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Somatic mutation and the Antarctic ozone hole
Article first published online: 17 JAN 2008
DOI: 10.1111/j.1365-2745.2007.01347.x
© 2008 The Authors
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How to Cite
Clarke, L. J., Ayre, D. J. and Robinson, S. A. (2008), Somatic mutation and the Antarctic ozone hole. Journal of Ecology, 96: 378–385. doi: 10.1111/j.1365-2745.2007.01347.x
Publication History
- Issue published online: 17 JAN 2008
- Article first published online: 17 JAN 2008
- Received 10 October 2007; accepted 29 November 2007 ; Handling Editor: Joop Ouborg
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Keywords:
- Antarctica;
- Ceratodon purpureus;
- climate change;
- clonal;
- genetic variation;
- microsatellites;
- ozone depletion;
- RAPDs;
- somatic mutation;
- Windmill Islands
Summary
- 1Previous studies of Antarctic clonal moss populations using RAPD markers have reported extraordinarily high levels of genetic variation. This has been claimed to reflect somatic mutation, possibly resulting from elevated UV-B radiation.
- 2Our study used microsatellite markers to compare the genetic variation present within continental Antarctic, sub-Antarctic and temperate populations of the moss Ceratodon purpureus.
- 3In contrast to the RAPD studies, microsatellite data revealed that C. purpureus populations from continental Antarctica display less intra-population genetic diversity than populations from a range of temperate and sub-Antarctic sites.
- 4Analysis of molecular variation (amova) revealed that populations within the Windmill Islands region of Antarctica were more genetically differentiated than populations spread among more widely separated temperate regions.
- 5Synthesis. Our data provide no evidence of elevated mutation rates in the Antarctic, and imply climate change will present ongoing challenges for continental Antarctic moss populations that appear weakly interconnected and with less potential than temperate populations to adapt to environmental change.