Cranial shape varies along an elevation gradient in Gambel's white-footed mouse (Peromyscus maniculatus gambelii) in the Grinnell Resurvey Yosemite transect

Journal of Morphology
T M Grieco, O T Rizk

Abstract

Environmental variation over a species's range creates differing pressures to which organisms must adjust in order to survive. Taxa can respond to these pressures at population and individual levels, leading to localized phenotypic differentiation. Assessing the spatial distribution of phenotypic variation can illuminate how dramatically varying environmental factors shape phenotypes and may forecast a taxon's ability to adapt should conditions change. We characterized morphological variation along a transect sampled in the Grinnell Resurvey project to determine whether Gambel's white-footed mouse (Peromyscus maniculatus gambelii), a generalist taxon inhabiting the full elevational range of habitats in Yosemite National Park and surrounding areas, has responded morphologically to variation in its environment. We quantified variation in modern P. m. gambelii cranial shape using 2D generalized Procrustes analysis and Euclidean distance matrix-based geometric morphometrics. We performed multivariate regression of shape coordinates on elevation to test for environmental influences on shape within the principal geographic dimension of change along the transect. We observe a statistically significant correlation with shape on elevati...Continue Reading

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Citations

Jun 18, 2015·ELife·Nicole L Bedford, Hopi E Hoekstra
Jan 7, 2016·Global Change Biology·Rachel E WalshEileen A Lacey
Jun 5, 2014·Wiley Interdisciplinary Reviews. Developmental Biology·Paul B VranaWallace D Dawson
Jan 8, 2013·Evolution; International Journal of Organic Evolution·Theresa M GriecoLeslea J Hlusko

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