Long-term trend and interannual variability of precipitation-use efficiency in Eurasian grasslands

doi:10.1016/j.ecolind.2021.108091

	Long-term trend and interannual variability of precipitation-use efficiency in Eurasian grasslands
	Zhang, Tianyou 1,2; Chen, Zhi 1,2; Zhang, Weikang 1; Jiao, Cuicui 3; Yang, Meng 1,2; Wang, Qiufeng 1,2; Han, Lang 1,2; Fu, Zheng 4; Sun, Zhongyi 5; Li, Wenhua 1
刊名	ECOLOGICAL INDICATORS
	2021-11-01
卷号	130 页码:8
关键词	Precipitation-use efficiency Trend Climate change Interannual variation Eurasian grasslands
ISSN号	1470-160X
DOI	10.1016/j.ecolind.2021.108091
通讯作者	Yu, Guirui(yugr@igsnrr.ac.cn)
英文摘要	Precipitation-use efficiency (PUE) is an important ecosystem indicator of the efficiency of carbon-water conversion. The trend and interannual variation of precipitation-use efficiency (PUE) response to climatic factors provide a theoretical foundation for understanding how Eurasian grasslands adapt to climate change. However, the long-term trends and regulating factors of PUE in Eurasian grasslands at the continental scale are still unclear. Here, we integrated long-term Global Inventory Monitoring and Modeling System (GIMMS) Normalized Difference Vegetation Index (NDVI), field surveys of aboveground net primary production (ANPP) and meteorological datasets during 1982-2015 to reveal the temporal variations and controls of PUE in Eurasian grasslands. We found that there was an overall uptrend of PUE (3 x 10-3 g C m- 2 mm- 1/10 yr) in Eurasian grasslands. The greatest increasing trends of PUE was found in forest steppe at the rate of 13 x 10-3 g C m- 2 mm- 1/10 yr, while greatest decreasing trend presented in alpine steppe at the rate of -2.6 x 10-3 g C m- 2 mm- 1/10 yr. The PUE showed linearly decreasing patterns with precipitation at the biome and continental scales, while it was uncorrelated with temperature at the continental scale and showed diverse patterns of linear increase, concavedown and no correlation with temperature for different biomes. The temporal variation of PUE was mainly controlled by precipitation in Eurasian grasslands. This result further revealed that climatic factors shaped the temporal pattern of PUE by the cascading effects networks of climatic factors (precipitation and temperature) vapor pressure deficit (VPD) - leaf area index (LAI) - ANPP - PUE (CVLP-CENet). This study identified the longterm trends, interannual variations and controls of PUE in Eurasian grasslands over the past three decades, and provided crucial insights into understanding grassland ecosystems dynamics and response to climate change.
资助项目	National Key Research and Develop-ment Program of China[2016YFA0600104] ; National Natural Sci-ence Foundation of China[41991234] ; National Natural Sci-ence Foundation of China[31800406] ; International Partnership Program of Chinese Academy of Sciences[121311KYSB20170004]
WOS关键词	NET PRIMARY PRODUCTIVITY ; RAIN USE EFFICIENCY ; WATER-USE EFFICIENCY ; SEMIARID ECOSYSTEMS ; CLIMATE ; TEMPERATURE ; RESPONSES ; BIOMES ; CHINA
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000692570600004
资助机构	National Key Research and Develop-ment Program of China ; National Natural Sci-ence Foundation of China ; International Partnership Program of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/165470]
专题	中国科学院地理科学与资源研究所
通讯作者	Yu, Guirui
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, 11A Datun Rd, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 3.Sichuan Univ Sci & Engn, Coll Econ, Yibin 644000, Peoples R China 4.Lab Sci Climat & Environm, F-91191 Gif Sur Yvette, France 5.Hainan Univ, Coll Ecol & Environm, Haikou 570228, Hainan, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Tianyou,Chen, Zhi,Zhang, Weikang,et al. Long-term trend and interannual variability of precipitation-use efficiency in Eurasian grasslands[J]. ECOLOGICAL INDICATORS,2021,130:8.
APA	Zhang, Tianyou.,Chen, Zhi.,Zhang, Weikang.,Jiao, Cuicui.,Yang, Meng.,...&Yu, Guirui.(2021).Long-term trend and interannual variability of precipitation-use efficiency in Eurasian grasslands.ECOLOGICAL INDICATORS,130,8.
MLA	Zhang, Tianyou,et al."Long-term trend and interannual variability of precipitation-use efficiency in Eurasian grasslands".ECOLOGICAL INDICATORS 130(2021):8.