Application and limitations of the Artemisia/Chenopodiaceae pollen ratio in arid and semi-arid China
文献类型：SCI/SSCI论文
| 作者 | Zhao Y.; Zhao Y. |
| 发表日期 | 2012 |
| 关键词 | A/C ratio climate variables dryland vegetation types holocene vegetation tibetan plateau surface pollen qaidam basin desert vegetation alashan plateau northwest china inner-mongolia climate lake |
| 英文摘要 | The Artemisia/Chenopodiaceae (A/C) ratio is assumed to be a useful index for reconstructing moisture changes in arid and semi-arid regions. Thorough modern pollen studies are still lacking to understand the reliability and limitation of A/C ratio as a moisture indicator, however. Here we review how well this ratio can be applied in arid and semi-arid China on the basis of new surface pollen data, previous data synthesis and other publications. Results indicate that variance in the A/C ratio can permit identification of modern vegetation types and that the A/C ratio generally has a positive relationship with annual precipitation. However, soil salinity, vegetation community composition, human activity and sample provenance (e.g. soil and lake sediments) will affect the values of the A/C ratio in different vegetation zones and therefore the A/C ratio is not comparable in different regions. We argue that the A/C ratio can only be used to reconstruct vegetation types and climate change in regions with precipitation < 450-500 mm, and in steppe, steppe desert and desert areas. Careful studies should be undertaken to understand the modern pollen-vegetation-climate relationships in various regions before using the A/C ratio to interpret vegetation and climate. |
| 出处 | Holocene |
| 卷 | 22 |
| 期 | 12 |
| 页 | 1385-1392 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0959-6836 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30675]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Zhao Y.,Zhao Y.. Application and limitations of the Artemisia/Chenopodiaceae pollen ratio in arid and semi-arid China. 2012. |
入库方式： OAI收割
来源：地理科学与资源研究所
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