地理学报(英文版)

Journal of Geographical Sciences ›› 2006, Vol. 16 ›› Issue (4): 439-446.doi: 10.1007/s11442-006-0407-5

• Climate and Environmental Change • Previous Articles     Next Articles

Surface pollen in the east of Qaidam Basin

CHEN Hui1,2, ZHAO Dongsheng2, LU Xinmiao3, LI Yuecong1, XU Qinghai1, LI Shuangcheng4, OUYANG Hua2   

  1. 1. College of Resources and Environment Sciences, Hebei Normal University, Shijiazhuang 050016, China|
    2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China|
    3. Institute of Tibetan Plateau Research, CAS, Beijing 100085, China|
    4. College of Environmental Sciences, Peking University, Beijing 100871, China
  • Received:2006-06-05 Revised:2006-07-17 Online:2006-12-25 Published:2006-12-25
  • Supported by:

    Scientific research fund of Hebei Normal University, No.L2004B14; National Key Basic Research Program, No.2005CB422005; National Natural Science Foundation of China, No.90202012; No.40171095; Natural Science Foundation of Hebei Province, No.402615; Knowledge Innovation Project of CAS, No.KZCX3-SW-339

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Abstract:

Pollen analysis of 23 surface samples in the east of Qaidam Basin reveals the characteristics of pollen assemblages and their relationships with vegetation and climate. In pollen assemblages, Chenopodiaceae and Artemisia are preponderant types in all the samples, and Ephedra, Gramineae and Compositae are common types. The results of DCA (Detrended Correspondance Analysis) and Correlation Analysis show different pollen assemblages indicate different vegetations, coincided with respective vegetation types. A/C (Artemisia/Chenopodiaceae) in the desert can indicate the aridity. Depending on the aridity, the vegetation communities are divided into four groups: severe drought group, moderate drought group, slight drought group and tropophilous group. A/C value is less 0.2 in the severe drought group, 0.2–0.5 in the moderate drought group, 1.63 in the slight drought group and 5.72 slight-wetness group.

Key words: surface pollen, Detrended Correlation Analysis, A/C (Artemisia/Chenopodiaceae) values, Qaidam Basin