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Evolutionary processes and its environmental correlates in the cranial morphology of western chipmunks ( Tamias).

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Title: Evolutionary processes and its environmental correlates in the cranial morphology of western chipmunks ( Tamias).
Authors: Assis, Ana Paula A.1, Rossoni, Daniela M.1, Patton, James L.2, Marroig, Gabriel1
Source: Evolution. Mar2017, Vol. 71 Issue 3, p595-609. 15p.
Subjects: Chipmunks, Rodent evolution, Rodent morphology, Natural selection, Rodent phylogeny
Abstract: 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. [ABSTRACT FROM AUTHOR]
Copyright of Evolution is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Evolutionary processes and its environmental correlates in the cranial morphology of western chipmunks ( Tamias).
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  Data: <searchLink fieldCode="AR" term="%22Assis%2C+Ana+Paula+A%2E%22">Assis, Ana Paula A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Rossoni%2C+Daniela+M%2E%22">Rossoni, Daniela M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Patton%2C+James+L%2E%22">Patton, James L.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Marroig%2C+Gabriel%22">Marroig, Gabriel</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Evolution%22">Evolution</searchLink>. Mar2017, Vol. 71 Issue 3, p595-609. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Chipmunks%22">Chipmunks</searchLink><br /><searchLink fieldCode="DE" term="%22Rodent+evolution%22">Rodent evolution</searchLink><br /><searchLink fieldCode="DE" term="%22Rodent+morphology%22">Rodent morphology</searchLink><br /><searchLink fieldCode="DE" term="%22Natural+selection%22">Natural selection</searchLink><br /><searchLink fieldCode="DE" term="%22Rodent+phylogeny%22">Rodent phylogeny</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: 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. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Evolution is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/evo.13137
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Rodent evolution
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      – SubjectFull: Rodent morphology
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      – SubjectFull: Natural selection
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            NameFull: Rossoni, Daniela M.
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              Text: Mar2017
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