Journal
SCIENCE IN CHINA SERIES D-EARTH SCIENCES
Volume 52, Issue 10, Pages 1510-1519Publisher
SCIENCE PRESS
DOI: 10.1007/s11430-009-0150-8
Keywords
Lake Qinghai basin; modern pollen; pollen sources; dominant factors
Categories
Funding
- National Natural Science Foundation of China [40599423]
- National Basic Research Program of China [2004CB720202]
- West Light Foundation
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Lake Qinghai is the largest inland brackish lake in China and lies within the NE Tibetan Plateau. Our study shows that pollen assemblages in each vegetation belt are significantly correlated with the vegetation types of this area. Among the herbaceous and shrubby pollen assemblages, Artemisia is over-represented, while Poaceae, Cyperaceae and Polygonaceae are under-represented. Artemisia/Chenopodiaceae (A/C) ratios with the regional vegetation characteristic can be used as a proper index to reconstruct the history of vegetation and climate in Lake Qinghai basin. Modern pollen in the lake mainly comes from the nearby vegetation, controlled by the directions and velocity of the wind. The distribution of modern pollen in Lake Qinghai tends to be similar in most part of the lake. The difference of pollen sedimentation process in the lake can be potentially influenced by the focusing function of the lake, river streams, and lake current.
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