| 中国北方草原区捕捉器样品与表土样品花粉组合及其与植被和气候的关系 |
| |
| 引用本文： | 许清海,田芳,李月丛,阳小兰.中国北方草原区捕捉器样品与表土样品花粉组合及其与植被和气候的关系[J].古地理学报,2009,11(1):81-90. |
| |
| 作者姓名： | 许清海 田芳 李月丛 阳小兰 |
| |
| 作者单位： | 1.河北师范大学资源与环境科学学院， 河北石家庄050016;2.河北省环境演变与生态建设实验室， 河北石家庄050016;3.兰州大学西部环境教育部重点实验室， 甘肃兰州730000;4.河北省地理科学研究所， 河北石家庄050011 |
| |
| 基金项目： | 国家自然科学基金重点项目，国家自然科学基金项目，科学技术部基础研究重大项目前期研究专项项目，河北省博士基金项目，教育部博士点专项科研基金项目，河北省自然科学基金项目，河北省高校重点学科建设项目联合资助 |
| |
| 摘 要： | 中国北方草原区捕捉器样品与表土样品中的花粉组合对比研究表明，两种取样方法获得的花粉组合相似性较好，乔木花粉含量多低于10％〖KG-*5〗， 灌木花粉含量多低于5％〖KG-*5〗，草本花粉含量多高于75％；共有的花粉种类占总花粉种类数的743％；蒿属和藜科是花粉组合的最主要成分；荒漠草原区常见麻黄和白刺花粉，典型草原区多为狼毒和莎草科花粉。花粉组合与气候关系的DCCA（降趋典型对应分析）分析结果显示，花粉组合与最冷月温度的相关性最显著，其次为年降水量。捕捉器样品与表土样品中的花粉组成也存在一定差异，表现为前者较后者出现更多的花粉类型，前者的蒿属、藜科花粉含量低于70％〖KG-*5〗，后者的则高于70％。荒漠草原区花粉通量低于典型草原区，反映典型草原区植被较荒漠草原区发育，花粉产量高于荒漠草原区。典型草原区表土花粉浓度也明显高于荒漠草原区（高一数量级），除典型草原区植被发育、花粉产量高的原因外，荒漠草原区不利于花粉保存，也是造成花粉浓度低的另一个重要原因。花粉组合判别分析表明，捕捉器样品和表土样品均能较好地区分出荒漠草原与典型草原，但捕捉器样品交叉检验结果好于表土样品。
|
| 关 键 词： | 中国北方 草原区 表土花粉 捕捉器花粉 花粉通量 判别分析 |
Pollen assemblages of Tauber traps and surface soil samples in steppe area of northern China and their relationship with vegetation and climate |
| |
| Xu QinghaiTian FangLi YuecongYang Xiaolan.Pollen assemblages of Tauber traps and surface soil samples in steppe area of northern China and their relationship with vegetation and climate[J].Journal of Palaeogeography,2009,11(1):81-90. |
| |
| Authors: | Xu QinghaiTian FangLi YuecongYang Xiaolan |
| |
| Institution: | 1.College of Resources and Environment， Hebei Normal University， Shijiazhuang050016， Hebei;2.Hebei Key Laboratory of Environmental Change and Ecological Construction，Shijiazhuang050016， Hebei;3.Key Laboratory of Western Chinas Environmental System （Ministry of Education）， Lanzhou University， Lanzhou730000， Gansu;4.Hebei Institute of Geography Sciences， Hebei Academy of Sciences， Shijiazhuang050011， Hebei |
| |
| Abstract: | Correlation analyses have been conducted between pollen assemblages of Tauber traps and surface soil samples in the steppe area of northern China. The results indicate that the pollen assemblages from these two sampling methods have a good similarity， ie. arbors content is lower than 10％〖KG-*5〗， shrub content lower than 5％ and herbs content higher than 75％. The pollen types held by all assemblages constitute 743％ of the total amount. Artemisia and Chenopodiaceae are the main components of pollen assemblages. Ephedra and Nitraia usually occur in the desert steppe areas， while Stellera and Cyperaceae pollens dominate the typical steppe areas. The DCCA analyses show that pollen assemblages have the most obvious relationship with the severe cold month temperature and a more obvious relationship with the annual precipitation. The pollen components of Tauber traps are different from those of the surface soil samples. The former has more pollen types than the latter; the pollen content of Artemisia and Chenopodiaceae is lower than 70％〖KG-*5〗， while the latter higher than 70％. The pollen content of the desert steppe areas is lower than that of the typical steppe areas， which indicates vegetations are well developed in the typical steppe areas and their pollen production higher than the desert steppe areas， the pollen density of the surface soil samples in typical steppe area is obviously higher than in desert steppe areas which is due to the well developed vegetation and higher pollen production of the desert steppe area， and the poor preservation of the pollens in the desert steppe area. The Tauber traps samples and surface soil samples both can distinguish desert steppe area from typical steppe area， while cross experiment results of Tauber traps sample are better than surface soil samples. |
| |
| Keywords: | DCCA |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《古地理学报》浏览原始摘要信息 |
| 点击此处可从《古地理学报》下载免费的PDF全文 |
