Relative Pollen Productivity(RPP) And Relevant Source Area Of Pollen(RSAP) Of Cold-temperate Coniferous Forest In China

Quantifying the relationship between modern pollen and vegetation is an essential precondition for quantitative reconstruction of Holocene plant cover and exploring climate change processes.In this study we used pollen counts in moss samples and vegetation data to estimate relative pollen productivity(RPP)and the relevant source area of pollen(RSAP)for11 major plant taxa of the Greater Khingan Range in coniferous forest,China.The research area of pollen-vegetation quantitative relationship is expanded,and the pollen-vegetation quantitative relationship of cold temperate coniferous forests in China are further completed.The result provides basic parameter for the future study of quantitative reconstruction of vegetation coverage in the geologic time.RSAP was estimated to 400 meters.The ranking of the RPP estimates for the 11 taxa is: Betula(1±0)> Pinus(0.501±0.034)> Ulmus(0.226±0.0526)> Alnus(0.115±0.0179)> Larix(0.071±0.0031)> Artemisia(0.031±0.0109)>Quercus(0.016±0.0084)> Poaceae(0.009±0.0015)> Salix(0.004±0.0008)> Cyperaceae(0.003±0.0008)> Ericaceae(0.00005±0.0006).The pollen productivity of tree taxa is higher than that of herbaceous taxa and shrubby taxa,which may be related to the dispersal ability of tree’s pollen.The vegetation composition reconstructed by the RPP is close to the composition of modern vegetation,indicating that the estimated RPP is reliable and can be applied to regional vegetation reconstruction.