干旱区生态环境知识资源中心(Arid): Environmental factors modulate the diffuse fertilization effect on gross primary productivity across Chinese ecosystems

Arid

DOI	10.1016/j.scitotenv.2021.148443
	Environmental factors modulate the diffuse fertilization effect on gross primary productivity across Chinese ecosystems
	Gui, Xuan; Wang, Lunche; Su, Xin; Yi, Xiuping; Chen, Xinxin; Yao, Rui; Wang, Shaoqiang
通讯作者	Wang, LC (corresponding author), China Univ Geosci, Sch Geog & Informat Engn, Key Lab Reg Ecol & Environm Change, Wuhan 430074, Peoples R China. ; Wang, LC (corresponding author), China Univ Geosci, Sch Geog & Informat Engn, Hubei Key Lab Crit Zone Evolut, Wuhan 430074, Peoples R China.
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2021
卷号	793
英文摘要	Diffuse radiation allocated by cloud cover and aerosols can promote vegetation photosynthesis, which is known as the diffuse fertilization effect (DFE). As an important uncertain factor regulating the DFE, understanding the role of environmental conditions in the response of terrestrial ecosystems to diffuse radiation is vital for quantitative and intensive studies. By using a light use efficiency model and statistical methods with satellite data and ChinaFLUX observation data, the optimal environmental range of DFE was estimated, the indirect role of vapor pressure deficit (VPD) and air temperature (T-a) on DFE was explored, and the relative contribution of diffuse photosynthetically active radiation (PAR(dif)) on gross primary productivity (GPP) was analyzed across Chinese ecosystems under different sky conditions. The results showed that the DFE increased with leaf area index (LAI), but distributed a unimodal curve along with VPD and T-a, both of which had an optimum range that was lower in the forest (or cropland) and higher in the grass (or desert) ecosystem. When considering the co-effect of VPD and T-a, the strongest positive effect of DFE was found at 0-5 h Pa and 20-25 degrees C. Based on path analysis, PAR(dif) promoted GPP and served as the main controlling factor in forest ecosystems predominantly through a direct pathway from half-hourly to the daily scale, while T-a and VPD occupied the dominant position at single canopy ecosystem sites. When the aerosol optical depth (AOD) increased, the relative contribution of PARdif increased in multiple-canopy ecosystems and decreased in single-canopy ecosystems; when the sky conditions changed from sunny to cloudy, the relative contribution of PAR(dif) was higher in the forest ecosystem and increased significantly in the grass ecosystem. These findings offer a more comprehensive understanding of the environmental effects of regulating DFE on GPP across ecosystems. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	Diffuse fertilization effect GPP Environmental factors Sky conditions Path analysis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000691588400015
WOS关键词	LIGHT-USE EFFICIENCY ; CARBON-DIOXIDE EXCHANGE ; PHOTOSYNTHETICALLY ACTIVE RADIATION ; WATER-USE EFFICIENCY ; NET ECOSYSTEM ; TERRESTRIAL ECOSYSTEMS ; CANOPY PHOTOSYNTHESIS ; ATMOSPHERIC PARTICLES ; PLANT PRODUCTIVITY ; SOLAR-RADIATION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364577
作者单位	[Gui, Xuan; Wang, Lunche; Su, Xin; Yi, Xiuping; Chen, Xinxin; Yao, Rui; Wang, Shaoqiang] China Univ Geosci, Sch Geog & Informat Engn, Key Lab Reg Ecol & Environm Change, Wuhan 430074, Peoples R China; [Gui, Xuan; Wang, Lunche; Su, Xin; Yi, Xiuping; Chen, Xinxin; Yao, Rui; Wang, Shaoqiang] China Univ Geosci, Sch Geog & Informat Engn, Hubei Key Lab Crit Zone Evolut, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Gui, Xuan,Wang, Lunche,Su, Xin,et al. Environmental factors modulate the diffuse fertilization effect on gross primary productivity across Chinese ecosystems[J],2021,793.
APA	Gui, Xuan.,Wang, Lunche.,Su, Xin.,Yi, Xiuping.,Chen, Xinxin.,...&Wang, Shaoqiang.(2021).Environmental factors modulate the diffuse fertilization effect on gross primary productivity across Chinese ecosystems.SCIENCE OF THE TOTAL ENVIRONMENT,793.
MLA	Gui, Xuan,et al."Environmental factors modulate the diffuse fertilization effect on gross primary productivity across Chinese ecosystems".SCIENCE OF THE TOTAL ENVIRONMENT 793(2021).