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 range of tax...
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ftpubmed:oai:pubmedcentral.nih.gov:3049079 2023-05-15T13:34:52+02:00 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. 2011-04-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3049079 http://www.ncbi.nlm.nih.gov/pubmed/20943685 https://doi.org/10.1098/rspb.2010.1779 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3049079 http://www.ncbi.nlm.nih.gov/pubmed/20943685 http://dx.doi.org/10.1098/rspb.2010.1779 This Journal is © 2010 The Royal Society Research Articles Text 2011 ftpubmed https://doi.org/10.1098/rspb.2010.1779 2013-09-03T11:42:55Z 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. Text Antarc* Antarctic Antarctica Southern Ocean Mite PubMed Central (PMC) Antarctic Southern Ocean The Antarctic Proceedings of the Royal Society B: Biological Sciences 278 1709 1247 1255 |
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Research Articles 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 |
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Research Articles |
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. |
format |
Text |
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 |
publisher |
The Royal Society |
publishDate |
2011 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3049079 http://www.ncbi.nlm.nih.gov/pubmed/20943685 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 |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3049079 http://www.ncbi.nlm.nih.gov/pubmed/20943685 http://dx.doi.org/10.1098/rspb.2010.1779 |
op_rights |
This Journal is © 2010 The Royal Society |
op_doi |
https://doi.org/10.1098/rspb.2010.1779 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
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278 |
container_issue |
1709 |
container_start_page |
1247 |
op_container_end_page |
1255 |
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1766058743987961856 |