Human activity impacts on the stem radial growth of Populus euphratica riparian forests in China's Ejina Oasis, using tree-ring analysis

doi:10.1016/j.ejsobi.2017.02.004

	Human activity impacts on the stem radial growth of Populus euphratica riparian forests in China's Ejina Oasis, using tree-ring analysis
	Peng, Xiaomei 1; Xiao, Shengchun ; Cheng, Guodong ; Xiao, Honglang ; Tian, Quanyan 1; Zhang, Qibing2
	2017
发表期刊	TREES-STRUCTURE AND FUNCTION
ISSN	0931-1890
卷号	31 期号:2 页码:379-392
摘要	Over the last several decades, riparian forests in Northwest China have been extremely vulnerable to the increasing pressures from human activity and climate change. However, it is unclear how forests correlate with these influences over time and on a wide scale. In the present study, we developed 28 tree-ring chronologies of Populus euphratica in the Ejina Oasis, in the lower reaches of Northwestern China's Heihe River, to evaluate the oasisscale riparian forest growth variation and its correlation with the runoff regulation. We identified three hydrologic periods using regime-shift analysis: a natural runoff period from 1954 to 1989, when the oasis was sustained by natural river flows; a degradation period from 1990 to 2002, when excessive upstream withdrawals of runoff decreased flows to the oasis; and a recovery period, from 2003 to 2010, when water allocation projects restored flows. In general, stem radial growth of poplar trees in the oasis showed decreasing and increasing trends in the degradation period and recovery period, respectively, with high spatial heterogeneity in each period. Our analysis of the relationship between the chronologies and corresponding hydrologic and climatic data revealed that the runoff-recharged hyporheic groundwater depth was the major factor that limited tree stem radial growth. Thus, it is important to allocate water between the middle and lower reaches, and inside the lower reaches, to mitigate or prevent the adverse effects of low runoff. Our study also demonstrates that researchers must carefully consider the high spatial heterogeneity during dendrochronological research in an arid riparian forest.
关键词	Riparian forest Radial growth heterogeneity Heihe River Water allocation projects
学科领域	Environmental Sciences & Ecology ; Agriculture
DOI	10.1016/j.ejsobi.2017.02.004
收录类别	SCI
语种	英语
WOS关键词	HEIHE RIVER-BASIN ; LOWER REACHES ; GROUNDWATER LEVEL ; WATER-USE ; NORTHWESTERN CHINA ; VEGETATION ; TEMPERATURE ; CLIMATE ; RESPONSES ; DECLINE
WOS记录号	WOS:000399851100005
出版者	SPRINGER HEIDELBERG
文献子类	Article
出版地	HEIDELBERG
EISSN	1432-2285
资助机构	Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [91125026, 41471082] ; STS Project of the Chinese Academy of Sciences [KFJ-EW-STS-00502]
作者邮箱	xiaosc@lzb.ac.cn
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/22145
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Cold & Arid Regions Environm & Engn Res Inst, Key Lab Ecohydrol Inland River Basin, Donggang West Rd 320, Lanzhou 730000, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Peng, Xiaomei,Xiao, Shengchun,Cheng, Guodong,et al. Human activity impacts on the stem radial growth of Populus euphratica riparian forests in China's Ejina Oasis, using tree-ring analysis[J]. TREES-STRUCTURE AND FUNCTION,2017,31(2):379-392.
APA	Peng, Xiaomei,Xiao, Shengchun,Cheng, Guodong,Xiao, Honglang,Tian, Quanyan,&Zhang, Qibing.(2017).Human activity impacts on the stem radial growth of Populus euphratica riparian forests in China's Ejina Oasis, using tree-ring analysis.TREES-STRUCTURE AND FUNCTION,31(2),379-392.
MLA	Peng, Xiaomei,et al."Human activity impacts on the stem radial growth of Populus euphratica riparian forests in China's Ejina Oasis, using tree-ring analysis".TREES-STRUCTURE AND FUNCTION 31.2(2017):379-392.

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