Abstract：Twenty-four water samples were collected from the Yellow River at Lanzhou station from September in 2011 to June in 2012. Based on the pollen analysis, the temporal change characteristics and accumulated pollen features of the waterborne pollen were discussed. The result shows that pollen assemblages and pollen concentration have obvious changes over time:Ulmus,Populus,Salix and Betula are the major components of the pollen assemblages in the spring and summer;and Artemisia and Chenopodiaceae are main species in the autumn and winter. Pollen concentration has a positive correlation with waterborne sediment concentration. There are obvious differences between pollen assemblages of individual samples and the accumulated pollen assemblage,and pollen assemblages of individual samples cannot reflect regional plant communities. Accumulated pollen assemblage can basically represent the vegetation status of loess area from Liujiaxia reservoir to Lanzhou where it is suggested to be the main pollen and sediment source area in this study site.
基金资助:国家自然科学基金项目(编号:41171168)资助。[Financially supported by the National Natural Science Foundation of China(No.41171168)]
通讯作者:
黄小忠,男,1977年生,兰州大学副教授,主要从事第四纪孢粉学与古环境研究。E-mail: xzhuang@lzu.edu.cn。*国家自然科学基金项目(编号:41171168)资助。[Financially supported by the National Natural Science Foundation of China(No.41171168)]
Peng Wei,Lin Xueru, Huang Xiaozhong et al. Preliminary study on assemblages characteristics of waterborne pollen and accumulated pollen from the Yellow River at Lanzhou station[J]. JOPC, 2016, 18(4): 691-704.
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