Cargando…

Hidden endemism, deep polyphyly, and repeated dispersal across the Isthmus of Tehuantepec: Diversification of the White‐collared Seedeater complex (Thraupidae: Sporophila torqueola)

Phenotypic and genetic variation are present in all species, but lineages differ in how variation is partitioned among populations. Examining phenotypic clustering and genetic structure within a phylogeographic framework can clarify which biological processes have contributed to extant biodiversity...

Descripción completa

Detalles Bibliográficos
Autores principales: Mason, Nicholas A., Olvera‐Vital, Arturo, Lovette, Irby J., Navarro‐Sigüenza, Adolfo G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5792519/
https://www.ncbi.nlm.nih.gov/pubmed/29435260
http://dx.doi.org/10.1002/ece3.3799
_version_ 1783296753779343360
author Mason, Nicholas A.
Olvera‐Vital, Arturo
Lovette, Irby J.
Navarro‐Sigüenza, Adolfo G.
author_facet Mason, Nicholas A.
Olvera‐Vital, Arturo
Lovette, Irby J.
Navarro‐Sigüenza, Adolfo G.
author_sort Mason, Nicholas A.
collection PubMed
description Phenotypic and genetic variation are present in all species, but lineages differ in how variation is partitioned among populations. Examining phenotypic clustering and genetic structure within a phylogeographic framework can clarify which biological processes have contributed to extant biodiversity in a given lineage. Here, we investigate genetic and phenotypic variation among populations and subspecies within a Neotropical songbird complex, the White‐collared Seedeater (Sporophila torqueola) of Central America and Mexico. We combine measurements of morphology and plumage patterning with thousands of nuclear loci derived from ultraconserved elements (UCEs) and mitochondrial DNA to evaluate population differentiation. We find deep levels of molecular divergence between two S. torqueola lineages that are phenotypically diagnosable: One corresponds to S. t. torqueola along the Pacific coast of Mexico, and the other includes S. t. morelleti and S. t. sharpei from the Gulf Coast of Mexico and Central America. Surprisingly, these two lineages are strongly differentiated in both nuclear and mitochondrial markers, and each is more closely related to other Sporophila species than to one another. We infer low levels of gene flow between these two groups based on demographic models, suggesting multiple independent evolutionary lineages within S. torqueola have been obscured by coarse‐scale similarity in plumage patterning. These findings improve our understanding of the biogeographic history of this lineage, which includes multiple dispersal events out of South America and across the Isthmus of Tehuantepec into Mesoamerica. Finally, the phenotypic and genetic distinctiveness of the range‐restricted S. t. torqueola highlights the Pacific Coast of Mexico as an important region of endemism and conservation priority.
format Online
Article
Text
id pubmed-5792519
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher John Wiley and Sons Inc.
record_format MEDLINE/PubMed
spelling pubmed-57925192018-02-12 Hidden endemism, deep polyphyly, and repeated dispersal across the Isthmus of Tehuantepec: Diversification of the White‐collared Seedeater complex (Thraupidae: Sporophila torqueola) Mason, Nicholas A. Olvera‐Vital, Arturo Lovette, Irby J. Navarro‐Sigüenza, Adolfo G. Ecol Evol Original Research Phenotypic and genetic variation are present in all species, but lineages differ in how variation is partitioned among populations. Examining phenotypic clustering and genetic structure within a phylogeographic framework can clarify which biological processes have contributed to extant biodiversity in a given lineage. Here, we investigate genetic and phenotypic variation among populations and subspecies within a Neotropical songbird complex, the White‐collared Seedeater (Sporophila torqueola) of Central America and Mexico. We combine measurements of morphology and plumage patterning with thousands of nuclear loci derived from ultraconserved elements (UCEs) and mitochondrial DNA to evaluate population differentiation. We find deep levels of molecular divergence between two S. torqueola lineages that are phenotypically diagnosable: One corresponds to S. t. torqueola along the Pacific coast of Mexico, and the other includes S. t. morelleti and S. t. sharpei from the Gulf Coast of Mexico and Central America. Surprisingly, these two lineages are strongly differentiated in both nuclear and mitochondrial markers, and each is more closely related to other Sporophila species than to one another. We infer low levels of gene flow between these two groups based on demographic models, suggesting multiple independent evolutionary lineages within S. torqueola have been obscured by coarse‐scale similarity in plumage patterning. These findings improve our understanding of the biogeographic history of this lineage, which includes multiple dispersal events out of South America and across the Isthmus of Tehuantepec into Mesoamerica. Finally, the phenotypic and genetic distinctiveness of the range‐restricted S. t. torqueola highlights the Pacific Coast of Mexico as an important region of endemism and conservation priority. John Wiley and Sons Inc. 2018-01-12 /pmc/articles/PMC5792519/ /pubmed/29435260 http://dx.doi.org/10.1002/ece3.3799 Text en © 2018 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Mason, Nicholas A.
Olvera‐Vital, Arturo
Lovette, Irby J.
Navarro‐Sigüenza, Adolfo G.
Hidden endemism, deep polyphyly, and repeated dispersal across the Isthmus of Tehuantepec: Diversification of the White‐collared Seedeater complex (Thraupidae: Sporophila torqueola)
title Hidden endemism, deep polyphyly, and repeated dispersal across the Isthmus of Tehuantepec: Diversification of the White‐collared Seedeater complex (Thraupidae: Sporophila torqueola)
title_full Hidden endemism, deep polyphyly, and repeated dispersal across the Isthmus of Tehuantepec: Diversification of the White‐collared Seedeater complex (Thraupidae: Sporophila torqueola)
title_fullStr Hidden endemism, deep polyphyly, and repeated dispersal across the Isthmus of Tehuantepec: Diversification of the White‐collared Seedeater complex (Thraupidae: Sporophila torqueola)
title_full_unstemmed Hidden endemism, deep polyphyly, and repeated dispersal across the Isthmus of Tehuantepec: Diversification of the White‐collared Seedeater complex (Thraupidae: Sporophila torqueola)
title_short Hidden endemism, deep polyphyly, and repeated dispersal across the Isthmus of Tehuantepec: Diversification of the White‐collared Seedeater complex (Thraupidae: Sporophila torqueola)
title_sort hidden endemism, deep polyphyly, and repeated dispersal across the isthmus of tehuantepec: diversification of the white‐collared seedeater complex (thraupidae: sporophila torqueola)
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5792519/
https://www.ncbi.nlm.nih.gov/pubmed/29435260
http://dx.doi.org/10.1002/ece3.3799
work_keys_str_mv AT masonnicholasa hiddenendemismdeeppolyphylyandrepeateddispersalacrosstheisthmusoftehuantepecdiversificationofthewhitecollaredseedeatercomplexthraupidaesporophilatorqueola
AT olveravitalarturo hiddenendemismdeeppolyphylyandrepeateddispersalacrosstheisthmusoftehuantepecdiversificationofthewhitecollaredseedeatercomplexthraupidaesporophilatorqueola
AT lovetteirbyj hiddenendemismdeeppolyphylyandrepeateddispersalacrosstheisthmusoftehuantepecdiversificationofthewhitecollaredseedeatercomplexthraupidaesporophilatorqueola
AT navarrosiguenzaadolfog hiddenendemismdeeppolyphylyandrepeateddispersalacrosstheisthmusoftehuantepecdiversificationofthewhitecollaredseedeatercomplexthraupidaesporophilatorqueola