干旱区生态环境知识资源中心(Arid): Analysis on water use efficiency of Populus euphratica forest ecosystem in arid area

Arid

DOI	10.1007/s00704-021-03636-7
	Analysis on water use efficiency of Populus euphratica forest ecosystem in arid area
	Xue, Lianqing; Fu, Fangbing; Chen, Xinfang; Liu, Yuanhong; Han, Qiang; Liao, Shumin; Wei, Qing
通讯作者	Fu, FB (corresponding author), Hohai Univ, Coll Hydrol & Water Resources, Nanjing 210098, Peoples R China.
来源期刊	THEORETICAL AND APPLIED CLIMATOLOGY
ISSN	0177-798X
EISSN	1434-4483
出版年	2021
卷号	145 期号:1-2 页码:717-730
英文摘要	Water use efficiency (WUE, the ratio of gross primary productivity (GPP) to evapotranspiration (ET)) reflects the coupled relationship between water loss and carbon gain in the process of plant photosynthetic carbon assimilation. As a dominant tree species in arid area, Populus euphratica plays an important ecological role in slowing desertification. Here, continuous observations of carbon, water, and energy fluxes were carried out in Populus euphratica forest with eddy covariance (EC) technique in 2018. We systematically explained the variation characteristics of energy fluxes and WUE at different time scales, and explored the main controlling factors of WUE in drought-stressed environment based on the synchronous meteorological data. Results showed that the carbon exchange of the Populus euphratica forest ecosystem occurred mainly during the growing seasons (April-October). During this period, the entire ecosystem appeared as a carbon sink with the potential to sequester atmospheric carbon dioxide. The average daily WUE was 2.2 g C/kg H2O, which was lower than other temperate forests (2.57-6.07 g C/kg H2O) but higher than grassland, wetland, and cropland. We also concluded that an increase in carbon dioxide concentration (CCO2) and air relative humidity (RH) could promote the increase of WUE. Nevertheless, WUE was negatively correlated with air temperature (Ta), photosynthetically active radiation (PAR), and normalized difference vegetation index (NDVI). Additionally, WUE increased under moderate soil water content (SWC), but decreased due to the continuously rising SWC. WUE was more strongly affected by factors affecting water consumption than carbon uptake. Under the conditions of high temperature, strong radiation and low humidity in the summer, the growth rate of ET was much larger than that of GPP. This study not only contributes to our understanding of the carbon, water, and energy dynamics of the Populus euphratica forest ecosystem but also provides an important reference for ecological conservation and ecological restoration in arid regions.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000652947900001
WOS关键词	CARBON USE EFFICIENCY ; EDDY-COVARIANCE ; TERRESTRIAL ECOSYSTEMS ; ENERGY-BALANCE ; ASPEN FOREST ; TARIM RIVER ; PLANTATION ; DIOXIDE ; DYNAMICS ; EXCHANGE
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	河海大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351889
作者单位	[Xue, Lianqing; Fu, Fangbing; Chen, Xinfang; Liu, Yuanhong; Han, Qiang; Liao, Shumin; Wei, Qing] Hohai Univ, Coll Hydrol & Water Resources, Nanjing 210098, Peoples R China; [Xue, Lianqing] Hohai Univ, Wentian Coll, Maanshan 243000, Peoples R China; [Xue, Lianqing] Shihezi Univ, Shihezi 832009, Peoples R China
推荐引用方式 GB/T 7714	Xue, Lianqing,Fu, Fangbing,Chen, Xinfang,et al. Analysis on water use efficiency of Populus euphratica forest ecosystem in arid area[J]. 河海大学,2021,145(1-2):717-730.
APA	Xue, Lianqing.,Fu, Fangbing.,Chen, Xinfang.,Liu, Yuanhong.,Han, Qiang.,...&Wei, Qing.(2021).Analysis on water use efficiency of Populus euphratica forest ecosystem in arid area.THEORETICAL AND APPLIED CLIMATOLOGY,145(1-2),717-730.
MLA	Xue, Lianqing,et al."Analysis on water use efficiency of Populus euphratica forest ecosystem in arid area".THEORETICAL AND APPLIED CLIMATOLOGY 145.1-2(2021):717-730.