Shrub type dominates the vertical distribution of leaf C : N : P stoichiometry across an extensive altitudinal gradient
文献类型：期刊论文
| 作者 | Zhao, Wenqiang1,2; Reich, Peter B.3,4; Yu, Qiannan1,2,5,6; Zhao, Ning7; Yin, Chunying1,2; Zhao, Chunzhang1,2; Li, Dandan1,2; Hu, Jun1,2; Li, Ting1,2; Yin, Huajun1,2 |
| 刊名 | BIOGEOSCIENCES
 |
| 出版日期 | 2018-04-09 |
| 卷号 | 15期号:7页码:2033-2053 |
| ISSN号 | 1726-4170 |
| DOI | 10.5194/bg-15-2033-2018 |
| 通讯作者 | Yin, Huajun(yinhj@cib.ac.cn) ; Liu, Qing(liuqing@cib.ac.cn) |
| 英文摘要 | Understanding leaf stoichiometric patterns is crucial for improving predictions of plant responses to environmental changes. Leaf stoichiometry of terrestrial ecosystems has been widely investigated along latitudinal and longitudinal gradients. However, very little is known about the vertical distribution of leaf C : N : P and the relative effects of environmental parameters, especially for shrubs. Here, we analyzed the shrub leaf C, N and P patterns in 125 mountainous sites over an extensive altitudinal gradient (523-4685 m) on the Tibetan Plateau. Results showed that the shrub leaf C and C : N were 7.3-47.5% higher than those of other regional and global flora, whereas the leaf N and N: P were 10.2-75.8% lower. Leaf C increased with rising altitude and decreasing temperature, supporting the physiological acclimation mechanism that high leaf C (e.g., alpine or evergreen shrub) could balance the cell osmotic pressure and resist freezing. The largest leaf N and high leaf P occurred in valley region (altitude 1500 m), likely due to the large nutrient leaching from higher elevations, faster litter decomposition and nutrient resorption ability of deciduous broadleaf shrub. Leaf N: P ratio further indicated increasing N limitation at higher altitudes. Interestingly, drought severity was the only climatic factor positively correlated with leaf N and P, which was more appropriate for evaluating the impact of water status than precipitation. Among the shrub ecosystem and functional types (alpine, subalpine, montane, valley, evergreen, deciduous, broadleaf, and conifer), their leaf element contents and responses to environments were remarkably different. Shrub type was the largest contributor to the total variations in leaf stoichiometry, while climate indirectly affected the leaf C : N: P via its interactive effects on shrub type or soil. Collectively, the large heterogeneity in shrub type was the most important factor explaining the overall leaf C : N: P variations, despite the broad climate gradient on the plateau. Temperature and drought induced shifts in shrub type distribution will influence the nutrient accumulation in mountainous shrubs. |
| 收录类别 | SCI |
| WOS关键词 | ERICOID MYCORRHIZAL FUNGI ; DROUGHT INDEX RDI ; PHOSPHORUS CONCENTRATIONS ; TIBETAN PLATEAU ; NITROGEN ; CHINA ; SOIL ; FORESTS ; CLIMATE ; TERRESTRIAL |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| WOS类目 | Ecology ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000429474600002 |
| 出版者 | COPERNICUS GESELLSCHAFT MBH |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558158 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Yin, Huajun; Liu, Qing |
| 作者单位 | 1.Chinese Acad Sci, Chengdu Inst Biol, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu 610041, Sichuan, Peoples R China 2.Chinese Acad Sci, Chengdu Inst Biol, Ecol Restorat Biodivers Conservat Key Lab Sichuan, Chengdu 610041, Sichuan, Peoples R China 3.Univ Minnesota, Dept Forest Resources, St Paul, MN 55108 USA 4.Univ Minnesota, Inst Environm, St Paul, MN 55108 USA 5.Southwest Jiaotong Univ, Chengdu 611756, Sichuan, Peoples R China 6.Fac Geosci & Environm Engn, Chengdu 611756, Sichuan, Peoples R China 7.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Wenqiang,Reich, Peter B.,Yu, Qiannan,et al. Shrub type dominates the vertical distribution of leaf C : N : P stoichiometry across an extensive altitudinal gradient[J]. BIOGEOSCIENCES,2018,15(7):2033-2053. |
| APA | Zhao, Wenqiang.,Reich, Peter B..,Yu, Qiannan.,Zhao, Ning.,Yin, Chunying.,...&Liu, Qing.(2018).Shrub type dominates the vertical distribution of leaf C : N : P stoichiometry across an extensive altitudinal gradient.BIOGEOSCIENCES,15(7),2033-2053. |
| MLA | Zhao, Wenqiang,et al."Shrub type dominates the vertical distribution of leaf C : N : P stoichiometry across an extensive altitudinal gradient".BIOGEOSCIENCES 15.7(2018):2033-2053. |
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来源：寒区旱区环境与工程研究所
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