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Article: Diversification and phylogeographic structure in widespread Azteca plant-ants from the northern Neotropics

TitleDiversification and phylogeographic structure in widespread Azteca plant-ants from the northern Neotropics
Authors
KeywordsAnt-Plant Mutualism
Cordia Alliodora
Gene Trees
Middle America
Phylogeography
Pleistocene Climate Changes
Seasonally Dry Tropical Forests
Issue Date2012
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/MEC
Citation
Molecular Ecology, 2012, v. 21 n. 14, p. 3576-3592 How to Cite?
AbstractThe Neotropical myrmecophytic tree Cordia alliodora hosts symbiotic Azteca ants in most of its widespread range. The taxonomy of the genus Azteca is notoriously difficult, which has frequently obscured species identity in ecological studies. We used sequence data from one mitochondrial and four nuclear loci to infer phylogenetic relationships, patterns of geographic distribution, and timing of diversification for 182 colonies of five C. alliodora-dwelling Azteca species from Mexico to Colombia. All morphological species were recovered as monophyletic, but we identified at least five distinct genetic lineages within the most abundant and specialized species, Azteca pittieri. Mitochondrial and nuclear data were concordant at the species level, but not within species. Divergence time analyses estimated that C. alliodora-dwelling Azteca shared a common ancestor approximately 10-22 million years ago, prior to the proposed arrival of the host tree in Middle America. Diversification in A. pittieri occurred in the Pleistocene and was not correlated with geographic distance, which suggests limited historical gene flow among geographically restricted populations. This contrasts with the previously reported lack of phylogeographic structure at this spatial scale in the host tree. Climatic niches, and particularly precipitation-related variables, did not overlap between the sites occupied by northern and southern lineages of A. pittieri. Together, these results suggest that restricted gene flow among ant populations may facilitate local adaptation to environmental heterogeneity. Differences in population structure between the ants and their host trees may profoundly affect the evolutionary dynamics of this widespread ant-plant mutualism. © 2012 Blackwell Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/169869
ISSN
2015 Impact Factor: 5.947
2015 SCImago Journal Rankings: 3.925
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorPringle, EGen_HK
dc.contributor.authorRamírez, SRen_HK
dc.contributor.authorBonebrake, TCen_HK
dc.contributor.authorGordon, DMen_HK
dc.contributor.authorDirzo, Ren_HK
dc.date.accessioned2012-10-25T04:57:11Z-
dc.date.available2012-10-25T04:57:11Z-
dc.date.issued2012en_HK
dc.identifier.citationMolecular Ecology, 2012, v. 21 n. 14, p. 3576-3592en_HK
dc.identifier.issn0962-1083en_HK
dc.identifier.urihttp://hdl.handle.net/10722/169869-
dc.description.abstractThe Neotropical myrmecophytic tree Cordia alliodora hosts symbiotic Azteca ants in most of its widespread range. The taxonomy of the genus Azteca is notoriously difficult, which has frequently obscured species identity in ecological studies. We used sequence data from one mitochondrial and four nuclear loci to infer phylogenetic relationships, patterns of geographic distribution, and timing of diversification for 182 colonies of five C. alliodora-dwelling Azteca species from Mexico to Colombia. All morphological species were recovered as monophyletic, but we identified at least five distinct genetic lineages within the most abundant and specialized species, Azteca pittieri. Mitochondrial and nuclear data were concordant at the species level, but not within species. Divergence time analyses estimated that C. alliodora-dwelling Azteca shared a common ancestor approximately 10-22 million years ago, prior to the proposed arrival of the host tree in Middle America. Diversification in A. pittieri occurred in the Pleistocene and was not correlated with geographic distance, which suggests limited historical gene flow among geographically restricted populations. This contrasts with the previously reported lack of phylogeographic structure at this spatial scale in the host tree. Climatic niches, and particularly precipitation-related variables, did not overlap between the sites occupied by northern and southern lineages of A. pittieri. Together, these results suggest that restricted gene flow among ant populations may facilitate local adaptation to environmental heterogeneity. Differences in population structure between the ants and their host trees may profoundly affect the evolutionary dynamics of this widespread ant-plant mutualism. © 2012 Blackwell Publishing Ltd.en_HK
dc.languageengen_US
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/MECen_HK
dc.relation.ispartofMolecular Ecologyen_HK
dc.subjectAnt-Plant Mutualismen_US
dc.subjectCordia Alliodoraen_US
dc.subjectGene Treesen_US
dc.subjectMiddle Americaen_US
dc.subjectPhylogeographyen_US
dc.subjectPleistocene Climate Changesen_US
dc.subjectSeasonally Dry Tropical Forestsen_US
dc.subject.meshAdaptation, Biological - geneticsen_HK
dc.subject.meshAnimalsen_HK
dc.subject.meshAnts - geneticsen_HK
dc.subject.meshBiological Evolutionen_HK
dc.subject.meshCell Nucleus - geneticsen_HK
dc.subject.meshCentral Americaen_HK
dc.subject.meshClimateen_HK
dc.subject.meshDNA, Mitochondrial - geneticsen_HK
dc.subject.meshGene Flowen_HK
dc.subject.meshGenetics, Populationen_HK
dc.subject.meshMolecular Sequence Dataen_HK
dc.subject.meshPhylogenyen_HK
dc.subject.meshPhylogeographyen_HK
dc.subject.meshSequence Analysis, DNAen_HK
dc.titleDiversification and phylogeographic structure in widespread Azteca plant-ants from the northern Neotropicsen_HK
dc.typeArticleen_HK
dc.identifier.emailBonebrake, TC: tbone@hku.hken_HK
dc.identifier.authorityBonebrake, TC=rp01676en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1111/j.1365-294X.2012.05618.xen_HK
dc.identifier.pmid22646059-
dc.identifier.scopuseid_2-s2.0-84863725350en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84863725350&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume21en_HK
dc.identifier.issue14en_HK
dc.identifier.spage3576en_HK
dc.identifier.epage3592en_HK
dc.identifier.isiWOS:000306087100017-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridPringle, EG=22433404100en_HK
dc.identifier.scopusauthoridRamírez, SR=7102208390en_HK
dc.identifier.scopusauthoridBonebrake, TC=12798028100en_HK
dc.identifier.scopusauthoridGordon, DM=7403582360en_HK
dc.identifier.scopusauthoridDirzo, R=7003959015en_HK

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