Vegetation history of the central Tibetan region during the late Oligocene-Early Miocene  

作　　者：Xin-Wen Zhang Jia Liu Robert A.Spicer Yi Gao Xuan-Rong Yao Xing-Yuan Qin Zhe-Kun Zhou Tao Su 

机构地区：[1]State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation&Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,China [2]Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural Resources,Chengdu University of Technology,Chengdu 610059,China [3]CAS Key Laboratory of Tropical Forest Ecology,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla 666303,China [4]School of Environment,Earth and Ecosystem Sciences,The Open University,Milton Keynes MK76AA,UK [5]State Key Laboratory of Tibetan Plateau Earth System,Resources and Environment(TPESRE),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China

出　　处：《Journal of Systematics and Evolution》2025年第1期39-52,共14页植物分类学报(英文版)

基　　金：supported by National Natural Science Foundation of China(42425201,42402014);Basic Science Center for Tibetan Plateau Earth System(BSCTPES,NSFC project 41988101);the Second Tibetan Plateau Scientific Expedition program(2019QZKK0705);the Young Talents Special Foundation of Chengdu University of Technology(21700-000526-01).

摘　　要：Understanding the Cenozoic vegetation history of what is now the Qinghai-Tibetan Plateau is crucial for elucidating the co-evolutionary dynamics between plateau development,its environment,and the organisms it hosts.In this study,we conduct a comprehensive analysis of phytoliths within the late Oligocene-Early Miocene lacustrine sedimentary section of the Lunpola Basin,central Qinghai-Tibetan Plateau.The diverse phytolith morphotype assemblages indicate that the vegetation of the central Tibetan region mainly comprised a mixed coniferous and broad-leaved forest.Grasses in the understory primarily consisted of Pooideae,distinguished by phytolith morphotypes such as rondel,crenate and Stipa-type bilobate forms.Combined with previous work,we infer that riparian vegetation of the central Tibetan region transitioned from a humid subtropical forest,dominated by broad-leaved woody plants during the middle Eocene,to a more seasonally arid open woodland containing abundant woody and herbaceous plants during the late Eocene,before developing into a cooler mixed coniferous and broad-leaved forest during the late Oligocene-Early Miocene.The growth of the central Tibetan region and retreat of the Tethys Ocean,together with the uplift of the Himalaya,contributed to this vegetation change.This study provides new evidence from the phytolith perspective for the evolutionary history of Qinghai-Tibetan Plateau vegetation being tied to plateau formation and regional climate change.

关 键 词：late Oligocene-Early Miocene Lunpola Basin PHYTOLITH Qinghai-Tibetan Plateau vegetation change 

分 类 号：Q914[天文地球—古生物学与地层学]