干旱区生态环境知识资源中心(Arid): Spatial variability in shrub vegetation across dune forms in central Saudi Arabia

Arid

DOI	10.1016/j.jaridenv.2018.10.003
	Spatial variability in shrub vegetation across dune forms in central Saudi Arabia
	Bradley, Andrew V.1,3; Haughan, Alice E.2,3; Al-Dughairi, Ahmed 4; McLaren, Sue J.5
通讯作者	Bradley, Andrew V.
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2019
卷号	161 页码:72-84
英文摘要	In desert dune environments, vegetation may be an indicator of dune stability and rates of sediment transport. As topography and underlying controls of vegetation vary over large spatial areas, variations in dune form make scaling up of field research difficult. To mitigate this, and to identify spatial variations in vegetation distributions in a Saudi Arabian sand sea, spectral information from high resolution satellite images was classified to map polygons of shrub vegetation over 360 km(2) of well-defined linear dunes, broken linear dunes and dome dune forms. When compared to topographic characteristics of the landscape, extracted from a digital elevation model, vegetation densities were often highest on 10-20 degrees slopes elevated above interdune salt deposits on dune flanks. Spatially this was confined to small areas, and density was not always related to dune form, more to access of groundwater which encouraged colonisation on the tops of some dunes. Field observations identified shrubs of mainly Calligonum genus whose size is related to the amounts of salts, moving sediment, and access to the water table that varies within and between dune forms. Shrub density is likened to surface roughness (z(0)) to better understand sediment movement and modelling in dunes.
英文关键词	Dune form Groundwater Slope Remote sensing WorldView-2 Wadi Al Rimah
类型	Article
语种	英语
国家	England ; Saudi Arabia
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000452936700008
WOS关键词	DUNEFIELD ACTIVITY ; SAND MOVEMENT ; DESERT ; COVER ; PLANT ; SOIL ; ENVIRONMENT ; DYNAMICS ; PATTERNS ; MOBILITY
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216712
作者单位	1.Univ Nottingham, Nottingham Geospatial Inst, Innovat Pk,Jubilee Campus, Nottingham NG7 2TU, England; 2.Zool Soc London, Regents Pk, London NWI 4RY, England; 3.Imperial Coll London, Dept Life Sci, Silwood Pk, Ascot SL5 7PY, Berks, England; 4.Qassim Univ, Geog Dept, Box 1343, Buraydah, Saudi Arabia; 5.Univ Leicester, Dept Geog, Univ Rd, Leicester LE1 7RH, Leics, England
推荐引用方式 GB/T 7714	Bradley, Andrew V.,Haughan, Alice E.,Al-Dughairi, Ahmed,et al. Spatial variability in shrub vegetation across dune forms in central Saudi Arabia[J],2019,161:72-84.
APA	Bradley, Andrew V.,Haughan, Alice E.,Al-Dughairi, Ahmed,&McLaren, Sue J..(2019).Spatial variability in shrub vegetation across dune forms in central Saudi Arabia.JOURNAL OF ARID ENVIRONMENTS,161,72-84.
MLA	Bradley, Andrew V.,et al."Spatial variability in shrub vegetation across dune forms in central Saudi Arabia".JOURNAL OF ARID ENVIRONMENTS 161(2019):72-84.