干旱区生态环境知识资源中心(Arid): Vegetation photosynthesis changes and response to water constraints in the Yangtze River and Yellow River Basin, China

Arid

DOI	10.1016/j.ecolind.2022.109331
	Vegetation photosynthesis changes and response to water constraints in the Yangtze River and Yellow River Basin, China
	Zhao, Anzhou; Wang, Dongli; Xiang, Kaizheng; Zhang, Anbing
通讯作者	Zhao, AZ
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2022
卷号	143
英文摘要	Satellite remotely sensed solar-induced chlorophyll fluorescence (SIF) is an effective index for detecting the ecosystem-level photosynthetic capacity, yet it remains poorly understood how vegetation photosynthesis responds to water constraints. This study determined the spatial-temporal changes and water constraints on vegetation photosynthesis based on the Self-Calibrated Palmer Drought Severity Index (scPDSI), Standardized Precipitation Evapotranspiration Index (SPEI) and global Orbiting Carbon Observatory-2 SIF (GOSIF) data in the Yangtze River and Yellow River basin between 2000 and 2018. The results showed that annual maximum GOSIF steadily increased across the whole basin (slope = 0.0031 W m(-2)mu m(-1)sr(-1)a(-1), P < 0.001). The maximum increasing trend was found in the semi-arid region (0.0034 W m(-)2 mu m(-1)sr(-1)a(-1), P < 0.001). The highest value of annual maximum GOSIF was found in the Qinling-Daba Mountains along with Hengduan Mountain. The lowest GOSIF was found in the western portions of the Loess Plateau and the source region of Yangtze River and Yellow River. Positive correlations between satellite GOSIF and water availability were particularly strong in the Loess Plateaus; in contrast, negative correlations were found in the Hengduan Mountains. The area of water deficit displayed a significant trend towards expansion (slope = 1.539 % a(-1 )and 0.898 % a(-1), P < 0.05), while water surplus areas significantly shrank (slope = 0.847 % a(-1) and 0.584 % a(-1), P < 0.05) in the Yangtze River and Yellow River basin. Atmospheric CO2 concentration and precipitation were the dominant drivers for the water deficit regions, while atmospheric CO2 concentration and temperature were the dominant drivers for the water surplus regions. This study emphasizes the effect of water constraints on regional vegetation photosynthesis under global warming conditions and patterns of greening.
英文关键词	Solar-induced chlorophyll fluorescence Water availability indices Change trend Yangtze River and Yellow River basin, China
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:000862829800007
WOS关键词	INDUCED CHLOROPHYLL FLUORESCENCE ; GROSS PRIMARY PRODUCTIVITY ; LOESS PLATEAU ; USE EFFICIENCY ; CLIMATE-CHANGE ; TRENDS ; PRECIPITATION ; PATTERNS ; IMPACTS ; REGION
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/2XILL650/392339
推荐引用方式 GB/T 7714	Zhao, Anzhou,Wang, Dongli,Xiang, Kaizheng,et al. Vegetation photosynthesis changes and response to water constraints in the Yangtze River and Yellow River Basin, China[J],2022,143.
APA	Zhao, Anzhou,Wang, Dongli,Xiang, Kaizheng,&Zhang, Anbing.(2022).Vegetation photosynthesis changes and response to water constraints in the Yangtze River and Yellow River Basin, China.ECOLOGICAL INDICATORS,143.
MLA	Zhao, Anzhou,et al."Vegetation photosynthesis changes and response to water constraints in the Yangtze River and Yellow River Basin, China".ECOLOGICAL INDICATORS 143(2022).