dc.contributor.author |
Beet, Clare R.
|
|
dc.contributor.author |
Hogg, Ian D.
|
|
dc.contributor.author |
Collins, Gemma E.
|
|
dc.contributor.author |
Cowan, Don A.
|
|
dc.contributor.author |
Wall, Diana H.
|
|
dc.contributor.author |
Adams, Byron J.
|
|
dc.date.accessioned |
2016-10-03T12:14:13Z |
|
dc.date.available |
2016-10-03T12:14:13Z |
|
dc.date.issued |
2016 |
|
dc.description |
This paper is part of a special issue entitled Barcodes to Biomes. |
en_ZA |
dc.description.abstract |
Climate changes are likely to have major influences on the distribution and abundance of Antarctic
terrestrial biota. To assess arthropod distribution and diversity within the Ross Sea region, we examined mitochondrial
DNA (COI) sequences for three currently recognized species of springtail (Collembola) collected from
sites in the vicinity, and to the north of, the Mackay Glacier (77°S). This area acts as a transition between two
biogeographic regions (northern and southern Victoria Land). We found populations of highly divergent individuals
(5%–11.3% intraspecific sequence divergence) for each of the three putative springtail species, suggesting the
possibility of cryptic diversity. Based on molecular clock estimates, these divergent lineages are likely to have been
isolated for 3–5 million years. It was during this time that the Western Antarctic Ice Sheet (WAIS) was likely to have
completely collapsed, potentially facilitating springtail dispersal via rafting on running waters and open seaways.
The reformation of the WAIS would have isolated newly established populations, with subsequent dispersal
restricted by glaciers and ice-covered areas. Given the currently limited distributions for these genetically divergent
populations, any future changes in species’ distributions can be easily tracked through the DNA barcoding of
springtails from within the Mackay Glacier ecotone. |
en_ZA |
dc.description.abstract |
Les changements climatiques antérieurs ont vraisemblablement eu des impacts importants sur la
distribution et l’abondance du biota terrestre antarctique. Afin de mesurer la distribution et la diversité des
arthropodes dans la région de la Mer de Ross, nous avons examiné les séquences mitochondriales (COI) chez trois
espèces connues de collemboles récoltés a` proximité ou encore au nord du glacier Mackay (77°S). Cette région
marque aussi la transition entre deux régions biogéographiques (régions septentrionale et méridionale de la terre
de Victoria). Nous avons trouvé des populations constituées d’individus fortement divergents (5 % – 11,3 % de
divergence nucléotidique intraspécifique) au sein des trois espèces de collemboles, ce qui suggère la possibilité
d’une diversité cryptique. Sur la base d’horloges moléculaires, ces groupes divergents seraient isolés depuis 3 a` 5
millions d’années. C’est durant cette période que l’inlandis ouest-antarctique (WAIS, « Western Antarctic Ice Sheet »)
se serait complètement effondré, ce qui aurait pu faciliter la dispersion des collemboles sur des radeaux de glace
flottant sur des cours d’eau ou la mer. La reconstitution de la WAIS pourrait avoir ensuite isolé des populations
nouvellement établies, la dispersion subséquente ayant été limitée par les glaciers et les zones couvertes de glace. Étant
données les distributions présentement limitées des distributions de ces populations divergentes sur le plan génétique,
tout futur changement dans la distribution de ces espèces de collemboles au sein de l’écotone du glacier Mackay pourra
facilement faire l’objet d’un suivi par l’emploi de codes a` barres génétiques. [Traduit par la Rédaction] |
en_ZA |
dc.description.department |
Genetics |
en_ZA |
dc.description.librarian |
am2016 |
en_ZA |
dc.description.sponsorship |
I.D.H. acknowledges Antarctica
New Zealand for logistic support and the New Zealand Antarctic Research Institute (NZARI) for financial
support. C.R.B. was the recipient of a New Zealand
Post Antarctic Scholarship, a University of Waikato Environmental
Research Institute Scholarship, and a Waikato
Graduate Women Educational Trust Scholarship.
Sequencing at the Canadian Centre for DNA Barcoding,
University of Guelph, was supported through funding to
the International Barcode of Life Project (iBOL) from the
Ontario Genomics Institute (2008-OGI-ICI-03), Genome
Canada, the Ontario Ministry of Research and Innovation,
and the Natural Sciences and Engineering Research
Council of Canada. B.J.A. and D.H.W. were supported by
McMurdo LTER NSF OPP grant 1115245. D.A.C. gratefully
acknowledges the financial support of the South African
NRF SANAP program. |
en_ZA |
dc.description.uri |
www.nrcresearchpress.com/gen |
en_ZA |
dc.identifier.citation |
Beet, CR, Hogg, ID, Collins, GE, Cowan, DA, Wall, DH & Adams, BJ 2016, 'Genetic diversity among populations of Antarctic springtails (Collembola) along the Mackay Glacier ecotone', Genome, vol. 59, pp. 762-770. |
en_ZA |
dc.identifier.issn |
0831-2796 (print) |
|
dc.identifier.issn |
1480-3321 (online) |
|
dc.identifier.other |
10.1139/gen-2015-0194 |
|
dc.identifier.uri |
http://hdl.handle.net/2263/57077 |
|
dc.language.iso |
en |
en_ZA |
dc.publisher |
NRC Research Press |
en_ZA |
dc.rights |
Copyright remains with the author(s) or their institution(s). This work is licensed under a Creative Commons Attribution 4.0 International
License. |
en_ZA |
dc.subject |
Antarcticinella monoculata |
en_ZA |
dc.subject |
Biomonitoring |
en_ZA |
dc.subject |
Climate change |
en_ZA |
dc.subject |
Gomphiocephalus hodgsoni |
en_ZA |
dc.subject |
Antarcticinella monoculata |
en_ZA |
dc.subject |
Cryptopygus nivicolus |
en_ZA |
dc.subject |
Biosurveillance |
en_ZA |
dc.subject |
Changements climatiques |
en_ZA |
dc.title |
Genetic diversity among populations of Antarctic springtails (Collembola) along the Mackay Glacier ecotone |
en_ZA |
dc.type |
Article |
en_ZA |