干旱区生态环境知识资源中心(Arid): Exploring grassland ecosystem water use efficiency using indicators of precipitation and soil moisture across the Mongolian Plateau

Arid

DOI	10.1016/j.ecolind.2022.109207
	Exploring grassland ecosystem water use efficiency using indicators of precipitation and soil moisture across the Mongolian Plateau
	Liu, Xinyi; Lai, Quan; Yin, Shan; Bao, Yuhai; Qing, Song; Bayarsaikhan, Sainbuyan; Bu, Lingxin; Mei, Li; Li, Zhiru; Niu, Jialong; Yang, Yumeng
通讯作者	Lai, Q
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2022
卷号	142
英文摘要	Grassland ecosystem dominates in the Mongolian Plateau, mostly located in its arid and semi-arid regions. Although the ecosystem is an important source for agriculture, it is also a fragile system ecologically. This system is one of the most sensitive areas to global climate change. Precipitation (PPT) and soil moisture (SM) are important water sources in the grassland ecosystem, and their changes would greatly affect vegetation growth. This paper generates the precipitation use efficiency (PUE) and soil water use efficiency (SWUE) of Mongolian Plateau grassland based on multi-source remote sensing data to investigate the spatio-temporal distribution pattern and identify the driving factors. Results showed four main findings. Firstly, two water use efficiency (WUE) indicators show a generally increasing trend from 2000 to 2018, with average PUE and SWUE 1.07 gCmiddotm(-2)middotmm(-1) and 1.03 gC/kgmiddotH(2)O, respectively. They have similar spatial distribution patterns, consistent with the available water resources, decreasing from northeast to southwest. However, grassland vegetation growth is more sensitive to soil moisture than precipitation, and the dynamic change of SWUE is smoother and more significant than PUE. Secondly, due to the higher species richness, better vegetation biological characteristics and less severe growth environment, meadow grassland has the highest PUE and SWUE, followed by typical grassland and desert steppe. Thirdly, PUE and SWUE are relatively low in extremely arid and humid regions. In areas with relatively moderate water conditions (PPT in 148-360?mm, SM in 0.14-0.35?cm(3)/cm(3)), two indicators increase with the abundance of moisture conditions and reach the maximum. Fourthly, there is a positive linear relationship between PUE (SWUE) with precipitation and a unimodal correlation between PUE (SWUE) with temperature across the entire grassland. However, a varying correlation exists in different grassland ecosystems, especially meadow grassland. Together with analyzing past and future trends, this study provides strong evidence to reflect the impact of global climate change and the management and protection of the grassland ecosystems in arid and semi-arid regions.
英文关键词	Precipitation use efficiency Soil water use efficiency Precipitation Soil moisture MongolianPlateau's grasslands
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000859332200003
WOS关键词	INDUCED CHLOROPHYLL FLUORESCENCE ; SPATIOTEMPORAL PATTERNS ; PRIMARY PRODUCTIVITY ; SEMIARID REGIONS ; VARIABILITY ; VEGETATION ; DYNAMICS ; TEMPERATURE ; GRADIENT ; CHINA
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392331
推荐引用方式 GB/T 7714	Liu, Xinyi,Lai, Quan,Yin, Shan,et al. Exploring grassland ecosystem water use efficiency using indicators of precipitation and soil moisture across the Mongolian Plateau[J],2022,142.
APA	Liu, Xinyi.,Lai, Quan.,Yin, Shan.,Bao, Yuhai.,Qing, Song.,...&Yang, Yumeng.(2022).Exploring grassland ecosystem water use efficiency using indicators of precipitation and soil moisture across the Mongolian Plateau.ECOLOGICAL INDICATORS,142.
MLA	Liu, Xinyi,et al."Exploring grassland ecosystem water use efficiency using indicators of precipitation and soil moisture across the Mongolian Plateau".ECOLOGICAL INDICATORS 142(2022).