干旱区生态环境知识资源中心(Arid): Ring formation in Stipagrostis obtusa in the arid north-eastern Negev, Israel

Arid

DOI	10.1016/j.flora.2023.152353
	Ring formation in Stipagrostis obtusa in the arid north-eastern Negev, Israel
	Yizhaq, Hezi; Stavi, Ilan
通讯作者	Yizhaq, H
来源期刊	FLORA
ISSN	0367-2530
EISSN	1618-0585
出版年	2023
卷号	306
英文摘要	In drylands, particularly in sandy environments, clonal plants occasionally develop into ring patterns that slowly expand radially, leaving bare soil in the ring's center. Several mechanisms have been suggested to explain ring formation, and yet it is very difficult to find out the dominant driving mechanism for each specific ecosystem. This study is the first to assess the rings of Stipagrostis obtusa in the north-eastern Negev of Israel, an arid region with mean annual precipitation of & AP;65 mm. Our results propose that S. obtusa rings form in response to the infiltration feedback, which is enhanced by microtopography; the rings developed on small mounds due to continuous deposition of sand and dust. The infiltration feedback is caused by the sharp contrast in water infiltrability between the rings and the inter-ring spaces, where infiltration is lower. In addition, during heavy rainstorms, runoff generated in the inter-ring spaces partially percolates in the rings' periphery and enhances radial expansion. These source-sink relations increase water availability for the S. obtusa plants, increasing their resilience to the harsh dryland conditions.
英文关键词	Central dieback Infiltration feedback Soil texture Soil water Vegetation patterns
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001059438200001
WOS关键词	VEGETATION PATTERNS ; SELF-ORGANIZATION ; FAIRY CIRCLES ; SOIL ; CARBON ; 1ST ; ECOSYSTEMS ; MECHANISMS ; DYNAMICS ; CLONES
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396366
推荐引用方式 GB/T 7714	Yizhaq, Hezi,Stavi, Ilan. Ring formation in Stipagrostis obtusa in the arid north-eastern Negev, Israel[J],2023,306.
APA	Yizhaq, Hezi,&Stavi, Ilan.(2023).Ring formation in Stipagrostis obtusa in the arid north-eastern Negev, Israel.FLORA,306.
MLA	Yizhaq, Hezi,et al."Ring formation in Stipagrostis obtusa in the arid north-eastern Negev, Israel".FLORA 306(2023).