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Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China
Zhu, Xianjin1,2; Yu, Guirui1; Wang, Qiufeng1; Hu, Zhongmin1; Han, Shijie3; Yan, Junhua4; Wang, Yanfen2; Zhao, Liang5
2014-02-01
Source PublicationJOURNAL OF FOREST RESEARCH
ISSN1341-6979
Volume19Issue:1Pages:70-76
SubtypeArticle
AbstractWe selected four sites of ChinaFLUX representing four major ecosystem types in China-Changbaishan temperate broad-leaved Korean pine mixed forest (CBS), Dinghushan subtropical evergreen broadleaved forest (DHS), Inner Mongolia temperate steppe (NM), and Haibei alpine shrub-meadow (HBGC)-to study the seasonal dynamics of ecosystem water use efficiency (WUE = GPP/ET, where GPP is gross primary productivity and ET is evapotranspiration) and factors affecting it. Our seasonal dynamics results indicated single-peak variation of WUE in CBS, NM, and HBGC, which were affected by air temperature (Ta) and leaf area index (LAI), through their effects on the partitioning of evapotranspiration (ET) into transpiration (T) (i.e., T/ET). In DHS, WUE was higher at the beginning and the end of the year, and minimum in summer. Ta and soil water content affected the seasonal dynamics of WUE through their effects on GPP/T. Our results indicate that seasonal dynamics of WUE were different because factors affecting the seasonal dynamics and their mechanism were different among the key ecosystems.; We selected four sites of ChinaFLUX representing four major ecosystem types in China-Changbaishan temperate broad-leaved Korean pine mixed forest (CBS), Dinghushan subtropical evergreen broadleaved forest (DHS), Inner Mongolia temperate steppe (NM), and Haibei alpine shrub-meadow (HBGC)-to study the seasonal dynamics of ecosystem water use efficiency (WUE = GPP/ET, where GPP is gross primary productivity and ET is evapotranspiration) and factors affecting it. Our seasonal dynamics results indicated single-peak variation of WUE in CBS, NM, and HBGC, which were affected by air temperature (Ta) and leaf area index (LAI), through their effects on the partitioning of evapotranspiration (ET) into transpiration (T) (i.e., T/ET). In DHS, WUE was higher at the beginning and the end of the year, and minimum in summer. Ta and soil water content affected the seasonal dynamics of WUE through their effects on GPP/T. Our results indicate that seasonal dynamics of WUE were different because factors affecting the seasonal dynamics and their mechanism were different among the key ecosystems.
KeywordEcosystems In chIna Eddy Covariance Seasonal Dynamics Water Use Efficiency
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS KeywordCARBON ; EXCHANGE ; FLUXES ; CO2
Indexed BySCI
Language英语
WOS Research AreaForestry
WOS SubjectForestry
WOS IDWOS:000329404600008
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/4260
Collection中国科学院西北高原生物研究所
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Synth Res Ctr,CERN, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
4.Chinese Acad Sci, South China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China
5.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining 810001, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Xianjin,Yu, Guirui,Wang, Qiufeng,et al. Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China[J]. JOURNAL OF FOREST RESEARCH,2014,19(1):70-76.
APA Zhu, Xianjin.,Yu, Guirui.,Wang, Qiufeng.,Hu, Zhongmin.,Han, Shijie.,...&Zhao, Liang.(2014).Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China.JOURNAL OF FOREST RESEARCH,19(1),70-76.
MLA Zhu, Xianjin,et al."Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China".JOURNAL OF FOREST RESEARCH 19.1(2014):70-76.
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