河北卢龙饮马河流域全新世冲积物孢粉分析及对全新世植被时空变化的初步探讨

 依据河北省卢龙县闫深港4.6m厚的冲积物剖面，揭示了较高时间分辨率的孢粉分析，参照现代冲积物孢粉与植被的对应关系，探讨了距今11000年以来饮马河流域植被的时空变化。11000～9000aBP的森林覆盖率约10％，9000～7000aBP约30％～40％，7000～4000aBP约20％～40％，3000～2500aBP约10％～20％。在9000aBP左右出现了云杉、冷杉花粉的高峰值，表明饮马河流域曾出现垂直植被带的变化。

Spatial and Temporal Holocene Vegetation Change From Alluvium Pollen Analysis in the Yinma River Basin of Hebei Province

Spatial and temporal changes in vegetation patterns of the Yinma River Basin were reconstructed using analysis of modern pollen-vegetation type relationships and a pollen core. This 4. 6 m alluvial section was collected Yanshen Port in Lulong county, Hebei province. Forest coverage in 11000-9000 aBP was about 10% and this increased to 20%-40% in 9000-4000 aBP. During 3000～2500 aBP the forest coverage decreased to 10%～20%. The large quantity of Picea and Abies pollen found about 9000 aBP, indicates that movement in the altitudinal zonation of vegetation occurred in Yinma River Basin at around this time.