Relationship between pollen assemblages and vegetation in alluvial sediments of Luan he River Basin
Xu Qinghai Yang Xiaolan Yang Zhenjing
1 College of Resources and Environment, Hebei Normal University, Shijiazhuang 050016 Hebei
2 Hebei Institute of Geography, Shijiazhuang 050011 Hebei
3 Institute of Botany,Chinese Academy of Sciences Beijing 100093
Studies on alluvial pollen from 13 hydrological stations in different river flow periods（low river flow, flood, normal river flow）show that alluvial pollen assemblages are influenced by florescence changes of the plants growing in the Luan he River Basin Arboreal pollen percentage was higher than that of herb pollen during the low river flow period, which corresponded with the flowering period of most trees in spring Herb pollen percentage was higher than that of arboreal pollen during the normal river flow period, which corresponded with the flowering period of most herbs in late summer and autumn Herb pollen percentage was slightly higher than that of arboreal pollen during the flood period Arboreal pollen in alluvium mainly came from the surface pollen fallen on the ground in spring which was carried by sheet flow during the floodsAlluviums in Yanshan area are mainly formed by floodsTherefore, 20%～40% aboreal pollen of alluvial pollen assemblages during the floods represent 20%～25% of forest cover of Yanshan area This is a useful reference to reconstruct forest cover quantitatively
About author: Xu Qinghai,born in 1951,was graduated from Department of Geology,Peking University in 1979Now he is a professor in College of Resources and Environment,Hebei Normal University,and has been engaged in Quarternary geology,global change and pollen analysis
Cite this article:
. Relationship between pollen assemblages and vegetation in alluvial sediments of Luan he River Basin[J]. JOURNAL OF PALAEOGEOGRAPHY, 2004, 6(1): 69-77.
. Relationship between pollen assemblages and vegetation in alluvial sediments of Luan he River Basin[J]. JOPC, 2004, 6(1): 69-77.
