The surface pollen and relative pollen production of the desert vegetation of the Alashan Plateau, western Inner Mongolia

摘要

This preliminary investigation focuses on the comparison of the recent pollen precipitation and its related vegetation of eight different plant communities in the Alashan Region, the most western part of the Inner Mongolia Autonomous Region. Most zonal and azonal communities can be well identified by their pollen spectra. Relative pollen production factors of various plant taxa have been calculated and the following sequences from over- to under represented taxa have been found for zonal vegetation: Chenopodiaceae, Artemisia, Ephedra, Nitraria, Reaumuria, Calligonum, Zygo-phyllum; and for azonal vegetation: Peganum, Populus, Tamarix, Lycium.