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dc.contributor.author
Antoine, Pierre Olivier
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dc.contributor.author
Yans, Johan
dc.contributor.author
Aliaga Castillo, Angelica
dc.contributor.author
Stutz, Narla
dc.contributor.author
Abello, María Alejandra
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dc.contributor.author
Adnet, Sylvain
dc.contributor.author
Andriolli Custódio, Michele
dc.contributor.author
Benites Palomino, Aldo
dc.contributor.author
Billet, Guillaume
dc.contributor.author
Boivin, Myriam
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dc.contributor.author
Herrera, Fabiany
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Jaramillo, Carlos
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Mártinez, Camila
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Moreno, Federico
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Navarrete, Rosa E.
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Negri, Francisco Ricardo
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Parra, Francisco
dc.contributor.author
Pujos, François Roger Francis
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dc.contributor.author
Rage, Jean-Claude
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Ribeiro, Ana Maria
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Robinet, Céline
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Roddaz, Martin
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Tejada Lara, Julia V.
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Varas-Malca, Rafael
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Ventura Santos, Roberto
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Salas Gismondi, Rodolfo
dc.contributor.author
Marivaux, Laurent
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dc.date.available
2022-05-31T02:38:13Z
dc.date.issued
2021-05
dc.identifier.citation
Antoine, Pierre Olivier; Yans, Johan; Aliaga Castillo, Angelica; Stutz, Narla; Abello, María Alejandra; et al.; Biotic community and landscape changes around the Eocene-Oligocene transition at Shapaja, Peruvian Amazonia: regional or global drivers?; Elsevier Science; Global and Planetary Change; 202; 512; 5-2021; 1-20
dc.identifier.issn
0921-8181
dc.identifier.uri
http://hdl.handle.net/11336/158517
dc.description.abstract
Since 2012, we have investigated a stratigraphic section encompassing the late Eocene–earliest Oligocene interval at Shapaja (Tarapoto area, Peruvian Amazonia, ca. 7°S), through paleontological and geological fieldwork. The measured sedimentary series (120 m-thick [West] plus 90 m-thick [East]), assigned to the upper member of the Pozo Formation, records fluvial micro-conglomeratic lenses intercalated with floodplain and evaporite-rich fine red deposits, estuarine/coastal-plain tidally-influenced fine sandstones, and oxbow lake nodule-rich blue clays. This sedimentary shift coincides locally with the demise of the large Eocene coastal-plain wetland known as Pozo System. The late Eocene–early Oligocene Shapaja section was extensively sampled for chemostratigraphy (δ13C on dispersed organic matter and pedogenic carbonate nodules), which in turn allowed for refining the location of the Eocene-Oligocene Transition (EOT) and other climatic events recognized at a global scale (i.e., Oi-1 and Oi-1a). The section has yielded nine fossil localities with plant remains (leaves, wood, charophytes, and palynomorphs), mollusks, decapods, and/or vertebrates (selachians, actinopterygians, lungfishes, amphibians, sauropsids, and mammals), documenting ~130 distinct taxa. Four localities of the upper member of the Pozo Formation at Shapaja predate the EOT, one is clearly within the EOT, while four are earliest/early Oligocene in age. The small leaf impressions found along the Shapaja section could be indicative of dry and/or seasonal conditions for this region throughout and after the EOT. Monkeys, indicative of tropical rainforest environments, are only recorded in a latest Eocene locality (TAR-21). Two biotic turnovers are perceptible in the selachian, metatherian, and rodent communities, well before the EOT [~35–36 Ma] and a few hundred thousand years after the EOT [~33 Ma]. The latter turnover seems to be primarily related to a global sea-level drop (ichthyofauna: marine-littoral elements replaced by obligate freshwater taxa) and/or the onset of a drier and more seasonal climate in early Oligocene times (terrestrial components). Changes in the structure of the Shapaja paleocommunities were mostly driven by the flexural subsidence during the late Eocene, and then globally driven by the earliest Oligocene climatic deterioration.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ANDES-AMAZONIA TRANSITION
dc.subject
POZO SYSTEM DEMISE
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PALEONTOLOGY
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SEDIMENTARY GEOLOGY
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CHEMOSTRATIGRAPHY
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PALEOENVIRONMENTS
dc.subject.classification
Paleontología
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Biotic community and landscape changes around the Eocene-Oligocene transition at Shapaja, Peruvian Amazonia: regional or global drivers?
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-05-06T16:10:05Z
dc.journal.volume
202
dc.journal.number
512
dc.journal.pagination
1-20
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Antoine, Pierre Olivier. Université Montpellier II; Francia
dc.description.fil
Fil: Yans, Johan. University of Namur; Bélgica
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Fil: Aliaga Castillo, Angelica. Universidad Nacional Mayor de San Marcos; Perú
dc.description.fil
Fil: Stutz, Narla. Université Montpellier II; Francia
dc.description.fil
Fil: Abello, María Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina
dc.description.fil
Fil: Adnet, Sylvain. Université Montpellier II; Francia
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Fil: Andriolli Custódio, Michele. Universidade do Brasília; Brasil
dc.description.fil
Fil: Benites Palomino, Aldo. Universidad Nacional Mayor de San Marcos; Perú. Universitat Zurich; Suiza
dc.description.fil
Fil: Billet, Guillaume. Muséum National d'Histoire Naturelle; Francia
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Fil: Boivin, Myriam. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina
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Fil: Herrera, Fabiany. Chicago Botanic Garden; Estados Unidos
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Fil: Jaramillo, Carlos. Smithsonian Tropical Research Institute; Panamá
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Fil: Mártinez, Camila. Smithsonian Tropical Research Institute; Panamá
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Fil: Moreno, Federico. Smithsonian Tropical Research Institute; Panamá
dc.description.fil
Fil: Navarrete, Rosa E.. Paleosedes E.U., Bogota; Colombia
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Fil: Negri, Francisco Ricardo. Universidade Federal Do Acre; Brasil
dc.description.fil
Fil: Parra, Francisco. Universidad Nacional de Colombia; Colombia. Paleosedes E.U.; Colombia
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Fil: Pujos, François Roger Francis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
dc.description.fil
Fil: Rage, Jean-Claude. Muséum National d'Histoire Naturelle; Francia
dc.description.fil
Fil: Ribeiro, Ana Maria. Universidade Federal do Rio Grande do Sul; Brasil
dc.description.fil
Fil: Robinet, Céline. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina
dc.description.fil
Fil: Roddaz, Martin. Universidade do Brasília; Brasil
dc.description.fil
Fil: Tejada Lara, Julia V.. Universidad Nacional Mayor de San Marcos; Perú. Université Montpellier II; Francia
dc.description.fil
Fil: Varas-Malca, Rafael. Universidad Nacional Mayor de San Marcos; Perú
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Fil: Ventura Santos, Roberto. Universidade do Brasília; Brasil
dc.description.fil
Fil: Salas Gismondi, Rodolfo. Universidad Nacional Mayor de San Marcos; Perú
dc.description.fil
Fil: Marivaux, Laurent. Université Montpellier II; Francia
dc.journal.title
Global and Planetary Change
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.gloplacha.2021.103512
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0921818121000977?via%3Dihub
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