干旱区生态环境知识资源中心(Arid): Sage-Grouse Population Dynamics are Adversely Affected by Overabundant Feral Horses

Arid

DOI	10.1002/jwmg.22089
	Sage-Grouse Population Dynamics are Adversely Affected by Overabundant Feral Horses
	Coates, Peter S.; O'neil, Shawn T.; Munoz, Diana A.; Dwight, Ian A.; Tull, John C.
通讯作者	Coates, PS (corresponding author), US Geol Survey, Western Ecol Res Ctr, Dixon Field Stn, 800 Business Pk Rd, Dixon, CA 95620 USA.
来源期刊	JOURNAL OF WILDLIFE MANAGEMENT
ISSN	0022-541X
EISSN	1937-2817
出版年	2021
卷号	85 期号:6 页码:1132-1149
英文摘要	In recent decades, feral horse (Equus caballus; horse) populations increased in sagebrush (Artimesia spp.) ecosystems, especially within the Great Basin, to the point of exceeding maximum appropriate management levels (AML(max)), which were set by land administrators to balance resource use by feral horses, livestock, and wildlife. Concomitantly, greater sage-grouse (Centrocercus urophasianus; sage-grouse) are sagebrush obligates that have experienced population declines within these same arid environments as a result of steady and continued loss of seasonal habitats. Although a strong body of research indicates that overabundant populations of horses degrade sagebrush ecosystems, empirical evidence linking horse abundance to sage-grouse population dynamics is missing. Within a Bayesian framework, we employed state-space models to estimate population rate of change (lambda) using 15 years (2005-2019) of count surveys of male sage-grouse at traditional breeding grounds (i.e., leks) as a function of horse abundance relative to AML(max) and other environmental covariates (e.g., wildfire, precipitation, % sagebrush cover). Additionally, we employed a post hoc impact-control design to validate existing AML(max) values as related to sage-grouse population responses, and to help control for environmental stochasticity and broad-scale oscillations in sage-grouse abundance. On average, for every 50% increase in horse abundance over AML(max), our model predicted an annual decline in sage-grouse abundance by 2.6%. Horse abundance at or below AML(max) coincided with sage-grouse lambda estimates that were consistent with trends at non-horse areas elsewhere in the study region. Thus, AML(max), as a whole, appeared to be set adequately in preventing adverse effects to sage-grouse populations. Results indicated 76%, 97%, and >99% probability of sage-grouse population decline relative to controls when horse numbers are 2, 2.5, and >= 3 times over AML(max), respectively. As of 2019, horse herds exceeded AML(max) in Nevada, USA, by >4 times on average across all horse management areas. If feral horse populations continue to grow at current rates unabated, model projections indicate sage-grouse populations will be reduced within horse-occupied areas by >70.0% by 2034 (15-year projection), on average compared to 21.2% estimated for control sites. A monitoring framework that improves on estimating horse abundance and identifying responses of sage-grouse and other key indicator species (plant and animal) would be beneficial to guide management decisions that promote co-occurrence of horses with sensitive wildlife and livestock within landscapes subjected to multiple uses. Published 2021. This article is a U.S. Government work and is in the public domain in the USA. The Journal of Wildlife Management published by Wiley Periodicals LLC on behalf of The Wildlife Society.
英文关键词	appropriate management level Centrocercus urophasianus Equus caballus free-roaming Herd Management Area Nevada sage-grouse state-space model wild horse
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000678224600010
WOS关键词	FREE-ROAMING HORSES ; BAYESIAN MODEL SELECTION ; STATE-SPACE MODELS ; HABITAT SELECTION ; SAGEBRUSH ECOSYSTEMS ; VARIABLE SELECTION ; NESTING HABITAT ; WILD HORSES ; IMPACTS ; MANAGEMENT
WOS类目	Ecology ; Zoology
WOS研究方向	Environmental Sciences & Ecology ; 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/2XILL650/368006
作者单位	[Coates, Peter S.; O'neil, Shawn T.; Munoz, Diana A.; Dwight, Ian A.] US Geol Survey, Western Ecol Res Ctr, Dixon Field Stn, 800 Business Pk Rd, Dixon, CA 95620 USA; [Tull, John C.] US Fish & Wildlife Serv, Sci Applicat, Pacific Southwest Reg, 1340 Financial Blvd, Reno, NV 89502 USA
推荐引用方式 GB/T 7714	Coates, Peter S.,O'neil, Shawn T.,Munoz, Diana A.,et al. Sage-Grouse Population Dynamics are Adversely Affected by Overabundant Feral Horses[J]. United States Geological Survey,2021,85(6):1132-1149.
APA	Coates, Peter S.,O'neil, Shawn T.,Munoz, Diana A.,Dwight, Ian A.,&Tull, John C..(2021).Sage-Grouse Population Dynamics are Adversely Affected by Overabundant Feral Horses.JOURNAL OF WILDLIFE MANAGEMENT,85(6),1132-1149.
MLA	Coates, Peter S.,et al."Sage-Grouse Population Dynamics are Adversely Affected by Overabundant Feral Horses".JOURNAL OF WILDLIFE MANAGEMENT 85.6(2021):1132-1149.