Mite dispersal among the Southern Ocean Islands and Antarctica before the last glacial maximum.
It has long been maintained that the majority of terrestrial Antarctic species are relatively recent, post last glacial maximum, arrivals with perhaps a few microbial or protozoan taxa being substantially older. Recent studies have questioned this 'recolonization hypothesis', though the ra...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
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ftunstellenbosch:oai:scholar.sun.ac.za:10019.1/16964 2023-11-12T04:02:34+01:00 Mite dispersal among the Southern Ocean Islands and Antarctica before the last glacial maximum. Mortimer E. Jansen van Vuuren B. Lee J.E. Marshall D.J. Convey P. Chown S.L. 2011 http://hdl.handle.net/10019.1/16964 http://www.scopus.com/inward/record.url?eid=2-s2.0-79960037756&partnerID=40&md5=4ca4c5b2cd723cf3355c77235e83cf58 https://doi.org/10.1098/rspb.2010.1779 unknown Proceedings. Biological sciences / The Royal Society 278 1709 http://www.scopus.com/inward/record.url?eid=2-s2.0-79960037756&partnerID=40&md5=4ca4c5b2cd723cf3355c77235e83cf58 14712954 doi:10.1098/rspb.2010.1779 http://hdl.handle.net/10019.1/16964 animal Antarctica article biodiversity DNA sequence genetics geography ice cover mite phylogeny physiology Animals Antarctic Regions Mites Sequence Analysis DNA Article 2011 ftunstellenbosch https://doi.org/10.1098/rspb.2010.1779 2023-10-22T07:23:53Z It has long been maintained that the majority of terrestrial Antarctic species are relatively recent, post last glacial maximum, arrivals with perhaps a few microbial or protozoan taxa being substantially older. Recent studies have questioned this 'recolonization hypothesis', though the range of taxa examined has been limited. Here, we present the first large-scale study for mites, one of two dominant terrestrial arthropod groups in the region. Specifically, we provide a broad-scale molecular phylogeny of a biologically significant group of ameronothroid mites from across the maritime and sub-Antarctic regions. Applying different dating approaches, we show that divergences among the ameronothroid mite genera Podacarus, Alaskozetes and Halozetes significantly predate the Pleistocene and provide evidence of independent dispersals across the Antarctic Polar Front. Our data add to a growing body of evidence demonstrating that many taxa have survived glaciation of the Antarctic continent and the sub-Antarctic islands. Moreover, they also provide evidence of a relatively uncommon trend of dispersals from islands to continental mainlands. Within the ameronothroid mites, two distinct clades with specific habitat preferences (marine intertidal versus terrestrial/supralittoral) exist, supporting a model of within-habitat speciation rather than colonization from marine refugia to terrestrial habitats. The present results provide additional impetus for a search for terrestrial refugia in an area previously thought to have lacked ice-free ground during glacial maxima. Article Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean Mite Stellenbosch University: SUNScholar Research Repository Antarctic Southern Ocean The Antarctic Proceedings of the Royal Society B: Biological Sciences 278 1709 1247 1255 |
institution |
Open Polar |
collection |
Stellenbosch University: SUNScholar Research Repository |
op_collection_id |
ftunstellenbosch |
language |
unknown |
topic |
animal Antarctica article biodiversity DNA sequence genetics geography ice cover mite phylogeny physiology Animals Antarctic Regions Mites Sequence Analysis DNA |
spellingShingle |
animal Antarctica article biodiversity DNA sequence genetics geography ice cover mite phylogeny physiology Animals Antarctic Regions Mites Sequence Analysis DNA Mortimer E. Jansen van Vuuren B. Lee J.E. Marshall D.J. Convey P. Chown S.L. Mite dispersal among the Southern Ocean Islands and Antarctica before the last glacial maximum. |
topic_facet |
animal Antarctica article biodiversity DNA sequence genetics geography ice cover mite phylogeny physiology Animals Antarctic Regions Mites Sequence Analysis DNA |
description |
It has long been maintained that the majority of terrestrial Antarctic species are relatively recent, post last glacial maximum, arrivals with perhaps a few microbial or protozoan taxa being substantially older. Recent studies have questioned this 'recolonization hypothesis', though the range of taxa examined has been limited. Here, we present the first large-scale study for mites, one of two dominant terrestrial arthropod groups in the region. Specifically, we provide a broad-scale molecular phylogeny of a biologically significant group of ameronothroid mites from across the maritime and sub-Antarctic regions. Applying different dating approaches, we show that divergences among the ameronothroid mite genera Podacarus, Alaskozetes and Halozetes significantly predate the Pleistocene and provide evidence of independent dispersals across the Antarctic Polar Front. Our data add to a growing body of evidence demonstrating that many taxa have survived glaciation of the Antarctic continent and the sub-Antarctic islands. Moreover, they also provide evidence of a relatively uncommon trend of dispersals from islands to continental mainlands. Within the ameronothroid mites, two distinct clades with specific habitat preferences (marine intertidal versus terrestrial/supralittoral) exist, supporting a model of within-habitat speciation rather than colonization from marine refugia to terrestrial habitats. The present results provide additional impetus for a search for terrestrial refugia in an area previously thought to have lacked ice-free ground during glacial maxima. Article |
format |
Article in Journal/Newspaper |
author |
Mortimer E. Jansen van Vuuren B. Lee J.E. Marshall D.J. Convey P. Chown S.L. |
author_facet |
Mortimer E. Jansen van Vuuren B. Lee J.E. Marshall D.J. Convey P. Chown S.L. |
author_sort |
Mortimer E. |
title |
Mite dispersal among the Southern Ocean Islands and Antarctica before the last glacial maximum. |
title_short |
Mite dispersal among the Southern Ocean Islands and Antarctica before the last glacial maximum. |
title_full |
Mite dispersal among the Southern Ocean Islands and Antarctica before the last glacial maximum. |
title_fullStr |
Mite dispersal among the Southern Ocean Islands and Antarctica before the last glacial maximum. |
title_full_unstemmed |
Mite dispersal among the Southern Ocean Islands and Antarctica before the last glacial maximum. |
title_sort |
mite dispersal among the southern ocean islands and antarctica before the last glacial maximum. |
publishDate |
2011 |
url |
http://hdl.handle.net/10019.1/16964 http://www.scopus.com/inward/record.url?eid=2-s2.0-79960037756&partnerID=40&md5=4ca4c5b2cd723cf3355c77235e83cf58 https://doi.org/10.1098/rspb.2010.1779 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Southern Ocean Mite |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean Mite |
op_relation |
Proceedings. Biological sciences / The Royal Society 278 1709 http://www.scopus.com/inward/record.url?eid=2-s2.0-79960037756&partnerID=40&md5=4ca4c5b2cd723cf3355c77235e83cf58 14712954 doi:10.1098/rspb.2010.1779 http://hdl.handle.net/10019.1/16964 |
op_doi |
https://doi.org/10.1098/rspb.2010.1779 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
278 |
container_issue |
1709 |
container_start_page |
1247 |
op_container_end_page |
1255 |
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