Surface pollen in the east of Qaidam Basin |
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Authors: | CHEN Hui ZHAO Dongsheng LU Xinmiao LI Yuecong XU Qinghai LI Shuangcheng OUYANG Hua |
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Institution: | 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 |
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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. |
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Keywords: | surface pollen Detrended Correlation Analysis A/C (Artemisia/Chenopodiaceae) values Qaidam Basin |
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