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1. Late Quaternary dynamics of Arctic biota from ancient environmental genomics

Author

Wang, Yucheng, Pedersen, Mikkel Winther, Alsos, Inger Greve, De Sanctis, Bianca, Racimo, Fernando, Prohaska, Ana, Coissac, Eric, Owens, Hannah Lois, Merkel, Marie Kristine F��reid, Fernandez-Guerra, Antonio, Rouillard, Alexandra, Lammers, Youri, Alberti, Adriana, Denoeud, France, Money, Daniel, Ruter, Anthony H, McColl, Hugh, Larsen, Nicolaj Krog, Cherezova, Anna A, Edwards, Mary E, Fedorov, Grigory B, Haile, James, Orlando, Ludovic, Vinner, Lasse, Korneliussen, Thorfinn Sand, Beilman, David W, Bj��rk, Anders A, Cao, Jialu, Dockter, Christoph, Esdale, Julie, Gusarova, Galina, Kjeldsen, Kristian K, Mangerud, Jan, Rasic, Jeffrey T, Skadhauge, Birgitte, Svendsen, John Inge, Tikhonov, Alexei, Wincker, Patrick, Xing, Yingchun, Zhang, Yubin, Froese, Duane G, Rahbek, Carsten, Nogues, David Bravo, Holden, Philip B, Edwards, Neil R, Durbin, Richard, Meltzer, David J, Kj��r, Kurt H, M��ller, Per, and Willerslev, Eske

Subjects
631/208/212/2142, 13. Climate action, 631/208/514/2254, 704/158/2165, 38/23, article, 45/22, 14. Life underwater, 15. Life on land, 631/158/2463, 631/158/2462
Abstract

During the last glacial-interglacial cycle, Arctic biotas experienced substantial climatic changes, yet the nature, extent and rate of their responses are not fully understood1-8. Here we report a large-scale environmental DNA metagenomic study of ancient plant and mammal communities, analysing 535 permafrost and lake sediment samples from across the Arctic spanning the past 50,000 years. Furthermore, we present 1,541 contemporary plant genome assemblies that were generated as reference sequences. Our study provides several insights into the long-term dynamics of the Arctic biota at the circumpolar and regional scales. Our key findings include: (1) a relatively homogeneous steppe-tundra flora dominated the Arctic during the Last Glacial Maximum, followed by regional divergence of vegetation during the Holocene epoch; (2) certain grazing animals consistently co-occurred in space and time; (3) humans appear to have been a minor factor in driving animal distributions; (4) higher effective precipitation, as well as an increase in the proportion of wetland plants, show negative effects on animal diversity; (5) the persistence of the steppe-tundra vegetation in northern Siberia enabled the late survival of several now-extinct megafauna species, including the woolly mammoth until 3.9 �� 0.2 thousand years ago (ka) and the woolly rhinoceros until 9.8 �� 0.2 ka; and (6) phylogenetic analysis of mammoth environmental DNA reveals a previously unsampled mitochondrial lineage. Our findings highlight the power of ancient environmental metagenomics analyses to advance understanding of population histories and long-term ecological dynamics.

2. Genomic evidence for the Pleistocene and recent population history of Native Americans

Author

Raghavan, M., Steinrücken, M, Harris, M, Schiffels, Stephan, DeGiorgio, Michael, Albrechtsen, M, Valdiosera, M, Ávila-Arcos, M, Malaspinas, M, Eriksson, Anders, Moltke, M, Homburger, M, Wall, Jeff, Cornejo, Omar, Moreno-Mayar, M, Korneliussen, M, Pierre, M, Rasmussen, Rasmus, Campos, Paul, de Barros Damgaard, Peter, Allentoft, M., Lindo, John, Metspalu, M., Rodríguez-Varela, Carlos, Mansilla, M, Henrickson, Celeste, Seguin-Orlando, M, Malmström, M, Stafford, M, Shringarpure, M, Moreno-Estrada, M, Karmin, M., Tambets, Kristiina, Bergström, Anders, Xue, Yali, Vera, Vera, Friend, Andrew, Singarayer, M, Valdes, Paul, Balloux, François, Leboreiro, M, Vera, M, Rangel-Villalobos, M, Pettener, David, Luiselli, Donata, Davis, Loren, Heyer, M, Zollikofer, Chris, Ponce de León, M, Smith, M, Grimes, John, Pike, John, Deal, John, Fuller, M, Arriaza, Bernardo, Standen, Vivien, Luz, M., Ricaut, M, Guidon, M, Osipova, Ludmila, Voevoda, M., Posukh, Olga, Balanovsky, M, Lavryashina, M., Bogunov, M, Khusnutdinova, M, Gubina, M., Balanovska, M, Fedorova, M, Litvinov, Sergey, Malyarchuk, M, Derenko, M., Mosher, M., Archer, David, Cybulski, Jerome, Petzelt, Barbara, Mitchell, Joycelynn, Worl, Rosita, Norman, Paul, Parham, Peter, Kemp, Brian, Kivisild, Toomas, Smith, Chris, Sandhu, Manjinder, Crawford, Michael, Villems, Richard, Smith, David, Waters, Michael, Goebel, Ted, Johnson, John, Malhi, Ripan, Jakobsson, Mattias, Meltzer, David, Manica, Andrea, Durbin, Richard, Bustamante, Carlos, Song, Yun, Nielsen, Rasmus, Willerslev, Eske, Steinrucken, M., Harris, K., Rasmussen, S., Albrechtsen, A., Valdiosera, C., Avila-Arcos, M., Malaspinas, S., Moltke, I., Homburger, J., Moreno-Mayar, J., Korneliussen, S., Pierre, T., Rasmussen, M., Damgaard, P., Metspalu, E., Rodriguez-Varela, R., Mansilla, J., Seguin-Orlando, A., Malmstrom, H., Stafford, T., Shringarpure, S., Moreno-Estrada, A., Bergstrom, A., Warmuth, V., Singarayer, J., Leboreiro, I., Vera, J., Rangel-Villalobos, H., Heyer, E., Ponce De Leon, M., Grimes, V., Pike, K., Deal, M., Fuller, T., Ricaut, F., Guidon, N., Balanovsky, O., Bogunov, Y., Khusnutdinova, E., Balanovska, E., Fedorova, S., Malyarchuk, B., Norman, J., Kemp, M., Malhi, S., Meltzer, J., Song, S., Swedish Institute of Space Physics [Uppsala] (IRF), Institut de Recherche sur le Cancer et le Vieillissement (IRCAN), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Human Evolution, The Wellcome Trust Sanger Institute [Cambridge], Centre National de la Recherche Scientifique (CNRS), School of Geographical Sciences [Bristol], University of Bristol [Bristol], University of Edinburgh, University of Bologna, Universidad de Tarapaca, Institute of Cytology and Genetics, Russian Academy of Sciences [Moscow] (RAS), School of Health Science, Higher Education Centre Novo mesto, Departments of Chemistry and of Structural Biology, Stanford University, Department of Anthropology, Washington State University (WSU), Leverhulme Centre for Human Evolutionary Studies University of Cambridge, University of Cambridge [UK] (CAM), Centre for Cybercrime and Computer Security [Newcastle], School of Computing Science [Newcastle], Newcastle University [Newcastle]-Newcastle University [Newcastle], Strangeways Research Laboratory, MRC, UMR 6578 : Anthropologie Bio-Culturelle (UAABC), Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS), Harvard Medical School [Boston] (HMS), Evolutionary Biology, Uppsala University, Department of Biological Statistics and Computational Biology, Cornell University [New York], Dept Integrat Biol, Section for GeoGenetics, Globe Institute, Faculty of Health and Medical Sciences, University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU)-Faculty of Health and Medical Sciences, University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU), Eco-Anthropologie et Ethnobiologie (EAE), Muséum national d'Histoire naturelle (MNHN)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Department of Nuclear Medicine, Austin Health-Centre for Positron Emission Tomography (PET)-Austin Hospital [Melbourne], Austin Health, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Fundaçao Museu do Homem Americano (FUMDHAM), Department of Mechanical Engineering, Sogang University, parent, Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA), Stanford University [Stanford], UMR 6578 : Adaptabilité Biologique et Culturelle (UAABC), Cornell University, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Raghavan, Maanasa, Steinrücken, Matthia, Harris, Kelley, Schiffels, Stephan, Rasmussen, Simon, Degiorgio, Michael, Albrechtsen, Ander, Valdiosera, Cristina, Ávila-Arcos, María C., Malaspinas, Anna-Sapfo, Eriksson, Ander, Moltke, Ida, Metspalu, Mait, Homburger, Julian R., Wall, Jeff, Cornejo, Omar E., Moreno-Mayar, J. Víctor, Korneliussen, Thorfinn S., Pierre, Tracey, Rasmussen, Morten, Campos, Paula F., De Barros Damgaard, Peter, Allentoft, Morten E., Lindo, John, Metspalu, Ene, Rodríguez-Varela, Ricardo, Mansilla, Josefina, Henrickson, Celeste, Seguin-Orlando, Andaine, Malmstöm, Helena, Stafford, Thoma, Shringarpure, Suyash S., Moreno-Estrada, André, Karmin, Monika, Tambets, Kristiina, Bergström, Ander, Xue, Yali, Warmuth, Vera, Friend, Andrew D., Singarayer, Joy, Valdes, Paul, Balloux, Francoi, Leboreiro, Ilán, Vera, Jose Lui, Rangel-Villalobos, Hector, Pettener, Davide, Luiselli, Donata, Davis, Loren G., Heyer, Evelyne, Zollikofer, Christoph P. E., Ponce De León, Marcia S., Smith, Colin I., Grimes, Vaughan, Pike, Kelly-Anne, Deal, Michael, Fuller, Benjamin T., Arriaza, Bernardo, Standen, Vivien, Luz, Maria F., Ricaut, Francoi, Guidon, Niede, Osipova, Ludmila, Voevoda, Mikhail I., Posukh, Olga L., Balanovsky, Oleg, Lavryashina, Maria, Bogunov, Yuri, Khusnutdinova, Elza, Gubina, Marina, Balanovska, Elena, Fedorova, Sardana, Litvinov, Sergey, Malyarchuk, Bori, Derenko, Miroslava, Mosher, M.J., Archer, David, Cybulski, Jerome, Petzelt, Barbara, Mitchell, Joycelynn, Worl, Rosita, Norman, Paul J., Parham, Peter, Kemp, Brian M., Kivisild, Tooma, Tyler-Smith, Chri, Sandhu, Manjinder S., Crawford, Michael, Villems, Richard, Smith, David Glenn, Waters, Michael R., Goebel, Ted, Johnson, John R., Malhi, Ripan S., Jakobsson, Mattia, Meltzer, David J., Manica, Andrea, Durbin, Richard, Bustamante, Carlos D., Song, Yun S., Nielsen, Rasmu, Willerslev, Eske, Université Nice Sophia Antipolis (1965 - 2019) (UNS), University of Bologna/Università di Bologna, University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH)-Faculty of Health and Medical Sciences, and University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH)

Subjects
ARCHAEOLOGICAL SEQUENCE, Gene Flow, Pleistocene, CRANIAL MORPHOLOGY, CLOVIS, MIGRATION, Human Migration, Population, [SHS.ANTHRO-BIO]Humanities and Social Sciences/Biological anthropology, Population genetics, NEW-WORLD, America, Biology, Beringia, Gene flow, SOUTH-AMERICA, 03 medical and health sciences, 0601 history and archaeology, education, History, Ancient, 030304 developmental biology, 0303 health sciences, education.field_of_study, CONDITIONAL SAMPLING DISTRIBUTION, Multidisciplinary, 060102 archaeology, Models, Genetic, Human migration, business.industry, Medicine (all), 06 humanities and the arts, BRAZIL, MODEL, Siberia, South american, ORIGINS, Genomic, Indians, North American, Ethnology, Athabascans, business, Human
Abstract

How and when the Americas were populated remains contentious. Using ancient and modern genome wide data we found that the ancestors of all present day Native Americans including Athabascans and Amerindians entered the Americas as a single migration wave from Siberia no earlier than 23 thousand years ago (ka) and after no more than an 8000 year isolation period in Beringia. After their arrival to the Americas ancestral Native Americans diversified into two basal genetic branches around 13 ka one that is now dispersed across North and South America and the other restricted to North America. Subsequent gene flow resulted in some Native Americans sharing ancestry with present day East Asians (including Siberians) and more distantly Australo Melanesians. Putative “Paleoamerican” relict populations including the historical Mexican Pericúes and South American Fuego Patagonians are not directly related to modern Australo Melanesians as suggested by the Paleoamerican Model. INTRODUCTION The consensus view on the peopling of the Americas is that ancestors of modern Native Americans entered the Americas from Siberia via the Bering Land Bridge and that this occurred at least {\textasciitilde}14.6 thousand years ago (ka). However the number and timing of migrations into the Americas remain controversial with conflicting interpretations based on anatomical and genetic evidence. RATIONALE In this study we address four major unresolved issues regarding the Pleistocene and recent population history of Native Americans: (i) the timing of their divergence from their ancestral group (ii) the number of migrations into the Americas (iii) whether there was {\textasciitilde}15000 years of isolation of ancestral Native Americans in Beringia (Beringian Incubation Model) and (iv) whether there was post Pleistocene survival of relict populations in the Americas related to Australo Melanesians as suggested by apparent differences in cranial morphologies between some early (“Paleoamerican”) remains and those of more recent Native Americans. We generated 31 high coverage modern genomes from the Americas Siberia and Oceania; 23 ancient genomic sequences from the Americas dating between {\textasciitilde}0.2 and 6 ka; and SNP chip genotype data from 79 present day individuals belonging to 28 populations from the Americas and Siberia. The above data sets were analyzed together with published modern and ancient genomic data from worldwide populations after masking some present day Native Americans for recent European admixture. RESULTS Using three different methods we determined the divergence time for all Native Americans (Athabascans and Amerindians) from their Siberian ancestors to be {\textasciitilde}20 ka and no earlier than {\textasciitilde}23 ka. Furthermore we dated the divergence between Athabascans (northern Native American branch together with northern North American Amerindians) and southern North Americans and South and Central Americans (southern Native American branch) to be {\textasciitilde}13 ka. Similar divergence times from East Asian populations and a divergence time between the two branches that is close in age to the earliest well established archaeological sites in the Americas suggest that the split between the branches occurred within the Americas. We additionally found that several sequenced Holocene individuals from the Americas are related to present day populations from the same geographical regions implying genetic continuity of ancient and modern populations in some parts of the Americas over at least the past 8500 years. Moreover our results suggest that there has been gene flow between some Native Americans from both North and South America and groups related to East Asians and Australo Melanesians the latter possibly through an East Asian route that might have included ancestors of modern Aleutian Islanders. Last using both genomic and morphometric analyses we found that historical Native American groups such as the Pericúes and Fuego Patagonians were not “relicts” of Paleoamericans and hence our results do not support an early migration of populations directly related to Australo Melanesians into the Americas. CONCLUSION Our results provide an upper bound of {\textasciitilde}23 ka on the initial divergence of ancestral Native Americans from their East Asian ancestors followed by a short isolation period of no more than {\textasciitilde}8000 years and subsequent entrance and spread across the Americas. The data presented are consistent with a single migration model for all Native Americans with later gene flow from sources related to East Asians and indirectly Australo Melanesians. The single wave diversified {\textasciitilde}13 ka likely within the Americas giving rise to the northern and southern branches of present day Native Americans. View larger version: In this page In a new window Download PowerPoint Slide for Teaching Population history of present day Native Americans.The ancestors of all Native Americans entered the Americas as a single migration wave from Siberia (purple) no earlier than {\textasciitilde}23 ka separate from the Inuit (green) and diversified into “northern” and “southern” Native American branches {\textasciitilde}13 ka. There is evidence of post divergence gene flow between some Native Americans and groups related to East Asians/Inuit and Australo Melanesians (yellow). Genetic history of Native Americans Several theories have been put forth as to the origin and timing of when Native American ancestors entered the Americas. To clarify this controversy Raghavan et al. examined the genomic variation among ancient and modern individuals from Asia and the Americas. There is no evidence for multiple waves of entry or recurrent gene flow with Asians in northern populations. The earliest migrations occurred no earlier than 23000 years ago from Siberian ancestors. Amerindians and Athabascans originated from a single population splitting approximately 13000 years ago. Science this issue 10.1126/science.aab3884

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