【摘要】 本文通过对大布苏泡子第10地点孢粉分析,自下而上划分为二个孢粉组合带:下段(1-2层)Equisetum-Isoites 孢粉带;上段(3-6层)Ranunculaceae-Chenopodiaceae-Artemisia孢粉带。根据孢粉组合带分析了晚全新世中晚期本区泡子周围古地理环境,认为至少发生两次明显变化,即植被从喜湿性蕨类植物占优势的温带湿草甸,向耐干旱、耐盐碱的草本植物为主的草甸草原的转化;气候由湿润到干旱,水体由淡水湖向碱水湖的转化。更多还原

【Abstract】 According to the sporo-pollen analysis of the ten localities in Dabusu lake,it could be divid- ed into two sporo-pollen assemblage zones from bottom to top:the lower series (1—2 bed) of Equisetum,Isoites sporo-pollen zone and upper series (3—6 bed) of Ranunculaceae,Chenopo- diaceae,Aritemisia sporo-pollen zone.This paper deals also with the course that in the middle later period of the later Holocene Epoch the obvious change of paleogeographic environment is no less than twice in the area surounding Dabusu lake.As for the vegetation,the wet grassy marshland of temperate zone in which the pteridophyta Predominated turned towards meadow -steppe in which herbs predominated.While the wet climate turned towards arid climate and the fresh water lake turned towards salt lake.更多还原