Ecological and evolutionary factors in the morphological diversification of South American spiny rats

Understanding the processes underlying morphological diversification is a central goal in ecology and evolutionary biology and requires the integration of information about phylogenetic divergence and ecological niche diversity. In the present study, we use geometric morphometrics and comparative me...

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Autores principales:	Pérez, Sergio Iván, Diniz-Filho, José Alexandre Felizola, Rohlf, F. James, Dos Reis, Sérgio Furtado
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2009
Materias:	Antropología Adaptive radiation Comparative method Echimyid rodents Geometric morphometrics Natural selection Semilandmarks
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/82726
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-82726
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Antropología Adaptive radiation Comparative method Echimyid rodents Geometric morphometrics Natural selection Semilandmarks
spellingShingle	Antropología Adaptive radiation Comparative method Echimyid rodents Geometric morphometrics Natural selection Semilandmarks Pérez, Sergio Iván Diniz-Filho, José Alexandre Felizola Rohlf, F. James Dos Reis, Sérgio Furtado Ecological and evolutionary factors in the morphological diversification of South American spiny rats
topic_facet	Antropología Adaptive radiation Comparative method Echimyid rodents Geometric morphometrics Natural selection Semilandmarks
description	Understanding the processes underlying morphological diversification is a central goal in ecology and evolutionary biology and requires the integration of information about phylogenetic divergence and ecological niche diversity. In the present study, we use geometric morphometrics and comparative methods to investigate morphological diversification in Neotropical spiny rats of the family Echimyidae. Morphological diversification is studied as shape variation in the skull, comprising a structure composed of four distinct units: vault, base, orognathofacial complex, and mandible. We demonstrate association among patterns of variation in shape in different cranial units, levels of phylogenetic divergence, and ecological niche diversification. At the lower level of phylogenetic divergence, there is significant and positive concordance between patterns of phylogenetic divergence and cranial shape variation in all cranial units. This concordance may be attributable to the phylogenetic and shape distances being calculated between species that occupy the same niche. At higher phylogenetic levels of divergence and with ecological niche diversity, there is significant concordance between shape variation in all four cranial units and the ecological niches. In particular, the orognathofacial complex revealed the most significant association between shape variation and ecological niche diversity. This association may be explained by the great functional importance of the orognathofacial complex.
format	Articulo Articulo
author	Pérez, Sergio Iván Diniz-Filho, José Alexandre Felizola Rohlf, F. James Dos Reis, Sérgio Furtado
author_facet	Pérez, Sergio Iván Diniz-Filho, José Alexandre Felizola Rohlf, F. James Dos Reis, Sérgio Furtado
author_sort	Pérez, Sergio Iván
title	Ecological and evolutionary factors in the morphological diversification of South American spiny rats
title_short	Ecological and evolutionary factors in the morphological diversification of South American spiny rats
title_full	Ecological and evolutionary factors in the morphological diversification of South American spiny rats
title_fullStr	Ecological and evolutionary factors in the morphological diversification of South American spiny rats
title_full_unstemmed	Ecological and evolutionary factors in the morphological diversification of South American spiny rats
title_sort	ecological and evolutionary factors in the morphological diversification of south american spiny rats
publishDate	2009
url	http://sedici.unlp.edu.ar/handle/10915/82726
work_keys_str_mv	AT perezsergioivan ecologicalandevolutionaryfactorsinthemorphologicaldiversificationofsouthamericanspinyrats AT dinizfilhojosealexandrefelizola ecologicalandevolutionaryfactorsinthemorphologicaldiversificationofsouthamericanspinyrats AT rohlffjames ecologicalandevolutionaryfactorsinthemorphologicaldiversificationofsouthamericanspinyrats AT dosreissergiofurtado ecologicalandevolutionaryfactorsinthemorphologicaldiversificationofsouthamericanspinyrats
bdutipo_str	Repositorios
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Ecological and evolutionary factors in the morphological diversification of South American spiny rats

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