Demographic processes, refugia and dispersal routes within the sigmodontine rodent assemblage from South American Pampas during the Pleistocene
- Autores
- Ortiz, Natalia; Pinotti, Juan Diego; Trimarchi, Laura Inés; Gardenal, Cristina Noemi; González Ittig, Raúl Enrique; Rivera, Paula Cecilia
- Año de publicación
- 2021
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- The geographical distribution of a taxon is the result of the interaction among geological, environmental and ecological processes in a space-time dimension. Theoretically, co-distributed species should have congruent phylogeographic patterns as a result of being subject to common environmental and geological changes. However, these patterns may be a_ected by ecological di_erences among the species, such as dispersal abilities and food or habitat preferences, and by the possible instability of the assemblage itself through time. South America presents one of the most extended subtropical-temperate grasslands in the world, the Pampas. In the Pleistocene, this biome would have experienced expansions over forest areas during cold and generally dry (glacial) periods and retractions during warm and generally humid (interglacial) climates. The sigmodontine rodents inhabiting the Pampas are one of the best known rodent assemblages in South America, being a good study model to analyze the impact of the Pleistocene climate changes in the evolutionary history of the region through comparative phylogeography. We studied the phylogeographic patterns of seven rodent species inhabiting the Pampas; our aims were to evaluate the concordance of phylogeographic patterns among them, assess if they experienced congruent demographic changes, estimate the time in which this demographic change occurred, and infer if the dispersal routes are shared among them. Four of the seven species evidenced recent demographic expansion. However, no temporal synchrony was observed since Oligoryzomys nigripes and Oxymycterus nasutus experienced a population increase about 250,000 years ago, whereas for Calomys musculinus and Oligoryzomys avescens it was about 125,000-100,000 years ago. We observed three common centers of origin for the species populations, which would have acted as grassland refugia where species would have developed isolated lineages. The reconstruction of lineage dispersal showed common dispersion routes for all of the species, following the grassland expansion to North, West and South. Our results support the idea that recent glacial cycles had a more moderate impact in South America because of its latitude and continentality, and that open biomes such as grasslands would have been more stable in comparison with tropical forests. In this context, ecological di_erences could have gained a greater prominence, producing a more complex scenario, like the one observed in the present study.
Fil: Ortiz, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina
Fil: Pinotti, Juan Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina
Fil: Trimarchi, Laura Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina
Fil: Gardenal, Cristina Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina
Fil: González Ittig, Raúl Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina
Fil: Rivera, Paula Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina
II Virtual Meeting of Systematics, Biogeography, and Evolution: The Research of Biodiversity and the Diversity of Researchers
Estados Unidos
SBE Meeting 2021's Organizing Committee - Materia
-
COMPARATIVE PHYLOGEOGRAPHY
SIGMODONTINE RODENTS
PLEISTOCENE REFUGIA - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/248432
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Demographic processes, refugia and dispersal routes within the sigmodontine rodent assemblage from South American Pampas during the PleistoceneOrtiz, NataliaPinotti, Juan DiegoTrimarchi, Laura InésGardenal, Cristina NoemiGonzález Ittig, Raúl EnriqueRivera, Paula CeciliaCOMPARATIVE PHYLOGEOGRAPHYSIGMODONTINE RODENTSPLEISTOCENE REFUGIAhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The geographical distribution of a taxon is the result of the interaction among geological, environmental and ecological processes in a space-time dimension. Theoretically, co-distributed species should have congruent phylogeographic patterns as a result of being subject to common environmental and geological changes. However, these patterns may be a_ected by ecological di_erences among the species, such as dispersal abilities and food or habitat preferences, and by the possible instability of the assemblage itself through time. South America presents one of the most extended subtropical-temperate grasslands in the world, the Pampas. In the Pleistocene, this biome would have experienced expansions over forest areas during cold and generally dry (glacial) periods and retractions during warm and generally humid (interglacial) climates. The sigmodontine rodents inhabiting the Pampas are one of the best known rodent assemblages in South America, being a good study model to analyze the impact of the Pleistocene climate changes in the evolutionary history of the region through comparative phylogeography. We studied the phylogeographic patterns of seven rodent species inhabiting the Pampas; our aims were to evaluate the concordance of phylogeographic patterns among them, assess if they experienced congruent demographic changes, estimate the time in which this demographic change occurred, and infer if the dispersal routes are shared among them. Four of the seven species evidenced recent demographic expansion. However, no temporal synchrony was observed since Oligoryzomys nigripes and Oxymycterus nasutus experienced a population increase about 250,000 years ago, whereas for Calomys musculinus and Oligoryzomys avescens it was about 125,000-100,000 years ago. We observed three common centers of origin for the species populations, which would have acted as grassland refugia where species would have developed isolated lineages. The reconstruction of lineage dispersal showed common dispersion routes for all of the species, following the grassland expansion to North, West and South. Our results support the idea that recent glacial cycles had a more moderate impact in South America because of its latitude and continentality, and that open biomes such as grasslands would have been more stable in comparison with tropical forests. In this context, ecological di_erences could have gained a greater prominence, producing a more complex scenario, like the one observed in the present study.Fil: Ortiz, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; ArgentinaFil: Pinotti, Juan Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; ArgentinaFil: Trimarchi, Laura Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; ArgentinaFil: Gardenal, Cristina Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; ArgentinaFil: González Ittig, Raúl Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; ArgentinaFil: Rivera, Paula Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; ArgentinaII Virtual Meeting of Systematics, Biogeography, and Evolution: The Research of Biodiversity and the Diversity of ResearchersEstados UnidosSBE Meeting 2021's Organizing CommitteeSystematics, Biogeography, and Evolution meeting 2021's organizing committe2021info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/248432Demographic processes, refugia and dispersal routes within the sigmodontine rodent assemblage from South American Pampas during the Pleistocene; II Virtual Meeting of Systematics, Biogeography, and Evolution: The Research of Biodiversity and the Diversity of Researchers; Estados Unidos; 2021; 78-78CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://denisjacobmachado.wixsite.com/sbe21Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:29:24Zoai:ri.conicet.gov.ar:11336/248432instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:29:25.085CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Demographic processes, refugia and dispersal routes within the sigmodontine rodent assemblage from South American Pampas during the Pleistocene |
title |
Demographic processes, refugia and dispersal routes within the sigmodontine rodent assemblage from South American Pampas during the Pleistocene |
spellingShingle |
Demographic processes, refugia and dispersal routes within the sigmodontine rodent assemblage from South American Pampas during the Pleistocene Ortiz, Natalia COMPARATIVE PHYLOGEOGRAPHY SIGMODONTINE RODENTS PLEISTOCENE REFUGIA |
title_short |
Demographic processes, refugia and dispersal routes within the sigmodontine rodent assemblage from South American Pampas during the Pleistocene |
title_full |
Demographic processes, refugia and dispersal routes within the sigmodontine rodent assemblage from South American Pampas during the Pleistocene |
title_fullStr |
Demographic processes, refugia and dispersal routes within the sigmodontine rodent assemblage from South American Pampas during the Pleistocene |
title_full_unstemmed |
Demographic processes, refugia and dispersal routes within the sigmodontine rodent assemblage from South American Pampas during the Pleistocene |
title_sort |
Demographic processes, refugia and dispersal routes within the sigmodontine rodent assemblage from South American Pampas during the Pleistocene |
dc.creator.none.fl_str_mv |
Ortiz, Natalia Pinotti, Juan Diego Trimarchi, Laura Inés Gardenal, Cristina Noemi González Ittig, Raúl Enrique Rivera, Paula Cecilia |
author |
Ortiz, Natalia |
author_facet |
Ortiz, Natalia Pinotti, Juan Diego Trimarchi, Laura Inés Gardenal, Cristina Noemi González Ittig, Raúl Enrique Rivera, Paula Cecilia |
author_role |
author |
author2 |
Pinotti, Juan Diego Trimarchi, Laura Inés Gardenal, Cristina Noemi González Ittig, Raúl Enrique Rivera, Paula Cecilia |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
COMPARATIVE PHYLOGEOGRAPHY SIGMODONTINE RODENTS PLEISTOCENE REFUGIA |
topic |
COMPARATIVE PHYLOGEOGRAPHY SIGMODONTINE RODENTS PLEISTOCENE REFUGIA |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The geographical distribution of a taxon is the result of the interaction among geological, environmental and ecological processes in a space-time dimension. Theoretically, co-distributed species should have congruent phylogeographic patterns as a result of being subject to common environmental and geological changes. However, these patterns may be a_ected by ecological di_erences among the species, such as dispersal abilities and food or habitat preferences, and by the possible instability of the assemblage itself through time. South America presents one of the most extended subtropical-temperate grasslands in the world, the Pampas. In the Pleistocene, this biome would have experienced expansions over forest areas during cold and generally dry (glacial) periods and retractions during warm and generally humid (interglacial) climates. The sigmodontine rodents inhabiting the Pampas are one of the best known rodent assemblages in South America, being a good study model to analyze the impact of the Pleistocene climate changes in the evolutionary history of the region through comparative phylogeography. We studied the phylogeographic patterns of seven rodent species inhabiting the Pampas; our aims were to evaluate the concordance of phylogeographic patterns among them, assess if they experienced congruent demographic changes, estimate the time in which this demographic change occurred, and infer if the dispersal routes are shared among them. Four of the seven species evidenced recent demographic expansion. However, no temporal synchrony was observed since Oligoryzomys nigripes and Oxymycterus nasutus experienced a population increase about 250,000 years ago, whereas for Calomys musculinus and Oligoryzomys avescens it was about 125,000-100,000 years ago. We observed three common centers of origin for the species populations, which would have acted as grassland refugia where species would have developed isolated lineages. The reconstruction of lineage dispersal showed common dispersion routes for all of the species, following the grassland expansion to North, West and South. Our results support the idea that recent glacial cycles had a more moderate impact in South America because of its latitude and continentality, and that open biomes such as grasslands would have been more stable in comparison with tropical forests. In this context, ecological di_erences could have gained a greater prominence, producing a more complex scenario, like the one observed in the present study. Fil: Ortiz, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina Fil: Pinotti, Juan Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina Fil: Trimarchi, Laura Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina Fil: Gardenal, Cristina Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina Fil: González Ittig, Raúl Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina Fil: Rivera, Paula Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina II Virtual Meeting of Systematics, Biogeography, and Evolution: The Research of Biodiversity and the Diversity of Researchers Estados Unidos SBE Meeting 2021's Organizing Committee |
description |
The geographical distribution of a taxon is the result of the interaction among geological, environmental and ecological processes in a space-time dimension. Theoretically, co-distributed species should have congruent phylogeographic patterns as a result of being subject to common environmental and geological changes. However, these patterns may be a_ected by ecological di_erences among the species, such as dispersal abilities and food or habitat preferences, and by the possible instability of the assemblage itself through time. South America presents one of the most extended subtropical-temperate grasslands in the world, the Pampas. In the Pleistocene, this biome would have experienced expansions over forest areas during cold and generally dry (glacial) periods and retractions during warm and generally humid (interglacial) climates. The sigmodontine rodents inhabiting the Pampas are one of the best known rodent assemblages in South America, being a good study model to analyze the impact of the Pleistocene climate changes in the evolutionary history of the region through comparative phylogeography. We studied the phylogeographic patterns of seven rodent species inhabiting the Pampas; our aims were to evaluate the concordance of phylogeographic patterns among them, assess if they experienced congruent demographic changes, estimate the time in which this demographic change occurred, and infer if the dispersal routes are shared among them. Four of the seven species evidenced recent demographic expansion. However, no temporal synchrony was observed since Oligoryzomys nigripes and Oxymycterus nasutus experienced a population increase about 250,000 years ago, whereas for Calomys musculinus and Oligoryzomys avescens it was about 125,000-100,000 years ago. We observed three common centers of origin for the species populations, which would have acted as grassland refugia where species would have developed isolated lineages. The reconstruction of lineage dispersal showed common dispersion routes for all of the species, following the grassland expansion to North, West and South. Our results support the idea that recent glacial cycles had a more moderate impact in South America because of its latitude and continentality, and that open biomes such as grasslands would have been more stable in comparison with tropical forests. In this context, ecological di_erences could have gained a greater prominence, producing a more complex scenario, like the one observed in the present study. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021 |
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http://hdl.handle.net/11336/248432 Demographic processes, refugia and dispersal routes within the sigmodontine rodent assemblage from South American Pampas during the Pleistocene; II Virtual Meeting of Systematics, Biogeography, and Evolution: The Research of Biodiversity and the Diversity of Researchers; Estados Unidos; 2021; 78-78 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/248432 |
identifier_str_mv |
Demographic processes, refugia and dispersal routes within the sigmodontine rodent assemblage from South American Pampas during the Pleistocene; II Virtual Meeting of Systematics, Biogeography, and Evolution: The Research of Biodiversity and the Diversity of Researchers; Estados Unidos; 2021; 78-78 CONICET Digital CONICET |
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eng |
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eng |
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Systematics, Biogeography, and Evolution meeting 2021's organizing committe |
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Systematics, Biogeography, and Evolution meeting 2021's organizing committe |
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