干旱区生态环境知识资源中心(Arid): Constraints on shrub cover and shrub-shrub competition in a US southwest desert

Arid

DOI	10.1002/ecs2.2590
	Constraints on shrub cover and shrub-shrub competition in a US southwest desert
	Ji, Wenjie 1; Hanan, Niall P.1; Browning, Dawn M.2,3; Monger, H. Curtis 4; Peters, Debra P. C.2,3; Bestelmeyer, Brandon T.2,3; Archer, Steve R.5; Ross, C. Wade 1; Lind, Brianna M.1; Anchang, Julius 1; Kumar, Sanath S.1; Prihodko, Lara 6
通讯作者	Ji, Wenjie
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2019
卷号	10 期号:2
英文摘要	The cover of woody perennial plants (trees and shrubs) in arid ecosystems is at least partially constrained by water availability. However, the extent to which maximum canopy cover is limited by rainfall and the degree to which soil water holding capacity and topography impacts maximum shrub cover are not well understood. Similar to other deserts in the U.S. southwest, plant communities at the Jomada Basin Long-Term Ecological Research site in the northern Chihuahuan Desert have experienced a long-term state change from perennial grassland to shrubland dominated by woody plants. To better understand this transformation, and the environmental controls and constraints on shrub cover, we created a shrub cover map using high spatial resolution images and explored how maximum shrub cover varies with landform, water availability, and soil characteristics. Our results indicate that when clay content is below similar to 18%, the upper limit of shrub cover is positively correlated with plant available water as mediated by surface soil clay influence on water retention. At surface soil day contents >18%, maximum shrub cover decreases, presumably because the amount of water percolating to depths preferentially used by deep-rooted shrubs is diminished. In addition, the relationship between shrub cover and density suggests that self-thinning occurs in denser stands in most landforms of the Jomada Basin, indicating that shrub-shrub competition interacts with soil properties to constrain maximum shrub cover in the northern Chihuahuan Desert.
英文关键词	Jornada Basin Long-Term Ecological Research (LTER) shrub-shrub competition Southwestern US drylands Special Feature: Dynamic Deserts woody plant encroachment
类型	Article
语种	英语
国家	USA
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000461577000013
WOS关键词	WOODY VEGETATION COVER ; CHIHUAHUAN DESERT ; SOIL ; ENCROACHMENT ; GRASSLAND ; SAVANNA ; DYNAMICS ; PATTERNS ; RAINFALL ; FIRE
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/2XILL650/215296
作者单位	1.New Mexico State Univ, Plant & Environm Sci, Skeen Hall, Las Cruces, NM 88003 USA; 2.USDA ARS, Jornada Expt Range, POB 30003,MSC 3JER, Las Cruces, NM 88003 USA; 3.New Mexico State Univ, Jornada Basin Long Term Ecol Res Program, POB 30003,MSC 3JER, Las Cruces, NM 88003 USA; 4.USDA NRCS, Natl Soil Survey Ctr, 100 Centennial Mall, Lincoln, NE 68508 USA; 5.Univ Arizona, Sch Nat Resources & Environm, ENR2-N358, Tucson, AZ 85721 USA; 6.New Mexico State Univ, Anim & Range Sci, Knox Hall, Las Cruces, NM 88003 USA
推荐引用方式 GB/T 7714	Ji, Wenjie,Hanan, Niall P.,Browning, Dawn M.,et al. Constraints on shrub cover and shrub-shrub competition in a US southwest desert[J]. University of Arizona, New Mexico State University,2019,10(2).
APA	Ji, Wenjie.,Hanan, Niall P..,Browning, Dawn M..,Monger, H. Curtis.,Peters, Debra P. C..,...&Prihodko, Lara.(2019).Constraints on shrub cover and shrub-shrub competition in a US southwest desert.ECOSPHERE,10(2).
MLA	Ji, Wenjie,et al."Constraints on shrub cover and shrub-shrub competition in a US southwest desert".ECOSPHERE 10.2(2019).