气候变化领域集成服务门户(CCPortal): Speculations on the application of foliar 13C discrimination to reveal groundwater dependency of vegetation and provide estimates of root depth and rates of groundwater use

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DOI	10.5194/hess-22-4875-2018
	Speculations on the application of foliar 13C discrimination to reveal groundwater dependency of vegetation and provide estimates of root depth and rates of groundwater use
	Rumman R.; Cleverly J.; Nolan R.H.; Tarin T.; Eamus D.
发表日期	2018
ISSN	1027-5606
起始页码	4875
结束页码	4889
卷号	22 期号:9
英文摘要	Groundwater-dependent vegetation is globally distributed, having important ecological, social, and economic value. Along with the groundwater resources upon which it depends, this vegetation is under increasing threat through excessive rates of groundwater extraction. In this study we examined one shallow-rooted and two deep-rooted tree species at multiple sites along a naturally occurring gradient in depth-to-groundwater. We measured (i) stable isotope ratios of leaves (δ 13C), xylem, and groundwater (δ 2H and δ 18O); and (ii) leaf-vein density. We established that foliar discrimination of 13C (Δ13C) is a reliable indicator of groundwater use by vegetation and can also be used to estimate rooting depth. Through comparison with a continental-scale assessment of foliar Δ13C, we also estimated the upper limits to annual rates of groundwater use. We conclude that maximum rooting depth for both deep-rooted species ranged between 9.4 and 11.2 m and that annual rates of groundwater use ranged from ca. 1400 to 1700 mm for Eucalyptus camaldulensis and from 600 to 900 mm for Corymbia opaca. Several predictions about hydraulic and leaf traits arising from the conclusion that these two species made extensive use of groundwater were supported by additional independent studies of these species in central Australia. © Author(s) 2018.
语种	英语
scopus关键词	Groundwater; Vegetation; Continental scale; Economic values; Eucalyptus camaldulensis; Groundwater extraction; Groundwater use; Groundwater-dependent vegetations; Naturally occurring; Stable isotope ratios; Groundwater resources; carbon isotope; evergreen tree; groundwater; hydraulic conductivity; leaf; stable isotope; water chemistry; water use; xylem; Australia; Corymbia opaca; Eucalyptus camaldulensis
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159912
作者单位	Rumman, R., Terrestrial Ecohydrology Research Group, School of Life Sciences, University of Technology Sydney, P.O. Box 123, Broadway, NSW 2007, Australia; Cleverly, J., Terrestrial Ecohydrology Research Group, School of Life Sciences, University of Technology Sydney, P.O. Box 123, Broadway, NSW 2007, Australia; Nolan, R.H., Terrestrial Ecohydrology Research Group, School of Life Sciences, University of Technology Sydney, P.O. Box 123, Broadway, NSW 2007, Australia; Tarin, T., Terrestrial Ecohydrology Research Group, School of Life Sciences, University of Technology Sydney, P.O. Box 123, Broadway, NSW 2007, Australia; Eamus, D., Terrestrial Ecohydrology Research Group, School of Life Sciences, University of Technology Sydney, P.O. Box 123, Broadway, NSW 2007, Australia
推荐引用方式 GB/T 7714	Rumman R.,Cleverly J.,Nolan R.H.,et al. Speculations on the application of foliar 13C discrimination to reveal groundwater dependency of vegetation and provide estimates of root depth and rates of groundwater use[J],2018,22(9).
APA	Rumman R.,Cleverly J.,Nolan R.H.,Tarin T.,&Eamus D..(2018).Speculations on the application of foliar 13C discrimination to reveal groundwater dependency of vegetation and provide estimates of root depth and rates of groundwater use.Hydrology and Earth System Sciences,22(9).
MLA	Rumman R.,et al."Speculations on the application of foliar 13C discrimination to reveal groundwater dependency of vegetation and provide estimates of root depth and rates of groundwater use".Hydrology and Earth System Sciences 22.9(2018).