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Breaking out of biogeographical modules: range expansion and taxon cycles in the hyperdiverse ant genus Pheidole

AIM: We sought to reconstruct the biogeographical structure and dynamics of a hyperdiverse ant genus, Pheidole, and to test several predictions of the taxon cycle hypothesis. Using large datasets on Pheidole geographical distributions and phylogeny, we (1) inferred patterns of biogeographical modula...

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Autores principales: Economo, Evan P., Sarnat, Eli M., Janda, Milan, Clouse, Ronald, Klimov, Pavel B., Fischer, Georg, Blanchard, Benjamin D., Ramirez, Lizette N., Andersen, Alan N., Berman, Maia, Guénard, Benoit, Lucky, Andrea, Rabeling, Christian, Wilson, Edward O., Knowles, L. Lacey
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5014176/
https://www.ncbi.nlm.nih.gov/pubmed/27660394
http://dx.doi.org/10.1111/jbi.12592
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author Economo, Evan P.
Sarnat, Eli M.
Janda, Milan
Clouse, Ronald
Klimov, Pavel B.
Fischer, Georg
Blanchard, Benjamin D.
Ramirez, Lizette N.
Andersen, Alan N.
Berman, Maia
Guénard, Benoit
Lucky, Andrea
Rabeling, Christian
Wilson, Edward O.
Knowles, L. Lacey
author_facet Economo, Evan P.
Sarnat, Eli M.
Janda, Milan
Clouse, Ronald
Klimov, Pavel B.
Fischer, Georg
Blanchard, Benjamin D.
Ramirez, Lizette N.
Andersen, Alan N.
Berman, Maia
Guénard, Benoit
Lucky, Andrea
Rabeling, Christian
Wilson, Edward O.
Knowles, L. Lacey
author_sort Economo, Evan P.
collection PubMed
description AIM: We sought to reconstruct the biogeographical structure and dynamics of a hyperdiverse ant genus, Pheidole, and to test several predictions of the taxon cycle hypothesis. Using large datasets on Pheidole geographical distributions and phylogeny, we (1) inferred patterns of biogeographical modularity (clusters of areas with similar faunal composition), (2) tested whether species in open habitats are more likely to be expanding their range beyond module boundaries, and (3) tested whether there is a bias of lineage flow from high‐ to low‐diversity areas. LOCATION: The Old World. METHODS: We compiled and jointly analysed a comprehensive database of Pheidole geographical distributions, the ecological affinities of different species, and a multilocus phylogeny of the Old World radiation. We used network modularity methods to infer biogeographical structure in the genus and comparative methods to evaluate the hypotheses. RESULTS: The network analysis identified eight biogeographical modules, and a suite of species with anomalous ranges that are statistically more likely to occur in open habitat, supporting the hypothesis that open habitats promote range expansion. Phylogenetic analysis shows evidence for a cascade pattern of colonization from Asia to New Guinea to the Pacific, but no ‘upstream’ colonization in the reverse direction. MAIN CONCLUSIONS: The distributions of Pheidole lineages in the Old World are highly modular, with modules generally corresponding to biogeographical regions inferred in other groups of organisms. However, some lineages have expanded their ranges across module boundaries, and these species are more likely to be adapted to open habitats rather than interior forest. In addition, there is a cascade pattern of dispersal from higher to lower diversity areas during these range expansions. Our findings are consistent with the taxon cycle hypothesis, although they do not rule out alternative interpretations.
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spelling pubmed-50141762016-09-20 Breaking out of biogeographical modules: range expansion and taxon cycles in the hyperdiverse ant genus Pheidole Economo, Evan P. Sarnat, Eli M. Janda, Milan Clouse, Ronald Klimov, Pavel B. Fischer, Georg Blanchard, Benjamin D. Ramirez, Lizette N. Andersen, Alan N. Berman, Maia Guénard, Benoit Lucky, Andrea Rabeling, Christian Wilson, Edward O. Knowles, L. Lacey J Biogeogr All about Ants AIM: We sought to reconstruct the biogeographical structure and dynamics of a hyperdiverse ant genus, Pheidole, and to test several predictions of the taxon cycle hypothesis. Using large datasets on Pheidole geographical distributions and phylogeny, we (1) inferred patterns of biogeographical modularity (clusters of areas with similar faunal composition), (2) tested whether species in open habitats are more likely to be expanding their range beyond module boundaries, and (3) tested whether there is a bias of lineage flow from high‐ to low‐diversity areas. LOCATION: The Old World. METHODS: We compiled and jointly analysed a comprehensive database of Pheidole geographical distributions, the ecological affinities of different species, and a multilocus phylogeny of the Old World radiation. We used network modularity methods to infer biogeographical structure in the genus and comparative methods to evaluate the hypotheses. RESULTS: The network analysis identified eight biogeographical modules, and a suite of species with anomalous ranges that are statistically more likely to occur in open habitat, supporting the hypothesis that open habitats promote range expansion. Phylogenetic analysis shows evidence for a cascade pattern of colonization from Asia to New Guinea to the Pacific, but no ‘upstream’ colonization in the reverse direction. MAIN CONCLUSIONS: The distributions of Pheidole lineages in the Old World are highly modular, with modules generally corresponding to biogeographical regions inferred in other groups of organisms. However, some lineages have expanded their ranges across module boundaries, and these species are more likely to be adapted to open habitats rather than interior forest. In addition, there is a cascade pattern of dispersal from higher to lower diversity areas during these range expansions. Our findings are consistent with the taxon cycle hypothesis, although they do not rule out alternative interpretations. John Wiley and Sons Inc. 2015-09-01 2015-12 /pmc/articles/PMC5014176/ /pubmed/27660394 http://dx.doi.org/10.1111/jbi.12592 Text en © 2015 The Authors. Journal of Biogeography Published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution‐NoDerivs (http://creativecommons.org/licenses/by-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited and no modifications or adaptations are made.
spellingShingle All about Ants
Economo, Evan P.
Sarnat, Eli M.
Janda, Milan
Clouse, Ronald
Klimov, Pavel B.
Fischer, Georg
Blanchard, Benjamin D.
Ramirez, Lizette N.
Andersen, Alan N.
Berman, Maia
Guénard, Benoit
Lucky, Andrea
Rabeling, Christian
Wilson, Edward O.
Knowles, L. Lacey
Breaking out of biogeographical modules: range expansion and taxon cycles in the hyperdiverse ant genus Pheidole
title Breaking out of biogeographical modules: range expansion and taxon cycles in the hyperdiverse ant genus Pheidole
title_full Breaking out of biogeographical modules: range expansion and taxon cycles in the hyperdiverse ant genus Pheidole
title_fullStr Breaking out of biogeographical modules: range expansion and taxon cycles in the hyperdiverse ant genus Pheidole
title_full_unstemmed Breaking out of biogeographical modules: range expansion and taxon cycles in the hyperdiverse ant genus Pheidole
title_short Breaking out of biogeographical modules: range expansion and taxon cycles in the hyperdiverse ant genus Pheidole
title_sort breaking out of biogeographical modules: range expansion and taxon cycles in the hyperdiverse ant genus pheidole
topic All about Ants
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5014176/
https://www.ncbi.nlm.nih.gov/pubmed/27660394
http://dx.doi.org/10.1111/jbi.12592
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