High levels of intraspecific genetic divergences revealed for Antarctic springtails: evidence for small-scale isolation during Pleistocene glaciation
We examined levels of genetic variability within and among populations of three Antarctic springtail species (Arthropoda: Collembola) and tested the hypothesis that genetic divergences occur among glacially-isolated habitats. The study was conducted in southern Victoria Land, Ross Dependency, Antarc...
Published in: | Biological Journal of the Linnean Society |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley-Blackwell
2016
|
Subjects: | |
Online Access: | https://hdl.handle.net/10289/10279 https://doi.org/10.1111/bij.12796 |
id |
ftunivwaikato:oai:researchcommons.waikato.ac.nz:10289/10279 |
---|---|
record_format |
openpolar |
spelling |
ftunivwaikato:oai:researchcommons.waikato.ac.nz:10289/10279 2023-12-24T10:11:32+01:00 High levels of intraspecific genetic divergences revealed for Antarctic springtails: evidence for small-scale isolation during Pleistocene glaciation Bennett, Kristi R. Hogg, Ian D. Adams, Byron J. Hebert, Paul D.N. 2016 application/pdf https://hdl.handle.net/10289/10279 https://doi.org/10.1111/bij.12796 en eng Wiley-Blackwell http://onlinelibrary.wiley.com/doi/10.1111/bij.12796/abstract Biological Journal of the Linnean Society Bennett, K. R., Hogg, I. D., Adams, B. J., & Hebert, P. D. N. (2016). High levels of intraspecific genetic divergences revealed for Antarctic springtails: evidence for small-scale isolation during Pleistocene glaciation. Biological Journal of the Linnean Society. http://doi.org/10.1111/bij.12796 0024-4066 https://hdl.handle.net/10289/10279 doi:10.1111/bij.12796 This is an author’s accepted version of an article published in the journal: Biological Journal of the Linnean Society. © 2016 The Linnean Society of London, Biological Journal of the Linnean Societ Collembola glaciation population genetics refugia Ross Sea region springtails Journal Article 2016 ftunivwaikato https://doi.org/10.1111/bij.12796 2023-11-28T18:25:41Z We examined levels of genetic variability within and among populations of three Antarctic springtail species (Arthropoda: Collembola) and tested the hypothesis that genetic divergences occur among glacially-isolated habitats. The study was conducted in southern Victoria Land, Ross Dependency, Antarctica, and samples were collected from locations in the vicinity of the Mackay Glacier. We analyzed mtDNA (cytochrome c oxidase subunit I; COI) sequence variability for 97 individuals representing three species (Gomphiocephalus hodgsoni, N = 67; Cryptopygus nivicolus, N = 20; and Antarcticinella monoculata, N = 8). Haplotype diversity and genetic divergences were calculated and used to indicate population variability and also to infer divergence times of isolated populations using molecular clock estimates. Two of the three species showed high levels of genetic divergence. Gomphiocephalus hodgsoni, a widespread and common species, showed 7.6% sequence divergence on opposite sides of the Mackay Glacier. The more range restricted C. nivicolus showed 4.0% divergence among populations. The third species, A. monoculata, was found in only one location. Molecular clock estimates based on sequence divergences suggest that populations separated within the last 4 Mya. We conclude that habitat fragmentation resulting from Pliocene (5 Mya) and Pleistocene (2 Mya to 10 Kya) glaciations has promoted and maintained high levels of diversity among isolated springtail populations on relatively small spatial scales. The region surrounding the Mackay Glacier is likely to have provided refugia for springtail populations during glacial maxima and remains an area of high genetic and species diversity for Collembola within the Ross Sea region. Article in Journal/Newspaper Antarc* Antarctic Antarctic Springtail Antarctica Antarcticinella monoculata Gomphiocephalus hodgsoni Ross Dependency Ross Sea Victoria Land Springtail The University of Waikato: Research Commons Antarctic Kya ENVELOPE(8.308,8.308,63.772,63.772) Mackay ENVELOPE(168.517,168.517,-77.700,-77.700) Mackay Glacier ENVELOPE(162.000,162.000,-76.967,-76.967) Ross Dependency ENVELOPE(160.000,160.000,-60.000,-60.000) Ross Sea Victoria Land Biological Journal of the Linnean Society 119 1 166 178 |
institution |
Open Polar |
collection |
The University of Waikato: Research Commons |
op_collection_id |
ftunivwaikato |
language |
English |
topic |
Collembola glaciation population genetics refugia Ross Sea region springtails |
spellingShingle |
Collembola glaciation population genetics refugia Ross Sea region springtails Bennett, Kristi R. Hogg, Ian D. Adams, Byron J. Hebert, Paul D.N. High levels of intraspecific genetic divergences revealed for Antarctic springtails: evidence for small-scale isolation during Pleistocene glaciation |
topic_facet |
Collembola glaciation population genetics refugia Ross Sea region springtails |
description |
We examined levels of genetic variability within and among populations of three Antarctic springtail species (Arthropoda: Collembola) and tested the hypothesis that genetic divergences occur among glacially-isolated habitats. The study was conducted in southern Victoria Land, Ross Dependency, Antarctica, and samples were collected from locations in the vicinity of the Mackay Glacier. We analyzed mtDNA (cytochrome c oxidase subunit I; COI) sequence variability for 97 individuals representing three species (Gomphiocephalus hodgsoni, N = 67; Cryptopygus nivicolus, N = 20; and Antarcticinella monoculata, N = 8). Haplotype diversity and genetic divergences were calculated and used to indicate population variability and also to infer divergence times of isolated populations using molecular clock estimates. Two of the three species showed high levels of genetic divergence. Gomphiocephalus hodgsoni, a widespread and common species, showed 7.6% sequence divergence on opposite sides of the Mackay Glacier. The more range restricted C. nivicolus showed 4.0% divergence among populations. The third species, A. monoculata, was found in only one location. Molecular clock estimates based on sequence divergences suggest that populations separated within the last 4 Mya. We conclude that habitat fragmentation resulting from Pliocene (5 Mya) and Pleistocene (2 Mya to 10 Kya) glaciations has promoted and maintained high levels of diversity among isolated springtail populations on relatively small spatial scales. The region surrounding the Mackay Glacier is likely to have provided refugia for springtail populations during glacial maxima and remains an area of high genetic and species diversity for Collembola within the Ross Sea region. |
format |
Article in Journal/Newspaper |
author |
Bennett, Kristi R. Hogg, Ian D. Adams, Byron J. Hebert, Paul D.N. |
author_facet |
Bennett, Kristi R. Hogg, Ian D. Adams, Byron J. Hebert, Paul D.N. |
author_sort |
Bennett, Kristi R. |
title |
High levels of intraspecific genetic divergences revealed for Antarctic springtails: evidence for small-scale isolation during Pleistocene glaciation |
title_short |
High levels of intraspecific genetic divergences revealed for Antarctic springtails: evidence for small-scale isolation during Pleistocene glaciation |
title_full |
High levels of intraspecific genetic divergences revealed for Antarctic springtails: evidence for small-scale isolation during Pleistocene glaciation |
title_fullStr |
High levels of intraspecific genetic divergences revealed for Antarctic springtails: evidence for small-scale isolation during Pleistocene glaciation |
title_full_unstemmed |
High levels of intraspecific genetic divergences revealed for Antarctic springtails: evidence for small-scale isolation during Pleistocene glaciation |
title_sort |
high levels of intraspecific genetic divergences revealed for antarctic springtails: evidence for small-scale isolation during pleistocene glaciation |
publisher |
Wiley-Blackwell |
publishDate |
2016 |
url |
https://hdl.handle.net/10289/10279 https://doi.org/10.1111/bij.12796 |
long_lat |
ENVELOPE(8.308,8.308,63.772,63.772) ENVELOPE(168.517,168.517,-77.700,-77.700) ENVELOPE(162.000,162.000,-76.967,-76.967) ENVELOPE(160.000,160.000,-60.000,-60.000) |
geographic |
Antarctic Kya Mackay Mackay Glacier Ross Dependency Ross Sea Victoria Land |
geographic_facet |
Antarctic Kya Mackay Mackay Glacier Ross Dependency Ross Sea Victoria Land |
genre |
Antarc* Antarctic Antarctic Springtail Antarctica Antarcticinella monoculata Gomphiocephalus hodgsoni Ross Dependency Ross Sea Victoria Land Springtail |
genre_facet |
Antarc* Antarctic Antarctic Springtail Antarctica Antarcticinella monoculata Gomphiocephalus hodgsoni Ross Dependency Ross Sea Victoria Land Springtail |
op_relation |
http://onlinelibrary.wiley.com/doi/10.1111/bij.12796/abstract Biological Journal of the Linnean Society Bennett, K. R., Hogg, I. D., Adams, B. J., & Hebert, P. D. N. (2016). High levels of intraspecific genetic divergences revealed for Antarctic springtails: evidence for small-scale isolation during Pleistocene glaciation. Biological Journal of the Linnean Society. http://doi.org/10.1111/bij.12796 0024-4066 https://hdl.handle.net/10289/10279 doi:10.1111/bij.12796 |
op_rights |
This is an author’s accepted version of an article published in the journal: Biological Journal of the Linnean Society. © 2016 The Linnean Society of London, Biological Journal of the Linnean Societ |
op_doi |
https://doi.org/10.1111/bij.12796 |
container_title |
Biological Journal of the Linnean Society |
container_volume |
119 |
container_issue |
1 |
container_start_page |
166 |
op_container_end_page |
178 |
_version_ |
1786166605936328704 |