2024-03-28T22:45:21Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1491222022-11-23T13:04:52Zcom_10261_108com_10261_8com_10261_13col_10261_361col_10261_266
Phenotypic disparity in Iberian short-horned grasshoppers (Acrididae): the role of ecology and phylogeny
García-Navas, Vicente
Noguerales, Víctor
Cordero, Pedro J.
Ortego, Joaquín
Ministerio de Economía y Competitividad (España)
CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)
Ecomorphology
Geometric morphometrics
Phenotypic evolution
Morphostatic radiation
Orthoptera
Tempo and mode
[Background]: The combination of model-based comparative techniques, disparity analyses and ecomorphological correlations constitutes a powerful method to gain insight into the evolutionary mechanisms that shape morphological variation and speciation processes. In this study, we used a time-calibrated phylogeny of 70 Iberian species of short-horned grasshoppers (Acrididae) to test for patterns of morphological disparity in relation to their ecology and phylogenetic history. Specifically, we examined the role of substrate type and level of ecological specialization in driving different aspects of morphological evolution (locomotory traits, chemosensitive organs and cranial morphology) in this recent radiation.
[Results]: We found a bimodal distribution of locomotory attributes corresponding to the two main substrate type guilds (plant vs. ground); plant-perching species tend to exhibit larger wings and thicker femora than those that remain on the ground. This suggests that life form (i.e., substrate type) is an important driving force in the evolution of morphological traits in short-horned grasshoppers, irrespective of ancestry. Substrate type and ecological specialization had no significant influence on head shape, a trait that showed a strong phylogenetic conservatism. Finally, we also found a marginal significant association between the length of antennae and the level of ecological specialization, suggesting that the development of sensory organs may be favored in specialist species.
[Conclusions]: Our results provide evidence that even in taxonomic groups showing limited morphological and ecological disparity, natural selection seems to play a more important role than genetic drift in driving the speciation process. Overall, this study suggests that morphostatic radiations should not necessarily be considered as “non-adaptive” and that the speciation process can bind both adaptive divergence mechanisms and neutral speciation processes related with allopatric and/or reproductive isolation.
2017-05-05T06:10:03Z
2017-05-05T06:10:03Z
2017-05-04
2017-05-05T06:10:04Z
artículo
BMC Evolutionary Biology 17(1): 109 (2017)
1471-2148
http://hdl.handle.net/10261/149122
10.1186/s12862-017-0954-7
http://dx.doi.org/10.13039/501100003329
28472922
en
Publisher's version
http://dx.doi.org/10.1186/s12862-017-0954-7
Sí
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/RYC-2013-12501
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2014-54671-P
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FPDI-2013-16828
http://creativecommons.org/licenses/by/4.0/
openAccess
BioMed Central