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干旱区石羊河流域不同植被带55个表土样的花粉分析结果显示,本流域表土花粉组合可以分为两部分,第一部分是荒漠草原带以上的山地植被花粉组合,其特征是云杉花粉占绝对优势,除森林带以外,基本不反映当地植被;第二部分是荒漠带以下的表土花粉组合,主要以灌木和草本植物花粉占优势,基本能反映当地的植被状况。影响石羊河流域表土花粉组合的主要因素是风力。主要科属花粉的浓度与植被状况对应良好,峰值区基本都位于其母体植物占优势的植被带中,但花粉百分含量受研究区气候、植被分布等因素影响,与现代植被的对应关系稍差。大部分灌木和草本花粉的含量变化基本能反映植被,但乔木花粉含量不能正确反映森林分布状况。
The pollen analysis of 55 topsoil samples from different vegetations in the Shiyang River Basin shows that the topsoil pollen assemblage can be divided into two parts. The first part is the mountain vegetation pollen assemblage above the desert steppe belt, which is characterized by spruce pollen The second part is the topsoil pollen assemblage below the desert belt, mainly dominated by shrubs and herbaceous pollen, which can basically reflect the status of the local vegetation. The main factor affecting the topsoil pollen assemblage in Shiyang River Basin is wind power. The main pollen concentration and vegetation status correspond well, and the peak areas are basically located in the vegetation belts dominated by their maternal plants. However, the pollen percentage is affected by the climatic and vegetation distribution in the study area and is slightly related to the modern vegetation difference. Most shrubs and herbaceous pollen content changes reflect the basic vegetation, but the arbor pollen content does not correctly reflect the distribution of forests.