干旱区生态环境知识资源中心(Arid): Ecophysiology of an urban citrus orchard

Arid

DOI	10.1016/j.ufug.2021.127361
	Ecophysiology of an urban citrus orchard
	Qubaja, Rafat; Yang, Fulin; Amer, Madi; Tatarinov, Fyodor; Yakir, Dan
通讯作者	Qubaja, R ; Yakir, D (corresponding author), Weizmann Inst Sci, Dept Earth & Planetary Sci, IL-76100 Rehovot, Israel.
来源期刊	URBAN FORESTRY & URBAN GREENING
ISSN	1618-8667
EISSN	1610-8167
出版年	2021
卷号	65
英文摘要	Characterizing the carbon and water economy of non-commercial urban citrus orchards can help determine their value in urban settings. This includes provisions of urban ecology and ecosystem services, such as shade, conservation of biodiversity, and carbon sequestration, under space and water limitations that may be particularly suitable in the semi-arid Mediterranean regions. We carried out canopy-scale eddy covariance (EC) measurements of net ecosystem CO 2 exchange (NEE) and evapotranspiration (ET), partitioned these fluxes to their components using chamber-based soil fluxes, and combined them with carbon stock to provide a first approximation of the apparent ecosystem carbon turnover rate (tau(eco)). The urban orchard switched from a carbon sink of 0.6 mu mol m(-2) s(-1) to a carbon source of 0.2 mu mol m(-2) s(-1) between winter and summer, with a first approximation of the annual carbon storage capacity of similar to 75.3 g m(-2) and a total carbon accumulation over its 40 year life span of similar to 3014 g m(-2). Carbon accumulated predominantly below ground (67 % of total), and soil CO2 effluxes showed low sensitivity to temperature (Q(10) similar to 1.6) and therefore also to climate warming, but also a fast C turnover rate (similar to 5.4 y), and therefore sensitivity to disturbances. The rates of ET increased from 0.40 to 1.25 mu mol m(-2) s(-1) between the wet and dry seasons, and was similar to 50 % of a similar nearby commercial orchard. Partitioning of the ecosystem carbon and water fluxes indicated high canopy water use efficiency (11.7 mu mol CO2/mmol H2O; during the peak activity period). We demonstrate the potential of urban citrus orchards with low supplemental irrigation (50 % compared with commercial orchards in the area) to store significant amounts of carbon with high transpiration efficiencies. The results will help decision making in regard to urban tree planting and the ecological management of urban green spaces and community use in water-limited environments.
英文关键词	Ecosystem services Flux partition Soil chamber Soil evaporation and respiration Urban ecology Urban green spaces Water use efficiency (WUE)
类型	Article
语种	英语
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000705995600005
WOS关键词	CARBON STORAGE ; SOIL RESPIRATION ; ECOSYSTEM RESPIRATION ; USE EFFICIENCY ; CO2 EFFLUX ; TREES ; EVAPOTRANSPIRATION ; TEMPERATURE ; EXCHANGE ; FLUXES
WOS类目	Plant Sciences ; Environmental Studies ; Forestry ; Urban Studies
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry ; Urban Studies
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364817
作者单位	[Qubaja, Rafat; Yang, Fulin; Amer, Madi; Tatarinov, Fyodor; Yakir, Dan] Weizmann Inst Sci, Dept Earth & Planetary Sci, IL-76100 Rehovot, Israel
推荐引用方式 GB/T 7714	Qubaja, Rafat,Yang, Fulin,Amer, Madi,et al. Ecophysiology of an urban citrus orchard[J],2021,65.
APA	Qubaja, Rafat,Yang, Fulin,Amer, Madi,Tatarinov, Fyodor,&Yakir, Dan.(2021).Ecophysiology of an urban citrus orchard.URBAN FORESTRY & URBAN GREENING,65.
MLA	Qubaja, Rafat,et al."Ecophysiology of an urban citrus orchard".URBAN FORESTRY & URBAN GREENING 65(2021).