Fossil pollen records indicate that Patagonian desertification was not solely a consequence of Andean uplift

Autores
Palazzesi, Luis; Barreda, Viviana Dora; Cuitiño, José Ignacio; Guler, Maria Veronica; Tellería, María Cristina; Ventura Santos, R.
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Patagonian steppe—a massive rain-shadow on the lee side of the southern Andes—is assumed to have evolved ~15–12 Myr as a consequence of the southern Andean uplift. However, fossil evidence supporting this assumption is limited. Here we quantitatively estimate climatic conditions and plant richness for the interval ~10–6 Myr based on the study and bioclimatic analysis of terrestrially derived spore–pollen assemblages preserved in well-constrained Patagonian marine deposits. Our analyses indicate a mesothermal climate, with mean temperatures of the coldest quarter between 11.4 °C and 16.9 °C (presently ~3.5 °C) and annual precipitation rarely below 661 mm (presently ~200 mm). Rarefied richness reveals a significantly more diverse flora during the late Miocene than today at the same latitude but comparable with that approximately 2,000 km further northeast at mid-latitudes on the Brazilian coast. We infer that the Patagonian desertification was not solely a consequence of the Andean uplift as previously insinuated.
Facultad de Ciencias Naturales y Museo
Materia
Paleontología
Miocene
Palynology
Desertification
Patagonia
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/95476
Acceder
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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Fossil pollen records indicate that Patagonian desertification was not solely a consequence of Andean upliftPalazzesi, LuisBarreda, Viviana DoraCuitiño, José IgnacioGuler, Maria VeronicaTellería, María CristinaVentura Santos, R.PaleontologíaMiocenePalynologyDesertificationPatagoniaThe Patagonian steppe—a massive rain-shadow on the lee side of the southern Andes—is assumed to have evolved ~15–12 Myr as a consequence of the southern Andean uplift. However, fossil evidence supporting this assumption is limited. Here we quantitatively estimate climatic conditions and plant richness for the interval ~10–6 Myr based on the study and bioclimatic analysis of terrestrially derived spore–pollen assemblages preserved in well-constrained Patagonian marine deposits. Our analyses indicate a mesothermal climate, with mean temperatures of the coldest quarter between 11.4 °C and 16.9 °C (presently ~3.5 °C) and annual precipitation rarely below 661 mm (presently ~200 mm). Rarefied richness reveals a significantly more diverse flora during the late Miocene than today at the same latitude but comparable with that approximately 2,000 km further northeast at mid-latitudes on the Brazilian coast. We infer that the Patagonian desertification was not solely a consequence of the Andean uplift as previously insinuated.Facultad de Ciencias Naturales y Museo2014-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1-8http://sedici.unlp.edu.ar/handle/10915/95476enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/7533info:eu-repo/semantics/altIdentifier/url/http://www.nature.com/articles/ncomms4558info:eu-repo/semantics/altIdentifier/issn/2041-1723info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms4558info:eu-repo/semantics/altIdentifier/hdl/11336/7533info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:20:21Zoai:sedici.unlp.edu.ar:10915/95476Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:20:22.131SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Fossil pollen records indicate that Patagonian desertification was not solely a consequence of Andean uplift
title Fossil pollen records indicate that Patagonian desertification was not solely a consequence of Andean uplift
spellingShingle Fossil pollen records indicate that Patagonian desertification was not solely a consequence of Andean uplift
Palazzesi, Luis
Paleontología
Miocene
Palynology
Desertification
Patagonia
title_short Fossil pollen records indicate that Patagonian desertification was not solely a consequence of Andean uplift
title_full Fossil pollen records indicate that Patagonian desertification was not solely a consequence of Andean uplift
title_fullStr Fossil pollen records indicate that Patagonian desertification was not solely a consequence of Andean uplift
title_full_unstemmed Fossil pollen records indicate that Patagonian desertification was not solely a consequence of Andean uplift
title_sort Fossil pollen records indicate that Patagonian desertification was not solely a consequence of Andean uplift
dc.creator.none.fl_str_mv Palazzesi, Luis
Barreda, Viviana Dora
Cuitiño, José Ignacio
Guler, Maria Veronica
Tellería, María Cristina
Ventura Santos, R.
author Palazzesi, Luis
author_facet Palazzesi, Luis
Barreda, Viviana Dora
Cuitiño, José Ignacio
Guler, Maria Veronica
Tellería, María Cristina
Ventura Santos, R.
author_role author
author2 Barreda, Viviana Dora
Cuitiño, José Ignacio
Guler, Maria Veronica
Tellería, María Cristina
Ventura Santos, R.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Paleontología
Miocene
Palynology
Desertification
Patagonia
topic Paleontología
Miocene
Palynology
Desertification
Patagonia
dc.description.none.fl_txt_mv The Patagonian steppe—a massive rain-shadow on the lee side of the southern Andes—is assumed to have evolved ~15–12 Myr as a consequence of the southern Andean uplift. However, fossil evidence supporting this assumption is limited. Here we quantitatively estimate climatic conditions and plant richness for the interval ~10–6 Myr based on the study and bioclimatic analysis of terrestrially derived spore–pollen assemblages preserved in well-constrained Patagonian marine deposits. Our analyses indicate a mesothermal climate, with mean temperatures of the coldest quarter between 11.4 °C and 16.9 °C (presently ~3.5 °C) and annual precipitation rarely below 661 mm (presently ~200 mm). Rarefied richness reveals a significantly more diverse flora during the late Miocene than today at the same latitude but comparable with that approximately 2,000 km further northeast at mid-latitudes on the Brazilian coast. We infer that the Patagonian desertification was not solely a consequence of the Andean uplift as previously insinuated.
Facultad de Ciencias Naturales y Museo
description The Patagonian steppe—a massive rain-shadow on the lee side of the southern Andes—is assumed to have evolved ~15–12 Myr as a consequence of the southern Andean uplift. However, fossil evidence supporting this assumption is limited. Here we quantitatively estimate climatic conditions and plant richness for the interval ~10–6 Myr based on the study and bioclimatic analysis of terrestrially derived spore–pollen assemblages preserved in well-constrained Patagonian marine deposits. Our analyses indicate a mesothermal climate, with mean temperatures of the coldest quarter between 11.4 °C and 16.9 °C (presently ~3.5 °C) and annual precipitation rarely below 661 mm (presently ~200 mm). Rarefied richness reveals a significantly more diverse flora during the late Miocene than today at the same latitude but comparable with that approximately 2,000 km further northeast at mid-latitudes on the Brazilian coast. We infer that the Patagonian desertification was not solely a consequence of the Andean uplift as previously insinuated.
publishDate 2014
dc.date.none.fl_str_mv 2014-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/95476
url http://sedici.unlp.edu.ar/handle/10915/95476
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/7533
info:eu-repo/semantics/altIdentifier/url/http://www.nature.com/articles/ncomms4558
info:eu-repo/semantics/altIdentifier/issn/2041-1723
info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms4558
info:eu-repo/semantics/altIdentifier/hdl/11336/7533
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
1-8
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
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reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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