CHARACTERISTICS OF POLLEN ASSEMBLAGES IN SURFACE SOILS IN THE MAQU-HONGYUAN AREA, ZOIGÊ PLATEAU, NORTHERN SICHUAN

CAI Yao; WANG Yan; Jiang Fu-chu; LI Chao-zhu

Volume 13 Issue 4

Dec. 2007

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CAI Yao, WANG Yan, Jiang Fu-chu, et al., 2007. CHARACTERISTICS OF POLLEN ASSEMBLAGES IN SURFACE SOILS IN THE MAQU-HONGYUAN AREA, ZOIGÊ PLATEAU, NORTHERN SICHUAN. Journal of Geomechanics, 13 (4): 333-339.

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CHARACTERISTICS OF POLLEN ASSEMBLAGES IN SURFACE SOILS IN THE MAQU-HONGYUAN AREA, ZOIGÊ PLATEAU, NORTHERN SICHUAN

Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

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Received: 2007-10-12
Published: 2007-12-01

Abstract

Abstract

In order to investigate the relationship between the surface pollen and modern vegetation, 20 surface soil samples collected from the Maqu-Hongyuan area on the Zoigê Plateau, Sichuan, were analyzed and the relationship between the surface pollen assemblages and modern vegetation in the study area were studied.The results show that the surface pollen assemblages in the area approximately reflect the whole features of the modern vegetation and are basically similar to the features of the modern vegetation in respect to vegetation types, spatial arrangement of vegetation zones and main assemblageestablished and dominant genera and species.Three vegetation zones may be distinguished by pollen percentages; they are the subalpine shrub, subalpine shrub and subalpine meadow, and alpine meadow and steppe vegetation zones.The representation of surface pollen varies with genera and species.Pinus and Compositae pollen are overrepresented and Picea pollen is moderately represented, while Gramineae and Cyperaceae pollen are underrepresented.Betula pollen is not overrepresented, which is possibly due to difficulty in transport.The genera and percentages of the surface pollen in the three vegetation zones show certain difference from those of the modern vegetation, which may be related to vegetation degeneration.
- Zoigê Plateau,
- surface pollen assemblage,
- pollen analysis,
- vegetation,

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References(17)

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