Effects of Light Component and Water Stress on Photosynthesis of Amazon Rainforests During the 2015/2016 El Nino Drought
文献类型：期刊论文
| 作者 | Yan, Hao1,2; Wang, Shao-qiang3 ; Huete, Alfredo4; Shugart, Herman H.2
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
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| 出版日期 | 2019-06-01 |
| 卷号 | 124期号:6页码:1574-1590 |
| 关键词 | Amazon rainforests 2015 2016 El Nino light components diffuse fraction canopy light use efficiency photosynthesis |
| ISSN号 | 2169-8953 |
| DOI | 10.1029/2018JG004988 |
| 通讯作者 | Yan, Hao(yanhaon@hotmail.com) |
| 英文摘要 | Whether 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. |
| WOS关键词 | GROSS PRIMARY PRODUCTION ; INDUCED CHLOROPHYLL FLUORESCENCE ; USE EFFICIENCY MODEL ; LEAF-AREA INDEX ; CANOPY PHOTOSYNTHESIS ; PRIMARY PRODUCTIVITY ; GLOBAL VEGETATION ; EVERGREEN FORESTS ; CARBON ; SEASONALITY |
| 资助项目 | National 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] |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000477719400012 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; NASA |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/58261]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Yan, Hao |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：地理科学与资源研究所
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