The asynchronous response of carbon gain and water loss generate spatio-temporal pattern of WUE along elevation gradient in southwest China
文献类型：期刊论文
| 作者 | Sun Xiangyang3 ; Wang Genxu3; Huang Mei1; Chang Ruiying3; Hu Zhaoyong3; Song Chunlin3; Sun Juying2,3
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| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2020-02-01 |
| 卷号 | 581页码:124389 |
| ISSN号 | 0022-1694 |
| 关键词 | carbon gain water loss southwest China |
| DOI | 10.1016/j.jhydrol.2019.124389 |
| 通讯作者 | Wang Genxu(wanggx@imde.ac.cn) |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Water use efficiency (WUE) is a key characteristic of ecosystem function, and reflects the trade-off relationship between carbon gain and water loss. The coupled relationship between carbon and water is complex for ecosystems, especially along elevation gradient. A foliage stable carbon isotope method and the AVIM2 model were used to study the temporal and elevational pattern of carbon gain, water loss and WUE in subalpine dark coniferous forests (Abies fabri). The results showed that monthly WUE in wet season was larger than in dry season. The diverse response curves between carbon gain, water loss and meteorological factors, such as monthly precipitation, air temperature (Ta), vapor pressure deficit (VPD) and net radiation (Rn), determined the monthly variation of WUE. Both the carbon gain (gross primary production, GPP; net primary production, NPP) and water loss (evapotranspiration, ET; transpiration, Et) decreased as elevation increased. The carbon gain exhibited moderately decreasing rate compared with that of water loss along the elevation gradient. Plant WUE (GPP/Et or NPP/Et) exhibited an increasing trend along the elevation gradient, comparing with ecosystem WUE (GPP/ET or NPP/ET) only increased from 2800 to 3500 m a.s.l. and slightly decreased as elevation continue increasing to 3700 m a.s.l. The ratio of canopy interception to ET determined the varied elevational pattern of WUE between plant and ecosystem scale. Air temperature contributed 79.27% and 68.66% for elevational pattern of GPP and transpiration (Et), respectively. While Ta and c(i)/c(a) (ratio of intercellular and air CO2 concentration) contributed 50.67% and 47.67 to the variation of GPP/Et along elevation gradient, respectively. The canopy height and canopy coverage were significantly negative with WUE along the elevation gradient. The asynchronous response of the carbon gain and water loss to climatic and physiological variables determined the temporal and elevational patterns of ecosystem WUE. |
| 电子版国际标准刊号 | 1879-2707 |
| WOS关键词 | AGE-RELATED-CHANGES ; USE EFFICIENCY ; ISOTOPE DISCRIMINATION ; LEAF DELTA-C-13 ; CLIMATE-CHANGE ; ECOSYSTEM ; ABIES ; FOREST ; DIOXIDE ; TREES |
| 资助项目 | National Natural Science Foundation of China[41790431] ; National Natural Science Foundation of China[41890821] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-DQC006] ; 135 Strategic Program of the Institute of Mountain Hazards and Environment, CAS[SDS-135-1702] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000514758300032 |
| 资助机构 | National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; 135 Strategic Program of the Institute of Mountain Hazards and Environment, CAS |
| 源URL | [http://ir.imde.ac.cn/handle/131551/34075]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 通讯作者 | Wang Genxu |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Sun Xiangyang,Wang Genxu,Huang Mei,et al. The asynchronous response of carbon gain and water loss generate spatio-temporal pattern of WUE along elevation gradient in southwest China[J]. JOURNAL OF HYDROLOGY,2020,581:124389. |
| APA | Sun Xiangyang.,Wang Genxu.,Huang Mei.,Chang Ruiying.,Hu Zhaoyong.,...&Sun Juying.(2020).The asynchronous response of carbon gain and water loss generate spatio-temporal pattern of WUE along elevation gradient in southwest China.JOURNAL OF HYDROLOGY,581,124389. |
| MLA | Sun Xiangyang,et al."The asynchronous response of carbon gain and water loss generate spatio-temporal pattern of WUE along elevation gradient in southwest China".JOURNAL OF HYDROLOGY 581(2020):124389. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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