干旱区生态环境知识资源中心(Arid): The elevational ascent and spread of exotic annual grass dominance in the Great Basin, USA

Arid

DOI	10.1111/ddi.13440
	The elevational ascent and spread of exotic annual grass dominance in the Great Basin, USA
	Smith, Joseph T.; Allred, Brady W.; Boyd, Chad S.; Davies, Kirk W.; Jones, Matthew O.; Kleinhesselink, Andrew R.; Maestas, Jeremy D.; Morford, Scott L.; Naugle, David E.
通讯作者	Smith, JT (corresponding author), Univ Montana, Numer Terradynam Simulat Grp, Missoula, MT 59812 USA.
来源期刊	DIVERSITY AND DISTRIBUTIONS
ISSN	1366-9516
EISSN	1472-4642
出版年	2022
卷号	28 期号:1 页码:83-96
英文摘要	Aim In the western United States, sagebrush (Artemisia spp.) and salt desert shrublands are rapidly transitioning to communities dominated by exotic annual grasses, a novel and self-reinforcing state that threatens the economic sustainability and conservation value of rangelands. Climate change is predicted to favour annual grasses, potentially pushing transitions to annual grass dominance into higher elevations and north-facing aspects. We sought to quantify expansion of annual grass-dominated vegetation communities along topographic gradients over the past several decades. Location Our analysis focused on rangelands among three ecoregions in the Great Basin of the western United States, where several species of exotic annual grasses are widespread among shrub and perennial grass-dominated vegetation communities. Methods We used recently developed remote sensing-based rangeland vegetation data to produce yearly maps of annual grass-dominated vegetation communities spanning 1990-2020. With these maps, we quantified the rate of spread and characterized changes in the topographic distribution (i.e. elevation and aspect) of areas transitioning to annual grass dominance. Results We documented more than an eightfold increase in annual grass-dominated area since 1990, occurring at an average rate of >2,300 km(2) year(-1) (0.6% of the area of Great Basin rangelands). In 2020, annual grasses dominated approximately one-fifth (>77,000 km(2)) of Great Basin rangelands. This rapid expansion was associated with a broadening topographic niche, with widespread movement into higher elevations and north-facing aspects consistent with predicted effects of a warming climate. Main conclusions More than a century after first appearing in the region, exotic annual grasses continue to proliferate and establish dominance in new environments across the Great Basin. Accelerated, strategic intervention is critically needed to conserve vulnerable sagebrush and salt desert shrub communities not yet heavily invaded. In this era of warming, future climate provides important context for selecting from among alternative management actions and judging long-term prospects of success.
英文关键词	Bromus tectorum climate change elevation grass-fire cycle invasion rangeland analysis platform rangelands remote sensing
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:000719645800001
WOS关键词	CHEATGRASS BROMUS-TECTORUM ; INVASIVE GRASS ; CLIMATE-CHANGE ; UNITED-STATES ; FIRE ; IMPACTS ; REGRESSION ; ECOSYSTEMS ; WILDFIRE ; SOIL
WOS类目	Biodiversity Conservation ; Ecology
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374367
作者单位	[Smith, Joseph T.; Allred, Brady W.; Jones, Matthew O.; Kleinhesselink, Andrew R.; Morford, Scott L.] Univ Montana, Numer Terradynam Simulat Grp, Missoula, MT 59812 USA; [Allred, Brady W.; Naugle, David E.] Univ Montana, WA Franke Coll Forestry & Conservat, Missoula, MT 59812 USA; [Boyd, Chad S.; Davies, Kirk W.] ARS, USDA, Burns, OR USA; [Maestas, Jeremy D.] USDA, Nat Resources Conservat Serv, Portland, OR USA
推荐引用方式 GB/T 7714	Smith, Joseph T.,Allred, Brady W.,Boyd, Chad S.,et al. The elevational ascent and spread of exotic annual grass dominance in the Great Basin, USA[J],2022,28(1):83-96.
APA	Smith, Joseph T..,Allred, Brady W..,Boyd, Chad S..,Davies, Kirk W..,Jones, Matthew O..,...&Naugle, David E..(2022).The elevational ascent and spread of exotic annual grass dominance in the Great Basin, USA.DIVERSITY AND DISTRIBUTIONS,28(1),83-96.
MLA	Smith, Joseph T.,et al."The elevational ascent and spread of exotic annual grass dominance in the Great Basin, USA".DIVERSITY AND DISTRIBUTIONS 28.1(2022):83-96.