Exploring biological constraints on the glacial history of Antarctica
The evolutionary and biogeographic history of the contemporary Antarctic terrestrial and marine biotas reveals many components of ancient origin. For large elements of the terrestrial biota, long-term isolation over timescales from hundreds of thousands to tens of millions of years, and thus persist...
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ftangliruskinfig:oai:figshare.com:article/23773701 2023-11-12T04:08:21+01:00 Exploring biological constraints on the glacial history of Antarctica Peter Convey Mark I. Stevens Dominic A. Hodgson John L. Smellie Claus-Dieter Hillenbrand David K. A. Barnes Andrew Clarke Philip J. A. Pugh Katrin Linse S. Craig Cary 2009-12-01T00:00:00Z https://figshare.com/articles/journal_contribution/Exploring_biological_constraints_on_the_glacial_history_of_Antarctica/23773701 unknown 10779/aru.23773701.v1 https://figshare.com/articles/journal_contribution/Exploring_biological_constraints_on_the_glacial_history_of_Antarctica/23773701 CC BY 4.0 research Text Journal contribution 2009 ftangliruskinfig 2023-10-13T12:23:14Z The evolutionary and biogeographic history of the contemporary Antarctic terrestrial and marine biotas reveals many components of ancient origin. For large elements of the terrestrial biota, long-term isolation over timescales from hundreds of thousands to tens of millions of years, and thus persistence through multiple glacial cycles, now appears to be the norm rather than the exception. For the marine biota there are some parallels with benthic communities also including ancient components, together with an incidence of species-level endemism indicating long-term isolation on the Antarctic continental shelf. Although it has long been known that a few ice-free terrestrial locations have existed in Antarctica for up to 10–12 million years, particularly in the Dry Valleys of Victoria Land along with certain nunataks and higher regions of large mountain ranges, these do not provide potential refugia for the majority of terrestrial biota, which occur mainly in coastal and/or low-lying locations and exhibit considerable biogeographic regionalisation within the continent. Current glacial models and reconstructions do not have the spatial resolution to detect unequivocally either the number or geographical distribution of these glacial refugia, or areas of the continental shelf that have remained periodically free from ice scouring, but do provide limits for their maximum spatial extent. Recent work on the evolution of the terrestrial biota indicates that refugia were much more widespread than has been recognised and it is now clear that terrestrial biology provides novel constraints for reconstructing the past glacial history of Antarctica, and new marine biological investigations of the Antarctic shelf are starting to do likewise. Article in Journal/Newspaper Antarc* Antarctic Antarctica Victoria Land Anglia Ruskin University: Figshare Antarctic The Antarctic Victoria Land |
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research Peter Convey Mark I. Stevens Dominic A. Hodgson John L. Smellie Claus-Dieter Hillenbrand David K. A. Barnes Andrew Clarke Philip J. A. Pugh Katrin Linse S. Craig Cary Exploring biological constraints on the glacial history of Antarctica |
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research |
description |
The evolutionary and biogeographic history of the contemporary Antarctic terrestrial and marine biotas reveals many components of ancient origin. For large elements of the terrestrial biota, long-term isolation over timescales from hundreds of thousands to tens of millions of years, and thus persistence through multiple glacial cycles, now appears to be the norm rather than the exception. For the marine biota there are some parallels with benthic communities also including ancient components, together with an incidence of species-level endemism indicating long-term isolation on the Antarctic continental shelf. Although it has long been known that a few ice-free terrestrial locations have existed in Antarctica for up to 10–12 million years, particularly in the Dry Valleys of Victoria Land along with certain nunataks and higher regions of large mountain ranges, these do not provide potential refugia for the majority of terrestrial biota, which occur mainly in coastal and/or low-lying locations and exhibit considerable biogeographic regionalisation within the continent. Current glacial models and reconstructions do not have the spatial resolution to detect unequivocally either the number or geographical distribution of these glacial refugia, or areas of the continental shelf that have remained periodically free from ice scouring, but do provide limits for their maximum spatial extent. Recent work on the evolution of the terrestrial biota indicates that refugia were much more widespread than has been recognised and it is now clear that terrestrial biology provides novel constraints for reconstructing the past glacial history of Antarctica, and new marine biological investigations of the Antarctic shelf are starting to do likewise. |
format |
Article in Journal/Newspaper |
author |
Peter Convey Mark I. Stevens Dominic A. Hodgson John L. Smellie Claus-Dieter Hillenbrand David K. A. Barnes Andrew Clarke Philip J. A. Pugh Katrin Linse S. Craig Cary |
author_facet |
Peter Convey Mark I. Stevens Dominic A. Hodgson John L. Smellie Claus-Dieter Hillenbrand David K. A. Barnes Andrew Clarke Philip J. A. Pugh Katrin Linse S. Craig Cary |
author_sort |
Peter Convey |
title |
Exploring biological constraints on the glacial history of Antarctica |
title_short |
Exploring biological constraints on the glacial history of Antarctica |
title_full |
Exploring biological constraints on the glacial history of Antarctica |
title_fullStr |
Exploring biological constraints on the glacial history of Antarctica |
title_full_unstemmed |
Exploring biological constraints on the glacial history of Antarctica |
title_sort |
exploring biological constraints on the glacial history of antarctica |
publishDate |
2009 |
url |
https://figshare.com/articles/journal_contribution/Exploring_biological_constraints_on_the_glacial_history_of_Antarctica/23773701 |
geographic |
Antarctic The Antarctic Victoria Land |
geographic_facet |
Antarctic The Antarctic Victoria Land |
genre |
Antarc* Antarctic Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Victoria Land |
op_relation |
10779/aru.23773701.v1 https://figshare.com/articles/journal_contribution/Exploring_biological_constraints_on_the_glacial_history_of_Antarctica/23773701 |
op_rights |
CC BY 4.0 |
_version_ |
1782328670888656896 |