干旱区生态环境知识资源中心(Arid): Determining the source water and active root depth of woody plants using a deuterium tracer at a Savannah site in northern Stampriet Basin, Namibia

Arid

DOI	10.1007/s10040-023-02747-x
	Determining the source water and active root depth of woody plants using a deuterium tracer at a Savannah site in northern Stampriet Basin, Namibia
	Uugulu, Shoopala; Wanke, Heike; Koeniger, Paul
通讯作者	Uugulu, S
来源期刊	HYDROGEOLOGY JOURNAL
ISSN	1431-2174
EISSN	1435-0157
出版年	2024
卷号	32 期号:1 页码:189-201
英文摘要	Woody plants play a significant role in the global water cycle through water uptake by roots and evapotranspiration. A deuterium tracer was used to assess the active root depths for Salvia mellifera and Boscia albitrunca in the Ebenhaezer area (western Namibia). The tracer was inserted at different soil depths in December 2016. Xylem cores were obtained using an increment borer, and transpired water was collected using transpiration bags zipped around the plants' leaves. Groundwater was collected from boreholes. Soil samples were collected after the rainy season using a hand auger. Xylem and soil water were extracted using a cryogenic vacuum extraction method and analysed for stable water isotopes. Only one S. mellifera transpiration sample showed a high deuterium content (516%o) where the tracer was inserted at 2.5-m soil depth. Elevated deuterium contents were observed in two S. mellifera xylem samples; tracer had been applied at 2.5 and 3 m depth (yielding 35 and 31%o deuterium, respectively), which constitutes a possible active-root depth range for S. mellifera. At the end of the study period (May 2017), the average delta O-18 value for B. albitrunca xylem samples was similar to that of groundwater. The delta O-18 value for S. mellifera was between that of soil water and groundwater, indicating that this species uses groundwater and soil water available for groundwater recharge. Determination of the active root depth and source water for these species would help improve hydrological modelling by incorporating the influence of woody plants on groundwater recharge.
英文关键词	Arid regions Stable water isotopes Deuterium tracer Namibia
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001103950600001
WOS关键词	SOIL-WATER ; ISOTOPIC COMPOSITION ; GROUNDWATER ; O-18 ; TRANSPIRATION ; EXTRACTION ; ENRICHMENT ; SEPARATION ; DYNAMICS ; RECHARGE
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404090
推荐引用方式 GB/T 7714	Uugulu, Shoopala,Wanke, Heike,Koeniger, Paul. Determining the source water and active root depth of woody plants using a deuterium tracer at a Savannah site in northern Stampriet Basin, Namibia[J],2024,32(1):189-201.
APA	Uugulu, Shoopala,Wanke, Heike,&Koeniger, Paul.(2024).Determining the source water and active root depth of woody plants using a deuterium tracer at a Savannah site in northern Stampriet Basin, Namibia.HYDROGEOLOGY JOURNAL,32(1),189-201.
MLA	Uugulu, Shoopala,et al."Determining the source water and active root depth of woody plants using a deuterium tracer at a Savannah site in northern Stampriet Basin, Namibia".HYDROGEOLOGY JOURNAL 32.1(2024):189-201.