干旱区生态环境知识资源中心(Arid): Soil hydraulic properties and water source-sink relations affect plant rings' formation and sizes under arid conditions

Arid

DOI	10.1016/j.flora.2020.151664
	Soil hydraulic properties and water source-sink relations affect plant rings' formation and sizes under arid conditions
	Herooty, Yair; Bar, Pua (Kutiel); Yizhaq, Hezi; Katz, Ofir
通讯作者	Katz, O
来源期刊	FLORA
ISSN	0367-2530
EISSN	1618-0585
出版年	2020
卷号	270
英文摘要	In semi-arid and arid environments, clonal plants occasionally appear in ring patterns. There is a general agreement that this pattern forms when ramets grow radially, leaving a dead centre where the parent plant once was. Nevertheless, there is still some controversy over the actual causes of this dieback and how water source-sink relations in and around the rings are involved in their formation. We studied Asphodelus ramosus rings in two sites with different soil textures (sand and loess) but comparable climate, in order to understand whether differences in soil hydraulic properties create different water source-sink relations and mechanisms that drive ring formation. We characterised soil hydraulic properties and dynamics, accompanied by measurements of soil texture and of belowground storage root biomass. We found that the nature of source-sink relations varies with soil texture and properties. In sandy soils, water supply to ring perimeters is mainly from their centres. In loessial soils, water supply to ring perimeters is mainly from the surrounding matrix. Consequently, rings are larger in sandy soils than in loessial soils. This suggests that rings in both sites are formed by different mechanisms: fine particle deposition in the centres of ring in the sandy soil but competition over water in rings in the loessial soil. Studying the formation of rings and other vegetation spatial patterns should consider local soil properties and the possibility that similar patterns may emerge through various processes.
英文关键词	Asphodelus ramosus Desert Soil texture Soil water Vegetation spatial patterns Biological soil crusts
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000558752500003
WOS关键词	BUNCHGRASS ERAGROSTIS-CURVULA ; CENTRAL DIEBACK ; VEGETATION PATTERNS ; REYNOUTRIA-JAPONICA ; SELF-ORGANIZATION ; NEGEV ; MECHANISMS ; SUCCESSION ; DYNAMICS ; DESERT
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
来源机构	Ben-Gurion University of the Negev
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325572
作者单位	[Herooty, Yair; Bar, Pua (Kutiel)] Ben Gurion Univ Negev, Dept Geog & Environm Dev, IL-84105 Beer Sheva, Israel; [Yizhaq, Hezi] Ben Gurion Univ Negev, Blaustein Inst Desert Res, Dept Solar Energy & Environm Phys, IL-84990 Sede Boqer, Israel; [Katz, Ofir] Tamar Reg Council, Dead Sea & Arava Sci Ctr, IL-86910 Tamar, Israel; [Katz, Ofir] Ben Gurion Univ Negev, Eilat Campus, IL-88100 Elat, Israel
推荐引用方式 GB/T 7714	Herooty, Yair,Bar, Pua ,Yizhaq, Hezi,et al. Soil hydraulic properties and water source-sink relations affect plant rings' formation and sizes under arid conditions[J]. Ben-Gurion University of the Negev,2020,270.
APA	Herooty, Yair,Bar, Pua ,Yizhaq, Hezi,&Katz, Ofir.(2020).Soil hydraulic properties and water source-sink relations affect plant rings' formation and sizes under arid conditions.FLORA,270.
MLA	Herooty, Yair,et al."Soil hydraulic properties and water source-sink relations affect plant rings' formation and sizes under arid conditions".FLORA 270(2020).