干旱区生态环境知识资源中心(Arid): Linking diffuse radiation and ecosystem productivity of a desert steppe ecosystem

Arid

DOI	10.7717/peerj.9043
	Linking diffuse radiation and ecosystem productivity of a desert steppe ecosystem
	Li, Cheng 1,2; Jia, Xin 1,2; Ma, Jingyong 1,2; Liu, Peng 1,2; Yan, Ruizhi 1,2; Bai, Yujie 1,2; Hayat, Muhammad 1,2; Liu, Jinglan 3; Zha, Tianshan 1,2
通讯作者	Liu, Jinglan
来源期刊	PEERJ
ISSN	2167-8359
出版年	2020
卷号	8
英文摘要	Radiation components have distinct effects on photosynthesis. In the desert steppe ecosystem, the influence of diffuse radiation on carbon fixation has not been thoroughly explored. We examined this diffusion and its effect on ecosystem productivity was examined during the growing season from 2014 to 2015 on the basis of eddy covariance measurements of CO2 exchange in a desert steppe ecosystem in northwest China. Our results indicated that the gross ecosystem production (GEP) and diffuse photosynthetically active radiation (PAR(dif)) peaked when the clearness index (CI) was around 0.5. The maximum canopy photosynthesis (P-max) under cloudy skies (CI < 0.7) was 23.7% greater than under clear skies (CI >= 0.7). When the skies became cloudy in the desert steppe ecosystem, PAR(dif) had a greater effect on GEP. Additionally, lower vapor pressure deficits (VPD <= 1 kPa), lower air temperatures (T-a <= 20 degrees C), and non-stressed water conditions (REW >= 0.4) were more conducive for enhanced ecosystem photosynthesis under cloudy skies than under clear skies. This may be due to the comprehensive effects of VPD and T-a on stomatal conductance. We concluded that cloudiness can influence diffuse radiation components and that diffuse radiation can increase the ecosystem production of desert steppe ecosystems in northwest China.
英文关键词	Diffuse radiation Clearness index Gross ecosystem production Desert steppe ecosystem
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000530161100010
WOS关键词	CARBON-DIOXIDE EXCHANGE ; LIGHT-USE EFFICIENCY ; WATER-USE EFFICIENCY ; GROSS PRIMARY PRODUCTION ; NET ECOSYSTEM ; CO2 EXCHANGE ; STOMATAL CONDUCTANCE ; SEMIARID SHRUBLAND ; MAIZE CROPLAND ; FOREST
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319059
作者单位	1.Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Beijing, Peoples R China; 2.Beijing Forestry Univ, Key Lab State Forestry Adm Soil & Water Conservat, Beijing, Peoples R China; 3.Beijing Forestry Univ, Sch Ecol & Nat Conservat, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Li, Cheng,Jia, Xin,Ma, Jingyong,et al. Linking diffuse radiation and ecosystem productivity of a desert steppe ecosystem[J]. 北京林业大学,2020,8.
APA	Li, Cheng.,Jia, Xin.,Ma, Jingyong.,Liu, Peng.,Yan, Ruizhi.,...&Zha, Tianshan.(2020).Linking diffuse radiation and ecosystem productivity of a desert steppe ecosystem.PEERJ,8.
MLA	Li, Cheng,et al."Linking diffuse radiation and ecosystem productivity of a desert steppe ecosystem".PEERJ 8(2020).