干旱区生态环境知识资源中心(Arid): A range-wide model of contemporary, omnidirectional connectivity for the threatened Mojave desert tortoise

Arid

DOI	10.1002/ecs2.2847
	A range-wide model of contemporary, omnidirectional connectivity for the threatened Mojave desert tortoise
	Gray, Miranda E.; Dickson, Brett G.; Nussear, Kenneth E.; Esque, Todd C.; Chang, Tony
通讯作者	Gray, ME (corresponding author), Conservat Sci Partners, 11050 Pioneer Trail,Suite 202, Truckee, CA 96161 USA.
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2019
卷号	10 期号:9
英文摘要	As habitat destruction leads to species extinctions globally, conservation planning that accounts for population-level connectivity and gene flow is an urgent priority. Models that only approximate habitat potential are incomplete because areas of high habitat potential may be isolated, whereas intermixed areas of lower habitat potential may still be critical for maintaining connectivity between and among populations. We developed a range-wide, omnidirectional (coreless) connectivity model and map for the threatened Mojave desert tortoise at a high spatial resolution (30 m), based on empirical movement data and a circuit-theoretic approach to estimating connectivity. Specifically, we first estimated habitat potential (i.e., quality) for tortoise movement (as distinct from habitat potential more generally) across its range using hypotheses based on the published literature, linear mixed models, multiple environmental factors derived from remotely sensed data, and recent solar and wind development footprints. The resultant raster output was used to represent landscape conductance in a circuit-theoretic model of connectivity, which relates the flow of electrical current through a circuit to the movement of tortoises through the landscape. We then modeled potential connectivity across the range of the tortoise using Circuitscape software and the Julia numerical programming language. Intermediate distances from minor roads, intermediate values of annual average maximum temperature, and increasing density of desert washes were among the strongest predictors of movement habitat quality. There was also strong evidence for increased habitat quality for movement with increasing amounts of vegetation cover. The resulting connectivity model and map was determined to accurately reflect important areas for tortoise movement, but we encourage others to do their own evaluation of the model within local areas of interest and as more data become available. Accordingly, the map can provide an important component to improve management decisions that have the potential to influence the conservation of connected desert tortoise populations throughout the range.
英文关键词	circuit theory connectivity conservation Mojave desert tortoise
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000490766500022
WOS关键词	CIRCUIT-THEORY ; GENE FLOW ; HABITAT ; CONSERVATION ; LANDSCAPE ; MOVEMENT ; BARRIERS ; ECOLOGY ; PLANT
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
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/2XILL650/369826
作者单位	[Gray, Miranda E.; Dickson, Brett G.; Chang, Tony] Conservat Sci Partners, 11050 Pioneer Trail,Suite 202, Truckee, CA 96161 USA; [Dickson, Brett G.] No Arizona Univ, Landscape Conservat Initiat, POB 5694, Flagstaff, AZ 86011 USA; [Nussear, Kenneth E.] Univ Nevada, Dept Geog, Mackay Sci Bldg, Reno, NV 89512 USA; [Esque, Todd C.] US Geol Survey, Las Vegas Field Stn, Western Ecol Res Ctr, 160 North Stephanie St, Henderson, NV 89074 USA
推荐引用方式 GB/T 7714	Gray, Miranda E.,Dickson, Brett G.,Nussear, Kenneth E.,et al. A range-wide model of contemporary, omnidirectional connectivity for the threatened Mojave desert tortoise[J]. United States Geological Survey,2019,10(9).
APA	Gray, Miranda E.,Dickson, Brett G.,Nussear, Kenneth E.,Esque, Todd C.,&Chang, Tony.(2019).A range-wide model of contemporary, omnidirectional connectivity for the threatened Mojave desert tortoise.ECOSPHERE,10(9).
MLA	Gray, Miranda E.,et al."A range-wide model of contemporary, omnidirectional connectivity for the threatened Mojave desert tortoise".ECOSPHERE 10.9(2019).