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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ftdoajarticles:oai:doaj.org/article:eeba78fe323a40d4ba500484b8ab1eb6 2023-05-15T14:02:01+02:00 On the origin and trigger of the notothenioid adaptive radiation. Michael Matschiner Reinhold Hanel Walter Salzburger 2011-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0018911 https://doaj.org/article/eeba78fe323a40d4ba500484b8ab1eb6 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC3078932?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0018911 https://doaj.org/article/eeba78fe323a40d4ba500484b8ab1eb6 PLoS ONE, Vol 6, Iss 4, p e18911 (2011) Medicine R Science Q article 2011 ftdoajarticles https://doi.org/10.1371/journal.pone.0018911 2022-12-31T08:16:49Z 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 Directory of Open Access Journals: DOAJ Articles Antarctic PLoS ONE 6 4 e18911 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Michael Matschiner Reinhold Hanel Walter Salzburger On the origin and trigger of the notothenioid adaptive radiation. |
topic_facet |
Medicine R Science Q |
description |
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 |
Michael Matschiner Reinhold Hanel Walter Salzburger |
author_facet |
Michael Matschiner Reinhold Hanel Walter Salzburger |
author_sort |
Michael Matschiner |
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 (PLoS) |
publishDate |
2011 |
url |
https://doi.org/10.1371/journal.pone.0018911 https://doaj.org/article/eeba78fe323a40d4ba500484b8ab1eb6 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_source |
PLoS ONE, Vol 6, Iss 4, p e18911 (2011) |
op_relation |
http://europepmc.org/articles/PMC3078932?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0018911 https://doaj.org/article/eeba78fe323a40d4ba500484b8ab1eb6 |
op_doi |
https://doi.org/10.1371/journal.pone.0018911 |
container_title |
PLoS ONE |
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6 |
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4 |
container_start_page |
e18911 |
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1766272090289209344 |