Hidden levels of phylodiversity in Antarctic green algae: further evidence for the existence of glacial refugia
Recent data revealed that metazoans such as mites and springtails have persisted in Antarctica throughout several glacial-interglacial cycles, which contradicts the existing paradigm that terrestrial life was wiped out by successive glacial events and that the current inhabitants are recent colonize...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
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ftunivgent:oai:archive.ugent.be:767281 2023-06-11T04:06:18+02:00 Hidden levels of phylodiversity in Antarctic green algae: further evidence for the existence of glacial refugia De Wever, Aaike Leliaert, Frédérik Verleyen, Elie Vanormelingen, Pieter Van Der Gucht, Katleen Hodgson, Dominic A Sabbe, Koen Vyverman, Wim 2009 application/pdf https://biblio.ugent.be/publication/767281 http://hdl.handle.net/1854/LU-767281 https://doi.org/10.1098/rspb.2009.0994 https://biblio.ugent.be/publication/767281/file/767282 eng eng https://biblio.ugent.be/publication/767281 http://hdl.handle.net/1854/LU-767281 http://dx.doi.org/10.1098/rspb.2009.0994 https://biblio.ugent.be/publication/767281/file/767282 No license (in copyright) info:eu-repo/semantics/restrictedAccess PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES ISSN: 0962-8452 Biology and Life Sciences MICROBIAL MATS ABSOLUTE RATES DIVERGENCE TIMES EUKARYOTE EVOLUTION FRESH-WATER LARSEMANN HILLS MOLECULAR CLOCK EAST ANTARCTICA MCMURDO DRY VALLEYS SOUTHERN VICTORIA LAND molecular phylogeny green algae glacial refugia endemism Antarctica biogeography journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2009 ftunivgent https://doi.org/10.1098/rspb.2009.0994 2023-05-10T22:41:14Z Recent data revealed that metazoans such as mites and springtails have persisted in Antarctica throughout several glacial-interglacial cycles, which contradicts the existing paradigm that terrestrial life was wiped out by successive glacial events and that the current inhabitants are recent colonizers. We used molecular phylogenetic techniques to study Antarctic microchlorophyte strains isolated from lacustrine habitats from maritime and continental Antarctica. The 14 distinct chlorophycean and trebouxiophycean lineages observed point to a wide phylogenetic diversity of apparently endemic Antarctic lineages at different taxonomic levels. This supports the hypothesis that long-term survival took place in glacial refugia, resulting in a specific Antarctic flora. The majority of the lineages have estimated ages between 17 and 84 Ma and probably diverged from their closest relatives around the time of the opening of Drake Passage (30-45 Ma), while some lineages with longer branch lengths have estimated ages that precede the break-up of Gondwana. The variation in branch length and estimated age points to several independent but rare colonization events Article in Journal/Newspaper Antarc* Antarctic Antarctica Drake Passage East Antarctica McMurdo Dry Valleys Victoria Land Ghent University Academic Bibliography Antarctic East Antarctica Victoria Land Drake Passage McMurdo Dry Valleys Larsemann Hills ENVELOPE(76.217,76.217,-69.400,-69.400) Proceedings of the Royal Society B: Biological Sciences 276 1673 3591 3599 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Biology and Life Sciences MICROBIAL MATS ABSOLUTE RATES DIVERGENCE TIMES EUKARYOTE EVOLUTION FRESH-WATER LARSEMANN HILLS MOLECULAR CLOCK EAST ANTARCTICA MCMURDO DRY VALLEYS SOUTHERN VICTORIA LAND molecular phylogeny green algae glacial refugia endemism Antarctica biogeography |
spellingShingle |
Biology and Life Sciences MICROBIAL MATS ABSOLUTE RATES DIVERGENCE TIMES EUKARYOTE EVOLUTION FRESH-WATER LARSEMANN HILLS MOLECULAR CLOCK EAST ANTARCTICA MCMURDO DRY VALLEYS SOUTHERN VICTORIA LAND molecular phylogeny green algae glacial refugia endemism Antarctica biogeography De Wever, Aaike Leliaert, Frédérik Verleyen, Elie Vanormelingen, Pieter Van Der Gucht, Katleen Hodgson, Dominic A Sabbe, Koen Vyverman, Wim Hidden levels of phylodiversity in Antarctic green algae: further evidence for the existence of glacial refugia |
topic_facet |
Biology and Life Sciences MICROBIAL MATS ABSOLUTE RATES DIVERGENCE TIMES EUKARYOTE EVOLUTION FRESH-WATER LARSEMANN HILLS MOLECULAR CLOCK EAST ANTARCTICA MCMURDO DRY VALLEYS SOUTHERN VICTORIA LAND molecular phylogeny green algae glacial refugia endemism Antarctica biogeography |
description |
Recent data revealed that metazoans such as mites and springtails have persisted in Antarctica throughout several glacial-interglacial cycles, which contradicts the existing paradigm that terrestrial life was wiped out by successive glacial events and that the current inhabitants are recent colonizers. We used molecular phylogenetic techniques to study Antarctic microchlorophyte strains isolated from lacustrine habitats from maritime and continental Antarctica. The 14 distinct chlorophycean and trebouxiophycean lineages observed point to a wide phylogenetic diversity of apparently endemic Antarctic lineages at different taxonomic levels. This supports the hypothesis that long-term survival took place in glacial refugia, resulting in a specific Antarctic flora. The majority of the lineages have estimated ages between 17 and 84 Ma and probably diverged from their closest relatives around the time of the opening of Drake Passage (30-45 Ma), while some lineages with longer branch lengths have estimated ages that precede the break-up of Gondwana. The variation in branch length and estimated age points to several independent but rare colonization events |
format |
Article in Journal/Newspaper |
author |
De Wever, Aaike Leliaert, Frédérik Verleyen, Elie Vanormelingen, Pieter Van Der Gucht, Katleen Hodgson, Dominic A Sabbe, Koen Vyverman, Wim |
author_facet |
De Wever, Aaike Leliaert, Frédérik Verleyen, Elie Vanormelingen, Pieter Van Der Gucht, Katleen Hodgson, Dominic A Sabbe, Koen Vyverman, Wim |
author_sort |
De Wever, Aaike |
title |
Hidden levels of phylodiversity in Antarctic green algae: further evidence for the existence of glacial refugia |
title_short |
Hidden levels of phylodiversity in Antarctic green algae: further evidence for the existence of glacial refugia |
title_full |
Hidden levels of phylodiversity in Antarctic green algae: further evidence for the existence of glacial refugia |
title_fullStr |
Hidden levels of phylodiversity in Antarctic green algae: further evidence for the existence of glacial refugia |
title_full_unstemmed |
Hidden levels of phylodiversity in Antarctic green algae: further evidence for the existence of glacial refugia |
title_sort |
hidden levels of phylodiversity in antarctic green algae: further evidence for the existence of glacial refugia |
publishDate |
2009 |
url |
https://biblio.ugent.be/publication/767281 http://hdl.handle.net/1854/LU-767281 https://doi.org/10.1098/rspb.2009.0994 https://biblio.ugent.be/publication/767281/file/767282 |
long_lat |
ENVELOPE(76.217,76.217,-69.400,-69.400) |
geographic |
Antarctic East Antarctica Victoria Land Drake Passage McMurdo Dry Valleys Larsemann Hills |
geographic_facet |
Antarctic East Antarctica Victoria Land Drake Passage McMurdo Dry Valleys Larsemann Hills |
genre |
Antarc* Antarctic Antarctica Drake Passage East Antarctica McMurdo Dry Valleys Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Drake Passage East Antarctica McMurdo Dry Valleys Victoria Land |
op_source |
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES ISSN: 0962-8452 |
op_relation |
https://biblio.ugent.be/publication/767281 http://hdl.handle.net/1854/LU-767281 http://dx.doi.org/10.1098/rspb.2009.0994 https://biblio.ugent.be/publication/767281/file/767282 |
op_rights |
No license (in copyright) info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1098/rspb.2009.0994 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
276 |
container_issue |
1673 |
container_start_page |
3591 |
op_container_end_page |
3599 |
_version_ |
1768378177609007104 |