Somatic mutation and the Antarctic ozone hole

<jats:title>Summary</jats:title><jats:p> <jats:list list-type="explicit-label"> <jats:list-item><jats:p>Previous studies of Antarctic clonal moss populations using RAPD markers have reported extraordinarily high levels of genetic variation. This has been...

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Bibliographic Details
Published in:Journal of Ecology
Main Authors: Clarke, L., Ayre, D., Robinson, S.
Format: Article in Journal/Newspaper
Language:English
Published: Blackwell Publishing Ltd 2008
Subjects:
Antarctica
Ceratodon purpureus
climate change
clonal
genetic variation
microsatellites
ozone depletion
RAPDs
somatic mutation
Windmill Islands
Antarctic
The Antarctic
Antarc*
Online Access:http://hdl.handle.net/2440/65494
https://doi.org/10.1111/j.1365-2745.2007.01347.x
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Summary:<jats:title>Summary</jats:title><jats:p> <jats:list list-type="explicit-label"> <jats:list-item><jats:p>Previous 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.</jats:p></jats:list-item> <jats:list-item><jats:p>Our study used microsatellite markers to compare the genetic variation present within continental Antarctic, sub‐Antarctic and temperate populations of the moss <jats:italic>Ceratodon purpureus</jats:italic>.</jats:p></jats:list-item> <jats:list-item><jats:p>In contrast to the RAPD studies, microsatellite data revealed that <jats:italic>C. purpureus </jats:italic>populations from continental Antarctica display less intra‐population genetic diversity than populations from a range of temperate and sub‐Antarctic sites.</jats:p></jats:list-item> <jats:list-item><jats:p>Analysis of molecular variation (<jats:sc>amova</jats:sc>) revealed that populations within the Windmill Islands region of Antarctica were more genetically differentiated than populations spread among more widely separated temperate regions.</jats:p></jats:list-item> <jats:list-item><jats:p> <jats:italic>Synthesis</jats:italic>. 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.</jats:p></jats:list-item> </jats:list> </jats:p> Laurence J. Clarke, David J. Ayre and Sharon A. Robinson

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