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...
Published in: | Proceedings of the National Academy of Sciences |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
National Academy of Sciences
2020
|
Subjects: | |
Online Access: | https://hdl.handle.net/10289/13990 https://doi.org/10.1073/pnas.2007925117 |
id |
ftunivwaikato:oai:researchcommons.waikato.ac.nz:10289/13990 |
---|---|
record_format |
openpolar |
spelling |
ftunivwaikato:oai:researchcommons.waikato.ac.nz:10289/13990 2024-02-11T09:57:20+01:00 Genetic diversity of soil invertebrates corroborates timing estimates for past collapses of the West Antarctic Ice Sheet Collins, Gemma Elyse 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 application/pdf https://hdl.handle.net/10289/13990 https://doi.org/10.1073/pnas.2007925117 en eng National Academy of Sciences Proceedings of the National Academy of Sciences Collins, G. E., Hogg, I. D., Convey, P., Sancho, L. G., Cowan, D. A., Lyons, W. B., … Green, T. G. A. (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 0027-8424 https://hdl.handle.net/10289/13990 doi:10.1073/pnas.2007925117 1091-6490 This open access article is distributed under Creative Commons Attribution-NonCommercialNoDerivatives License 4.0 (CC BY-NC-ND). climate change microarthropods molecular clock terrestrial biodiversity phylogeography Journal Article 2020 ftunivwaikato https://doi.org/10.1073/pnas.2007925117 2024-01-23T18:25:34Z 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 ???? oxidase subunit 1 (COI) sequences (????= 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 The University of Waikato: Research Commons Antarctic Austral Victoria Land West Antarctic Ice Sheet Transantarctic Mountains Proceedings of the National Academy of Sciences 117 36 22293 22302 |
institution |
Open Polar |
collection |
The University of Waikato: Research Commons |
op_collection_id |
ftunivwaikato |
language |
English |
topic |
climate change microarthropods molecular clock terrestrial biodiversity phylogeography |
spellingShingle |
climate change microarthropods molecular clock terrestrial biodiversity phylogeography Collins, Gemma Elyse 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 |
topic_facet |
climate change microarthropods molecular clock terrestrial biodiversity phylogeography |
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 ???? oxidase subunit 1 (COI) sequences (????= 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 Elyse 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_facet |
Collins, Gemma Elyse 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 Elyse |
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 |
https://hdl.handle.net/10289/13990 https://doi.org/10.1073/pnas.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 |
Proceedings of the National Academy of Sciences Collins, G. E., Hogg, I. D., Convey, P., Sancho, L. G., Cowan, D. A., Lyons, W. B., … Green, T. G. A. (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 0027-8424 https://hdl.handle.net/10289/13990 doi:10.1073/pnas.2007925117 1091-6490 |
op_rights |
This open access article is distributed under Creative Commons Attribution-NonCommercialNoDerivatives License 4.0 (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_ |
1790609632760168448 |