Vegetation changes across the Eocene-Oligocene transition:Global signals vs.regional development  

作　　者：Mengxiao WU Lutz KUNZMANN Shufeng LI Vasilis TEODORIDIS Zhekun ZHOU Tao SU 

机构地区：[1]CAS Key Laboratory of Tropical Forest Ecology,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla 666303,China [2]Senckenberg Natural History Collections Dresden,Konigsbrücker LandstraBe 159,Dresden 01109,Germany [3]Department of Biology and Environmental Studies,Faculty of Education,Charles University,Magdalény Rettigové4,11639 Prague 1,Czech Republic [4]State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China [5]Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,China

出　　处：《Science China Earth Sciences》2024年第9期2937-2952,共16页中国科学（地球科学英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2022YFF0800800);the National Natural Science Foundation of China(Grant Nos.42072024&42320104005);the Sino-German(CSC-DAAD)Postdoc Scholarship Program(Grant No.57607866)。

摘　　要：The Eocene-Oligocene transition(EOT)marked a rapid global cooling event,often considered as the beginning of the modern icehouse world.Influenced by various factors,including tectonic activity and paleogeographic settings,the terrestrial records indicate a diverse response of fauna and vegetation to this global event.We examined nine macrofossil assemblages from seven fossil localities on the southeastern margin of the Tibetan Plateau and from the mid-latitudinal Europe ranging from the latest Bartonian and Priabonian(37.71-33.9 Ma)to the Rupelian(33.9-27.82 Ma).Our aims were to trace and compare the vegetation history of both regions in the late Eocene and early Oligocene.The results show that both regions experienced changes in vegetation composition in response to climate change,characterized by a decrease in the percentages of broad-leaved evergreen elements and distinctive changes in general vegetation types.A general change in the overall vegetation type from subtropical broad-leaved evergreen forests in the late Eocene to temperate broad-leaved mixed deciduous evergreen forests,or mixed mesophytic forests,in the early Oligocene is recognized in both regions.The results indicate a clear change in leaf architecture,leaf margin states,and secondary venation types in the mid-latitudinal Europe,while the results from the southeastern margin of the Tibetan Plateau show a distinct reduction in leaf size.Our data suggest that both global and regional factors played key roles in shaping the vegetation in the two regions.

关 键 词：Eocene-Oligocene transition Plant fossil PALEOCLIMATE Leaf architecture Biodiversity 

分 类 号：Q948[生物学—植物学] P534.6[天文地球—古生物学与地层学] P532[天文地球—地质学]