Pedogenic carbonate isotope record of vegetational evolution since late Miocene in Loess Plateau
文献类型：期刊论文
| 作者 | Yang, SL; Ding, ZL; Gu, ZY; Sun, JM; Xiong, SF |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 1999-06-01 |
| 卷号 | 44期号:11页码:1034-1038 |
| 关键词 | pedogenic carbonate palaeovegetation shift atmospheric CO2 concentrations |
| ISSN号 | 1001-6538 |
| 文献子类 | Article |
| 英文摘要 | Isotopic analyses for paleovegetational evolution have been carried out on samples of the pedogenic carbonate nodules in the Red Clay-Loess sequence at Lingtai (35 degrees N), the Loess Plateau. Stable carbon isotopic composition indicates that (i) C-4 plants might be present at least by 7.0 Ma; (ii) C-4 plants expanded gradually between similar to 4.0 and similar to 3.2 Ma, and their biomass fraction was up to 50%; and (iii) the biomass of C-4 vegetation since similar to 2.0 Ma seems to have been decreased to the level (about 20%) before 4.0 Ma. C-4 plant expansion at Lingtai cannot be fully understood with the "global C-4 expansion" model because it occurred much later up to 3.0 Ma than in Pakistan, which indicates that some changes in the regional climatic system may also contribute to C-3/C-4 shift except changes in atmospheric CO2 concentrations and temperature. The latitudinal zone for C-3/C-4 transition seems to move southwards slightly in East Asia, compared with the case in North America where 37 degrees N is the ideal boundary for the C-4 expansion. |
| WOS关键词 | BOUNDARY ; PAKISTAN ; CHINA |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000082563400016 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/75474]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Yang, SL |
| 作者单位 | Chinese Acad Sci, Inst Geol, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, SL,Ding, ZL,Gu, ZY,et al. Pedogenic carbonate isotope record of vegetational evolution since late Miocene in Loess Plateau[J]. CHINESE SCIENCE BULLETIN,1999,44(11):1034-1038. |
| APA | Yang, SL,Ding, ZL,Gu, ZY,Sun, JM,&Xiong, SF.(1999).Pedogenic carbonate isotope record of vegetational evolution since late Miocene in Loess Plateau.CHINESE SCIENCE BULLETIN,44(11),1034-1038. |
| MLA | Yang, SL,et al."Pedogenic carbonate isotope record of vegetational evolution since late Miocene in Loess Plateau".CHINESE SCIENCE BULLETIN 44.11(1999):1034-1038. |
入库方式： OAI收割
来源：地质与地球物理研究所
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