Patterns and controls of foliar nitrogen isotope composition on the Qinghai-Tibet Plateau, China
文献类型：SCI/SSCI论文
| 作者 | Zhou Y. C.; Cheng, X. L.; Fan, J. W.; Harris, W.; Wen, XF; Gao, Y; He, NP |
| 发表日期 | 2016 |
| 关键词 | Altitude Climate Foliar delta N-15 Plant functional groups Grassland Qinghai-Tibet Plateau natural-abundance delta-n-15 values plant nitrogen atmospheric co2 global patterns southern africa stable carbon elevated co2 soil forest |
| 英文摘要 | Determine if relationships between temperature, precipitation and foliar nitrogen isotopes (delta N-15) observed in various ecosystems also operate in the high-cold Qinghai-Tibet Plateau; measure variation of foliar delta N-15 with altitude, and examine relationships differences among plant functional groups (PFGs). Foliar delta N-15 at 82 grassland sites were determined and grouped for PFGs to determine relationships with temperature, precipitation and altitude. Residual foliar delta N-15 were used in regressions to eliminate effects of non-target variables. For relationships with potential breakpoints, piecewise regressions were used. Relationships of foliar delta N-15 with temperature and precipitation differed among PFGs. Foliar delta N-15 of C-3 species respectively increased and decreased with August temperature (TEM8) and precipitation (PRE8) across sites with TEM8 aeyen 9.95 A degrees C and PRE8 < 145.7 mm, whereas it was invariant across sites with TEM8 < 9.95 A degrees C and PRE8 aeyen 145.7 mm. Foliar delta N-15 decreased with altitude. Complex relationships of foliar delta N-15 with climate factors suggest caution in its use to monitor nitrogen cycling. Although the altitude pattern of foliar delta N-15 appeared to be mainly induced by temperature and precipitation, there are other altitude related factors in Qinghai-Tibet high elevations that influence foliar delta N-15. Determining the functions of these factors provides foci for future research. |
| 出处 | Plant and Soil |
| 卷 | 406 |
| 期 | 1-2 |
| 页 | 265-276 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0032-079X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/43958]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_生态网络实验室 |
| 推荐引用方式 GB/T 7714 | Zhou Y. C.,Cheng, X. L.,Fan, J. W.,et al. Patterns and controls of foliar nitrogen isotope composition on the Qinghai-Tibet Plateau, China. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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