Genetic diversity of soil invertebrates corroborates timing estimates for past collapses of the West Antarctic Ice Sheet
During austral summer field seasons between 1999 and 2018, we sampled at 91 locations throughout southern Victoria Land and along the Transantarctic Mountains for six species of endemic microarthropods (Collembola), covering a latitudinal range from 76.0°S to 87.3°S. We assembled individual mitochon...
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ftnerc:oai:nora.nerc.ac.uk:527405 2023-05-15T13:41:45+02:00 Genetic diversity of soil invertebrates corroborates timing estimates for past collapses of the West Antarctic Ice Sheet Collins, Gemma E. Hogg, Ian D. Convey, Peter Sancho, Leopoldo G. Cowan, Don A. Lyons, W. Berry Adams, Byron J. Wall, Diana H. Green, T.G. Allan 2020-08-24 text http://nora.nerc.ac.uk/id/eprint/527405/ https://nora.nerc.ac.uk/id/eprint/527405/1/2007925117.full.pdf https://www.pnas.org/content/early/2020/08/19/2007925117 en eng National Academy of Sciences https://nora.nerc.ac.uk/id/eprint/527405/1/2007925117.full.pdf Collins, Gemma E.; Hogg, Ian D.; Convey, Peter orcid:0000-0001-8497-9903 Sancho, Leopoldo G.; Cowan, Don A.; Lyons, W. Berry; Adams, Byron J.; Wall, Diana H.; Green, T.G. Allan. 2020 Genetic diversity of soil invertebrates corroborates timing estimates for past collapses of the West Antarctic Ice Sheet. Proceedings of the National Academy of Sciences, 117 (36). 22293-22302. https://doi.org/10.1073/pnas.2007925117 <https://doi.org/10.1073/pnas.2007925117> cc_by_nc_nd_4 CC-BY-NC-ND Publication - Article PeerReviewed 2020 ftnerc https://doi.org/10.1073/pnas.2007925117 2023-02-04T19:50:31Z During austral summer field seasons between 1999 and 2018, we sampled at 91 locations throughout southern Victoria Land and along the Transantarctic Mountains for six species of endemic microarthropods (Collembola), covering a latitudinal range from 76.0°S to 87.3°S. We assembled individual mitochondrial cytochrome c oxidase subunit 1 (COI) sequences (n = 866) and found high levels of sequence divergence at both small (<10 km) and large (>600 km) spatial scales for four of the six Collembola species. We applied molecular clock estimates and assessed genetic divergences relative to the timing of past glacial cycles, including collapses of the West Antarctic Ice Sheet (WAIS). We found that genetically distinct lineages within three species have likely been isolated for at least 5.54 My to 3.52 My, while the other three species diverged more recently (<2 My). We suggest that Collembola had greater dispersal opportunities under past warmer climates, via flotation along coastal margins. Similarly increased opportunities for dispersal may occur under contemporary climate warming scenarios, which could influence the genetic structure of extant populations. As Collembola are a living record of past landscape evolution within Antarctica, these findings provide biological evidence to support geological and glaciological estimates of historical WAIS dynamics over the last ca. 5 My. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Victoria Land Natural Environment Research Council: NERC Open Research Archive Antarctic Austral Victoria Land West Antarctic Ice Sheet Transantarctic Mountains Proceedings of the National Academy of Sciences 117 36 22293 22302 |
institution |
Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
During austral summer field seasons between 1999 and 2018, we sampled at 91 locations throughout southern Victoria Land and along the Transantarctic Mountains for six species of endemic microarthropods (Collembola), covering a latitudinal range from 76.0°S to 87.3°S. We assembled individual mitochondrial cytochrome c oxidase subunit 1 (COI) sequences (n = 866) and found high levels of sequence divergence at both small (<10 km) and large (>600 km) spatial scales for four of the six Collembola species. We applied molecular clock estimates and assessed genetic divergences relative to the timing of past glacial cycles, including collapses of the West Antarctic Ice Sheet (WAIS). We found that genetically distinct lineages within three species have likely been isolated for at least 5.54 My to 3.52 My, while the other three species diverged more recently (<2 My). We suggest that Collembola had greater dispersal opportunities under past warmer climates, via flotation along coastal margins. Similarly increased opportunities for dispersal may occur under contemporary climate warming scenarios, which could influence the genetic structure of extant populations. As Collembola are a living record of past landscape evolution within Antarctica, these findings provide biological evidence to support geological and glaciological estimates of historical WAIS dynamics over the last ca. 5 My. |
format |
Article in Journal/Newspaper |
author |
Collins, Gemma E. Hogg, Ian D. Convey, Peter Sancho, Leopoldo G. Cowan, Don A. Lyons, W. Berry Adams, Byron J. Wall, Diana H. Green, T.G. Allan |
spellingShingle |
Collins, Gemma E. Hogg, Ian D. Convey, Peter Sancho, Leopoldo G. Cowan, Don A. Lyons, W. Berry Adams, Byron J. Wall, Diana H. Green, T.G. Allan Genetic diversity of soil invertebrates corroborates timing estimates for past collapses of the West Antarctic Ice Sheet |
author_facet |
Collins, Gemma E. Hogg, Ian D. Convey, Peter Sancho, Leopoldo G. Cowan, Don A. Lyons, W. Berry Adams, Byron J. Wall, Diana H. Green, T.G. Allan |
author_sort |
Collins, Gemma E. |
title |
Genetic diversity of soil invertebrates corroborates timing estimates for past collapses of the West Antarctic Ice Sheet |
title_short |
Genetic diversity of soil invertebrates corroborates timing estimates for past collapses of the West Antarctic Ice Sheet |
title_full |
Genetic diversity of soil invertebrates corroborates timing estimates for past collapses of the West Antarctic Ice Sheet |
title_fullStr |
Genetic diversity of soil invertebrates corroborates timing estimates for past collapses of the West Antarctic Ice Sheet |
title_full_unstemmed |
Genetic diversity of soil invertebrates corroborates timing estimates for past collapses of the West Antarctic Ice Sheet |
title_sort |
genetic diversity of soil invertebrates corroborates timing estimates for past collapses of the west antarctic ice sheet |
publisher |
National Academy of Sciences |
publishDate |
2020 |
url |
http://nora.nerc.ac.uk/id/eprint/527405/ https://nora.nerc.ac.uk/id/eprint/527405/1/2007925117.full.pdf https://www.pnas.org/content/early/2020/08/19/2007925117 |
geographic |
Antarctic Austral Victoria Land West Antarctic Ice Sheet Transantarctic Mountains |
geographic_facet |
Antarctic Austral Victoria Land West Antarctic Ice Sheet Transantarctic Mountains |
genre |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
op_relation |
https://nora.nerc.ac.uk/id/eprint/527405/1/2007925117.full.pdf Collins, Gemma E.; Hogg, Ian D.; Convey, Peter orcid:0000-0001-8497-9903 Sancho, Leopoldo G.; Cowan, Don A.; Lyons, W. Berry; Adams, Byron J.; Wall, Diana H.; Green, T.G. Allan. 2020 Genetic diversity of soil invertebrates corroborates timing estimates for past collapses of the West Antarctic Ice Sheet. Proceedings of the National Academy of Sciences, 117 (36). 22293-22302. https://doi.org/10.1073/pnas.2007925117 <https://doi.org/10.1073/pnas.2007925117> |
op_rights |
cc_by_nc_nd_4 |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1073/pnas.2007925117 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
117 |
container_issue |
36 |
container_start_page |
22293 |
op_container_end_page |
22302 |
_version_ |
1766156797340549120 |