黄土地层中正构烷烃记录古植被变化研究进展

有关黄土高原历史时期原生植被类型的研究不仅具有重要的理论意义,也具有现实的指导意义。对黄土有机质稳定碳同位素的研究可以部分地重建过去的植被类型变化历史;并可探讨与此有关的气候、环境问题。作为一种分布于黄土地层中的分子化石,最近几年的研究显示了正构烷烃在古植被恢复等方面的作用,使其成为一种研究黄土古植被演化方面的新的代用指标,在恢复黄土地区古植被乃至生态环境恢复方面有广阔的应用前景。

Progress of Paleovegetation Changes on n-Alkanes Distribution as Indicator in Loess Deposite

Chinese Loess Plateau(CLP),located in the northwest inland,is a sensitive area to climatic and environmental change and weak change of climate and environment can result in strong landscape change.The research on of n-alkanes Chinese Loess can partly reconstruct paleovegetation type and indicate the relationships between climate and environment related to paleovegetation.As one of biomarkers distributed in loess layers,n-alkanes can be seen as one useful biomarker in paleovegetation changes in recent years.As one new proxy to be used to study paleovegetation changes,it can be seen that n-alkanes will have a vast application prospect in the future study on paleovegetation changes and even environment changes.