Population genetic structure of Cnesterodon decemmaculatus (Poeciliidae): A freshwater look at the Pampa Biome in southern South America
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/221505 |
Resumo: | The Pampas is a Neotropical biome formed primarily by low altitude grasslands and encompasses the southernmost portion of Brazil, Uruguay, and part of Argentina. Despite the high level of endemism, and its significant environmental heterogeneity, Pampean species are underrepresented in phylogeographic studies, especially aquatic organisms. The Pampean hydrological system resulted from a long history of tectonism, climate, and sea level changes since the Neogene. In this study, we examined the population genetic structure of Cnesterodon decemmaculatus, a freshwater fish species that occurs throughout most of the Pampa biome. We characterized mitochondrial and autosomal genetic lineages in populations sampled from Southern Brazil and Uruguay to investigate (1) the correspondence between current drainage systems and evolutionary lineages, (2) the demographic history for each genetic lineage, and (3) the temporal depth of these lineages. Overall, we found that the major evolutionary lineages in this species are strongly related to the main Pampean drainage systems, even though stream capture events may have affected the distribution of genetic lineages among drainages. There was evidence for recent population growth in the lineages occupying drainages closest to the shore, which may indicate the effect of quaternary sea-level changes. In general, divergence time estimates among evolutionary lineages were shallow, ranging from 20,000 to 800,000 years before present, indicating a geologically recent history for this group, as previously reported in other Pampean species. A Bayesian phylogeographical reconstruction suggested that an ancestral lineage probably colonized the Uruguay River Basin, and then expanded throughout the Pampas. This evolutionary scenario may represent useful starting models for other freshwater species having a similar distribution. |
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Fregonezi, Aline Mitcheli Carvalho RamosMalabarba, Luiz RobertoFagundes, Nelson Jurandi Rosa2021-05-26T04:35:06Z20171664-8021http://hdl.handle.net/10183/221505001100894The Pampas is a Neotropical biome formed primarily by low altitude grasslands and encompasses the southernmost portion of Brazil, Uruguay, and part of Argentina. Despite the high level of endemism, and its significant environmental heterogeneity, Pampean species are underrepresented in phylogeographic studies, especially aquatic organisms. The Pampean hydrological system resulted from a long history of tectonism, climate, and sea level changes since the Neogene. In this study, we examined the population genetic structure of Cnesterodon decemmaculatus, a freshwater fish species that occurs throughout most of the Pampa biome. We characterized mitochondrial and autosomal genetic lineages in populations sampled from Southern Brazil and Uruguay to investigate (1) the correspondence between current drainage systems and evolutionary lineages, (2) the demographic history for each genetic lineage, and (3) the temporal depth of these lineages. Overall, we found that the major evolutionary lineages in this species are strongly related to the main Pampean drainage systems, even though stream capture events may have affected the distribution of genetic lineages among drainages. There was evidence for recent population growth in the lineages occupying drainages closest to the shore, which may indicate the effect of quaternary sea-level changes. In general, divergence time estimates among evolutionary lineages were shallow, ranging from 20,000 to 800,000 years before present, indicating a geologically recent history for this group, as previously reported in other Pampean species. A Bayesian phylogeographical reconstruction suggested that an ancestral lineage probably colonized the Uruguay River Basin, and then expanded throughout the Pampas. This evolutionary scenario may represent useful starting models for other freshwater species having a similar distribution.application/pdfengFrontiers in Genetics. Lausanne. Vol. 8 (Dec. 2017), art. 214, p. 1-10Cnesterodon decemmaculatusIctiologiaGenética animalBioma PampaFilogeografiaDNA mitocondrialBayesian PhylogeographyPopulation genetic structure of Cnesterodon decemmaculatus (Poeciliidae): A freshwater look at the Pampa Biome in southern South AmericaEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001100894.pdf.txt001100894.pdf.txtExtracted Texttext/plain51283http://www.lume.ufrgs.br/bitstream/10183/221505/2/001100894.pdf.txt68f77d32033086b8d84b76de14c91436MD52ORIGINAL001100894.pdfTexto completo (inglês)application/pdf3600323http://www.lume.ufrgs.br/bitstream/10183/221505/1/001100894.pdf006e1a9ca1c28ac3d5940bb09f2c0ce5MD5110183/2215052022-07-06 04:58:07.790416oai:www.lume.ufrgs.br:10183/221505Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2022-07-06T07:58:07Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Population genetic structure of Cnesterodon decemmaculatus (Poeciliidae): A freshwater look at the Pampa Biome in southern South America |
title |
Population genetic structure of Cnesterodon decemmaculatus (Poeciliidae): A freshwater look at the Pampa Biome in southern South America |
spellingShingle |
Population genetic structure of Cnesterodon decemmaculatus (Poeciliidae): A freshwater look at the Pampa Biome in southern South America Fregonezi, Aline Mitcheli Carvalho Ramos Cnesterodon decemmaculatus Ictiologia Genética animal Bioma Pampa Filogeografia DNA mitocondrial Bayesian Phylogeography |
title_short |
Population genetic structure of Cnesterodon decemmaculatus (Poeciliidae): A freshwater look at the Pampa Biome in southern South America |
title_full |
Population genetic structure of Cnesterodon decemmaculatus (Poeciliidae): A freshwater look at the Pampa Biome in southern South America |
title_fullStr |
Population genetic structure of Cnesterodon decemmaculatus (Poeciliidae): A freshwater look at the Pampa Biome in southern South America |
title_full_unstemmed |
Population genetic structure of Cnesterodon decemmaculatus (Poeciliidae): A freshwater look at the Pampa Biome in southern South America |
title_sort |
Population genetic structure of Cnesterodon decemmaculatus (Poeciliidae): A freshwater look at the Pampa Biome in southern South America |
author |
Fregonezi, Aline Mitcheli Carvalho Ramos |
author_facet |
Fregonezi, Aline Mitcheli Carvalho Ramos Malabarba, Luiz Roberto Fagundes, Nelson Jurandi Rosa |
author_role |
author |
author2 |
Malabarba, Luiz Roberto Fagundes, Nelson Jurandi Rosa |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Fregonezi, Aline Mitcheli Carvalho Ramos Malabarba, Luiz Roberto Fagundes, Nelson Jurandi Rosa |
dc.subject.por.fl_str_mv |
Cnesterodon decemmaculatus Ictiologia Genética animal Bioma Pampa Filogeografia DNA mitocondrial |
topic |
Cnesterodon decemmaculatus Ictiologia Genética animal Bioma Pampa Filogeografia DNA mitocondrial Bayesian Phylogeography |
dc.subject.eng.fl_str_mv |
Bayesian Phylogeography |
description |
The Pampas is a Neotropical biome formed primarily by low altitude grasslands and encompasses the southernmost portion of Brazil, Uruguay, and part of Argentina. Despite the high level of endemism, and its significant environmental heterogeneity, Pampean species are underrepresented in phylogeographic studies, especially aquatic organisms. The Pampean hydrological system resulted from a long history of tectonism, climate, and sea level changes since the Neogene. In this study, we examined the population genetic structure of Cnesterodon decemmaculatus, a freshwater fish species that occurs throughout most of the Pampa biome. We characterized mitochondrial and autosomal genetic lineages in populations sampled from Southern Brazil and Uruguay to investigate (1) the correspondence between current drainage systems and evolutionary lineages, (2) the demographic history for each genetic lineage, and (3) the temporal depth of these lineages. Overall, we found that the major evolutionary lineages in this species are strongly related to the main Pampean drainage systems, even though stream capture events may have affected the distribution of genetic lineages among drainages. There was evidence for recent population growth in the lineages occupying drainages closest to the shore, which may indicate the effect of quaternary sea-level changes. In general, divergence time estimates among evolutionary lineages were shallow, ranging from 20,000 to 800,000 years before present, indicating a geologically recent history for this group, as previously reported in other Pampean species. A Bayesian phylogeographical reconstruction suggested that an ancestral lineage probably colonized the Uruguay River Basin, and then expanded throughout the Pampas. This evolutionary scenario may represent useful starting models for other freshwater species having a similar distribution. |
publishDate |
2017 |
dc.date.issued.fl_str_mv |
2017 |
dc.date.accessioned.fl_str_mv |
2021-05-26T04:35:06Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
format |
article |
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publishedVersion |
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http://hdl.handle.net/10183/221505 |
dc.identifier.issn.pt_BR.fl_str_mv |
1664-8021 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001100894 |
identifier_str_mv |
1664-8021 001100894 |
url |
http://hdl.handle.net/10183/221505 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Frontiers in Genetics. Lausanne. Vol. 8 (Dec. 2017), art. 214, p. 1-10 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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