American mastodon mitochondrial genomes suggest multiple dispersal events in response to Pleistocene climate oscillations
| Autor: | Daniel C. Fisher, Chris Widga, Blaine W. Schubert, Melanie Kuch, Emil Karpinski, William F. Simpson, Jennifer Klunk, Grant D. Zazula, Simon Y. W. Ho, G. Brian Golding, Dirk Hackenberger, Hendrik N. Poinar, Ross D. E. MacPhee, Ana T. Duggan, John W. Hoganson, Patrick S. Druckenmiller, Joaquín Arroyo-Cabrales, Pam Groves, Christopher N. Jass |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Male
0301 basic medicine Pleistocene Genetic Speciation Climate Change Science Population General Physics and Astronomy Climate change 02 engineering and technology Biology DNA Mitochondrial Article General Biochemistry Genetics and Molecular Biology Beringia 03 medical and health sciences Animals Genetic variation Glacial period DNA Ancient education lcsh:Science education.field_of_study Multidisciplinary Fossils Ecology Palaeontology Mastodons Climate-change ecology fungi Palaeoecology General Chemistry social sciences 021001 nanoscience & nanotechnology humanities Phylogeography 030104 developmental biology Genome Mitochondrial Paleoecology Biological dispersal Female lcsh:Q 0210 nano-technology geographic locations |
| Zdroj: | Nature Communications, Vol 11, Iss 1, Pp 1-9 (2020) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Pleistocene glacial-interglacial cycles are correlated with dramatic temperature oscillations. Examining how species responded to these natural fluctuations can provide valuable insights into the impacts of present-day anthropogenic climate change. Here we present a phylogeographic study of the extinct American mastodon (Mammut americanum), based on 35 complete mitochondrial genomes. These data reveal the presence of multiple lineages within this species, including two distinct clades from eastern Beringia. Our molecular date estimates suggest that these clades arose at different times, supporting a pattern of repeated northern expansion and local extirpation in response to glacial cycling. Consistent with this hypothesis, we also note lower levels of genetic diversity among northern mastodons than in endemic clades south of the continental ice sheets. The results of our study highlight the complex relationships between population dispersals and climate change, and can provide testable hypotheses for extant species expected to experience substantial biogeographic impacts from rising temperatures. Pleistocene population dynamics can inform the consequences of current climate change. This phylogeography of 35 complete American mastodon mitochondrial genomes suggests distinct lineages in this species repeatedly expanded northwards and then went locally extinct in response to glacial cycles. |
| Databáze: | OpenAIRE |
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