Pollen assemblages of Tauber traps and surface soil samples in steppe area of northern China and their relationship with vegetation and climate
Xu QinghaiTian FangLi YuecongYang Xiaolan
1 College of Resources and Environment, Hebei Normal University, Shijiazhuang050016, Hebei
2 Hebei Key Laboratory of Environmental Change and Ecological Construction,Shijiazhuang050016, Hebei
3 Key Laboratory of Western Chinas Environmental System (Ministry of Education), Lanzhou University, Lanzhou730000, Gansu
4 Hebei Institute of Geography Sciences, Hebei Academy of Sciences, Shijiazhuang050011, Hebei
Correlation analyses have been conducted between pollen assemblages of Tauber traps and surface soil samples in the steppe area of northern China. The results indicate that the pollen assemblages from these two sampling methods have a good similarity, ie. arbors content is lower than 10%〖KG-*5〗, shrub content lower than 5% and herbs content higher than 75%. The pollen types held by all assemblages constitute 743% of the total amount. Artemisia and Chenopodiaceae are the main components of pollen assemblages. Ephedra and Nitraia usually occur in the desert steppe areas, while Stellera and Cyperaceae pollens dominate the typical steppe areas. The DCCA analyses show that pollen assemblages have the most obvious relationship with the severe cold month temperature and a more obvious relationship with the annual precipitation. The pollen components of Tauber traps are different from those of the surface soil samples. The former has more pollen types than the latter; the pollen content of Artemisia and Chenopodiaceae is lower than 70%〖KG-*5〗, while the latter higher than 70%. The pollen content of the desert steppe areas is lower than that of the typical steppe areas, which indicates vegetations are well developed in the typical steppe areas and their pollen production higher than the desert steppe areas, the pollen density of the surface soil samples in typical steppe area is obviously higher than in desert steppe areas which is due to the well developed vegetation and higher pollen production of the desert steppe area, and the poor preservation of the pollens in the desert steppe area. The Tauber traps samples and surface soil samples both can distinguish desert steppe area from typical steppe area, while cross experiment results of Tauber traps sample are better than surface soil samples.
About author: Xu Qinghai, born in 1951, graduated from Department of Geology and Geography, Peking University in 1979. Now he is a professor at Hebei Normal University, and is mainly engaged in researches of palynology and global climate change.
Cite this article:
. Pollen assemblages of Tauber traps and surface soil samples in steppe area of northern China and their relationship with vegetation and climate[J]. JOURNAL OF PALAEOGEOGRAPHY, 2009, 11(1): 81-90.
. Pollen assemblages of Tauber traps and surface soil samples in steppe area of northern China and their relationship with vegetation and climate[J]. JOPC, 2009, 11(1): 81-90.