气候变化领域集成服务门户(CCPortal): Vegetation Reconstruction From Siberia and the Tibetan Plateau Using Modern Analogue Technique-Comparing Sedimentary (Ancient) DNA and Pollen Data

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DOI	10.3389/fevo.2021.668611
	Vegetation Reconstruction From Siberia and the Tibetan Plateau Using Modern Analogue Technique-Comparing Sedimentary (Ancient) DNA and Pollen Data
	Liu, Sisi; Li, Kai; Jia, Weihan; Stoof-Leichsenring, Kathleen Rosmarie; Liu, Xingqi; Cao, Xianyong; Herzschuh, Ulrike
通讯作者	Liu, SS ; Herzschuh, U (通讯作者)
发表日期	2021
ISSN	2296-701X
卷号	9
英文摘要	To reconstruct past vegetation from pollen or, more recently, lake sedimentary DNA (sedDNA) data is a common goal in palaeoecology. To overcome the bias of a researcher's subjective assessment and to assign past assemblages to modern vegetation types quantitatively, the modern analogue technique (MAT) is often used for vegetation reconstruction. However, a rigorous comparison of MAT-derived pollen-based and sedDNA-based vegetation reconstruction is lacking. Here, we assess the dissimilarity between modern taxa assemblages from lake surface-sediments and fossil taxa assemblages from four lake sediment cores from the south-eastern Tibetan Plateau and northern Siberia using receiver operating characteristic (ROC) curves, ordination methods, and Procrustes analyses. Modern sedDNA samples from 190 lakes and pollen samples from 136 lakes were collected from a variety of vegetation types. Our results show that more modern analogues are found with sedDNA than pollen when applying similarly derived thresholds. In particular, there are few modern pollen analogues for open vegetation such as alpine or arctic tundra, limiting the ability of treeline shifts to be clearly reconstructed. In contrast, the shifts in the main vegetation communities are well captured by sedimentary ancient DNA (sedaDNA). For example, pronounced shifts from late-glacial alpine meadow/steppe to early-mid-Holocene coniferous forests to late Holocene Tibetan shrubland vegetation types are reconstructed for Lake Naleng on the south-eastern Tibetan Plateau. Procrustes and PROTEST analyses reveal that intertaxa relationships inferred from modern sedaDNA datasets align with past relationships generally, while intertaxa relationships derived from modern pollen spectra are mostly significantly different from fossil pollen relationships. Overall, we conclude that a quantitative sedaDNA-based vegetation reconstruction using MAT is more reliable than a pollen-based reconstruction, probably because of the more straightforward taphonomy that can relate sedDNA assemblages to the vegetation surrounding the lake.
关键词	HOLOCENE VEGETATION HENGDUAN MOUNTAINS ARCTIC VEGETATION LAKE-SEDIMENTS CLIMATE-CHANGE TUNDRA SHIFTS PLEISTOCENE VARIABILITY DIVERSITY
英文关键词	vegetation reconstruction; plant sedimentary (ancient) DNA metabarcoding; pollen; analogue matching; Late Glacial; Holocene; northern Siberia; China
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:000656872200001
来源期刊	FRONTIERS IN ECOLOGY AND EVOLUTION
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260436
推荐引用方式 GB/T 7714	Liu, Sisi,Li, Kai,Jia, Weihan,et al. Vegetation Reconstruction From Siberia and the Tibetan Plateau Using Modern Analogue Technique-Comparing Sedimentary (Ancient) DNA and Pollen Data[J]. 中国科学院青藏高原研究所,2021,9.
APA	Liu, Sisi.,Li, Kai.,Jia, Weihan.,Stoof-Leichsenring, Kathleen Rosmarie.,Liu, Xingqi.,...&Herzschuh, Ulrike.(2021).Vegetation Reconstruction From Siberia and the Tibetan Plateau Using Modern Analogue Technique-Comparing Sedimentary (Ancient) DNA and Pollen Data.FRONTIERS IN ECOLOGY AND EVOLUTION,9.
MLA	Liu, Sisi,et al."Vegetation Reconstruction From Siberia and the Tibetan Plateau Using Modern Analogue Technique-Comparing Sedimentary (Ancient) DNA and Pollen Data".FRONTIERS IN ECOLOGY AND EVOLUTION 9(2021).