Limited Regulation of Canopy Water Use Efficiency by Stomatal Behavior Under Drought Propagation
文献类型：期刊论文
| 作者 | Li, Feng2,3; Xin, Qinchuan4; Yi, Chuixiang5,6; Kannenberg, Steven A.7; Green, Julia K.8; Migliavacca, Mirco9; Moore, David J. P.10; Kemanian, Armen R.11; Gentine, Pierre12,13; Stoy, Paul C.1 |
| 刊名 | GLOBAL CHANGE BIOLOGY
 |
| 出版日期 | 2025-07-26 |
| 卷号 | 31期号:7页码:e70381 |
| 关键词 | canopy conductance drought propagation drought response drought threshold gross primary productivity transpiration water use efficiency water-carbon trade-off |
| ISSN号 | 1354-1013 |
| DOI | 10.1111/gcb.70381 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | Water use efficiency (WUE) is a critical ecosystem function and a key indicator of vegetation responses to drought, yet its temporal trajectories and underlying drivers during drought propagation remain insufficiently understood. Here, we examined the trajectories, interdependencies and drivers of multidimensional WUE metrics and their components (gross primary production (GPP), evapotranspiration, transpiration (T), and canopy conductance (Gc)) using a conceptual drought propagation framework. We found that even though the carbon assimilation efficiency per stomata increases during drought, the canopy-level WUE (represented by transpiration WUE (TWUE)) declines, indicating that stomatal regulation operates primarily at the leaf level and cannot offset the drought-induced reduction in WUE at the canopy scale. A stronger dependence on T and TWUE indicates that the water-carbon trade-off relationship of vegetation more inclines toward water transport than carbon assimilation. Gc fails to prevent the sharp decline in GPP during drought and has limited capacity to suppress T, as reflected by the reduction magnitude and the threshold (the turning point at which a component shifts from a normal to drought-responsive state). The primary drivers of the water-carbon relationship under drought propagation include vapor pressure deficit and hydraulic traits. Among plant functional types, grasslands show the strongest water-carbon fluxes in response to drought, whereas evergreen broadleaf forests exhibit the weakest response. These findings refine our comprehensive understanding of multidimensional ecosystem functional dynamics under drought propagation and enlighten how the physiological response of vegetation to drought affects the carbon and water cycles. |
| URL标识 | 查看原文 |
| WOS关键词 | VAPOR-PRESSURE DEFICIT ; CONDUCTANCE ; TRANSPIRATION ; VULNERABILITY ; FLUXES ; LEAF ; DRY ; CO2 |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001536249400001 |
| 出版者 | WILEY |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/215647]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Xiong, Yujiu; Fu, Zheng |
| 作者单位 | 1.Univ Wisconsin Madison, Dept Biol Syst Engn, Madison, WI USA; 2.Sun Yat Sen Univ, Sch Civil Engn, Zhuhai, Peoples R China; 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China; 4.Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou, Peoples R China; 5.CUNY, Queens Coll, Sch Earth & Environm Sci, Flushing, NY USA; 6.CUNY, Grad Ctr, Earth & Environm Sci Dept, New York, NY USA; 7.West Virginia Univ, Dept Biol, Morgantown, WV 26506 USA; 8.Univ Arizona, Dept Environm Sci, Tucson, AZ USA; 9.European Commiss, Joint Res Ctr JRC, Ispra, VA, Italy; 10.Univ Arizona, Sch Nat Resources & Environm, Biol Sci East, Tucson, AZ USA; |
| 推荐引用方式 GB/T 7714 | Li, Feng,Xin, Qinchuan,Yi, Chuixiang,et al. Limited Regulation of Canopy Water Use Efficiency by Stomatal Behavior Under Drought Propagation[J]. GLOBAL CHANGE BIOLOGY,2025,31(7):e70381. |
| APA | Li, Feng.,Xin, Qinchuan.,Yi, Chuixiang.,Kannenberg, Steven A..,Green, Julia K..,...&Fu, Zheng.(2025).Limited Regulation of Canopy Water Use Efficiency by Stomatal Behavior Under Drought Propagation.GLOBAL CHANGE BIOLOGY,31(7),e70381. |
| MLA | Li, Feng,et al."Limited Regulation of Canopy Water Use Efficiency by Stomatal Behavior Under Drought Propagation".GLOBAL CHANGE BIOLOGY 31.7(2025):e70381. |
入库方式： OAI收割
来源：地理科学与资源研究所
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