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      Genetic diversity among populations of Antarctic springtails (Collembola) within the Mackay Glacier ecotone

      Beet, Clare Rose; Hogg, Ian D.; Collins, Gemma Elyse; Cowan, Don A.; Wall, Diana H.; Adams, Byron J.
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      2016 beet beet hogg et al version with page numbers.pdf
      Published version, 6.626Mb
      DOI
       10.1139/gen-2015-0194
      Link
       www.nrcresearchpress.com
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      Beet, C. R., Hogg, I. D., Collins, G. E., Cowan, D. A., Wall, D. H., & Adams, B. J. (2016). Genetic diversity among populations of Antarctic springtails (Collembola) within the Mackay Glacier ecotone. Genome, 59, 762–770. https://doi.org/10.1139/gen-2015-0194
      Permanent Research Commons link: https://hdl.handle.net/10289/10264
      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.
      Date
      2016
      Type
      Journal Article
      Publisher
      Canadian Science Publishing
      Rights
      Copyright remains with the author(s) or their institution(s). This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
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