干旱区生态环境知识资源中心(Arid): An Uncertain Future for a Population of Desert Tortoises Experiencing Human Impacts

Arid

DOI	10.1655/Herpetologica-D-18-00033
	An Uncertain Future for a Population of Desert Tortoises Experiencing Human Impacts
	Berry, Kristin H.1; Yee, Julie 2; Lyren, Lisa 3,4; Mack, Jeremy S.1,5
通讯作者	Berry, Kristin H.
来源期刊	HERPETOLOGICA
ISSN	0018-0831
EISSN	1938-5099
出版年	2020
卷号	76 期号:1 页码:1-11
英文摘要	We evaluated the status of a population of Mojave Desert Tortoises (Gapherus agassizii), a threatened species, in the El Paso Mountains of the northwestern Mojave Desert in California, USA. The study area lies north of and adjacent to a designated critical habitat unit for the species, is adjacent to a state park, and is a short distance from the Desert Tortoise Research Natural Area. We randomly sampled 373 1-ha plots from a 239.1-km(2) area in the mountain range to determine demographic attributes of the population, vegetation associations, predator presence, and human uses. Live and dead G. agassizii and sign (burrows, scats, tracks) occurred on 35.7% of plots. Densities of adults were higher than in adjacent critical habitat, and threats (traumatic injuries, infectious and other diseases) were similar to those reported elsewhere in the geographic range. Signs of human use were evident on 98.4% of plots. We used a multimodel approach to determine distribution of G. agassizii in relation to vegetation, anthropogenic, and predator variables. Vegetation, predators, trash, mining activity, and vehicles were important factors affecting the distribution and intensity of tortoise sign. We concluded that this population is in a downward trend, like other populations in the western Mojave Desert. The high death rate of adults, low population density, high human visitor use, and ongoing decline in the adjacent critical habitat unit indicate that a viable population is unlikely to persist in the study area. The future for the population found in the El Paso Mountains might depend on survival in the adjacent roadless El Paso Mountains Wilderness Area.
英文关键词	Anthropogenic impacts Climate warming Gopherus Models Mojave Desert Testudinidae
类型	Article
语种	英语
国家	USA
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000518803200001
WOS关键词	GOPHERUS-AGASSIZII ; MOJAVE DESERT ; STRATEGIES ; ABUNDANCE ; SURVIVAL ; PLANTS ; SITES ; ALIEN
WOS类目	Zoology
WOS研究方向	Zoology
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314656
作者单位	1.US Geol Survey, Western Ecol Res Ctr, 21803 Cactus Ave,Suite F, Riverside, CA 92518 USA; 2.US Geol Survey, Western Ecol Res Ctr, 2885 Mission St, Santa Cruz, CA 95060 USA; 3.US Geol Survey, Western Ecol Res Ctr, 2177 Salk Ave,Suite 250, Carlsbad, CA 92008 USA; 4.Coastal IPT, NAVFAC SW, San Diego, CA 92136 USA; 5.Lehigh Univ, 27 Mem Dr West, Bethlehem, PA 18015 USA
推荐引用方式 GB/T 7714	Berry, Kristin H.,Yee, Julie,Lyren, Lisa,et al. An Uncertain Future for a Population of Desert Tortoises Experiencing Human Impacts[J]. United States Geological Survey,2020,76(1):1-11.
APA	Berry, Kristin H.,Yee, Julie,Lyren, Lisa,&Mack, Jeremy S..(2020).An Uncertain Future for a Population of Desert Tortoises Experiencing Human Impacts.HERPETOLOGICA,76(1),1-11.
MLA	Berry, Kristin H.,et al."An Uncertain Future for a Population of Desert Tortoises Experiencing Human Impacts".HERPETOLOGICA 76.1(2020):1-11.