Multiple late-pleistocene colonisation events of the Antarctic pearlwort Colobanthus quitensis (Caryophyllaceae) reveal the recent arrival of native Antarctic vascular flora
Aim Antarctica's remote and extreme terrestrial environments are inhabited by only two species of native vascular plants. We assessed genetic connectivity amongst Antarctic and South American populations of one of these species, Colobanthus quitensis, to determine its origin and age in Antarcti...
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Online Access: | https://doi.org/10.1111/jbi.13843 https://repositorio.uchile.cl/handle/2250/175082 |
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ftunivchile:oai:repositorio.uchile.cl:2250/175082 2023-05-15T13:34:34+02:00 Multiple late-pleistocene colonisation events of the Antarctic pearlwort Colobanthus quitensis (Caryophyllaceae) reveal the recent arrival of native Antarctic vascular flora Biersma, Elisabeth Torres Díaz, Cristian Molina Montenegro, Marco Newsham, Kevin Vidal, Marcela Collado, Gonzalo Acuña Rodríguez, Ian Ballesteros, Gabriel Figueroa, Christian Goodall Copestake, William Leppe, Marcelo Cuba Díaz, Marely Valladares Cortés, Moises Pertierra, Luis Convey, Peter 2020 application/pdf https://doi.org/10.1111/jbi.13843 https://repositorio.uchile.cl/handle/2250/175082 en eng Wiley Journal of Biogeography 2020;00:1–11 doi:10.1111/jbi.13843 https://repositorio.uchile.cl/handle/2250/175082 Attribution-NonCommercial-NoDerivs 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ CC-BY-NC-ND Journal of Biogeography Angiosperm Antarctica Biogeography Dispersal Island Pearlwort South America Southern Ocean Artículo de revista 2020 ftunivchile https://doi.org/10.1111/jbi.13843 2022-12-25T00:51:09Z Aim Antarctica's remote and extreme terrestrial environments are inhabited by only two species of native vascular plants. We assessed genetic connectivity amongst Antarctic and South American populations of one of these species, Colobanthus quitensis, to determine its origin and age in Antarctica. Location Maritime Antarctic, sub-Antarctic islands, South America. Taxon Antarctic pearlwort Colobanthus quitensis (Caryophyllaceae). Methods Four chloroplast markers and one nuclear marker were sequenced from 270 samples from a latitudinal transect spanning 21-68 degrees S. Phylogeographic, population genetic and molecular dating analyses were used to assess the demographic history of C. quitensis and the age of the species in Antarctica. Results Maritime Antarctic populations consisted of two different haplotype clusters, occupying the northern and southern Maritime Antarctic. Molecular dating analyses suggested C. quitensis to be a young (<1 Ma) species, with contemporary population structure derived since the late-Pleistocene. Main conclusions The Maritime Antarctic populations likely derived from two independent, late-Pleistocene dispersal events. Both clusters shared haplotypes with sub-Antarctic South Georgia, suggesting higher connectivity across the Southern Ocean than previously thought. The overall findings of multiple colonization events by a vascular plant species to Antarctica, and the recent timing of these events, are of significance with respect to future colonizations of the Antarctic Peninsula by vascular plants, particularly with predicted increases in ice-free land in this area. This study fills a significant gap in our knowledge of the age of the contemporary Antarctic terrestrial biota. Adding to previous inferences on the other Antarctic vascular plant species (the grass Deschampsia antarctica), we suggest that both angiosperm species are likely to have arrived on a recent (late-Pleistocene) time-scale. While most major groups of Antarctic terrestrial biota include examples of much ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean Universidad de Chile: Repositorio académico Antarctic Antarctic Peninsula Southern Ocean The Antarctic Journal of Biogeography 47 8 1663 1673 |
institution |
Open Polar |
collection |
Universidad de Chile: Repositorio académico |
op_collection_id |
ftunivchile |
language |
English |
topic |
Angiosperm Antarctica Biogeography Dispersal Island Pearlwort South America Southern Ocean |
spellingShingle |
Angiosperm Antarctica Biogeography Dispersal Island Pearlwort South America Southern Ocean Biersma, Elisabeth Torres Díaz, Cristian Molina Montenegro, Marco Newsham, Kevin Vidal, Marcela Collado, Gonzalo Acuña Rodríguez, Ian Ballesteros, Gabriel Figueroa, Christian Goodall Copestake, William Leppe, Marcelo Cuba Díaz, Marely Valladares Cortés, Moises Pertierra, Luis Convey, Peter Multiple late-pleistocene colonisation events of the Antarctic pearlwort Colobanthus quitensis (Caryophyllaceae) reveal the recent arrival of native Antarctic vascular flora |
topic_facet |
Angiosperm Antarctica Biogeography Dispersal Island Pearlwort South America Southern Ocean |
description |
Aim Antarctica's remote and extreme terrestrial environments are inhabited by only two species of native vascular plants. We assessed genetic connectivity amongst Antarctic and South American populations of one of these species, Colobanthus quitensis, to determine its origin and age in Antarctica. Location Maritime Antarctic, sub-Antarctic islands, South America. Taxon Antarctic pearlwort Colobanthus quitensis (Caryophyllaceae). Methods Four chloroplast markers and one nuclear marker were sequenced from 270 samples from a latitudinal transect spanning 21-68 degrees S. Phylogeographic, population genetic and molecular dating analyses were used to assess the demographic history of C. quitensis and the age of the species in Antarctica. Results Maritime Antarctic populations consisted of two different haplotype clusters, occupying the northern and southern Maritime Antarctic. Molecular dating analyses suggested C. quitensis to be a young (<1 Ma) species, with contemporary population structure derived since the late-Pleistocene. Main conclusions The Maritime Antarctic populations likely derived from two independent, late-Pleistocene dispersal events. Both clusters shared haplotypes with sub-Antarctic South Georgia, suggesting higher connectivity across the Southern Ocean than previously thought. The overall findings of multiple colonization events by a vascular plant species to Antarctica, and the recent timing of these events, are of significance with respect to future colonizations of the Antarctic Peninsula by vascular plants, particularly with predicted increases in ice-free land in this area. This study fills a significant gap in our knowledge of the age of the contemporary Antarctic terrestrial biota. Adding to previous inferences on the other Antarctic vascular plant species (the grass Deschampsia antarctica), we suggest that both angiosperm species are likely to have arrived on a recent (late-Pleistocene) time-scale. While most major groups of Antarctic terrestrial biota include examples of much ... |
format |
Article in Journal/Newspaper |
author |
Biersma, Elisabeth Torres Díaz, Cristian Molina Montenegro, Marco Newsham, Kevin Vidal, Marcela Collado, Gonzalo Acuña Rodríguez, Ian Ballesteros, Gabriel Figueroa, Christian Goodall Copestake, William Leppe, Marcelo Cuba Díaz, Marely Valladares Cortés, Moises Pertierra, Luis Convey, Peter |
author_facet |
Biersma, Elisabeth Torres Díaz, Cristian Molina Montenegro, Marco Newsham, Kevin Vidal, Marcela Collado, Gonzalo Acuña Rodríguez, Ian Ballesteros, Gabriel Figueroa, Christian Goodall Copestake, William Leppe, Marcelo Cuba Díaz, Marely Valladares Cortés, Moises Pertierra, Luis Convey, Peter |
author_sort |
Biersma, Elisabeth |
title |
Multiple late-pleistocene colonisation events of the Antarctic pearlwort Colobanthus quitensis (Caryophyllaceae) reveal the recent arrival of native Antarctic vascular flora |
title_short |
Multiple late-pleistocene colonisation events of the Antarctic pearlwort Colobanthus quitensis (Caryophyllaceae) reveal the recent arrival of native Antarctic vascular flora |
title_full |
Multiple late-pleistocene colonisation events of the Antarctic pearlwort Colobanthus quitensis (Caryophyllaceae) reveal the recent arrival of native Antarctic vascular flora |
title_fullStr |
Multiple late-pleistocene colonisation events of the Antarctic pearlwort Colobanthus quitensis (Caryophyllaceae) reveal the recent arrival of native Antarctic vascular flora |
title_full_unstemmed |
Multiple late-pleistocene colonisation events of the Antarctic pearlwort Colobanthus quitensis (Caryophyllaceae) reveal the recent arrival of native Antarctic vascular flora |
title_sort |
multiple late-pleistocene colonisation events of the antarctic pearlwort colobanthus quitensis (caryophyllaceae) reveal the recent arrival of native antarctic vascular flora |
publisher |
Wiley |
publishDate |
2020 |
url |
https://doi.org/10.1111/jbi.13843 https://repositorio.uchile.cl/handle/2250/175082 |
geographic |
Antarctic Antarctic Peninsula Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean |
op_source |
Journal of Biogeography |
op_relation |
Journal of Biogeography 2020;00:1–11 doi:10.1111/jbi.13843 https://repositorio.uchile.cl/handle/2250/175082 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1111/jbi.13843 |
container_title |
Journal of Biogeography |
container_volume |
47 |
container_issue |
8 |
container_start_page |
1663 |
op_container_end_page |
1673 |
_version_ |
1766054393740787712 |