Microevolution and mega-icebergs in Antarctica
Microevolution is regarded as changes in the frequencies of genes in populations over time. Ancient DNA technology now provides an opportunity to demonstrate evolution over a geological time frame and to possibly identify the causal factors in any such evolutionary event. Using nine nuclear microsat...
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Online Access: | http://hdl.handle.net/11568/98044 https://doi.org/10.1073/pnas.0502281102 |
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ftunivpisairis:oai:arpi.unipi.it:11568/98044 2024-02-27T08:33:47+00:00 Microevolution and mega-icebergs in Antarctica SHEPHERD L. D MILLAR C. D BALLARD G AINLEY D. G WILSON P. R HAYNES G. D LAMBERT D. M. BARONI, CARLO SHEPHERD L., D MILLAR C., D Ballard, G AINLEY D., G WILSON P., R HAYNES G., D Baroni, Carlo Lambert, D. M. 2005 STAMPA http://hdl.handle.net/11568/98044 https://doi.org/10.1073/pnas.0502281102 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000233462900036 volume:102 issue:46 firstpage:16717 lastpage:16722 numberofpages:6 journal:PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA http://hdl.handle.net/11568/98044 doi:10.1073/pnas.0502281102 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-28044432555 microsatellite Adélie Penguin Pygoscelis adeliae ancient DNA environmental change Climate change Ross Sea Antarctica info:eu-repo/semantics/article 2005 ftunivpisairis https://doi.org/10.1073/pnas.0502281102 2024-01-31T17:41:50Z Microevolution is regarded as changes in the frequencies of genes in populations over time. Ancient DNA technology now provides an opportunity to demonstrate evolution over a geological time frame and to possibly identify the causal factors in any such evolutionary event. Using nine nuclear microsatellite DNA loci, we genotyped an ancient population of Ade´ lie penguins (Pygoscelis adeliae) aged _6,000 years B.P. Subfossil bones from this population were excavated by using an accurate stratigraphic method that allowed the identification of individuals even within the same layer. We compared the allele frequencies in the ancient population with those recorded from the modern population at the same site in Antarctica. We report significant changes in the frequencies of alleles between these two time points, hence demonstrating microevolutionary change. This study demonstrates a nuclear gene-frequency change over such a geological time frame. We discuss the possible causes of such a change, including the role of mutation, genetic drift, and the effects of gene mixing among different penguin populations. The latter is likely to be precipitated by mega-icebergs that act to promote migration among penguin colonies that typically show strong natal return. Article in Journal/Newspaper Antarc* Antarctica Pygoscelis adeliae Ross Sea ARPI - Archivio della Ricerca dell'Università di Pisa Ross Sea Proceedings of the National Academy of Sciences 102 46 16717 16722 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
microsatellite Adélie Penguin Pygoscelis adeliae ancient DNA environmental change Climate change Ross Sea Antarctica |
spellingShingle |
microsatellite Adélie Penguin Pygoscelis adeliae ancient DNA environmental change Climate change Ross Sea Antarctica SHEPHERD L. D MILLAR C. D BALLARD G AINLEY D. G WILSON P. R HAYNES G. D LAMBERT D. M. BARONI, CARLO Microevolution and mega-icebergs in Antarctica |
topic_facet |
microsatellite Adélie Penguin Pygoscelis adeliae ancient DNA environmental change Climate change Ross Sea Antarctica |
description |
Microevolution is regarded as changes in the frequencies of genes in populations over time. Ancient DNA technology now provides an opportunity to demonstrate evolution over a geological time frame and to possibly identify the causal factors in any such evolutionary event. Using nine nuclear microsatellite DNA loci, we genotyped an ancient population of Ade´ lie penguins (Pygoscelis adeliae) aged _6,000 years B.P. Subfossil bones from this population were excavated by using an accurate stratigraphic method that allowed the identification of individuals even within the same layer. We compared the allele frequencies in the ancient population with those recorded from the modern population at the same site in Antarctica. We report significant changes in the frequencies of alleles between these two time points, hence demonstrating microevolutionary change. This study demonstrates a nuclear gene-frequency change over such a geological time frame. We discuss the possible causes of such a change, including the role of mutation, genetic drift, and the effects of gene mixing among different penguin populations. The latter is likely to be precipitated by mega-icebergs that act to promote migration among penguin colonies that typically show strong natal return. |
author2 |
SHEPHERD L., D MILLAR C., D Ballard, G AINLEY D., G WILSON P., R HAYNES G., D Baroni, Carlo Lambert, D. M. |
format |
Article in Journal/Newspaper |
author |
SHEPHERD L. D MILLAR C. D BALLARD G AINLEY D. G WILSON P. R HAYNES G. D LAMBERT D. M. BARONI, CARLO |
author_facet |
SHEPHERD L. D MILLAR C. D BALLARD G AINLEY D. G WILSON P. R HAYNES G. D LAMBERT D. M. BARONI, CARLO |
author_sort |
SHEPHERD L. D |
title |
Microevolution and mega-icebergs in Antarctica |
title_short |
Microevolution and mega-icebergs in Antarctica |
title_full |
Microevolution and mega-icebergs in Antarctica |
title_fullStr |
Microevolution and mega-icebergs in Antarctica |
title_full_unstemmed |
Microevolution and mega-icebergs in Antarctica |
title_sort |
microevolution and mega-icebergs in antarctica |
publishDate |
2005 |
url |
http://hdl.handle.net/11568/98044 https://doi.org/10.1073/pnas.0502281102 |
geographic |
Ross Sea |
geographic_facet |
Ross Sea |
genre |
Antarc* Antarctica Pygoscelis adeliae Ross Sea |
genre_facet |
Antarc* Antarctica Pygoscelis adeliae Ross Sea |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000233462900036 volume:102 issue:46 firstpage:16717 lastpage:16722 numberofpages:6 journal:PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA http://hdl.handle.net/11568/98044 doi:10.1073/pnas.0502281102 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-28044432555 |
op_doi |
https://doi.org/10.1073/pnas.0502281102 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
102 |
container_issue |
46 |
container_start_page |
16717 |
op_container_end_page |
16722 |
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1792047873100087296 |