The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Filed work on färskesjön 2013

Anne Birgitte Nielsen

Senior lecturer

Filed work on färskesjön 2013

Pollen assemblages and their environmental implications in the Qaidam Basin, NW China

Author

  • Shengrui Zhang
  • Qinghai Xu
  • Anne Birgitte Nielsen
  • Hui Chen
  • Yuecong Li
  • Manyue Li
  • Lingyun Hun
  • Jianyong Li

Summary, in English

The Qaidam Basin is one of the most sensitive areas to climate change in China, owing to its unique geographical position and ecological condition. In this study, 32 surface-soil pollen samples were collected to reveal the relationship between modern pollen assemblages, vegetation and precipitation in the eastern region of the Qaidam Basin. The results show that Chenopodiaceae (3.887%, average 48%), Artemisia (1.764.2%, average 17.5%) and Ephedra (090%, average 16.3%) are the dominant pollen types in all samples, and that different pollen assemblages correspond to different vegetation types. DCA and CCA of major pollen types demonstrate that precipitation is an important factor in the control of the distribution of vegetation in the study area. The content and concentration of the three major pollen types (Artemisia, Chenopodiaceae and Ephedra) change with the mean annual precipitation, and the optimum mean annual precipitation for Ephedra, Chenopodiaceae and Artemisia is <80, 80200 and >160?mm, respectively. Correlation analysis between the variation in grain size of the three major pollen types and the main environmental variables shows that the grain size of the three pollen types is positively correlated with precipitation in the Qaidam Basin. The results confirm that precipitation is the most important environmental factor in the Qaidam Basin, and that it has an important effect on pollen grain size in the study area.

Department/s

  • Quaternary Sciences

Publishing year

2012

Language

English

Pages

602-613

Publication/Series

Boreas

Volume

41

Issue

4

Document type

Journal article

Publisher

John Wiley & Sons Inc.

Topic

  • Geology

Status

Published

ISBN/ISSN/Other

  • ISSN: 1502-3885