TY  - JOUR
A1  - Xu, QingHai
A1  - Cao, Xianyong
A1  - Tian, Fang
A1  - Zhang, ShengRui
A1  - Li, YueCong
A1  - Li, ManYue
A1  - Li, Jie
A1  - Liu, YaoLiang
A1  - Liang, Jian
T1  - Relative pollen productivities of typical steppe species in northern China and their potential in past vegetation reconstruction
T2  - Science China
N2  - The Relative Pollen Productivities (RPPs) of common steppe species are estimated using Extended R-value (ERV) model based on pollen analysis and vegetation survey of 30 surface soil samples from typical steppe area of northern China. Artemisia, Chenopodiaceae, Poaceae, Cyperaceae, and Asteraceae are the dominant pollen types in pollen assemblages, reflecting the typical steppe communities well. The five dominant pollen types and six common types (Thalictrum, Iridaceae, Potentilla, Ephedra, Brassicaceae, and Ulmus) have strong wind transport abilities; the estimated Relevant Source Area of Pollen (RSAP) is ca. 1000 m when the sediment basin radius is set at 0.5 m. Ulmus, Artemisia, Brassicaceae, Chenopodiaceae, and Thalictrum have relative high RPPs; Poaceae, Cyperaceae, Potentilla, and Ephedra pollen have moderate RPPs; Asteraceae and Iridaceae have low RPPs. The reliability test of RPPs revealed that most of the RPPs are reliable in past vegetation reconstruction. However, the RPPs of Asteraceae and Iridaceae are obviously underestimated, and those of Poaceae, Chenopodiaceae, and Ephedra are either slightly underestimated or slightly overestimated, suggesting that those RPPs should be considered with caution. These RPPs were applied to estimating plant abundances for two fossil pollen spectra (from the Lake Bayanchagan and Lake Haoluku) covering the Holocene in typical steppe area, using the "Regional Estimates of Vegetation Abundance from Large Sites" (REVEALS) model. The RPPs-based vegetation reconstruction revealed that meadow-steppe dominated by Poaceae, Cyperaceae, and Artemisia plants flourished in this area before 6500-5600 cal yr BP, and then was replaced by present typical steppe.
KW  - typical steppe
KW  - modern surface pollen
KW  - relative pollen productivity
KW  - relevant pollen source area
KW  - paleovegetation
Y1  - 2014
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/37818
SN  - 1674-7313
SN  - 1869-1897
VL  - 57
IS  - 6
SP  - 1254
EP  - 1266
PB  - Science China Press
CY  - Beijing
ER  -