干旱区生态环境知识资源中心(Arid): Evaluating the responses of net primary productivity and carbon use efficiency of global grassland to climate variability along an aridity gradient

Arid

DOI	10.1016/j.scitotenv.2018.10.295
	Evaluating the responses of net primary productivity and carbon use efficiency of global grassland to climate variability along an aridity gradient
	Liu, Yangyang 1; Yang, Yue 2; Wang, Qian 1; Du, Xiaolong 1; Li, Jianlong 1; Gang, Chengcheng 3; Zhou, Wei 4; Wang, Zhaoqi 5
通讯作者	Li, Jianlong
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2019
卷号	652 页码:671-682
英文摘要	Net primary productivity (NPP) and carbon use efficiency (CUE) are common ecological indicators for assessing the terrestrial carbon cycle. However, despite their widespread use, considerable uncertainties exist toward the response patterns of NPP and CUE to climate variability along an aridity gradient, especially for grassland ecosystems. The aridity index (AI) was calculated in this study to specify arid-humid zones across the global grassland ecosystem. The dynamics of grassland NPP, CUE, and their dependence on climate under different AI levels from 2000 to 2013 were investigated. Results showed that the NPP and CUE of grasslands demonstrated a slightly increasing trend with regional increasing precipitation in most AI zones, except for arid regions (AR) from 2000 to 2013. The NPP and CUE of grasslands exhibited a remarkable spatial heterogeneity in different AI zones. High NPP values mainly occurred in the dry and sub-humid (DSH) and humid (HU) regions of Southern Hemisphere with warm and wet climate. High CUE values were mostly found in the HU of the Northern Hemisphere with cold and wet climate. In addition, low NPP and CUE values were observed in most parts of AR and semi-AR (SAR) with hot and dry climate. Overall, the NPP and CUE of grasslands were significantly affected by precipitation at the global scale. Specifically, grassland NPP was positively correlated with the mean annual precipitation (MAP) in SAR and AR, but negatively related with the MAP in the HU region. The positive correlation between NPP and mean annual temperature (MAT) was found only for HU regions. Grassland CUE indicated a positive relation with MAP, but a negative relation was observed with MAT in all AI zones. The correlation coefficients between CUE and MAP decreased from AR to HU regions. This finding indicated that grassland CUE was highly sensitive to precipitation in dry areas, but this relationship weakened in HU ecosystems. (C) 2018 Elsevier B.V. All rights reserved.
英文关键词	Aridity index Net primary productivity (NPP) Carbon use efficiency (CUE) Climate variability Grassland ecosystems
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000454418500062
WOS关键词	WATER-USE EFFICIENCY ; TIBETAN PLATEAU ; DRIVING FORCES ; PINUS-RADIATA ; RESPIRATION ; DROUGHT ; CHINA ; VEGETATION ; ECOSYSTEM ; SEQUESTRATION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	西北农林科技大学 ; 北京大学 ; 南京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218624
作者单位	1.Nanjing Univ, Sch Life Sci, Dept Ecol, Xianlin Rd 163, Nanjing 210046, Jiangsu, Peoples R China; 2.Nanjing Inst Environm Sci, Minist Environm Protect Peoples Republ China, Nanjing 210042, Jiangsu, Peoples R China; 3.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China; 4.Chongqing Jiaotong Univ, Coll Architecture & Urban Planning, Chongqing 400074, Peoples R China; 5.Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yangyang,Yang, Yue,Wang, Qian,et al. Evaluating the responses of net primary productivity and carbon use efficiency of global grassland to climate variability along an aridity gradient[J]. 西北农林科技大学, 北京大学, 南京大学,2019,652:671-682.
APA	Liu, Yangyang.,Yang, Yue.,Wang, Qian.,Du, Xiaolong.,Li, Jianlong.,...&Wang, Zhaoqi.(2019).Evaluating the responses of net primary productivity and carbon use efficiency of global grassland to climate variability along an aridity gradient.SCIENCE OF THE TOTAL ENVIRONMENT,652,671-682.
MLA	Liu, Yangyang,et al."Evaluating the responses of net primary productivity and carbon use efficiency of global grassland to climate variability along an aridity gradient".SCIENCE OF THE TOTAL ENVIRONMENT 652(2019):671-682.