干旱区生态环境知识资源中心(Arid): Effects of precipitation and temperature on precipitation use efficiency of alpine grassland in Northern Tibet, China

Arid

DOI	10.1038/s41598-020-77208-6
	Effects of precipitation and temperature on precipitation use efficiency of alpine grassland in Northern Tibet, China
	Zhang, Xiaoke; Du, Xindong; Zhu, Zhangming
通讯作者	Zhu, ZM
来源期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
出版年	2020
卷号	10 期号:1
英文摘要	Precipitation use efficiency (PUE) is crucial in understanding the coupling between ecosystem carbon and water cycling. In this study, we used a time series (2000-2013) dataset of net primary productivity (NPP) based on the Carnegie-Ames-Stanford Approach (CASA) model together with precipitation to reveal the spatial and temporal patterns of alpine grassland PUE in Northern Tibet. The mean annual PUE values of alpine meadow, alpine meadow steppe, alpine steppe, alpine desert steppe, and alpine desert were 0.48, 0.39, 0.36, 0.29 and 0.23 gc m(-2) mm(-1), respectively. The spatial patterns of PUE of alpine grassland demonstrated an initial increase in the arid region and a subsequent decrease in the humid region along the precipitation gradient and peaked at approximately 500 mm. To evaluate the temporal patterns, the sensitivity Slope and the Pearson correlation coefficient Rxy between the PUE and climatic factors were calculated. The inter-annual variability of PUE exhibited a significant negative correlation with annual precipitation (P<0.05), which implies that NPP had a lower sensitivity to precipitation in most regions. The relationship between PUE and the mean annual temperature is different for different regions. Our findings have an important role in understanding the impacts of precipitation availability on climate change and in the scientific management of the alpine grassland ecosystems.
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000594658100030
WOS关键词	NET PRIMARY PRODUCTIVITY ; RAIN-USE EFFICIENCY ; INTERANNUAL VARIABILITY ; CLIMATE ; ECOSYSTEMS ; RESPONSES ; PATTERNS ; PLATEAU ; DYNAMICS ; GRADIENT
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
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/2XILL650/327791
作者单位	[Zhang, Xiaoke; Du, Xindong] Hohai Univ, Sch Publ Adm, Nanjing 210098, Peoples R China; [Zhu, Zhangming] Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650091, Yunnan, Peoples R China; [Zhu, Zhangming] Yunnan Univ, Yunnan Key Lab Plateau Mt Ecol & Restorat Degrade, Kunming 650091, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xiaoke,Du, Xindong,Zhu, Zhangming. Effects of precipitation and temperature on precipitation use efficiency of alpine grassland in Northern Tibet, China[J]. 河海大学,2020,10(1).
APA	Zhang, Xiaoke,Du, Xindong,&Zhu, Zhangming.(2020).Effects of precipitation and temperature on precipitation use efficiency of alpine grassland in Northern Tibet, China.SCIENTIFIC REPORTS,10(1).
MLA	Zhang, Xiaoke,et al."Effects of precipitation and temperature on precipitation use efficiency of alpine grassland in Northern Tibet, China".SCIENTIFIC REPORTS 10.1(2020).