干旱区生态环境知识资源中心(Arid): Grass-Shrub Competition in Arid Lands: An Overlooked Driver in Grassland-Shrubland State Transition?

Arid

DOI	10.1007/s10021-018-0290-9
	Grass-Shrub Competition in Arid Lands: An Overlooked Driver in Grassland-Shrubland State Transition?
	Pierce, Nathan A.1; Archer, Steven R.1; Bestelmeyer, Brandon T.2; James, Darren K.2
通讯作者	Pierce, Nathan A.
来源期刊	ECOSYSTEMS
ISSN	1432-9840
EISSN	1435-0629
出版年	2019
卷号	22 期号:3 页码:619-628
英文摘要	Traditional models of state transition in arid lands emphasize changes in disturbance regimes and abiotic feedbacks that promote the degradation of grassland into shrubland, whereas biotic interactions like competition and facilitation are often overlooked. Here, we conducted an experiment to determine whether shrubs have a positive, neutral, or negative effect on grasses and if these interactions may play a role in grassland-shrubland state transition. Prosopis glandulosa shrub neighbors within 5m of Bouteloua eriopoda grass patches were left intact (controls) or killed with foliar herbicide, and metrics of grass performance were evaluated over 5years. We saw no evidence of shrub facilitation of grasses. Instead, grass ANPP responded positively to shrub removal in all years, but more so in years with above-average rainfall. Grass allocation to vegetative reproduction and grass patch size also increased when shrub neighbors were removed. These results demonstrate that biotic interference by shrubs upon grasses reinforce and magnify grazing- and drought-induced abiotic feedbacks during grassland-shrubland transitions. Shrub effects on grass should therefore be considered a key process in desert grassland state transitions.
英文关键词	Bouteloua eriopoda Chihuahuan desert Competition Grassland Prosopis glandulosa Shrubland State transition Woody plant encroachment
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000465453900011
WOS关键词	NORTH-AMERICAN GRASSLANDS ; HYDRAULIC REDISTRIBUTION ; DESERT GRASSLAND ; SOIL NUTRIENTS ; ROOT SYSTEMS ; ENCROACHMENT ; FACILITATION ; TREES ; WATER ; DESERTIFICATION
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
来源机构	University of Arizona ; New Mexico State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215327
作者单位	1.Univ Arizona, Sch Nat Resources & Environm, ENR2-N325,1064 E Lowell St, Tucson, AZ 85721 USA; 2.New Mexico State Univ, USDA ARS, Jornada Expt Range, Jornada Basin Long Term Ecol Res Program, Las Cruces, NM 88003 USA
推荐引用方式 GB/T 7714	Pierce, Nathan A.,Archer, Steven R.,Bestelmeyer, Brandon T.,et al. Grass-Shrub Competition in Arid Lands: An Overlooked Driver in Grassland-Shrubland State Transition?[J]. University of Arizona, New Mexico State University,2019,22(3):619-628.
APA	Pierce, Nathan A.,Archer, Steven R.,Bestelmeyer, Brandon T.,&James, Darren K..(2019).Grass-Shrub Competition in Arid Lands: An Overlooked Driver in Grassland-Shrubland State Transition?.ECOSYSTEMS,22(3),619-628.
MLA	Pierce, Nathan A.,et al."Grass-Shrub Competition in Arid Lands: An Overlooked Driver in Grassland-Shrubland State Transition?".ECOSYSTEMS 22.3(2019):619-628.