Vegetation changes and human influences on natural environments since 5 000 aBP were discussed based on the pollen data supported by radiocarbon dating from Cangumiao and Yujiawa profiles in Qian‘an Basin, the southern area of Yanshan Mountain. The research indicates that (1) from 4 600 to 3 100 aBP, deciduous broad leaved forests dominated by Quercus grew in the Basin, (2) after 3 100 aBP, broad leaved species reduced and Pinus increased, in response to the cooling climate, (3) since 1 600 aBP, forests had been destroyed seriously due to the increase of agricultural activities, and (4) pollen analysis showed that Castanea trees had been cultivated for 1 600 years, and Oryzahad been planted for 700 years in Qian’an Basin.
河北迁安盆地中全新世以来的植被变化及人类活动的影响
许清海1,2孔昭宸1*阳小兰2 梁文栋3 孙黎明4
（1. 中国科学院植物研究所，北京100093:2. 河北省科学院地理研究所，石家庄050011；
3. 中国科学院地质与地球物理研究所，北京100029；4. 石家庄经济学院，石家庄050031）
摘要： 依据位于燕山南部迁安盆地蚕姑庙村和余家洼村具放射性碳年代测定支持的埋藏泥炭剖面的孢粉分析资料 ,揭示了迁安盆地 5 0 0 0aBP以来自然植被变化和人类活动对自然环境的影响。在 4 6 0 0～ 310 0aBP期间 ,迁安盆地曾经生长着以栎为主的落叶阔叶林 ,至 310 0aBP以后 ,森林中阔叶树成分显著下降 ,喜凉耐干的松树比例增加 ,16 0 0aBP后 ,迁安盆地人类农耕活动进一步加剧 ,森林遭受到大规模的破坏。孢粉分析资料揭示迁安盆地人类栽培板栗的历史可以追溯到 16 0 0aBP左右 ,种植水稻的历史可以追溯到 70 0aBP左右
关键词： 迁安盆地；孢粉分析；人类农耕活动
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