Ecomorphological disparity in an adaptive radiation: opercular bone shape and stable isotopes in Antarctic icefishes
Abstract To assess how ecological and morphological disparity is interrelated in the adaptive radiation of Antarctic notothenioid fish we used patterns of opercle bone evolution as a model to quantify shape disparity, phylogenetic patterns of shape evolution, and ecological correlates in the form of...
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crwiley:10.1002/ece3.708 2024-06-02T07:57:10+00:00 Ecomorphological disparity in an adaptive radiation: opercular bone shape and stable isotopes in Antarctic icefishes Wilson, Laura A. B. Colombo, Marco Hanel, Reinhold Salzburger, Walter Sánchez‐Villagra, Marcelo R. Swiss National Fund Sinergia Swiss National Science Fund 2013 http://dx.doi.org/10.1002/ece3.708 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.708 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.708 en eng Wiley http://creativecommons.org/licenses/by/3.0/ Ecology and Evolution volume 3, issue 9, page 3166-3182 ISSN 2045-7758 2045-7758 journal-article 2013 crwiley https://doi.org/10.1002/ece3.708 2024-05-03T10:37:35Z Abstract To assess how ecological and morphological disparity is interrelated in the adaptive radiation of Antarctic notothenioid fish we used patterns of opercle bone evolution as a model to quantify shape disparity, phylogenetic patterns of shape evolution, and ecological correlates in the form of stable isotope values. Using a sample of 25 species including representatives from four major notothenioid clades, we show that opercle shape disparity is higher in the modern fauna than would be expected under the neutral evolution Brownian motion model. Phylogenetic comparative methods indicate that opercle shape data best fit a model of directional selection (Ornstein–Uhlenbeck) and are least supported by the “early burst” model of adaptive radiation. The main evolutionary axis of opercle shape change reflects movement from a broad and more symmetrically tapered opercle to one that narrows along the distal margin, but with only slight shape change on the proximal margin. We find a trend in opercle shape change along the benthic–pelagic axis, underlining the importance of this axis for diversification in the notothenioid radiation. A major impetus for the study of adaptive radiations is to uncover generalized patterns among different groups, and the evolutionary patterns in opercle shape among notothenioids are similar to those found among other adaptive radiations (three‐spined sticklebacks) promoting the utility of this approach for assessing ecomorphological interactions on a broad scale. Article in Journal/Newspaper Antarc* Antarctic Wiley Online Library Antarctic Ecology and Evolution 3 9 3166 3182 |
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Wiley Online Library |
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language |
English |
description |
Abstract To assess how ecological and morphological disparity is interrelated in the adaptive radiation of Antarctic notothenioid fish we used patterns of opercle bone evolution as a model to quantify shape disparity, phylogenetic patterns of shape evolution, and ecological correlates in the form of stable isotope values. Using a sample of 25 species including representatives from four major notothenioid clades, we show that opercle shape disparity is higher in the modern fauna than would be expected under the neutral evolution Brownian motion model. Phylogenetic comparative methods indicate that opercle shape data best fit a model of directional selection (Ornstein–Uhlenbeck) and are least supported by the “early burst” model of adaptive radiation. The main evolutionary axis of opercle shape change reflects movement from a broad and more symmetrically tapered opercle to one that narrows along the distal margin, but with only slight shape change on the proximal margin. We find a trend in opercle shape change along the benthic–pelagic axis, underlining the importance of this axis for diversification in the notothenioid radiation. A major impetus for the study of adaptive radiations is to uncover generalized patterns among different groups, and the evolutionary patterns in opercle shape among notothenioids are similar to those found among other adaptive radiations (three‐spined sticklebacks) promoting the utility of this approach for assessing ecomorphological interactions on a broad scale. |
author2 |
Swiss National Fund Sinergia Swiss National Science Fund |
format |
Article in Journal/Newspaper |
author |
Wilson, Laura A. B. Colombo, Marco Hanel, Reinhold Salzburger, Walter Sánchez‐Villagra, Marcelo R. |
spellingShingle |
Wilson, Laura A. B. Colombo, Marco Hanel, Reinhold Salzburger, Walter Sánchez‐Villagra, Marcelo R. Ecomorphological disparity in an adaptive radiation: opercular bone shape and stable isotopes in Antarctic icefishes |
author_facet |
Wilson, Laura A. B. Colombo, Marco Hanel, Reinhold Salzburger, Walter Sánchez‐Villagra, Marcelo R. |
author_sort |
Wilson, Laura A. B. |
title |
Ecomorphological disparity in an adaptive radiation: opercular bone shape and stable isotopes in Antarctic icefishes |
title_short |
Ecomorphological disparity in an adaptive radiation: opercular bone shape and stable isotopes in Antarctic icefishes |
title_full |
Ecomorphological disparity in an adaptive radiation: opercular bone shape and stable isotopes in Antarctic icefishes |
title_fullStr |
Ecomorphological disparity in an adaptive radiation: opercular bone shape and stable isotopes in Antarctic icefishes |
title_full_unstemmed |
Ecomorphological disparity in an adaptive radiation: opercular bone shape and stable isotopes in Antarctic icefishes |
title_sort |
ecomorphological disparity in an adaptive radiation: opercular bone shape and stable isotopes in antarctic icefishes |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1002/ece3.708 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.708 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.708 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Ecology and Evolution volume 3, issue 9, page 3166-3182 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.1002/ece3.708 |
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Ecology and Evolution |
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3 |
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9 |
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3166 |
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3182 |
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1800739423559614464 |