Water-use efficiency of forest ecosystems in eastern China and its relations to climatic variables
文献类型：SCI/SSCI论文
| 作者 | Yu G. R. ; Song X. ; Wang Q. F. ; Liu Y. F. ; Guan D. X. ; Yan J. H. ; Sun X. M. ; Zhang L. M. ; Wen X. F. |
| 发表日期 | 2008 |
| 关键词 | ChinaFLUX evapotranspiration (ET) forest ecosystem gross primary productivity (GPP) North-South transect of Eastern China (NSTEC) water-use efficiency (WUE) southern appalachian forest carbon-dioxide exchange gap filling strategies vapor exchange eddy covariance tree rings fluxes co2 growth ozone |
| 英文摘要 | Carbon (C) and water cycles of terrestrial ecosystems are two coupled ecological processes controlled partly by stomatal behavior. Water-use efficiency (WUE) reflects the coupling relationship to some extent. At stand and ecosystem levels, the variability of WUE results from the trade-off between water loss and C gain in the process of plant photosynthetic C assimilation. Continuous observations of C, water, and energy fluxes were made at three selected forest sites of ChinaFLUX with eddy covariance systems from 2003 to 2005. WUE at different temporal scales were defined and calculated with different C and water flux components. Variations in WUE were found among three sites. Average annual WUE was 9.43 mg CO2 g(-1) H2O at Changbaishan temperate broad-leaved Korean pine mixed forest, 9.27 mg CO2 g(-1) H2O at Qianyanzhou subtropical coniferous plantation, and 6.90 mg CO2 g(-1) H2O at Dinghushan subtropical evergreen broad-leaved forest. It was also found that temperate and subtropical forest ecosystems had different relationships between gross primary productivity (GPP) and evapotranspiration (ET). Variations in WUE indicated the difference in the coupling between C and water cycles. The asynchronous response of GPP and ET to climatic variables determined the coupling and decoupling between C and water cycles for the two regional forest ecosystems. |
| 出处 | New Phytologist |
| 卷 | 177 |
| 期 | 4 |
| 页 | 927-937 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0028-646X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/22519]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Yu G. R.,Song X.,Wang Q. F.,et al. Water-use efficiency of forest ecosystems in eastern China and its relations to climatic variables. 2008. |
入库方式： OAI收割
来源：地理科学与资源研究所
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