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Effects of Light Component and Water Stress on Photosynthesis of Amazon Rainforests During the 2015/2016 El Nino Drought
Yan, Hao1,2; Wang, Shao-qiang3; Huete, Alfredo4; Shugart, Herman H.2
2019-06-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN2169-8953
Volume124Issue:6Pages:1574-1590
Corresponding AuthorYan, Hao(yanhaon@hotmail.com)
AbstractWhether enhanced sunshine increases photosynthesis in Amazon rainforests during drought is unclear. Here we used a light component-based two-leaf-photosynthesis model, driven with climate data and satellite vegetation data, to inspect the controlling mechanisms among climate factors on gross primary production (GPP) during the 2015/2016 El Nino drought event. We found that simulated GPP and Moderate Resolution Imaging Spectroradiometer enhanced vegetation index indicated an Amazonian browning and not a green up during the 2015/2016 El Nino year relative to the 2011-2014 interval. The result shows that, along with intensified sunlight, diffuse sunlight and diffuse fraction as well as canopy light use efficiency decreased, which further produced a decreased potential GPP* (determined by light components and leaf area index of shaded and sunlit leaves). The decreased GPP* and drought-induced water stress jointly reduced canopy photosynthesis of Amazon rainforests during the 2015/2016 drought. The light component variations caused a reduction in GPP but with a magnitude inferior to the GPP reduction from water stress. These findings suggest that intensified sunlight did not enhance photosynthesis of Amazon rainforests and highlight the important role of light components in interannual and seasonal variations of photosynthesis in Amazon rainforests.
KeywordAmazon rainforests 2015 2016 El Nino light components diffuse fraction canopy light use efficiency photosynthesis
DOI10.1029/2018JG004988
WOS KeywordGROSS PRIMARY PRODUCTION ; INDUCED CHLOROPHYLL FLUORESCENCE ; USE EFFICIENCY MODEL ; LEAF-AREA INDEX ; CANOPY PHOTOSYNTHESIS ; PRIMARY PRODUCTIVITY ; GLOBAL VEGETATION ; EVERGREEN FORESTS ; CARBON ; SEASONALITY
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2017YFC1502402] ; National Key Research and Development Program of China[2017YFC0503803] ; National Natural Science Foundation of China[41571327] ; National Natural Science Foundation of China[41171284] ; NASA[10-CARBON10-0068] ; NASA[Climate Change/09-IDS09-116]
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; NASA
WOS Research AreaEnvironmental Sciences & Ecology ; Geology
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary
WOS IDWOS:000477719400012
PublisherAMER GEOPHYSICAL UNION
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Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/58262
Collection中国科学院地理科学与资源研究所
Corresponding AuthorYan, Hao
Affiliation1.China Meteorol Adm, Natl Meteorol Ctr, Beijing, Peoples R China
2.Univ Virginia, Dept Environm Sci, Clark Hall, Charlottesville, VA 22903 USA
3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modelling, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
4.Univ Technol Sydney, Sch Life Sci, Sydney, NSW, Australia
Recommended Citation
GB/T 7714
Yan, Hao,Wang, Shao-qiang,Huete, Alfredo,et al. Effects of Light Component and Water Stress on Photosynthesis of Amazon Rainforests During the 2015/2016 El Nino Drought[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2019,124(6):1574-1590.
APA Yan, Hao,Wang, Shao-qiang,Huete, Alfredo,&Shugart, Herman H..(2019).Effects of Light Component and Water Stress on Photosynthesis of Amazon Rainforests During the 2015/2016 El Nino Drought.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,124(6),1574-1590.
MLA Yan, Hao,et al."Effects of Light Component and Water Stress on Photosynthesis of Amazon Rainforests During the 2015/2016 El Nino Drought".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 124.6(2019):1574-1590.
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