Late Pleistocene colonization of South Georgia by yellow‐billed pintails pre‐dates the Last Glacial Maximum
Abstract Aim Glacial cycles had a major influence on the distribution of high‐latitude species, and while genetic consequences of these cycles have been well studied in the Circumpolar North, notably fewer studies have been undertaken in the Antarctic. Here, we use multilocus genetic data from the S...
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crwiley:10.1111/jbi.12162 2024-09-15T17:44:29+00:00 Late Pleistocene colonization of South Georgia by yellow‐billed pintails pre‐dates the Last Glacial Maximum McCracken, Kevin G. Wilson, Robert E. Peters, Jeffrey L. Winker, Kevin Martin, Anthony R. Patten, Michael Institute of Arctic Biology at the University of Alaska, Fairbanks Experimental Program to Stimulate Competitive Research [National Science Foundation Delta Waterfowl Foundation Frank M. Chapman Fund 2013 http://dx.doi.org/10.1111/jbi.12162 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjbi.12162 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jbi.12162 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Biogeography volume 40, issue 12, page 2348-2360 ISSN 0305-0270 1365-2699 journal-article 2013 crwiley https://doi.org/10.1111/jbi.12162 2024-07-25T04:20:18Z Abstract Aim Glacial cycles had a major influence on the distribution of high‐latitude species, and while genetic consequences of these cycles have been well studied in the Circumpolar North, notably fewer studies have been undertaken in the Antarctic. Here, we use multilocus genetic data from the South Georgia pintail ( Anas georgica georgica ) as a proxy to study the presence and timing of ice‐free refugia on South Georgia, a glaciated subantarctic island in the South Atlantic Ocean that has been the subject of intense geomorphological and palaeoenvironmental study. Location South Georgia. Methods Multilocus DNA sequence data from five nuclear loci and the mitochondrial DNA control region were analysed for South Georgia pintails ( n = 60) and the neighbouring population of yellow‐billed pintails ( A. georgica spinicauda ) in Argentina ( n = 64). Population genetic structure and gene flow were examined using Φ ST , assignment tests, and multilocus coalescent analyses. Results Isolation‐with‐migration (IM) analysis revealed that the South Georgia pintail population was founded by pintails dispersing from South America. Although the confidence intervals on divergence dates inferred from genetic data are generally wide and there may be time‐dependency in rate calibrations, our analysis suggests that this founding event probably occurred c . 34,000 years ago, prior to the Last Glacial Maximum (LGM). Our findings further suggest that South Georgia pintails might have experienced a bottleneck coinciding with complete replacement of mitochondrial DNA prior to 8700 years ago following the final advance of glaciers. Main conclusions These findings suggest that ice‐free refugia existed earlier in the chronology of deglaciation in contrast with earlier studies, but in agreement with observations that the plant community was also established on South Georgia prior to the end of the Pleistocene. Like other recent studies that have utilized genetic data to date dispersal and vicariance events in the Antarctic, our results ... Article in Journal/Newspaper Antarc* Antarctic South Atlantic Ocean Wiley Online Library Journal of Biogeography 40 12 2348 2360 |
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Wiley Online Library |
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English |
description |
Abstract Aim Glacial cycles had a major influence on the distribution of high‐latitude species, and while genetic consequences of these cycles have been well studied in the Circumpolar North, notably fewer studies have been undertaken in the Antarctic. Here, we use multilocus genetic data from the South Georgia pintail ( Anas georgica georgica ) as a proxy to study the presence and timing of ice‐free refugia on South Georgia, a glaciated subantarctic island in the South Atlantic Ocean that has been the subject of intense geomorphological and palaeoenvironmental study. Location South Georgia. Methods Multilocus DNA sequence data from five nuclear loci and the mitochondrial DNA control region were analysed for South Georgia pintails ( n = 60) and the neighbouring population of yellow‐billed pintails ( A. georgica spinicauda ) in Argentina ( n = 64). Population genetic structure and gene flow were examined using Φ ST , assignment tests, and multilocus coalescent analyses. Results Isolation‐with‐migration (IM) analysis revealed that the South Georgia pintail population was founded by pintails dispersing from South America. Although the confidence intervals on divergence dates inferred from genetic data are generally wide and there may be time‐dependency in rate calibrations, our analysis suggests that this founding event probably occurred c . 34,000 years ago, prior to the Last Glacial Maximum (LGM). Our findings further suggest that South Georgia pintails might have experienced a bottleneck coinciding with complete replacement of mitochondrial DNA prior to 8700 years ago following the final advance of glaciers. Main conclusions These findings suggest that ice‐free refugia existed earlier in the chronology of deglaciation in contrast with earlier studies, but in agreement with observations that the plant community was also established on South Georgia prior to the end of the Pleistocene. Like other recent studies that have utilized genetic data to date dispersal and vicariance events in the Antarctic, our results ... |
author2 |
Patten, Michael Institute of Arctic Biology at the University of Alaska, Fairbanks Experimental Program to Stimulate Competitive Research [National Science Foundation Delta Waterfowl Foundation Frank M. Chapman Fund |
format |
Article in Journal/Newspaper |
author |
McCracken, Kevin G. Wilson, Robert E. Peters, Jeffrey L. Winker, Kevin Martin, Anthony R. |
spellingShingle |
McCracken, Kevin G. Wilson, Robert E. Peters, Jeffrey L. Winker, Kevin Martin, Anthony R. Late Pleistocene colonization of South Georgia by yellow‐billed pintails pre‐dates the Last Glacial Maximum |
author_facet |
McCracken, Kevin G. Wilson, Robert E. Peters, Jeffrey L. Winker, Kevin Martin, Anthony R. |
author_sort |
McCracken, Kevin G. |
title |
Late Pleistocene colonization of South Georgia by yellow‐billed pintails pre‐dates the Last Glacial Maximum |
title_short |
Late Pleistocene colonization of South Georgia by yellow‐billed pintails pre‐dates the Last Glacial Maximum |
title_full |
Late Pleistocene colonization of South Georgia by yellow‐billed pintails pre‐dates the Last Glacial Maximum |
title_fullStr |
Late Pleistocene colonization of South Georgia by yellow‐billed pintails pre‐dates the Last Glacial Maximum |
title_full_unstemmed |
Late Pleistocene colonization of South Georgia by yellow‐billed pintails pre‐dates the Last Glacial Maximum |
title_sort |
late pleistocene colonization of south georgia by yellow‐billed pintails pre‐dates the last glacial maximum |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1111/jbi.12162 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjbi.12162 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jbi.12162 |
genre |
Antarc* Antarctic South Atlantic Ocean |
genre_facet |
Antarc* Antarctic South Atlantic Ocean |
op_source |
Journal of Biogeography volume 40, issue 12, page 2348-2360 ISSN 0305-0270 1365-2699 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jbi.12162 |
container_title |
Journal of Biogeography |
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40 |
container_issue |
12 |
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2348 |
op_container_end_page |
2360 |
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1810492093974446080 |