Data from: Evolutionary processes and its environmental correlates in the cranial morphology of western chipmunks (Tamias)
Assis, Ana Paula Aprígio, University of Sao Paulo
Rossoni, Daniela Munhoz, University of Sao Paulo
Patton, James L., University of Sao Paulo
Marroig, Gabriel, University of Sao Paulo
Published Nov 07, 2016 on Dryad.
Cite this dataset
Assis, Ana Paula Aprígio; Rossoni, Daniela Munhoz; Patton, James L.; Marroig, Gabriel (2016). Data from: Evolutionary processes and its environmental correlates in the cranial morphology of western chipmunks (Tamias) [Dataset]. Dryad. https://doi.org/10.5061/dryad.3583j
The importance of the environment in shaping phenotypic evolution lies at the core of evolutionary biology. Chipmunks of the genus Tamias (subgenus Neotamias) are part of a very recent radiation, occupying a wide range of environments with marked niche partitioning among species. One open question is if and how those differences in environments affected phenotypic evolution in this lineage. Herein we examine the relative importance of genetic drift versus natural selection in the origin of cranial diversity exhibited by clade members. We also explore the degree to which variation in potential selective agents (environmental variables) are correlated with the patterns of morphological variation presented. We found that genetic drift cannot explain morphological diversification in the group, thus supporting the potential role of natural selection as the predominant evolutionary force during Neotamias cranial diversification, although the strength of selection varied greatly among species. This morphological diversification, in turn, was correlated with environmental conditions, suggesting a possible causal relationship. These results underscore that extant Neotamias represent a radiation in which aspects of the environment might have acted as the selective force driving species’ divergence.
Data from the chipmunk skull's measured
In this file you can find the covariance matrices estimated for each chipmunk species and also the morphological and climatic estimates used in the study. The readMe file describes all the specimens used, and the respective museum where the data is deposited.