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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ftpubmed:oai:pubmedcentral.nih.gov:7486705 2023-05-15T13:39:39+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 2020-09-08 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7486705/ http://www.ncbi.nlm.nih.gov/pubmed/32839321 https://doi.org/10.1073/pnas.2007925117 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7486705/ http://www.ncbi.nlm.nih.gov/pubmed/32839321 http://dx.doi.org/10.1073/pnas.2007925117 Copyright © 2020 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/ https://creativecommons.org/licenses/by-nc-nd/4.0/This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) . CC-BY-NC-ND Proc Natl Acad Sci U S A Biological Sciences Text 2020 ftpubmed https://doi.org/10.1073/pnas.2007925117 2020-09-27T00:23:48Z 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. Text Antarc* Antarctic Antarctica Ice Sheet Victoria Land PubMed Central (PMC) Antarctic Austral Transantarctic Mountains Victoria Land West Antarctic Ice Sheet Proceedings of the National Academy of Sciences 117 36 22293 22302 |
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English |
topic |
Biological Sciences |
spellingShingle |
Biological Sciences 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 |
topic_facet |
Biological Sciences |
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 |
Text |
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 |
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://www.ncbi.nlm.nih.gov/pmc/articles/PMC7486705/ http://www.ncbi.nlm.nih.gov/pubmed/32839321 https://doi.org/10.1073/pnas.2007925117 |
geographic |
Antarctic Austral Transantarctic Mountains Victoria Land West Antarctic Ice Sheet |
geographic_facet |
Antarctic Austral Transantarctic Mountains Victoria Land West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
op_source |
Proc Natl Acad Sci U S A |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7486705/ http://www.ncbi.nlm.nih.gov/pubmed/32839321 http://dx.doi.org/10.1073/pnas.2007925117 |
op_rights |
Copyright © 2020 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/ https://creativecommons.org/licenses/by-nc-nd/4.0/This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) . |
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 |
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1766121930807574528 |