干旱区生态环境知识资源中心(Arid): Toward an extreme world: The hyper-arid ecosystem as a natural model

Arid

DOI	10.1002/ecs2.4586
	Toward an extreme world: The hyper-arid ecosystem as a natural model
	Groner, Elli; Babad, Avshalom; Swiderski, Naomi Berda; Shachak, Moshe
通讯作者	Groner, E
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2023
卷号	14 期号:6
英文摘要	The forecasted increased frequency and intensity of extreme climatic events may strongly affect ecosystem structure and function in the future. It is unclear how ecosystems will function in the long run over a large spatial scale under a new extreme water cycle. This open question calls for a conceptual framework as a fundamental basis for theoretical and experimental exploration of ecosystem function on a large scale driven by an extreme climate envelope. To assess the problem on a large scale, we investigated hyper-arid ecosystems (HAEs) as natural tangible models that already function under an extreme climatic envelope. Our new assertion is that if extreme climate change drives arid lands to function under alternate extreme conditions, then arid land ecosystems will function like an HAE as an alternative state, rather than progress to desertification. To support our assertion, we developed a conceptual framework of HAEs that includes a geo-hydrological abiotic engine that drives HAE function by soil moisture diversity and plant functional groups. Based on this conceptual framework, we suggest incorporating two new hypotheses in climate change studies to advance our understanding of responses of large-scale, water-limited ecosystems: (1) Hydro-climatic extremes in water-limited ecosystems will reduce the degree of resource conservation by slope ecosystems due to reduction in plant cover and soil. The decreased ecosystem function on the slope will be compensated for by increasing the effect of the abiotic engine on the ephemeral stream, thus enhancing meta-ecosystem functioning in the ephemeral stream. (2) In water-limited ecosystems, climate change toward hydro-climatic extremes will rescale the dominant hydro-ecological processes of pulse-reserve, source-sink, and connectivity along the semiarid, arid, and HA gradients in two ways: (i) shrinking of both spatial and temporal dimensions; and (ii) shrinking in the temporal dimension and expanding in the spatial dimensions. The first rescaling trajectory is related to biodiversity-ecosystem function and the second to the abiotic engine processes.
英文关键词	connectivity desertification eco-hydrology source-sink stream order
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001009024100001
WOS关键词	ATACAMA DESERT ; ORGANIC-CARBON ; WATER-UPTAKE ; SOIL ; PATTERNS ; BIODIVERSITY ; VEGETATION ; PRODUCTIVITY ; STABILITY ; RIVER
WOS类目	Ecology
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/2XILL650/396033
推荐引用方式 GB/T 7714	Groner, Elli,Babad, Avshalom,Swiderski, Naomi Berda,et al. Toward an extreme world: The hyper-arid ecosystem as a natural model[J],2023,14(6).
APA	Groner, Elli,Babad, Avshalom,Swiderski, Naomi Berda,&Shachak, Moshe.(2023).Toward an extreme world: The hyper-arid ecosystem as a natural model.ECOSPHERE,14(6).
MLA	Groner, Elli,et al."Toward an extreme world: The hyper-arid ecosystem as a natural model".ECOSPHERE 14.6(2023).