Palaeoecological implications of the mid-Pliocene faunal turnover in the Pampean Region (Argentina)

Autores
Vizcaíno, Sergio Fabián; Fariña, Richard A.; Zárate, Marcelo Arístides; Bargo, María Susana; Schultz, Peter
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Known since Darwin's time, the Plio-Pleistocene succession exposed at the Chapadmalal sea cliffs have provided abundant mammal remains even though palaeobiological studies are scarce. Different authors have identified several assemblages in this stratigraphic interval of homogeneous lithology, which records an important mid-Pliocene faunal turnover dated at ca. 3.3 Ma. This paper examines the palaeoecological characteristics and the regional importance of this faunal turnover: 37% of all genera and 53% of all species became extinct between the older Chapadmalalan and the younger Barrancalobian chronostratigraphic units, a level that is actually higher than the percentage of genera extinct at the global-scaled Cretaceous - Tertiary extinction. The palaeoecological analysis permits to infer that the species-rich Chapadmalalan fauna seems to have been very balanced from the trophic - energetic point of view. On the other hand, the succeeding and less-explored Barrancalobian represents a relatively poorer environment, highly unbalanced in terms of the herbivore - carnivore relationships, due mainly to the absence of medium to large mammal and bird carnivores. The cause of the mid-Pliocene faunal turnover is still debatable. Climatic change has been traditionally related to this faunal turnover. Stratigraphically, an impact event dated at ca. 3.3 Ma is recorded in the succession. This event coincides with a change in the deep-sea stable isotopic record, reflecting a sudden change in climate and ocean circulation. This suggests that the impact might have induced regional faunal extinctions. Correlation with other areas different from the coast of Buenos Aires Province is needed to establish the geographic scale of the extinction. New fossils will provide a more complete and accurate picture of this remarkable faunal turnover.
Fil: Vizcaíno, Sergio Fabián. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Paleontología de Vertebrados; Argentina
Fil: Fariña, Richard A.. Universidad de la República; Uruguay
Fil: Zárate, Marcelo Arístides. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias de la Tierra y Ambientales de La Pampa. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Instituto de Ciencias de la Tierra y Ambientales de La Pampa; Argentina
Fil: Bargo, María Susana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Paleontología de Vertebrados; Argentina
Fil: Schultz, Peter. University Brown; Estados Unidos
Materia
Extinction
Mammals
Palaeoecology
South America
Stratigraphy
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
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oai:ri.conicet.gov.ar:11336/81756
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Palaeoecological implications of the mid-Pliocene faunal turnover in the Pampean Region (Argentina)Vizcaíno, Sergio FabiánFariña, Richard A.Zárate, Marcelo ArístidesBargo, María SusanaSchultz, PeterExtinctionMammalsPalaeoecologySouth AmericaStratigraphyhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Known since Darwin's time, the Plio-Pleistocene succession exposed at the Chapadmalal sea cliffs have provided abundant mammal remains even though palaeobiological studies are scarce. Different authors have identified several assemblages in this stratigraphic interval of homogeneous lithology, which records an important mid-Pliocene faunal turnover dated at ca. 3.3 Ma. This paper examines the palaeoecological characteristics and the regional importance of this faunal turnover: 37% of all genera and 53% of all species became extinct between the older Chapadmalalan and the younger Barrancalobian chronostratigraphic units, a level that is actually higher than the percentage of genera extinct at the global-scaled Cretaceous - Tertiary extinction. The palaeoecological analysis permits to infer that the species-rich Chapadmalalan fauna seems to have been very balanced from the trophic - energetic point of view. On the other hand, the succeeding and less-explored Barrancalobian represents a relatively poorer environment, highly unbalanced in terms of the herbivore - carnivore relationships, due mainly to the absence of medium to large mammal and bird carnivores. The cause of the mid-Pliocene faunal turnover is still debatable. Climatic change has been traditionally related to this faunal turnover. Stratigraphically, an impact event dated at ca. 3.3 Ma is recorded in the succession. This event coincides with a change in the deep-sea stable isotopic record, reflecting a sudden change in climate and ocean circulation. This suggests that the impact might have induced regional faunal extinctions. Correlation with other areas different from the coast of Buenos Aires Province is needed to establish the geographic scale of the extinction. New fossils will provide a more complete and accurate picture of this remarkable faunal turnover.Fil: Vizcaíno, Sergio Fabián. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Paleontología de Vertebrados; ArgentinaFil: Fariña, Richard A.. Universidad de la República; UruguayFil: Zárate, Marcelo Arístides. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias de la Tierra y Ambientales de La Pampa. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Instituto de Ciencias de la Tierra y Ambientales de La Pampa; ArgentinaFil: Bargo, María Susana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Paleontología de Vertebrados; ArgentinaFil: Schultz, Peter. University Brown; Estados UnidosElsevier Science2004-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/81756Vizcaíno, Sergio Fabián; Fariña, Richard A.; Zárate, Marcelo Arístides; Bargo, María Susana; Schultz, Peter; Palaeoecological implications of the mid-Pliocene faunal turnover in the Pampean Region (Argentina); Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 213; 1-2; 10-2004; 101-1130031-0182CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2004.07.004info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0031018204003657info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:40:18Zoai:ri.conicet.gov.ar:11336/81756instacron: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 10:40:18.575CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Palaeoecological implications of the mid-Pliocene faunal turnover in the Pampean Region (Argentina)
title Palaeoecological implications of the mid-Pliocene faunal turnover in the Pampean Region (Argentina)
spellingShingle Palaeoecological implications of the mid-Pliocene faunal turnover in the Pampean Region (Argentina)
Vizcaíno, Sergio Fabián
Extinction
Mammals
Palaeoecology
South America
Stratigraphy
title_short Palaeoecological implications of the mid-Pliocene faunal turnover in the Pampean Region (Argentina)
title_full Palaeoecological implications of the mid-Pliocene faunal turnover in the Pampean Region (Argentina)
title_fullStr Palaeoecological implications of the mid-Pliocene faunal turnover in the Pampean Region (Argentina)
title_full_unstemmed Palaeoecological implications of the mid-Pliocene faunal turnover in the Pampean Region (Argentina)
title_sort Palaeoecological implications of the mid-Pliocene faunal turnover in the Pampean Region (Argentina)
dc.creator.none.fl_str_mv Vizcaíno, Sergio Fabián
Fariña, Richard A.
Zárate, Marcelo Arístides
Bargo, María Susana
Schultz, Peter
author Vizcaíno, Sergio Fabián
author_facet Vizcaíno, Sergio Fabián
Fariña, Richard A.
Zárate, Marcelo Arístides
Bargo, María Susana
Schultz, Peter
author_role author
author2 Fariña, Richard A.
Zárate, Marcelo Arístides
Bargo, María Susana
Schultz, Peter
author2_role author
author
author
author
dc.subject.none.fl_str_mv Extinction
Mammals
Palaeoecology
South America
Stratigraphy
topic Extinction
Mammals
Palaeoecology
South America
Stratigraphy
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Known since Darwin's time, the Plio-Pleistocene succession exposed at the Chapadmalal sea cliffs have provided abundant mammal remains even though palaeobiological studies are scarce. Different authors have identified several assemblages in this stratigraphic interval of homogeneous lithology, which records an important mid-Pliocene faunal turnover dated at ca. 3.3 Ma. This paper examines the palaeoecological characteristics and the regional importance of this faunal turnover: 37% of all genera and 53% of all species became extinct between the older Chapadmalalan and the younger Barrancalobian chronostratigraphic units, a level that is actually higher than the percentage of genera extinct at the global-scaled Cretaceous - Tertiary extinction. The palaeoecological analysis permits to infer that the species-rich Chapadmalalan fauna seems to have been very balanced from the trophic - energetic point of view. On the other hand, the succeeding and less-explored Barrancalobian represents a relatively poorer environment, highly unbalanced in terms of the herbivore - carnivore relationships, due mainly to the absence of medium to large mammal and bird carnivores. The cause of the mid-Pliocene faunal turnover is still debatable. Climatic change has been traditionally related to this faunal turnover. Stratigraphically, an impact event dated at ca. 3.3 Ma is recorded in the succession. This event coincides with a change in the deep-sea stable isotopic record, reflecting a sudden change in climate and ocean circulation. This suggests that the impact might have induced regional faunal extinctions. Correlation with other areas different from the coast of Buenos Aires Province is needed to establish the geographic scale of the extinction. New fossils will provide a more complete and accurate picture of this remarkable faunal turnover.
Fil: Vizcaíno, Sergio Fabián. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Paleontología de Vertebrados; Argentina
Fil: Fariña, Richard A.. Universidad de la República; Uruguay
Fil: Zárate, Marcelo Arístides. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias de la Tierra y Ambientales de La Pampa. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Instituto de Ciencias de la Tierra y Ambientales de La Pampa; Argentina
Fil: Bargo, María Susana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Paleontología de Vertebrados; Argentina
Fil: Schultz, Peter. University Brown; Estados Unidos
description Known since Darwin's time, the Plio-Pleistocene succession exposed at the Chapadmalal sea cliffs have provided abundant mammal remains even though palaeobiological studies are scarce. Different authors have identified several assemblages in this stratigraphic interval of homogeneous lithology, which records an important mid-Pliocene faunal turnover dated at ca. 3.3 Ma. This paper examines the palaeoecological characteristics and the regional importance of this faunal turnover: 37% of all genera and 53% of all species became extinct between the older Chapadmalalan and the younger Barrancalobian chronostratigraphic units, a level that is actually higher than the percentage of genera extinct at the global-scaled Cretaceous - Tertiary extinction. The palaeoecological analysis permits to infer that the species-rich Chapadmalalan fauna seems to have been very balanced from the trophic - energetic point of view. On the other hand, the succeeding and less-explored Barrancalobian represents a relatively poorer environment, highly unbalanced in terms of the herbivore - carnivore relationships, due mainly to the absence of medium to large mammal and bird carnivores. The cause of the mid-Pliocene faunal turnover is still debatable. Climatic change has been traditionally related to this faunal turnover. Stratigraphically, an impact event dated at ca. 3.3 Ma is recorded in the succession. This event coincides with a change in the deep-sea stable isotopic record, reflecting a sudden change in climate and ocean circulation. This suggests that the impact might have induced regional faunal extinctions. Correlation with other areas different from the coast of Buenos Aires Province is needed to establish the geographic scale of the extinction. New fossils will provide a more complete and accurate picture of this remarkable faunal turnover.
publishDate 2004
dc.date.none.fl_str_mv 2004-10
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info:eu-repo/semantics/publishedVersion
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/81756
Vizcaíno, Sergio Fabián; Fariña, Richard A.; Zárate, Marcelo Arístides; Bargo, María Susana; Schultz, Peter; Palaeoecological implications of the mid-Pliocene faunal turnover in the Pampean Region (Argentina); Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 213; 1-2; 10-2004; 101-113
0031-0182
CONICET Digital
CONICET
url http://hdl.handle.net/11336/81756
identifier_str_mv Vizcaíno, Sergio Fabián; Fariña, Richard A.; Zárate, Marcelo Arístides; Bargo, María Susana; Schultz, Peter; Palaeoecological implications of the mid-Pliocene faunal turnover in the Pampean Region (Argentina); Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 213; 1-2; 10-2004; 101-113
0031-0182
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2004.07.004
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0031018204003657
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rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
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dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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