A phylogenetic test for adaptive convergence in rock-dwelling lizards
Phenotypic similarity of species occupying similar habitats has long been taken as strong evidence of adaptation, but this approach implicitly assumes that similarity is evolutionarily derived. However, even derived similarities may not represent convergent adaptation if the similarities did not evo...
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| Lenguaje: | Inglés (English) |
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Society for the Study of Evolution
2007
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| Acceso en línea: | https://repository.urosario.edu.co/handle/10336/27708 https://doi.org/10.1111/j.1558-5646.2007.00225.x |
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ir-10336-277082022-05-02T12:37:13Z A phylogenetic test for adaptive convergence in rock-dwelling lizards Una prueba filogenética para la convergencia adaptativa en lagartos que habitan en las rocas Revell, Liam J. Johnson, Michele A. Schulte II, James A. Kolbe, Jason J. Losos, Jonathan B. Character evolution Comparative method Convergence Exaptation Parallelism Phenotypic similarity of species occupying similar habitats has long been taken as strong evidence of adaptation, but this approach implicitly assumes that similarity is evolutionarily derived. However, even derived similarities may not represent convergent adaptation if the similarities did not evolve as a result of the same selection pressures; an alternative possibility is that the similar features evolved for different reasons, but subsequently allowed the species to occupy the same habitat, in which case the convergent evolution of the same feature by species occupying similar habitats would be the result of exaptation. Many lizard lineages have evolved to occupy vertical rock surfaces, a habitat that places strong functional and ecological demands on lizards. We examined four clades in which species that use vertical rock surfaces exhibit long hindlimbs and flattened bodies. Morphological change on the phylogenetic branches leading to the rock?dwelling species in the four clades differed from change on other branches of the phylogeny; evolutionary transitions to rock?dwelling generally were associated with increases in limb length and decreases in head depth. Examination of particular characters revealed several different patterns of evolutionary change. Rock?dwelling lizards exhibited similarities in head depth as a result of both adaptation and exaptation. Moreover, even though rock?dwelling species generally had longer limbs than their close relatives, clade?level differences in limb length led to an overall lack of difference between rock? and non–rock?dwelling lizards. These results indicate that evolutionary change in the same direction in independent lineages does not necessarily produce convergence, and that the existence of similar advantageous structures among species independently occupying the same environment may not indicate adaptation. 2007-10-10 2020-08-19T14:43:27Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion ISSN: 0014-3820 EISSN: 1558-5646 https://repository.urosario.edu.co/handle/10336/27708 https://doi.org/10.1111/j.1558-5646.2007.00225.x eng info:eu-repo/semantics/openAccess application/pdf Society for the Study of Evolution instname:Universidad del Rosario |
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EdocUR - Universidad del Rosario |
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DSpace |
| language |
Inglés (English) |
| topic |
Character evolution Comparative method Convergence Exaptation Parallelism |
| spellingShingle |
Character evolution Comparative method Convergence Exaptation Parallelism Revell, Liam J. Johnson, Michele A. Schulte II, James A. Kolbe, Jason J. Losos, Jonathan B. A phylogenetic test for adaptive convergence in rock-dwelling lizards |
| description |
Phenotypic similarity of species occupying similar habitats has long been taken as strong evidence of adaptation, but this approach implicitly assumes that similarity is evolutionarily derived. However, even derived similarities may not represent convergent adaptation if the similarities did not evolve as a result of the same selection pressures; an alternative possibility is that the similar features evolved for different reasons, but subsequently allowed the species to occupy the same habitat, in which case the convergent evolution of the same feature by species occupying similar habitats would be the result of exaptation. Many lizard lineages have evolved to occupy vertical rock surfaces, a habitat that places strong functional and ecological demands on lizards. We examined four clades in which species that use vertical rock surfaces exhibit long hindlimbs and flattened bodies. Morphological change on the phylogenetic branches leading to the rock?dwelling species in the four clades differed from change on other branches of the phylogeny; evolutionary transitions to rock?dwelling generally were associated with increases in limb length and decreases in head depth. Examination of particular characters revealed several different patterns of evolutionary change. Rock?dwelling lizards exhibited similarities in head depth as a result of both adaptation and exaptation. Moreover, even though rock?dwelling species generally had longer limbs than their close relatives, clade?level differences in limb length led to an overall lack of difference between rock? and non–rock?dwelling lizards. These results indicate that evolutionary change in the same direction in independent lineages does not necessarily produce convergence, and that the existence of similar advantageous structures among species independently occupying the same environment may not indicate adaptation. |
| format |
Artículo (Article) |
| author |
Revell, Liam J. Johnson, Michele A. Schulte II, James A. Kolbe, Jason J. Losos, Jonathan B. |
| author_facet |
Revell, Liam J. Johnson, Michele A. Schulte II, James A. Kolbe, Jason J. Losos, Jonathan B. |
| author_sort |
Revell, Liam J. |
| title |
A phylogenetic test for adaptive convergence in rock-dwelling lizards |
| title_short |
A phylogenetic test for adaptive convergence in rock-dwelling lizards |
| title_full |
A phylogenetic test for adaptive convergence in rock-dwelling lizards |
| title_fullStr |
A phylogenetic test for adaptive convergence in rock-dwelling lizards |
| title_full_unstemmed |
A phylogenetic test for adaptive convergence in rock-dwelling lizards |
| title_sort |
phylogenetic test for adaptive convergence in rock-dwelling lizards |
| publisher |
Society for the Study of Evolution |
| publishDate |
2007 |
| url |
https://repository.urosario.edu.co/handle/10336/27708 https://doi.org/10.1111/j.1558-5646.2007.00225.x |
| _version_ |
1740172204517097472 |
| score |
12,131701 |