Biogeography and Genetic Diversity of Terrestrial Mites in the Ross Sea Region, Antarctica
Free-living terrestrial mites (Acari) have persisted through numerous glacial cycles in Antarctica. Very little is known, however, of their genetic diversity and distribution, particularly within the Ross Sea region. To redress this gap, we sampled mites throughout the Ross Sea region, East Antarcti...
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ftmdpi:oai:mdpi.com:/2073-4425/14/3/606/ 2023-08-20T04:02:24+02:00 Biogeography and Genetic Diversity of Terrestrial Mites in the Ross Sea Region, Antarctica Gemma E. Collins Monica R. Young Peter Convey Steven L. Chown S. Craig Cary Byron J. Adams Diana H. Wall Ian D. Hogg agris 2023-02-28 application/pdf https://doi.org/10.3390/genes14030606 EN eng Multidisciplinary Digital Publishing Institute Population and Evolutionary Genetics and Genomics https://dx.doi.org/10.3390/genes14030606 https://creativecommons.org/licenses/by/4.0/ Genes; Volume 14; Issue 3; Pages: 606 speciation geographic isolation Acari Antarctic conservation DNA barcoding Text 2023 ftmdpi https://doi.org/10.3390/genes14030606 2023-08-01T09:02:06Z Free-living terrestrial mites (Acari) have persisted through numerous glacial cycles in Antarctica. Very little is known, however, of their genetic diversity and distribution, particularly within the Ross Sea region. To redress this gap, we sampled mites throughout the Ross Sea region, East Antarctica, including Victoria Land and the Queen Maud Mountains (QMM), covering a latitudinal range of 72–85 °S, as well as Lauft Island near Mt. Siple (73 °S) in West Antarctica and Macquarie Island (54oS) in the sub-Antarctic. We assessed genetic diversity using mitochondrial cytochrome c oxidase subunit I gene sequences (COI-5P DNA barcode region), and also morphologically identified voucher specimens. We obtained 130 sequences representing four genera: Nanorchestes (n = 30 sequences), Stereotydeus (n = 46), Coccorhagidia (n = 18) and Eupodes (n = 36). Tree-based analyses (maximum likelihood) revealed 13 genetic clusters, representing as many as 23 putative species indicated by barcode index numbers (BINs) from the Barcode of Life Datasystems (BOLD) database. We found evidence for geographically-isolated cryptic species, e.g., within Stereotydeus belli and S. punctatus, as well as unique genetic groups occurring in sympatry (e.g., Nanorchestes spp. in QMM). Collectively, these data confirm high genetic divergence as a consequence of geographic isolation over evolutionary timescales. From a conservation perspective, additional targeted sampling of understudied areas in the Ross Sea region should be prioritised, as further diversity is likely to be found in these short-range endemic mites. Text Antarc* Antarctic Antarctica East Antarctica Macquarie Island Ross Sea Victoria Land West Antarctica MDPI Open Access Publishing Antarctic East Antarctica Ross Sea Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Victoria Land West Antarctica Genes 14 3 606 |
institution |
Open Polar |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
speciation geographic isolation Acari Antarctic conservation DNA barcoding |
spellingShingle |
speciation geographic isolation Acari Antarctic conservation DNA barcoding Gemma E. Collins Monica R. Young Peter Convey Steven L. Chown S. Craig Cary Byron J. Adams Diana H. Wall Ian D. Hogg Biogeography and Genetic Diversity of Terrestrial Mites in the Ross Sea Region, Antarctica |
topic_facet |
speciation geographic isolation Acari Antarctic conservation DNA barcoding |
description |
Free-living terrestrial mites (Acari) have persisted through numerous glacial cycles in Antarctica. Very little is known, however, of their genetic diversity and distribution, particularly within the Ross Sea region. To redress this gap, we sampled mites throughout the Ross Sea region, East Antarctica, including Victoria Land and the Queen Maud Mountains (QMM), covering a latitudinal range of 72–85 °S, as well as Lauft Island near Mt. Siple (73 °S) in West Antarctica and Macquarie Island (54oS) in the sub-Antarctic. We assessed genetic diversity using mitochondrial cytochrome c oxidase subunit I gene sequences (COI-5P DNA barcode region), and also morphologically identified voucher specimens. We obtained 130 sequences representing four genera: Nanorchestes (n = 30 sequences), Stereotydeus (n = 46), Coccorhagidia (n = 18) and Eupodes (n = 36). Tree-based analyses (maximum likelihood) revealed 13 genetic clusters, representing as many as 23 putative species indicated by barcode index numbers (BINs) from the Barcode of Life Datasystems (BOLD) database. We found evidence for geographically-isolated cryptic species, e.g., within Stereotydeus belli and S. punctatus, as well as unique genetic groups occurring in sympatry (e.g., Nanorchestes spp. in QMM). Collectively, these data confirm high genetic divergence as a consequence of geographic isolation over evolutionary timescales. From a conservation perspective, additional targeted sampling of understudied areas in the Ross Sea region should be prioritised, as further diversity is likely to be found in these short-range endemic mites. |
format |
Text |
author |
Gemma E. Collins Monica R. Young Peter Convey Steven L. Chown S. Craig Cary Byron J. Adams Diana H. Wall Ian D. Hogg |
author_facet |
Gemma E. Collins Monica R. Young Peter Convey Steven L. Chown S. Craig Cary Byron J. Adams Diana H. Wall Ian D. Hogg |
author_sort |
Gemma E. Collins |
title |
Biogeography and Genetic Diversity of Terrestrial Mites in the Ross Sea Region, Antarctica |
title_short |
Biogeography and Genetic Diversity of Terrestrial Mites in the Ross Sea Region, Antarctica |
title_full |
Biogeography and Genetic Diversity of Terrestrial Mites in the Ross Sea Region, Antarctica |
title_fullStr |
Biogeography and Genetic Diversity of Terrestrial Mites in the Ross Sea Region, Antarctica |
title_full_unstemmed |
Biogeography and Genetic Diversity of Terrestrial Mites in the Ross Sea Region, Antarctica |
title_sort |
biogeography and genetic diversity of terrestrial mites in the ross sea region, antarctica |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/genes14030606 |
op_coverage |
agris |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) |
geographic |
Antarctic East Antarctica Ross Sea Siple Victoria Land West Antarctica |
geographic_facet |
Antarctic East Antarctica Ross Sea Siple Victoria Land West Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica Macquarie Island Ross Sea Victoria Land West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Macquarie Island Ross Sea Victoria Land West Antarctica |
op_source |
Genes; Volume 14; Issue 3; Pages: 606 |
op_relation |
Population and Evolutionary Genetics and Genomics https://dx.doi.org/10.3390/genes14030606 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/genes14030606 |
container_title |
Genes |
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14 |
container_issue |
3 |
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606 |
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1774712842200547328 |