Contrasting responses of water use efficiency to drought across global terrestrial ecosystems
文献类型：期刊论文
| 作者 | Yang, Yuting1,2; Guan, Huade1,3; Batelaan, Okke1,3; McVicar, Tim R.2,4; Long, Di5; Piao, Shilong6; Liang, Wei7; Liu, Bing8; Jin, Zhao7; Simmons, Craig T.1,3 |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2016-03-17 |
| 卷号 | 6页码:8 |
| ISSN号 | 2045-2322 |
| DOI | 10.1038/srep23284 |
| 通讯作者 | Yang, Yuting(yuting.yang@csiro.au) |
| 英文摘要 | Drought is an intermittent disturbance of the water cycle that profoundly affects the terrestrial carbon cycle. However, the response of the coupled water and carbon cycles to drought and the underlying mechanisms remain unclear. Here we provide the first global synthesis of the drought effect on ecosystem water use efficiency (WUE = gross primary production (GPP)/evapotranspiration (ET)). Using two observational WUE datasets (i.e., eddy-covariance measurements at 95 sites (526 site-years) and global gridded diagnostic modelling based on existing observation and a data-adaptive machine learning approach), we find a contrasting response of WUE to drought between arid (WUE increases with drought) and semi-arid/sub-humid ecosystems (WUE decreases with drought), which is attributed to different sensitivities of ecosystem processes to changes in hydro-climatic conditions. WUE variability in arid ecosystems is primarily controlled by physical processes (i.e., evaporation), whereas WUE variability in semi-arid/sub-humid regions is mostly regulated by biological processes (i.e., assimilation). We also find that shifts in hydro-climatic conditions over years would intensify the drought effect on WUE. Our findings suggest that future drought events, when coupled with an increase in climate variability, will bring further threats to semi-arid/sub-humid ecosystems and potentially result in biome reorganization, starting with low-productivity and high water-sensitivity grassland. |
| 收录类别 | SCI |
| WOS关键词 | EUCALYPTUS-MACULATA HOOK ; NET PRIMARY PRODUCTION ; CARBON-DIOXIDE ; VEGETATION COVER ; CANOPY DYNAMICS ; LEAF-AREA ; CLIMATE ; AUSTRALIA ; CHINA ; PLANT |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000372144300001 |
| 出版者 | NATURE PUBLISHING GROUP |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557378 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Yang, Yuting |
| 作者单位 | 1.Flinders Univ S Australia, Sch Environm, Adelaide, SA 5042, Australia 2.CSIRO Land & Water, Canberra, ACT 2601, Australia 3.Natl Ctr Groundwater Res & Training, Adelaide, SA 5042, Australia 4.Australian Res Council, Ctr Excellence Climate Syst Sci, Sydney, NSW, Australia 5.Tsinghua Univ, Dept Hydraul Engn, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China 6.Peking Univ, Coll Urban & Environm Sci, Sinofrench Inst Earth Syst Sci, Beijing 100871, Peoples R China 7.Shaanxi Normal Univ, Coll Tourism & Environm Sci, Xian 710062, Peoples R China 8.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lab Heihe River Ecohydrol & Basin Sci, Linze Inland River Basin Res Stn, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Yuting,Guan, Huade,Batelaan, Okke,et al. Contrasting responses of water use efficiency to drought across global terrestrial ecosystems[J]. SCIENTIFIC REPORTS,2016,6:8. |
| APA | Yang, Yuting.,Guan, Huade.,Batelaan, Okke.,McVicar, Tim R..,Long, Di.,...&Simmons, Craig T..(2016).Contrasting responses of water use efficiency to drought across global terrestrial ecosystems.SCIENTIFIC REPORTS,6,8. |
| MLA | Yang, Yuting,et al."Contrasting responses of water use efficiency to drought across global terrestrial ecosystems".SCIENTIFIC REPORTS 6(2016):8. |
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来源：寒区旱区环境与工程研究所
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