NDLI: Surface pollen and its relationship to vegetation on the southern slope of the eastern Qilian Mountains

Content Provider	Springer Nature Link
Author	Lu, Xinmiao Chen, Hui Xu, Qinghai
Copyright Year	2006
Abstract	The objective of this study is to investigate pollen-vegetation relationship in the Qilian Mountains. The eastern Qilian Mountains are located in the transitional zone of the Tibetan Plateau, the Loess Plateau and the arid region of Northwest China, which is one of the key areas of global environmental change. A total of 13 surface pollen samples from main vegetation have been collected. Pollen percentages were calculated in all samples. In order to reveal the relationship between pollen composition and the vegetation types from which the soil samples have been collected, Detrended Correspondence Analysis (DCA) ordination method was employed on the pollen data. The results show that dominating vegetation types can be recognized by their pollen spectra: Picea crassifolia forest, alpine shrub and alpine meadow as well. Altitude and temperature determine the distribution of the surface pollen and the vegetation. The good agreement between modern vegetation and surface samples across this area provides a measure of the reliability of using pollen data to reconstruct paleoenvironment and paleovegetation patterns in this or other similar regions. However the loss of Betula pollen in forest needs further investigation. Pollen oxidation is the most important factor contributing to the damage of modern pollen in the study area. Pollen concentrations decrease with the increase of pH values of soils, and decrease sharply when the pH exceeds 7.6.
Starting Page	215
Ending Page	222
Page Count	8
File Format	PDF
ISSN	1009637X
Journal	Journal of Geographical Sciences
Volume Number	16
Issue Number	2
e-ISSN	18619568
Language	English
Publisher	Science in China Press
Publisher Date	2006-01-01
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	surface pollen vegetation DCA Qilian Mountains Tibetan Plateau Remote Sensing/Photogrammetry Geographical Information Systems/Cartography Physical Geography Nature Conservation
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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