干旱区生态环境知识资源中心(Arid): Contrasting adaptive strategies by Caragana korshinskii and Salix psammophila in a semiarid revegetated ecosystem

Arid

DOI	10.1016/j.agrformet.2021.108323
	Contrasting adaptive strategies by Caragana korshinskii and Salix psammophila in a semiarid revegetated ecosystem
	Zhao, Ying; Wang, Li; Knighton, James; Evaristo, Jaivime; Wassen, Martin
通讯作者	Wang, L (corresponding author), Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China. ; Wang, L (corresponding author), Xinong Rd 26, Yangling 712100, Shaanxi, Peoples R China.
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2021
卷号	300
英文摘要	Salix psammophila and Caragana korshinskii are pioneer species used for revegetating farmlands on the Loess Plateau. Understanding the water-use strategies and physiological characteristics of these two species are important for evaluating their adaptability in water-limited ecosystems. We used stable isotopes (D and O-18), physiological parameters (e.g. midday and predawn leaf water potential and stomatal conductance (psi(md), psi(pd) and g(s), respectively)) and foliar delta C-13 to analyse water sources, isohydric/anisohydric behaviour, and water-use efficiency (WUE), respectively, of these two shrub species. Our results show that S. psammophila relied on water (mean 60%) from the intermediate soil layer (30-80 cm from the surface) during the dry period (May and June), while C. korshinskii relied on water from the deep soil layer (80-100 cm) (mean 52%). Both species shifted to using water from the shallow layer (0-30 cm) during the wet period (July and August) (mean 61% for S. psammophila and 51% for C. korshinskii). These root water uptake patterns are consistent with C. korshinskii's physiological performance, which in turn is consistent with a description that C. korshinskii is an anisohydric species as evidenced by a steeper slope of the relationship between psi(md) and psi(pd) (sigma, 1.88), and a larger difference between psi(md) and psi(pd) (Delta psi, -1.66 +/- 0.10 MPa). In contrast, S. psammophila could be described as an isohydric species (0.82 for s and -0.77 +/- 0.02 MPa for Delta psi). Surprisingly, despite being anisohydric, C. korshinski showed greater long-term WUE than isohydric S. psammophila, particularly during the dry season. Insofar as water availability is concerned, these results show that the environmental adaptability of C. korshinskii may generally be more ecologically plastic than that of S. psammophila. Our study serves as a reference for evaluating the persistence of shrub species in relation to the management and restoration of ecosystems.
英文关键词	Loess plateau Water-use strategy O-18 and D Iso/anisohydric behaviour Leaf water potential Foliar delta C-13
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000635674500012
WOS关键词	CARBON-ISOTOPE DISCRIMINATION ; WATER-USE EFFICIENCY ; MU US DESERT ; LOESS PLATEAU ; STABLE-ISOTOPES ; ECOHYDROLOGICAL SEPARATION ; SPATIOTEMPORAL VARIATION ; ANISOHYDRIC BEHAVIOR ; DARK RESPIRATION ; PINUS-SYLVESTRIS
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368853
作者单位	[Zhao, Ying; Wang, Li] Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; [Zhao, Ying] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wang, Li; Evaristo, Jaivime] Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China; [Knighton, James] Univ Connecticut, Dept Nat Resources & Environm, Storrs, CT USA; [Evaristo, Jaivime; Wassen, Martin] Univ Utrecht, Copernicus Inst Sustainable Dev, Utrecht, Netherlands
推荐引用方式 GB/T 7714	Zhao, Ying,Wang, Li,Knighton, James,et al. Contrasting adaptive strategies by Caragana korshinskii and Salix psammophila in a semiarid revegetated ecosystem[J]. 西北农林科技大学,2021,300.
APA	Zhao, Ying,Wang, Li,Knighton, James,Evaristo, Jaivime,&Wassen, Martin.(2021).Contrasting adaptive strategies by Caragana korshinskii and Salix psammophila in a semiarid revegetated ecosystem.AGRICULTURAL AND FOREST METEOROLOGY,300.
MLA	Zhao, Ying,et al."Contrasting adaptive strategies by Caragana korshinskii and Salix psammophila in a semiarid revegetated ecosystem".AGRICULTURAL AND FOREST METEOROLOGY 300(2021).