干旱区生态环境知识资源中心(Arid): Dead shrub patches as ecosystem engineers in degraded drylands

Arid

DOI	10.1007/s11442-021-1892-2
	Dead shrub patches as ecosystem engineers in degraded drylands
	Stavi, Ilan; Zaady, Eli; Gusarov, Alexander; Yizhaq, Hezi
通讯作者	Stavi, I (corresponding author), Dead Sea & Arava Sci Ctr, IL-88820 Yotvata, Israel. ; Stavi, I (corresponding author), Ben Gurion Univ Negev, Eilat Campus, IL-88100 Elat, Israel.
来源期刊	JOURNAL OF GEOGRAPHICAL SCIENCES
ISSN	1009-637X
EISSN	1861-9568
出版年	2021
卷号	31 期号:8 页码:1187-1204
英文摘要	A long-term drought has led to the mass mortality of shrubs in the semi-arid Israeli Negev. The most impacted shrub species is the Noaea mucronata (Forssk.) Asch. and Schweinf. In a four-year study, we found that herbaceous vegetation growth was greater in the dead shrub patches than in the surrounding inter-patch biocrusted spaces, suggesting that the dead shrub patches encompass improved micro-habitats. However, unexpectedly, the soil moisture in the dead shrub patches was consistently lower than that of the inter-patch biocrusted spaces. At the same time, soil quality in the dead shrub patches was higher than that in the inter-patch spaces. Therefore, it seems that the overall better soil conditions in the dead patches overcome the scarcity of soil-water, supporting increased herbaceous productivity. For explaining the discrepancy between herbaceous vegetation and soil-water, we formulated a conceptual framework, which highlights the key factors that regulate soil-water dynamics in this dryland ecosystem. We demonstrate that herbaceous vegetation is facilitated in the dead shrub patches by a legacy effect that takes place long after the shrubs have died. The dead shrub patches encompass a unique form of ecosystem engineering. The study highlights the complex and unpredicted impacts of prolonged droughts on dryland ecosystems.
英文关键词	allogenic ecosystem engineers climate change legacy mechanism patchy vegetation small-scale geo-diversity vegetation transition
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000682661600007
WOS关键词	BIOLOGICAL SOIL CRUSTS ; NEGEV-DESERT ; VEGETATION PATCHES ; ORGANIC-MATTER ; PATTERNS ; DYNAMICS ; NITROGEN ; CARBON ; STABILITY ; MORTALITY
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
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/2XILL650/363881
作者单位	[Stavi, Ilan; Gusarov, Alexander] Dead Sea & Arava Sci Ctr, IL-88820 Yotvata, Israel; [Stavi, Ilan] Ben Gurion Univ Negev, Eilat Campus, IL-88100 Elat, Israel; [Zaady, Eli] Agr Res Org, Gilat Res Ctr, Dept Nat Resources, IL-85280 Negev, Israel; [Yizhaq, Hezi] Ben Gurion Univ Negev, Blaustein Inst Desert Res, Dept Solar Energy & Environm Phys, IL-84990 Sede Boqer, Israel
推荐引用方式 GB/T 7714	Stavi, Ilan,Zaady, Eli,Gusarov, Alexander,et al. Dead shrub patches as ecosystem engineers in degraded drylands[J]. Ben-Gurion University of the Negev,2021,31(8):1187-1204.
APA	Stavi, Ilan,Zaady, Eli,Gusarov, Alexander,&Yizhaq, Hezi.(2021).Dead shrub patches as ecosystem engineers in degraded drylands.JOURNAL OF GEOGRAPHICAL SCIENCES,31(8),1187-1204.
MLA	Stavi, Ilan,et al."Dead shrub patches as ecosystem engineers in degraded drylands".JOURNAL OF GEOGRAPHICAL SCIENCES 31.8(2021):1187-1204.