干旱区生态环境知识资源中心(Arid): Appropriate spatial scale for potential woody cover observation in Texas savanna

Arid

DOI	10.1007/s10980-019-00933-5
	Appropriate spatial scale for potential woody cover observation in Texas savanna
	Yang, Xuebin 1; Crews, Kelley 2; Frazier, Amy E.3; Kedron, Peter 3
通讯作者	Yang, Xuebin
来源期刊	LANDSCAPE ECOLOGY
ISSN	0921-2973
EISSN	1572-9761
出版年	2020
卷号	35 期号:1 页码:101-112
英文摘要	Context Potential woody cover, the upper bound of woody plant cover in savanna ecosystems, represents the end-point of woody plant encroachment and is highly relevant to the dynamics of savanna ecosystems. Objectives This study aims to identify the appropriate spatial scale for potential woody cover observation in the savanna of central Texas, USA. Methods The upper bound of woody plant cover was modeled over the east-west precipitation gradient of Texas savanna, at four different spatial scales respectively (30 m, 100 m, 250 m, and 500 m). Results The estimated upper bound of woody plant cover demonstrates a three-segment pattern across the precipitation gradient at all the four observation scales. The pattern begins with a low stable level and ends at a high stable level, with a linear transitional level in between. The magnitude of the upper bound under given precipitation conditions decreases with spatial scale, but stabilizes by 250 m scale. Conclusions A spatial scale between 250 and 500 m is recommended for potential woody cover observation. Water availability plays a more important role in limiting woody plant cover at larger spatial scales in savanna ecosystems. In addition, the scale dependency of upper bound woody plant cover is more pronounced in the arid region.
英文关键词	Savanna Potential woody cover Scale dependency Encroachment Precipitation gradient Quantile regression
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000498111000001
WOS关键词	PLANT ENCROACHMENT ; TREE COVER ; LAND-COVER ; QUANTILE REGRESSION ; PATCH-DYNAMICS ; NORTH ; VEGETATION ; INSIGHTS ; FOREST ; FIRE
WOS类目	Ecology ; Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography ; Geology
EI主题词	2019-11-23
来源机构	Arizona State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310977
作者单位	1.Kansas State Univ, Dept Plant Pathol, Manhattan, KS 66506 USA; 2.Univ Texas Austin, Dept Geog & Environm, Austin, TX 78712 USA; 3.Arizona State Univ, Spatial Anal Res Ctr SPARC, Sch Geog Sci & Urban Planning, Tempe, AZ 85281 USA
推荐引用方式 GB/T 7714	Yang, Xuebin,Crews, Kelley,Frazier, Amy E.,et al. Appropriate spatial scale for potential woody cover observation in Texas savanna[J]. Arizona State University,2020,35(1):101-112.
APA	Yang, Xuebin,Crews, Kelley,Frazier, Amy E.,&Kedron, Peter.(2020).Appropriate spatial scale for potential woody cover observation in Texas savanna.LANDSCAPE ECOLOGY,35(1),101-112.
MLA	Yang, Xuebin,et al."Appropriate spatial scale for potential woody cover observation in Texas savanna".LANDSCAPE ECOLOGY 35.1(2020):101-112.