河北阜城地区晚第四纪孢粉组合及其古植被和古气候演替

通过对阜城地区阜101孔孢粉研究,划分出三个孢粉组合带,从孢粉组合特征清楚地反映出阜城地区自晚第四纪以来古植被、古气候的三个演替阶段。自下而上依次是:1.晚更新世是以松、冷杉、云杉为建群种的针、阔叶混交林-草原,此时气候冷而稍干。2.全新世中期是以松、栎、榆、桦占优势的针、阔叶混交林,为温暖、湿润的气候。3.全新世晚期是以蒿、藜、松和桦为主的疏林-草原,此时气候温凉、略干与现代相近。

Sporo-Pollen Assemblages from the Late Quaternary Sediments of Fucheng County, Hebei Province and Their Paleovegetation and Paleoclimate Succession

Through the research of spores and pollen grains from Core Fu 101 ofFucheng County, three spore-pollen zones have been distinguished, reflecting threephases of the paleovegetation succession and climate fluctuation since Late Qua-ternary of Fucheng County. These phases are in ascending order as follows: 1. Coniferous and deciduous broad-leaved mixed forest-grassland is domi-nated by Pinus, Abies and Picea with an age of Late Pleistocene, reflecting coldand a little dry climate. 2. Coniferous and deciduous broad-leaved mixed forest by the domineae ofPinus, Quercus, Ulmus and Betula etc. is considered as the Middle Holocene. Theclimate at that time was warm and moist. 3. Sparse woods-grassland of the Late Holocene is dominated by the Arte-misia, Chenopodiaceae, Pinus and Betula, reflecting that the climate was a littlecool and dry similarly to that of the present time.