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Experimental warming amplified opposite impacts of drought vs. wet extremes on ecosystem carbon cycle in a tallgrass prairie

文献类型：期刊论文

作者Jung, Chang Gyo6,7; Xu, Xia8; Niu, Shuli1,9; Liang, Junyi2,3; Chen, Xuecheng5; Shi, Zheng5; Jiang, Lifen6,7; Luo, Yiqi4,6,7
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2019-10-15
卷号276页码:8
关键词Climate warming Drought Ecosystem carbon cycle Grasslands Long-term experiment Extreme precipitation
ISSN号0168-1923
DOI10.1016/j.agrformet.2019.107635
通讯作者Jung, Chang Gyo(cgjung86@nau.edu) ; Luo, Yiqi(yiqi.luo@nau.edu)
英文摘要Climate warming is leading to greater precipitation variability, resulting in increased frequency and intensity of both drought and wet extremes. However, how these extreme events interact with climate warming and hay-harvest in grasslands to impact ecosystem functions has not yet been well explored. In this study, we took advantage of a long-term experiment to examine how climate warming and clipping (i.e., mimicking hay harvest) regulated impacts of naturally occurring drought and wet extremes on ecosystem CO2 fluxes of a tallgrass prairie in the Great Plains, USA. Warming resulted in net ecosystem carbon release (i.e., positive net ecosystem CO2 exchange, NEE) in the extreme drought year of 2011, but significantly enhanced net carbon uptake in the extremely wet year of 2015 in comparison with NEE in normal years. Warming-induced carbon release in the drought year was due to significantly enhanced ecosystem respiration (ER) from mid-summer to early-autumn, whereas warming-enhanced NEE in the wet year was due to an increase in aboveground net primary production (ANPP) compared to those in normal years. Drought diminished warming-induced increases in ANPP to about one sixth of that in the wet year in the unclipped plots. Interestingly, clipping offset the drought-mediated ecosystem carbon loss by increasing GPP and weakened the wet-enhanced ANPP. Overall, our results suggest that a future, warmer climate may exacerbate carbon losses in terrestrial ecosystems during drought extremes but stimulate the ecosystem carbon sink under wet extremes.
WOS关键词NET PRIMARY PRODUCTIVITY ; FALSE DISCOVERY RATE ; INTERANNUAL VARIABILITY ; SOIL RESPIRATION ; WATER DYNAMICS ; CLIMATE-CHANGE ; GREAT-PLAINS ; HEAT WAVES ; PRECIPITATION ; PLANT
资助项目National Science Foundation[DEB-1655499] ; US Department of Energy, Terrestrial Ecosystem Sciences[DE-SC0006982] ; Oak Ridge National Laboratory (ORNL)[4000158404] ; Oak Ridge National Laboratory (ORNL)[4000161830] ; US Department of Energy (DOE), Office of Science, Office of Biological and Environmental Research ; U.S. Department of Energy[DE-AC05-00OR22725]
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000500195900030
出版者ELSEVIER
资助机构National Science Foundation ; US Department of Energy, Terrestrial Ecosystem Sciences ; Oak Ridge National Laboratory (ORNL) ; US Department of Energy (DOE), Office of Science, Office of Biological and Environmental Research ; U.S. Department of Energy
源URL[http://ir.igsnrr.ac.cn/handle/311030/130535]  
专题中国科学院地理科学与资源研究所
通讯作者Jung, Chang Gyo; Luo, Yiqi
作者单位1.Univ Chinese Acad Sci, Dept Resources & Environm, Beijing, Peoples R China
2.Oak Ridge Natl Lab, Environm Sci Div, Oak Ridge, TN USA
3.Oak Ridge Natl Lab, Climate Change Sci Inst, Oak Ridge, TN USA
4.Tsinghua Univ, Dept Earth Syst Sci, Beijing, Peoples R China
5.Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK 73019 USA
6.No Arizona Univ, Dept Biol Sci, Box 5640, Flagstaff, AZ 86011 USA
7.No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA
8.Nanjing Forestry Univ, Coll Biol & Environm, Nanjing, Jiangsu, Peoples R China
9.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Jung, Chang Gyo,Xu, Xia,Niu, Shuli,et al. Experimental warming amplified opposite impacts of drought vs. wet extremes on ecosystem carbon cycle in a tallgrass prairie[J]. AGRICULTURAL AND FOREST METEOROLOGY,2019,276:8.
APA Jung, Chang Gyo.,Xu, Xia.,Niu, Shuli.,Liang, Junyi.,Chen, Xuecheng.,...&Luo, Yiqi.(2019).Experimental warming amplified opposite impacts of drought vs. wet extremes on ecosystem carbon cycle in a tallgrass prairie.AGRICULTURAL AND FOREST METEOROLOGY,276,8.
MLA Jung, Chang Gyo,et al."Experimental warming amplified opposite impacts of drought vs. wet extremes on ecosystem carbon cycle in a tallgrass prairie".AGRICULTURAL AND FOREST METEOROLOGY 276(2019):8.

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来源：地理科学与资源研究所

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