Intra-annual tree-ring delta O-18 and delta C-13 reveal a trade-off between isotopic source and humidity in moist environments
文献类型：期刊论文
| 作者 | Xu, GB; Liu, XH; Hu, J; Dorado-Linan, I; Gagen, M; Szejner, P; Chen, T; Trouet, V |
| 刊名 | TREE PHYSIOLOGY
 |
| 出版日期 | 2022 |
| 卷号 | 42期号:11页码:2203 |
| 英文摘要 | Tree-ring intra-annual stable isotopes (delta C-13 and delta O-18) are powerful tools for revealing plant ecophysiological responses to climatic extremes. We analyzed interannual and fine-scale intra-annual variability of tree-ring delta C-13 and delta O-18 in Chinese red pine (Pinus massoniana) from southeastern China to explore environmental drivers and potential trade-offs between the main physiological controls. We show that wet season relative humidity (May-October RH) drove interannual variability of delta O-18 and intra-annual variability of tree-ring delta O-18. It also drove intra-annual variability of tree-ring delta C-13, whereas interannual variability was mainly controlled by February-May temperature and September-October RH. Furthermore, intra-annual tree-ring delta O-18 variability was larger during wet years compared with dry years, whereas delta C-13 variability was lower during wet years compared with dry years. As a result of these differences in intra-annual variability amplitude, process-based models (we used the Roden model for delta O-18 and the Farquhar model for delta C-13) captured the intra-annual delta O-18 pattern better in wet years compared with dry years, whereas intra-annual delta C-13 pattern was better simulated in dry years compared with wet years. This result suggests a potential asymmetric bias in process-based models in capturing the interplay of the different mechanistic processes (i.e., isotopic source and leaf-level enrichment) operating in dry versus wet years. We therefore propose an intra-annual conceptual model considering a dynamic trade-off between the isotopic source and leaf-level enrichment in different tree-ring parts to understand how climate and ecophysiological processes drive intra-annual tree-ring stable isotopic variability under humid climate conditions. |
| 源URL | [http://210.75.249.4/handle/363003/61159]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 推荐引用方式 GB/T 7714 | Xu, GB,Liu, XH,Hu, J,et al. Intra-annual tree-ring delta O-18 and delta C-13 reveal a trade-off between isotopic source and humidity in moist environments[J]. TREE PHYSIOLOGY,2022,42(11):2203. |
| APA | Xu, GB.,Liu, XH.,Hu, J.,Dorado-Linan, I.,Gagen, M.,...&Trouet, V.(2022).Intra-annual tree-ring delta O-18 and delta C-13 reveal a trade-off between isotopic source and humidity in moist environments.TREE PHYSIOLOGY,42(11),2203. |
| MLA | Xu, GB,et al."Intra-annual tree-ring delta O-18 and delta C-13 reveal a trade-off between isotopic source and humidity in moist environments".TREE PHYSIOLOGY 42.11(2022):2203. |
入库方式： OAI收割
来源：西北高原生物研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。