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Disentangling Climate and LAI Effects on Seasonal Variability in Water Use Efficiency Across Terrestrial Ecosystems in China

文献类型：期刊论文

作者Li, Yue1,2; Shi, Hao3; Zhou, Lei4; Eamus, Derek5,6; Huete, Alfredo5; Li, Longhui5; Cleverly, James5,6; Hu, Zhongmin7; Harahap, Mahrita5; Yu, Qiang3,5
刊名JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
出版日期2018-08-01
卷号123期号:8页码:2429-2443
ISSN号2169-8953
DOI10.1029/2018JG004482
通讯作者Shi, Hao(yuren2006@gmail.com) ; Wang, Shaoqiang(sqwang@igsnrr.ac.cn)
英文摘要Water use efficiency (WUE), the ratio of gross primary productivity (GPP) over evapotranspiration (ET), is a critical ecosystem function. However, it is difficult to distinguish the individual effects of climatic variables and leaf area index (LAI) on WUE, mainly due to the high collinearity among these factors. Here we proposed a partial least squares regression-based sensitivity algorithm to confront the issue, which was first verified at seven ChinaFlux sites and then applied across China. The results showed that across all biomes in China, monthly GPP (0.42-0.65), ET (0.33-0.56), and WUE (0.01-0.31) showed positive sensitivities to air temperature, particularly in croplands in northeast China and forests in southwest China. Radiation exerted stronger effects on ET (0.55-0.78) than GPP (0.19-0.65), resulting in negative responses (-0.44 to 0.04) of WUE to increased radiation among most biomes. Increasing precipitation stimulated both GPP (0.06-0.17) and ET (0.05-0.12) at the biome level, but spatially negative effects of excessive precipitation were also found in some grasslands. Both monthly GPP (-0.01 to 0.29) and ET (0.02-0.12) showed weak or moderate responses to vapor pressure deficit among biomes, resulting in weak response of monthly WUE to vapor pressure deficit (-0.04 to 0.08). LAI showed positive effects on GPP (0.18-0.60), ET (0-0.23), and WUE (0.13-0.42) across biomes, particularly on WUE in grasslands (0.42 +/- 0.30). Our results highlighted the importance of LAI in influencing WUE against climatic variables. Furthermore, the sensitivity algorithm can be used to inform the design of manipulative experiments and compare with factorial simulations for discerning effects of various variables on ecosystem functions.
WOS关键词LEAF-AREA INDEX ; HIGHER STOMATAL CONDUCTANCE ; VAPOR-PRESSURE DEFICIT ; CHANGE-TYPE DROUGHT ; EDDY COVARIANCE ; TREE MORTALITY ; CARBON-DIOXIDE ; RAIN-FOREST ; BIOCHEMICAL LIMITATIONS ; GRASSLAND ECOSYSTEMS
资助项目Ministry of Science and Technology of China[2016YFA0600202] ; Northwest A & F University of China[A314021403-C4] ; National Natural Science Foundation of China[41571192] ; National Natural Science Foundation of China[41401110]
WOS研究方向Environmental Sciences & Ecology ; Geology
语种英语
WOS记录号WOS:000445731100010
出版者AMER GEOPHYSICAL UNION
资助机构Ministry of Science and Technology of China ; Northwest A & F University of China ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/52871]  
专题中国科学院地理科学与资源研究所
通讯作者Shi, Hao; Wang, Shaoqiang
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
3.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi, Peoples R China
4.Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua, Peoples R China
5.Univ Technol Sydney, Sch Life Sci, Sydney, NSW, Australia
6.Univ Technol Sydney, Terr Ecosyst Res Network, Australian Supersite Network, Sydney, NSW, Australia
7.South China Normal Univ, Sch Geog, Guangzhou, Guangdong, Peoples R China
8.China Meteorol Adm, Agrometeorol Ctr, Natl Meteorol Ctr, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Li, Yue,Shi, Hao,Zhou, Lei,et al. Disentangling Climate and LAI Effects on Seasonal Variability in Water Use Efficiency Across Terrestrial Ecosystems in China[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2018,123(8):2429-2443.
APA Li, Yue.,Shi, Hao.,Zhou, Lei.,Eamus, Derek.,Huete, Alfredo.,...&Wang, Shaoqiang.(2018).Disentangling Climate and LAI Effects on Seasonal Variability in Water Use Efficiency Across Terrestrial Ecosystems in China.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,123(8),2429-2443.
MLA Li, Yue,et al."Disentangling Climate and LAI Effects on Seasonal Variability in Water Use Efficiency Across Terrestrial Ecosystems in China".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 123.8(2018):2429-2443.

入库方式： OAI收割

来源：地理科学与资源研究所

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