干旱区生态环境知识资源中心(Arid): Isotopic Signatures as an Indicator of Long-Term Water-Use Efficiency of Haloxylon Plantations on the Dried Aral Sea Bed

Arid

DOI	10.3390/w12010099
	Isotopic Signatures as an Indicator of Long-Term Water-Use Efficiency of Haloxylon Plantations on the Dried Aral Sea Bed
	Khamzina, Asia 1; An, Jiae 2; Chang, Hanna 1; Son, Yowhan 1
通讯作者	Khamzina, Asia
来源期刊	WATER
EISSN	2073-4441
出版年	2020
卷号	12 期号:1
英文摘要	The desiccation of the Aral Sea due to water withdrawal from contributing rivers has resulted in an unprecedented change in the region's climate, from maritime to hot dry desert. Afforestation has been implemented on the desiccated seafloor-the Aralkum Desert-for stabilizing the exposed substrate. However, studies on the long-term status of the afforested sites are limited. Here, we examined C and N isotopic signatures in Haloxylon aphyllum plantations, as indicators of time-integrated plant response to the prevalent water and salinity constraints, in northern Aralkum, Kazakhstan. Foliar C-13 composition analysis in a chronosequence of H. aphyllum plantation sites (aged 1-27 years) on the sandy substrate revealed a significant trend towards higher water-use efficiency in older plantations, possibly in response to declining water availability. A lack of correlation between plant C-13 signature and soil electrical conductivity suggests no history of salt stress despite the saline environment. Furthermore, N-15 enrichment in plant tissue in the water-limited Aralkum ecosystem indicates the relative openness of N cycling. There was an increase in species richness and self-propagation at the plot scale, indicating successful afforestation effort. Coupled with other approaches, isotope discrimination might elucidate mechanisms underlying stress tolerance in H. aphyllum, which could support the afforestation efforts.
英文关键词	afforestation Aralkum Central Asia saksaul C-13 N-15
类型	Article
语种	英语
国家	South Korea
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000519847200099
WOS关键词	PHYTOMELIORATION ; DISCRIMINATION ; STRESS ; SALT ; C-13 ; C-3
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315700
作者单位	1.Korea Univ, Dept Environm Sci & Ecol Engn, 145 Anam Ro, Seoul 02841, South Korea; 2.Natl Inst Ecol, Div Restorat Res, Yeongyang 36531, South Korea
推荐引用方式 GB/T 7714	Khamzina, Asia,An, Jiae,Chang, Hanna,et al. Isotopic Signatures as an Indicator of Long-Term Water-Use Efficiency of Haloxylon Plantations on the Dried Aral Sea Bed[J],2020,12(1).
APA	Khamzina, Asia,An, Jiae,Chang, Hanna,&Son, Yowhan.(2020).Isotopic Signatures as an Indicator of Long-Term Water-Use Efficiency of Haloxylon Plantations on the Dried Aral Sea Bed.WATER,12(1).
MLA	Khamzina, Asia,et al."Isotopic Signatures as an Indicator of Long-Term Water-Use Efficiency of Haloxylon Plantations on the Dried Aral Sea Bed".WATER 12.1(2020).