The ecology of a continental evolutionary radiation: Is the radiation of sigmodontine rodents adaptive?
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| Title: | The ecology of a continental evolutionary radiation: Is the radiation of sigmodontine rodents adaptive? |
|---|---|
| Authors: | Maestri, Renan1,2, Monteiro, Leandro Rabello3, Fornel, Rodrigo4, Upham, Nathan S.2,5, Patterson, Bruce D.2, Freitas, Thales Renato Ochotorena1,6 |
| Source: | Evolution. Mar2017, Vol. 71 Issue 3, p610-632. 23p. |
| Subjects: | Rodent evolution, Rodent phylogeny, Rodent morphology, Rodent ecology, Rodent size |
| Abstract: | Evolutionary radiations on continents are less well-understood and appreciated than those occurring on islands. The extent of ecological influence on species divergence can be evaluated to determine whether a radiation was ultimately the outcome of divergent natural selection or else arose mainly by nonecological divergence. Here, we used phylogenetic comparative methods to test distinct hypotheses corresponding to adaptive and nonadaptive evolutionary scenarios for the morphological evolution of sigmodontine rodents. Results showed that ecological variables (diet and life-mode) explain little of the shape and size variation of sigmodontine skulls and mandibles. A Brownian model with varying rates for insectivory versus all other diets was the most likely evolutionary model. The insectivorous sigmodontines have a faster rate of morphological evolution than mice feeding on other diets, possibly due to stronger selection for features that aid insectivory. We also demonstrate that rapid early-lineage diversification is not accompanied by high morphological divergence among subclades, contrasting with island results. The geographic size of continents permits spatial segregation to a greater extent than on islands, allowing for allopatric distributions and escape from interspecific competition. We suggest that continental radiations of rodents are likely to produce a pattern of high species diversification coupled with a low degree of phenotypic specialization. [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.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 121625209 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: The ecology of a continental evolutionary radiation: Is the radiation of sigmodontine rodents adaptive? – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Maestri%2C+Renan%22">Maestri, Renan</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Monteiro%2C+Leandro+Rabello%22">Monteiro, Leandro Rabello</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Fornel%2C+Rodrigo%22">Fornel, Rodrigo</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Upham%2C+Nathan+S%2E%22">Upham, Nathan S.</searchLink><relatesTo>2,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Patterson%2C+Bruce+D%2E%22">Patterson, Bruce D.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Freitas%2C+Thales+Renato+Ochotorena%22">Freitas, Thales Renato Ochotorena</searchLink><relatesTo>1,6</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Evolution%22">Evolution</searchLink>. Mar2017, Vol. 71 Issue 3, p610-632. 23p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Rodent+evolution%22">Rodent evolution</searchLink><br /><searchLink fieldCode="DE" term="%22Rodent+phylogeny%22">Rodent phylogeny</searchLink><br /><searchLink fieldCode="DE" term="%22Rodent+morphology%22">Rodent morphology</searchLink><br /><searchLink fieldCode="DE" term="%22Rodent+ecology%22">Rodent ecology</searchLink><br /><searchLink fieldCode="DE" term="%22Rodent+size%22">Rodent size</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Evolutionary radiations on continents are less well-understood and appreciated than those occurring on islands. The extent of ecological influence on species divergence can be evaluated to determine whether a radiation was ultimately the outcome of divergent natural selection or else arose mainly by nonecological divergence. Here, we used phylogenetic comparative methods to test distinct hypotheses corresponding to adaptive and nonadaptive evolutionary scenarios for the morphological evolution of sigmodontine rodents. Results showed that ecological variables (diet and life-mode) explain little of the shape and size variation of sigmodontine skulls and mandibles. A Brownian model with varying rates for insectivory versus all other diets was the most likely evolutionary model. The insectivorous sigmodontines have a faster rate of morphological evolution than mice feeding on other diets, possibly due to stronger selection for features that aid insectivory. We also demonstrate that rapid early-lineage diversification is not accompanied by high morphological divergence among subclades, contrasting with island results. The geographic size of continents permits spatial segregation to a greater extent than on islands, allowing for allopatric distributions and escape from interspecific competition. We suggest that continental radiations of rodents are likely to produce a pattern of high species diversification coupled with a low degree of phenotypic specialization. [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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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1111/evo.13155 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 23 StartPage: 610 Subjects: – SubjectFull: Rodent evolution Type: general – SubjectFull: Rodent phylogeny Type: general – SubjectFull: Rodent morphology Type: general – SubjectFull: Rodent ecology Type: general – SubjectFull: Rodent size Type: general Titles: – TitleFull: The ecology of a continental evolutionary radiation: Is the radiation of sigmodontine rodents adaptive? Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Maestri, Renan – PersonEntity: Name: NameFull: Monteiro, Leandro Rabello – PersonEntity: Name: NameFull: Fornel, Rodrigo – PersonEntity: Name: NameFull: Upham, Nathan S. – PersonEntity: Name: NameFull: Patterson, Bruce D. – PersonEntity: Name: NameFull: Freitas, Thales Renato Ochotorena IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 00143820 Numbering: – Type: volume Value: 71 – Type: issue Value: 3 Titles: – TitleFull: Evolution Type: main |
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