles at the Mojave-Sonoran Desert interface[J],2011,75(7):629-635.
APA Barrows, C. W..(2011).Sensitivity to climate change for two reptiles at the Mojave-Sonoran Desert interface.JOURNAL OF ARID ENVIRONMENTS,75(7),629-635.
MLA Barrows, C. W.."Sensitivity to climate change for two reptiles at the Mojave-Sonoran Desert interface".JOURNAL OF ARID ENVIRONMENTS 75.7(2011):629-635.
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