Locomotory mode transitions alter phenotypic evolution and lineage diversification in an ecologically rich clade of mammals.

Autor: Nations JA; Museum of Natural Science, Louisiana State University, 119 Foster Hall, Baton Rouge, Louisiana, 70803.; Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, 70803., Mount GG; Museum of Natural Science, Louisiana State University, 119 Foster Hall, Baton Rouge, Louisiana, 70803.; Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, 70803., Morere SM; Museum of Natural Science, Louisiana State University, 119 Foster Hall, Baton Rouge, Louisiana, 70803., Achmadi AS; Museum Zoologicum Bogoriense, Research Centre for Biology, Cibinong, Jawa Barat, 16911, Indonesia., Rowe KC; Sciences Department, Museums Victoria, Melbourne, Victoria, 3001, Australia., Esselstyn JA; Museum of Natural Science, Louisiana State University, 119 Foster Hall, Baton Rouge, Louisiana, 70803.; Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, 70803.
Jazyk: angličtina
Zdroj: Evolution; international journal of organic evolution [Evolution] 2021 Feb; Vol. 75 (2), pp. 376-393. Date of Electronic Publication: 2021 Jan 03.
DOI: 10.1111/evo.14156
Abstrakt: The relationship between organismal function and form is a cornerstone of biology because functional diversity is key to generating and maintaining ecological diversity. Morphological changes often occur in unison with behavioral or ecological transitions, and this process may foster diversification, but alternately could trap a species on an adaptive peak. We estimated the most comprehensive phylogenetic hypothesis of Murinae, a young (∼15 million years) and diverse (∼700 species) clade of mammals. We then tested for correlated evolution among four morphological traits with potential links to locomotor modes (Arboreal, General, Terrestrial, and Amphibious), then investigated the effects of locomotion on morphological and lineage diversification. We found unique combinations of trait values for each locomotor mode, including strong covariance between the tail and hindfoot lengths of specialized Arboreal and ecologically flexible General species. Low diversification rates and long branch lengths suggest that specialized lineages represent stable evolutionary "cul-de-sacs." General species, characterized by the classic "rat-like" body plan and broad locomotor abilities, have narrow optimal trait values and slow phenotypic evolution, but high lineage diversification rates. Our findings suggest that versatile, generalist forms act as seeds of species diversity and morphological specialization, which together build ecologically diverse radiations.
(© 2020 The Authors. Evolution © 2020 The Society for the Study of Evolution.)
Databáze: MEDLINE
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