Mitochondrial DNA analyses reveal widespread tardigrade diversity in Antarctica
Antarctica contains some of the most challenging environmental conditions on the planet due to freezing temperatures, prolonged winters and lack of liquid water. Whereas 99.7% of Antarctica is permanently covered by ice and snow, some coastal areas and mountain ridges have remained ice-free and are...
Published in: | Invertebrate Systematics |
---|---|
Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
CSIRO Publishing
2015
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/512694/ https://nora.nerc.ac.uk/id/eprint/512694/1/Velasco-Castrillon_etal_2015_InvertSyst_Mitochondrial_DNA.pdf https://doi.org/10.1071/IS14019 |
id |
ftnerc:oai:nora.nerc.ac.uk:512694 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:512694 2023-05-15T13:03:41+02:00 Mitochondrial DNA analyses reveal widespread tardigrade diversity in Antarctica Velasco-Castrillon, Alejandro McInnes, Sandra J. Schultz, Mark B. Arroniz-Crespo, Maria D'Haese, Cyrille A. Gibson, John A. E. Adams, Byron J. Page, Timothy J. Austin, Andrew D. Cooper, Steven J. B. Stevens, Mark I. 2015-12 text http://nora.nerc.ac.uk/id/eprint/512694/ https://nora.nerc.ac.uk/id/eprint/512694/1/Velasco-Castrillon_etal_2015_InvertSyst_Mitochondrial_DNA.pdf https://doi.org/10.1071/IS14019 en eng CSIRO Publishing https://nora.nerc.ac.uk/id/eprint/512694/1/Velasco-Castrillon_etal_2015_InvertSyst_Mitochondrial_DNA.pdf Velasco-Castrillon, Alejandro; McInnes, Sandra J. orcid:0000-0003-3403-9379 Schultz, Mark B.; Arroniz-Crespo, Maria; D'Haese, Cyrille A.; Gibson, John A. E.; Adams, Byron J.; Page, Timothy J.; Austin, Andrew D.; Cooper, Steven J. B.; Stevens, Mark I. 2015 Mitochondrial DNA analyses reveal widespread tardigrade diversity in Antarctica. Invertebrate Systematics, 29 (6). 578-590. https://doi.org/10.1071/IS14019 <https://doi.org/10.1071/IS14019> Publication - Article PeerReviewed 2015 ftnerc https://doi.org/10.1071/IS14019 2023-02-04T19:42:35Z Antarctica contains some of the most challenging environmental conditions on the planet due to freezing temperatures, prolonged winters and lack of liquid water. Whereas 99.7% of Antarctica is permanently covered by ice and snow, some coastal areas and mountain ridges have remained ice-free and are able to sustain populations of microinvertebrates. Tardigrades are one of the more dominant groups of microfauna in soil and limno-terrestrial habitats, but little is known of their diversity and distribution across Antarctica. Here, we examine tardigrades sampled from across an extensive region of continental Antarctica, and analyse and compare their partial mitochondrial cytochrome c oxidase subunit 1 (COI) gene sequences with those from the Antarctic Peninsula, maritime and sub-Antarctica, Tierra del Fuego and other worldwide locations in order to recognise operational taxonomic units (OTUs). From 439 new tardigrade COI sequences, we identified 98 unique haplotypes (85 from Antarctica) belonging to Acutuncus, Diphascon, Echiniscus, Macrobiotus, Milnesium and unidentified Parachela. Operational taxonomic units were delimited by Poisson tree processes and general mixed Yule coalescent methods, resulting in 58 and 55 putative species, respectively. Most tardigrades appear to be locally endemic (i.e. restricted to a single geographic region), but some (e.g. Acutuncus antarcticus (Richters, 1904)) are widespread across continental Antarctica. Our molecular results reveal: (i) greater diversity than has previously been appreciated with distinct OTUs that potentially represent undescribed species, and (ii) a lack of connectivity between most OTUs from continental Antarctica and those from other Antarctic geographical zones. Article in Journal/Newspaper Acutuncus antarcticus Antarc* Antarctic Antarctic Peninsula Antarctica antarcticus Tardigrade Tierra del Fuego Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Invertebrate Systematics 29 6 578 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Antarctica contains some of the most challenging environmental conditions on the planet due to freezing temperatures, prolonged winters and lack of liquid water. Whereas 99.7% of Antarctica is permanently covered by ice and snow, some coastal areas and mountain ridges have remained ice-free and are able to sustain populations of microinvertebrates. Tardigrades are one of the more dominant groups of microfauna in soil and limno-terrestrial habitats, but little is known of their diversity and distribution across Antarctica. Here, we examine tardigrades sampled from across an extensive region of continental Antarctica, and analyse and compare their partial mitochondrial cytochrome c oxidase subunit 1 (COI) gene sequences with those from the Antarctic Peninsula, maritime and sub-Antarctica, Tierra del Fuego and other worldwide locations in order to recognise operational taxonomic units (OTUs). From 439 new tardigrade COI sequences, we identified 98 unique haplotypes (85 from Antarctica) belonging to Acutuncus, Diphascon, Echiniscus, Macrobiotus, Milnesium and unidentified Parachela. Operational taxonomic units were delimited by Poisson tree processes and general mixed Yule coalescent methods, resulting in 58 and 55 putative species, respectively. Most tardigrades appear to be locally endemic (i.e. restricted to a single geographic region), but some (e.g. Acutuncus antarcticus (Richters, 1904)) are widespread across continental Antarctica. Our molecular results reveal: (i) greater diversity than has previously been appreciated with distinct OTUs that potentially represent undescribed species, and (ii) a lack of connectivity between most OTUs from continental Antarctica and those from other Antarctic geographical zones. |
format |
Article in Journal/Newspaper |
author |
Velasco-Castrillon, Alejandro McInnes, Sandra J. Schultz, Mark B. Arroniz-Crespo, Maria D'Haese, Cyrille A. Gibson, John A. E. Adams, Byron J. Page, Timothy J. Austin, Andrew D. Cooper, Steven J. B. Stevens, Mark I. |
spellingShingle |
Velasco-Castrillon, Alejandro McInnes, Sandra J. Schultz, Mark B. Arroniz-Crespo, Maria D'Haese, Cyrille A. Gibson, John A. E. Adams, Byron J. Page, Timothy J. Austin, Andrew D. Cooper, Steven J. B. Stevens, Mark I. Mitochondrial DNA analyses reveal widespread tardigrade diversity in Antarctica |
author_facet |
Velasco-Castrillon, Alejandro McInnes, Sandra J. Schultz, Mark B. Arroniz-Crespo, Maria D'Haese, Cyrille A. Gibson, John A. E. Adams, Byron J. Page, Timothy J. Austin, Andrew D. Cooper, Steven J. B. Stevens, Mark I. |
author_sort |
Velasco-Castrillon, Alejandro |
title |
Mitochondrial DNA analyses reveal widespread tardigrade diversity in Antarctica |
title_short |
Mitochondrial DNA analyses reveal widespread tardigrade diversity in Antarctica |
title_full |
Mitochondrial DNA analyses reveal widespread tardigrade diversity in Antarctica |
title_fullStr |
Mitochondrial DNA analyses reveal widespread tardigrade diversity in Antarctica |
title_full_unstemmed |
Mitochondrial DNA analyses reveal widespread tardigrade diversity in Antarctica |
title_sort |
mitochondrial dna analyses reveal widespread tardigrade diversity in antarctica |
publisher |
CSIRO Publishing |
publishDate |
2015 |
url |
http://nora.nerc.ac.uk/id/eprint/512694/ https://nora.nerc.ac.uk/id/eprint/512694/1/Velasco-Castrillon_etal_2015_InvertSyst_Mitochondrial_DNA.pdf https://doi.org/10.1071/IS14019 |
geographic |
Antarctic The Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula |
genre |
Acutuncus antarcticus Antarc* Antarctic Antarctic Peninsula Antarctica antarcticus Tardigrade Tierra del Fuego |
genre_facet |
Acutuncus antarcticus Antarc* Antarctic Antarctic Peninsula Antarctica antarcticus Tardigrade Tierra del Fuego |
op_relation |
https://nora.nerc.ac.uk/id/eprint/512694/1/Velasco-Castrillon_etal_2015_InvertSyst_Mitochondrial_DNA.pdf Velasco-Castrillon, Alejandro; McInnes, Sandra J. orcid:0000-0003-3403-9379 Schultz, Mark B.; Arroniz-Crespo, Maria; D'Haese, Cyrille A.; Gibson, John A. E.; Adams, Byron J.; Page, Timothy J.; Austin, Andrew D.; Cooper, Steven J. B.; Stevens, Mark I. 2015 Mitochondrial DNA analyses reveal widespread tardigrade diversity in Antarctica. Invertebrate Systematics, 29 (6). 578-590. https://doi.org/10.1071/IS14019 <https://doi.org/10.1071/IS14019> |
op_doi |
https://doi.org/10.1071/IS14019 |
container_title |
Invertebrate Systematics |
container_volume |
29 |
container_issue |
6 |
container_start_page |
578 |
_version_ |
1766342078539759616 |