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首页> 外文期刊>Chinese science bulletin >Pollen transport in the Shiyang River drainage, arid China
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Pollen transport in the Shiyang River drainage, arid China

机译：中国干旱地区石羊河流域的花粉运输

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摘要

In order to assess the contribution of the pollen transported by wind and fluvial flows to the pollen spectra in Shiyang River drainage, a typical small endorheic drainage in arid lands of northwest China, preliminary studies on modern pollen rain along two transects with 91 surface soil samples, 8 atmospheric samples, 30 modern fluvial flow samples and 50 riverbed mud samples, were carried out. Results show that dispersal agents (air, flowing water) have dissimilar effects on transport of pollen and the structure of pollen spectra. Fluvial flow has a stronger capacity than wind to transport large quantities of pollen over long distances. Pollen transported by fluvial flow makes a large contribution to the pollen spectra of riverbed alluvial sediments. Paleoenvironmental reconstructions undertaken using pollen spectra from fluvial sediments in arid lands are strongly influenced by pollen transport. Therefore, the sources, the transportation agents and the depositional condition of pollen should be systematically investigated before pollen assemblages are used to derive the environmental significance in such settings.
机译：为了评估风和河流流动的花粉对石羊河流域花粉光谱的贡献，石羊河流域是中国西北干旱地区典型的小内吸排水，对沿两个样带的91个表层土壤样品进行现代花粉雨的初步研究进行了8个大气样品，30个现代河流流量样品和50个河床泥浆样品。结果表明，分散剂（空气，流动的水）对花粉的运输和花粉光谱的结构具有不同的影响。与长距离输送大量花粉相比，河流的流动能力强于风。河流流运的花粉对河床冲积沉积物的花粉光谱有很大贡献。利用干旱地区河流沉积物的花粉光谱进行的古环境重建受花粉运输的强烈影响。因此，在使用花粉组合物推导这种环境的环境意义之前，应系统地研究花粉的来源，运输媒介和沉积条件。

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