On the origin and trigger of the notothenioid adaptive radiation
Adaptive radiation is usually triggered by ecological opportunity, arising through (i) the colonization of a new habitat by its progenitor; (ii) the extinction of competitors; or (iii) the emergence of an evolutionary key innovation in the ancestral lineage. Support for the key innovation hypothesis...
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ftunivbasel:oai:edoc.unibas.ch:22566 2023-05-15T13:36:10+02:00 On the origin and trigger of the notothenioid adaptive radiation Matschiner, Michael Hanel, Reinhold Salzburger, Walter 2011 http://edoc.unibas.ch/dok/A5849099 https://edoc.unibas.ch/22566/ unknown Public Library of Science Matschiner, Michael and Hanel, Reinhold and Salzburger, Walter. (2011) On the origin and trigger of the notothenioid adaptive radiation. PLoS ONE, Vol. 6, H. 4 , e18911. info:pmid/21533117 urn:ISSN:1932-6203 info:eu-repo/semantics/closedAccess Article PeerReviewed 2011 ftunivbasel 2023-03-05T06:58:11Z Adaptive radiation is usually triggered by ecological opportunity, arising through (i) the colonization of a new habitat by its progenitor; (ii) the extinction of competitors; or (iii) the emergence of an evolutionary key innovation in the ancestral lineage. Support for the key innovation hypothesis is scarce, however, even in textbook examples of adaptive radiation. Antifreeze glycoproteins (AFGPs) have been proposed as putative key innovation for the adaptive radiation of notothenioid fishes in the ice-cold waters of Antarctica. A crucial prerequisite for this assumption is the concurrence of the notothenioid radiation with the onset of Antarctic sea ice conditions. Here, we use a fossil-calibrated multi-marker phylogeny of nothothenioid and related acanthomorph fishes to date AFGP emergence and the notothenioid radiation. All time-constraints are cross-validated to assess their reliability resulting in six powerful calibration points. We find that the notothenioid radiation began near the Oligocene-Miocene transition, which coincides with the increasing presence of Antarctic sea ice. Divergence dates of notothenioids are thus consistent with the key innovation hypothesis of AFGP. Early notothenioid divergences are furthermore congruent with vicariant speciation and the breakup of Gondwana. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice University of Basel: edoc Antarctic |
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University of Basel: edoc |
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Adaptive radiation is usually triggered by ecological opportunity, arising through (i) the colonization of a new habitat by its progenitor; (ii) the extinction of competitors; or (iii) the emergence of an evolutionary key innovation in the ancestral lineage. Support for the key innovation hypothesis is scarce, however, even in textbook examples of adaptive radiation. Antifreeze glycoproteins (AFGPs) have been proposed as putative key innovation for the adaptive radiation of notothenioid fishes in the ice-cold waters of Antarctica. A crucial prerequisite for this assumption is the concurrence of the notothenioid radiation with the onset of Antarctic sea ice conditions. Here, we use a fossil-calibrated multi-marker phylogeny of nothothenioid and related acanthomorph fishes to date AFGP emergence and the notothenioid radiation. All time-constraints are cross-validated to assess their reliability resulting in six powerful calibration points. We find that the notothenioid radiation began near the Oligocene-Miocene transition, which coincides with the increasing presence of Antarctic sea ice. Divergence dates of notothenioids are thus consistent with the key innovation hypothesis of AFGP. Early notothenioid divergences are furthermore congruent with vicariant speciation and the breakup of Gondwana. |
format |
Article in Journal/Newspaper |
author |
Matschiner, Michael Hanel, Reinhold Salzburger, Walter |
spellingShingle |
Matschiner, Michael Hanel, Reinhold Salzburger, Walter On the origin and trigger of the notothenioid adaptive radiation |
author_facet |
Matschiner, Michael Hanel, Reinhold Salzburger, Walter |
author_sort |
Matschiner, Michael |
title |
On the origin and trigger of the notothenioid adaptive radiation |
title_short |
On the origin and trigger of the notothenioid adaptive radiation |
title_full |
On the origin and trigger of the notothenioid adaptive radiation |
title_fullStr |
On the origin and trigger of the notothenioid adaptive radiation |
title_full_unstemmed |
On the origin and trigger of the notothenioid adaptive radiation |
title_sort |
on the origin and trigger of the notothenioid adaptive radiation |
publisher |
Public Library of Science |
publishDate |
2011 |
url |
http://edoc.unibas.ch/dok/A5849099 https://edoc.unibas.ch/22566/ |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_relation |
Matschiner, Michael and Hanel, Reinhold and Salzburger, Walter. (2011) On the origin and trigger of the notothenioid adaptive radiation. PLoS ONE, Vol. 6, H. 4 , e18911. info:pmid/21533117 urn:ISSN:1932-6203 |
op_rights |
info:eu-repo/semantics/closedAccess |
_version_ |
1766075013628166144 |