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| DOI | 10.1093/treephys/tpaa169 |
| Contrasting growth responses of Qilian juniper (Sabina przewalskii) and Qinghai spruce (Picea crassifolia) to CO2 fertilization despite common water-use efficiency increases at the northeastern Qinghai-Tibetan plateau | |
| Wang, Wenzhi; McDowell, Nate G.; Liu, Xiaohong; Xu, Guobao; Wu, Guoju; Zeng, Xiaomin; Wang, Genxu | |
| 通讯作者 | Wang, WZ (通讯作者)，Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolut & Regulat, Chengdu 610041, Sichuan, Peoples R China. ; Wang, WZ (通讯作者)，Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99352 USA. ; Liu, XH (通讯作者)，Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710119, Shaanxi, Peoples R China. ; Liu, XH (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China. |
| 发表日期 | 2021 |
| ISSN | 0829-318X |
| EISSN | 1758-4469 |
| 起始页码 | 992 |
| 结束页码 | 1003 |
| 卷号 | 41期号:6 |
| 英文摘要 | Rising atmospheric carbon dioxide (CO2) may enhance tree growth and mitigate drought impacts through CO2 fertilization. However, multiple studies globally have found that rising CO2 has not translated into greater tree growth despite increases in intrinsic water-use efficiency (iWUE). The underlying mechanism discriminating between these two general responses to CO2 fertilization remains unclear. We used two species with contrasting stomatal regulation, the relatively anisohydric Qilian juniper (Sabina przewalskii) and the relatively isohydric Qinghai spruce (Picea crassifolia), to investigate the long-term tree growth and iWUE responses to climate change and elevated CO2 using tree ring widths and the associated cellulose stable carbon isotope ratios (delta C-13). We observed a contrasting growth trend of juniper and spruce with juniper growth increasing while the spruce growth declined. The iWUE of both species increased significantly and with similar amplitude throughout the trees' lifespan, though the relatively anisohydric juniper had higher iWUE than the relatively isohydric spruce throughout the period. Additionally, with rising CO2, the anisohydric juniper became less sensitive to drought, while the relatively isohydric spruce became more sensitive to drought. We hypothesized that rising CO2 benefits relatively anisohydric species more than relatively isohydric species due to greater opportunity to acquire carbon through photosynthesis despite warming and droughts. Our findings suggest the CO2 fertilization effect depends on the isohydric degree, which could be considered in future terrestrial ecosystem models. |
| 关键词 | CARBON-ISOTOPE DISCRIMINATIONTREE GROWTHSTOMATAL CONDUCTANCESTABLE-ISOTOPESATMOSPHERIC CO2RADIAL GROWTHNORWAY SPRUCEELEVATED CO2DROUGHTCLIMATE |
| 英文关键词 | iso-anisohydry continuum; tree growth; tree ring delta C-13 |
| 语种 | 英语 |
| WOS研究方向 | Forestry |
| WOS类目 | Forestry |
| WOS记录号 | WOS:000671960000008 |
| 来源期刊 | TREE PHYSIOLOGY
 |
| 来源机构 | 中国科学院西北生态环境资源研究院 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/254622 |
| 作者单位 | [Wang, Wenzhi; Wang, Genxu] Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolut & Regulat, Chengdu 610041, Sichuan, Peoples R China; [Wang, Wenzhi; McDowell, Nate G.] Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99352 USA; [McDowell, Nate G.] Washington State Univ, Sch Biol Sci, Pullman, WA 99164 USA; [Liu, Xiaohong; Zeng, Xiaomin] Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710119, Shaanxi, Peoples R China; [Liu, Xiaohong; Xu, Guobao; Wu, Guoju] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Wenzhi,McDowell, Nate G.,Liu, Xiaohong,et al. Contrasting growth responses of Qilian juniper (Sabina przewalskii) and Qinghai spruce (Picea crassifolia) to CO2 fertilization despite common water-use efficiency increases at the northeastern Qinghai-Tibetan plateau[J]. 中国科学院西北生态环境资源研究院,2021,41(6). |
| APA | Wang, Wenzhi.,McDowell, Nate G..,Liu, Xiaohong.,Xu, Guobao.,Wu, Guoju.,...&Wang, Genxu.(2021).Contrasting growth responses of Qilian juniper (Sabina przewalskii) and Qinghai spruce (Picea crassifolia) to CO2 fertilization despite common water-use efficiency increases at the northeastern Qinghai-Tibetan plateau.TREE PHYSIOLOGY,41(6). |
| MLA | Wang, Wenzhi,et al."Contrasting growth responses of Qilian juniper (Sabina przewalskii) and Qinghai spruce (Picea crassifolia) to CO2 fertilization despite common water-use efficiency increases at the northeastern Qinghai-Tibetan plateau".TREE PHYSIOLOGY 41.6(2021). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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