Asymmetric biotic interchange across the Bering land bridge between Eurasia and North America  

作　　者：Dechun Jiang Sebastian Klaus Ya-Ping Zhang David M.Hillis Jia-Tang Li 

机构地区：[1]CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization&Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province,Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610041,China [2]Department of Ecology and Evolution,J.W.Goethe University,Frankfurt am Main 60438,Germany [3]State Key Laboratory of Genetic Resources and Evolution,Kunming Institute of Zoology,Chinese Academy of Sciences,Kunming 650223,China [4]CAS Center for Excellence in Animal Evolution and Genetics,Chinese Academy of Sciences,Kunming 650223,China [5]Department of Integrative Biology and Biodiversity Center,University of Texas at Austin,Austin 78712,USA

出　　处：《National Science Review》2019年第4期739-745,共7页国家科学评论（英文版）

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(CAS)(XDB31000000)to J.-T.L.;the National Natural Science Foundation of China(31722049 and 31772434) to J.-T.L.;the Key Research Program of Frontier Sciences,CAS(QYZDBSSW-SMC058) to J.-T.L.;the CAS ‘Light of West China’Program(2018XBZG JCTD 001) to J.-T.L.;the Youth Innovation Promotion Association of CAS(2014338) to J.-T.L.;the German Research Foundation(KL2378/2-1) to S.K

摘　　要：The exchange of biotas between Eurasia and North America across the Bering land bridge had a major impact on ecosystems of both continents throughout the Cenozoic. This exchange has received particular attention regarding placental mammals dispersing into the Americas, including humans after the last glacial period, and also as an explanation for the disjunct distribution of related seed plants in eastern Asia and eastern North America. Here, we investigate bi-directional dispersal across the Bering land bridge from estimates of dispersal events based on time-calibrated phylogenies of a broad range of plant, fungus and animal taxa. We reveal a long-lasting phase of asymmetrical biotic interchange, with a peak of dispersal from Asia into North America during the late Oligocene warming(26–24 Ma), when dispersal in the opposite direction was greatly decreased. Influx from North America into Asia was lower than in the opposite direction throughout the Cenozoic, but with peak rates of dispersal at the end of the Eocene(40–34 Ma)and again in the early to middle Miocene(16–14 Ma). The strong association between dispersal patterns and environmental changes suggests that plants, fungi and animals have likely dispersed from stable to perturbed environments of North America and Eurasia throughout the Cenozoic.The exchange of biotas between Eurasia and North America across the Bering land bridge had a major impact on ecosystems of both continents throughout the Cenozoic. This exchange has received particular attention regarding placental mammals dispersing into the Americas, including humans after the last glacial period, and also as an explanation for the disjunct distribution of related seed plants in eastern Asia and eastern North America. Here, we investigate bi-directional dispersal across the Bering land bridge from estimates of dispersal events based on time-calibrated phylogenies of a broad range of plant, fungus and animal taxa. We reveal a long-lasting phase of asymmetrical biotic interchange, with a peak of dispersal from Asia into North America during the late Oligocene warming(26–24 Ma), when dispersal in the opposite direction was greatly decreased. Influx from North America into Asia was lower than in the opposite direction throughout the Cenozoic, but with peak rates of dispersal at the end of the Eocene(40–34 Ma)and again in the early to middle Miocene(16–14 Ma). The strong association between dispersal patterns and environmental changes suggests that plants, fungi and animals have likely dispersed from stable to perturbed environments of North America and Eurasia throughout the Cenozoic.

关 键 词：multiple TAXA BIOGEOGRAPHY BERING land bridge CENOZOIC 

分 类 号：N[自然科学总论]