Molecular data suggest long-term in Situ Antarctic persistence within Antarctica's most speciose plant genus, Schistidium
© 2018 Biersma, Jackson, Stech, Griffiths, Linse and Convey. From glacial reconstructions it is clear that Antarctic terrestrial life must have been extremely limited throughout Quaternary glacial periods. In contrast, recent biological studies provide clear evidence for long-term in situ persistenc...
Main Authors: | , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Frontiers Media SA
2018
|
Subjects: | |
Online Access: | https://www.repository.cam.ac.uk/handle/1810/280537 https://doi.org/10.17863/CAM.27906 |
id |
ftunivcam:oai:www.repository.cam.ac.uk:1810/280537 |
---|---|
record_format |
openpolar |
spelling |
ftunivcam:oai:www.repository.cam.ac.uk:1810/280537 2024-01-14T10:01:04+01:00 Molecular data suggest long-term in Situ Antarctic persistence within Antarctica's most speciose plant genus, Schistidium Biersma, EM Jackson, JA Stech, M Griffiths, H Linse, K Convey, P 2018 application/pdf https://www.repository.cam.ac.uk/handle/1810/280537 https://doi.org/10.17863/CAM.27906 eng eng Frontiers Media SA http://dx.doi.org/10.3389/fevo.2018.00077 Frontiers in Ecology and Evolution https://www.repository.cam.ac.uk/handle/1810/280537 doi:10.17863/CAM.27906 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ bryophyte polar biogeography biodiversity survival Antarctic moss bipolar Article 2018 ftunivcam https://doi.org/10.17863/CAM.27906 2023-12-21T23:24:28Z © 2018 Biersma, Jackson, Stech, Griffiths, Linse and Convey. From glacial reconstructions it is clear that Antarctic terrestrial life must have been extremely limited throughout Quaternary glacial periods. In contrast, recent biological studies provide clear evidence for long-term in situ persistence throughout glacial times within most extant Antarctic faunal and several microbial groups. However, even now, the evolutionary history of the Antarctic flora-despite playing major role in Antarctic ecosystems-remains poorly studied. We assessed the diversity, richness and relative age divergences within Schistidium (Grimmiaceae, Bryophyta), the most species-rich plant genus in the Antarctic, as well as the plant genus containing most Antarctic endemic species. We applied phylogenetic and molecular dating methods based on nuclear ribosomal Internal Transcribed Spacer sequences, including all known Antarctic Schistidium species with available sample material. We additionally investigated the continent-wide genetic diversity within the most common Antarctic representative of the genus-the endemic species Schistidium antarctici-and performed preliminary phylogeographic analyses of the bipolar species Schistidium rivulare. Most previously described Antarctic Schistidium species were genetically distinct, confirming their specific status. Interspecific divergences of all species took place at least ~1 Mya, suggesting a likely in situ persistence in Antarctica for (at least) all endemic Schistidium species. The widespread endemic species, Schistidium antarctici, diverged from other Antarctic congeners in the late Miocene, thereby revealing the oldest extant plant species currently known in Antarctica, and providing increasing support for the hypothesis of vegetation survival through multiple glacial periods. Within S. antarctici we identified several distinct clades dividing the eastern Antarctic Peninsula and Scotia Arc islands from the western Antarctic Peninsula and all continental locations. This suggests that the ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Schistidium antarctici Apollo - University of Cambridge Repository Antarctic Antarctic Peninsula The Antarctic |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
bryophyte polar biogeography biodiversity survival Antarctic moss bipolar |
spellingShingle |
bryophyte polar biogeography biodiversity survival Antarctic moss bipolar Biersma, EM Jackson, JA Stech, M Griffiths, H Linse, K Convey, P Molecular data suggest long-term in Situ Antarctic persistence within Antarctica's most speciose plant genus, Schistidium |
topic_facet |
bryophyte polar biogeography biodiversity survival Antarctic moss bipolar |
description |
© 2018 Biersma, Jackson, Stech, Griffiths, Linse and Convey. From glacial reconstructions it is clear that Antarctic terrestrial life must have been extremely limited throughout Quaternary glacial periods. In contrast, recent biological studies provide clear evidence for long-term in situ persistence throughout glacial times within most extant Antarctic faunal and several microbial groups. However, even now, the evolutionary history of the Antarctic flora-despite playing major role in Antarctic ecosystems-remains poorly studied. We assessed the diversity, richness and relative age divergences within Schistidium (Grimmiaceae, Bryophyta), the most species-rich plant genus in the Antarctic, as well as the plant genus containing most Antarctic endemic species. We applied phylogenetic and molecular dating methods based on nuclear ribosomal Internal Transcribed Spacer sequences, including all known Antarctic Schistidium species with available sample material. We additionally investigated the continent-wide genetic diversity within the most common Antarctic representative of the genus-the endemic species Schistidium antarctici-and performed preliminary phylogeographic analyses of the bipolar species Schistidium rivulare. Most previously described Antarctic Schistidium species were genetically distinct, confirming their specific status. Interspecific divergences of all species took place at least ~1 Mya, suggesting a likely in situ persistence in Antarctica for (at least) all endemic Schistidium species. The widespread endemic species, Schistidium antarctici, diverged from other Antarctic congeners in the late Miocene, thereby revealing the oldest extant plant species currently known in Antarctica, and providing increasing support for the hypothesis of vegetation survival through multiple glacial periods. Within S. antarctici we identified several distinct clades dividing the eastern Antarctic Peninsula and Scotia Arc islands from the western Antarctic Peninsula and all continental locations. This suggests that the ... |
format |
Article in Journal/Newspaper |
author |
Biersma, EM Jackson, JA Stech, M Griffiths, H Linse, K Convey, P |
author_facet |
Biersma, EM Jackson, JA Stech, M Griffiths, H Linse, K Convey, P |
author_sort |
Biersma, EM |
title |
Molecular data suggest long-term in Situ Antarctic persistence within Antarctica's most speciose plant genus, Schistidium |
title_short |
Molecular data suggest long-term in Situ Antarctic persistence within Antarctica's most speciose plant genus, Schistidium |
title_full |
Molecular data suggest long-term in Situ Antarctic persistence within Antarctica's most speciose plant genus, Schistidium |
title_fullStr |
Molecular data suggest long-term in Situ Antarctic persistence within Antarctica's most speciose plant genus, Schistidium |
title_full_unstemmed |
Molecular data suggest long-term in Situ Antarctic persistence within Antarctica's most speciose plant genus, Schistidium |
title_sort |
molecular data suggest long-term in situ antarctic persistence within antarctica's most speciose plant genus, schistidium |
publisher |
Frontiers Media SA |
publishDate |
2018 |
url |
https://www.repository.cam.ac.uk/handle/1810/280537 https://doi.org/10.17863/CAM.27906 |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Schistidium antarctici |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Schistidium antarctici |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/280537 doi:10.17863/CAM.27906 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.17863/CAM.27906 |
_version_ |
1788066906401406976 |