Morphological variations of lobate phytoliths from grasses in China and the south-eastern United States
文献类型：期刊论文
| 作者 | Lu, HY; Liu, KB |
| 刊名 | DIVERSITY AND DISTRIBUTIONS
 |
| 出版日期 | 2003 |
| 卷号 | 9期号:1页码:73-87 |
| 关键词 | dumbbell grasses palaeoenvironment palynology phytoliths phytolith-lobate silica bodies taxonomy |
| ISSN号 | 1366-9516 |
| 文献子类 | Article |
| 英文摘要 | Phytolith analysis of grasses is a useful tool in palaeoenvironmental and archaeobotanical research. Lobate phytolith is one of the most important morphotypes of grass phytoliths. This study describes morphological variations of diagnostic lobate phytoliths and produces a tentative classification scheme based on 250 modern grass species from China and the south-eastern U.S.A. Eighty-five grass species were found to contain lobate phytoliths. They are derived mainly from Panicoideae, but also include the Chloridoideae, Oryzoideae and Arundinoideae subfamilies. Twenty-five lobate morphological types were observed from different subfamilies, genera or tribes of grasses, based on two important parameters: (1) the length of the lobate shank and (2) the shape of the outer margin of the two lobes. The identification of grass tribe or even genus is possible based on the differences in lobate shape parameters or the composition of assemblages. However, not all of the lobate assemblages have a definite relationship with the genera that produce them, because grasses can only produce a limited range of lobate shapes that often overlap from one genus to another. Several C-3 grasses and Chloridoideae subfamily grasses also produce characteristic lobate phytoliths. The variations of lobate morphologies can be related to environmental factors, especially moisture. Typical hygrophytic grasses tend to yield lobate phytoliths with very short shank, whereas typical xerophytic grasses tend to produce lobate phytoliths with a very long shank. The potential link between phytolith morphology, grass taxonomy and environmental conditions opens the possibility that phytolith morphology may be used as a proxy in palaeoclimatic reconstruction. |
| WOS关键词 | MAIZE CULTIVATION ; ASSEMBLAGES ; POLLEN ; CLASSIFICATION ; INDICATORS ; HOLOCENE ; ECUADOR ; AFRICA ; SOILS |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000179870000006 |
| 出版者 | BLACKWELL PUBLISHING LTD |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/78923]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Lu, HY |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Louisiana State Univ, Dept Geog & Anthropol, Baton Rouge, LA 70803 USA |
| 推荐引用方式 GB/T 7714 | Lu, HY,Liu, KB. Morphological variations of lobate phytoliths from grasses in China and the south-eastern United States[J]. DIVERSITY AND DISTRIBUTIONS,2003,9(1):73-87. |
| APA | Lu, HY,&Liu, KB.(2003).Morphological variations of lobate phytoliths from grasses in China and the south-eastern United States.DIVERSITY AND DISTRIBUTIONS,9(1),73-87. |
| MLA | Lu, HY,et al."Morphological variations of lobate phytoliths from grasses in China and the south-eastern United States".DIVERSITY AND DISTRIBUTIONS 9.1(2003):73-87. |
入库方式： OAI收割
来源：地质与地球物理研究所
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