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| 东祁连山表土花粉组合及其数量特征 | |
| 引用本文： | 吕新苗,陈辉,李双成,郑度.东祁连山表土花粉组合及其数量特征[J].山地学报,2004,22(2):199-206. |
| 作者姓名： | 吕新苗 陈辉 李双成 郑度 |
| 作者单位： | 1. 中国科学院地理科学与资源研究所,北京,100101 2. 中国科学院地理科学与资源研究所,北京,100101;河北师范大学,河北,石家庄,050016 3. 北京大学城市与环境学系,北京,100871 |
| 基金项目： | 国家自然科学基金重点项目(40331006)，国家重点基础研究发展规划项目(G1998040800)~~ |
| 摘 要： | 应用TWINSPAN分类和DCA排序对东祁连山地区7个不同植被类型的表土花粉组合及其与环境的关系进行定量研究。表土花粉类型可分为3组：Group1为花粉产量大的本地花粉，可较好地反映当地植被的特征；Group2为产量小的本地花粉，反映植被特征较差；Group3为外来花粉，在土壤地层中较常见。样地排序结果可划分出6个组：(1)山地草原化荒漠，(2)青海云杉林，(3)祁连圆柏林，(4)金露梅灌丛，(5)矮嵩草草甸，(6)小嵩草草甸，各组具有不同的花粉组合特征；但山杨—白桦林可能是由于花粉自身和花粉保存等原因，花粉组合无突出特征，难以区分。海拔高度和干燥度是影响表土花粉和植被分布的重要因素。藜科／蒿属(C／A)、木本花粉／非木本花粉(AP／NAP)随植被变化也反映出与植被分布的一致性。 |
| 关 键 词： | 表土花粉 花粉组合 数量特征 分类和排序 东祁连山 |
| 文章编号： | 1008-2786(2004)02-0199-08 |
| 修稿时间： | 2003年8月11日 |
Surface Pollen Assemblages and Quantitative Characteristics in Eastern Qilian Mountains |
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| Lu Xinmiao,CHEN Hui,LI Shuangcheng,ZHENG Du.Surface Pollen Assemblages and Quantitative Characteristics in Eastern Qilian Mountains[J].Journal of Mountain Research,2004,22(2):199-206. | |
| Authors: | Lu Xinmiao CHEN Hui LI Shuangcheng ZHENG Du |
| Abstract: | A total of 22 surface pollen samples from seven types of vegetation have been collected in eastern Qil-ian Mountains in the northeast of Qinghai-Tibet Plateau, Pollen percentages and pollen concentrations are calculated in all samples. The dominant pollen types in the region are Chenopodiaceae, Artemisia, Cyperaceae, Rosaceae, Compositae, Cruciferae, Gramineae, etc. In order to reveal the relationship between pollen composition and the vegetation type from which the soil samples have been collected, TWINSPAN(Two-way Indicator Species Analysis) classification and DCA(Detrended Correspondence Analysis) ordination are employed on the pollen data. The surface pollen could be classified into three groups: Group 1 is the associative group which could accurately reflect the local vegetation; Group 2 is under-representative group in which have low pollen percentage outproportional to vegetation; Group 3 is an over-representative group in which pollen is easily obtainable in soil where plant directly grow from. The study also shows that the six major vegetation types could be distinguished by pollen composition: Picea crassifolia, forest, Sabina przewalskii forest, Kobresia pygmaea meadow, Kobresia. humilis meadow, Dastphora fruticosa shrub, except Populus davidiana-Betula platyphylla. mixed forest because of the pollen characters and its deposit conditions. We also find, that it is the altitude and aridity that determine the distribution of the surface pollen and the vegetation. Besides, the pollen ratios of Chenopodiaeeae/Artemisia(C/A)and Arboreal plant/Non-arboreal plant(AP/NAP) change accordingly with vegetation zones. Therefore, it will be possible to apply the module to reconstruct past vegetation and environment in this or other similar regions. |
| Keywords: | Surface pollen pollen assemblage quantitative character classification and ordination eastern Qil-ian Mountains |
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