Decoupling the spread of grasslands from the evolution of grazer-type herbivores in South America
- Autores
- Strömberg, Caroline A. E.; Dunn, Regan E.; Madden, Richard H.; Kohn, Matthew J.; Carlini, Alfredo Armando
- Año de publicación
- 2013
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The evolution of high-crowned cheek teeth (hypsodonty) in herbivorous mammals during the late Cenozoic is classically regarded as an adaptive response to the near-global spread of grass-dominated habitats. Precocious hypsodonty in middle Eocene (∼38 million years (Myr) ago) faunas from Patagonia, South America, is therefore thought to signal Earth's first grasslands, 20 million years earlier than elsewhere. Here, using a high-resolution, 43-18 million-year record of plant silica (phytoliths) from Patagonia, we show that although open-habitat grasses existed in southern South America since the middle Eocene (∼40 Myr ago), they were minor floral components in overall forested habitats between 40 and 18 Myr ago. Thus, distinctly different, continent-specific environmental conditions (arid grasslands versus ash-laden forests) triggered convergent cheek-tooth evolution in Cenozoic herbivores. Hypsodonty evolution is an important example where the present is an insufficient key to the past, and contextual information from fossils is vital for understanding processes of adaptation.
Facultad de Ciencias Naturales y Museo - Materia
-
Ciencias Naturales
Cenozoic herbivorous
South America - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/85547
Ver los metadatos del registro completo
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Decoupling the spread of grasslands from the evolution of grazer-type herbivores in South AmericaStrömberg, Caroline A. E.Dunn, Regan E.Madden, Richard H.Kohn, Matthew J.Carlini, Alfredo ArmandoCiencias NaturalesCenozoic herbivorousSouth AmericaThe evolution of high-crowned cheek teeth (hypsodonty) in herbivorous mammals during the late Cenozoic is classically regarded as an adaptive response to the near-global spread of grass-dominated habitats. Precocious hypsodonty in middle Eocene (∼38 million years (Myr) ago) faunas from Patagonia, South America, is therefore thought to signal Earth's first grasslands, 20 million years earlier than elsewhere. Here, using a high-resolution, 43-18 million-year record of plant silica (phytoliths) from Patagonia, we show that although open-habitat grasses existed in southern South America since the middle Eocene (∼40 Myr ago), they were minor floral components in overall forested habitats between 40 and 18 Myr ago. Thus, distinctly different, continent-specific environmental conditions (arid grasslands versus ash-laden forests) triggered convergent cheek-tooth evolution in Cenozoic herbivores. Hypsodonty evolution is an important example where the present is an insufficient key to the past, and contextual information from fossils is vital for understanding processes of adaptation.Facultad de Ciencias Naturales y Museo2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/85547enginfo:eu-repo/semantics/altIdentifier/issn/2041-1723info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms2508info: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:UNLP2025-09-29T11:16:30Zoai:sedici.unlp.edu.ar:10915/85547Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:31.119SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Decoupling the spread of grasslands from the evolution of grazer-type herbivores in South America |
title |
Decoupling the spread of grasslands from the evolution of grazer-type herbivores in South America |
spellingShingle |
Decoupling the spread of grasslands from the evolution of grazer-type herbivores in South America Strömberg, Caroline A. E. Ciencias Naturales Cenozoic herbivorous South America |
title_short |
Decoupling the spread of grasslands from the evolution of grazer-type herbivores in South America |
title_full |
Decoupling the spread of grasslands from the evolution of grazer-type herbivores in South America |
title_fullStr |
Decoupling the spread of grasslands from the evolution of grazer-type herbivores in South America |
title_full_unstemmed |
Decoupling the spread of grasslands from the evolution of grazer-type herbivores in South America |
title_sort |
Decoupling the spread of grasslands from the evolution of grazer-type herbivores in South America |
dc.creator.none.fl_str_mv |
Strömberg, Caroline A. E. Dunn, Regan E. Madden, Richard H. Kohn, Matthew J. Carlini, Alfredo Armando |
author |
Strömberg, Caroline A. E. |
author_facet |
Strömberg, Caroline A. E. Dunn, Regan E. Madden, Richard H. Kohn, Matthew J. Carlini, Alfredo Armando |
author_role |
author |
author2 |
Dunn, Regan E. Madden, Richard H. Kohn, Matthew J. Carlini, Alfredo Armando |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
Ciencias Naturales Cenozoic herbivorous South America |
topic |
Ciencias Naturales Cenozoic herbivorous South America |
dc.description.none.fl_txt_mv |
The evolution of high-crowned cheek teeth (hypsodonty) in herbivorous mammals during the late Cenozoic is classically regarded as an adaptive response to the near-global spread of grass-dominated habitats. Precocious hypsodonty in middle Eocene (∼38 million years (Myr) ago) faunas from Patagonia, South America, is therefore thought to signal Earth's first grasslands, 20 million years earlier than elsewhere. Here, using a high-resolution, 43-18 million-year record of plant silica (phytoliths) from Patagonia, we show that although open-habitat grasses existed in southern South America since the middle Eocene (∼40 Myr ago), they were minor floral components in overall forested habitats between 40 and 18 Myr ago. Thus, distinctly different, continent-specific environmental conditions (arid grasslands versus ash-laden forests) triggered convergent cheek-tooth evolution in Cenozoic herbivores. Hypsodonty evolution is an important example where the present is an insufficient key to the past, and contextual information from fossils is vital for understanding processes of adaptation. Facultad de Ciencias Naturales y Museo |
description |
The evolution of high-crowned cheek teeth (hypsodonty) in herbivorous mammals during the late Cenozoic is classically regarded as an adaptive response to the near-global spread of grass-dominated habitats. Precocious hypsodonty in middle Eocene (∼38 million years (Myr) ago) faunas from Patagonia, South America, is therefore thought to signal Earth's first grasslands, 20 million years earlier than elsewhere. Here, using a high-resolution, 43-18 million-year record of plant silica (phytoliths) from Patagonia, we show that although open-habitat grasses existed in southern South America since the middle Eocene (∼40 Myr ago), they were minor floral components in overall forested habitats between 40 and 18 Myr ago. Thus, distinctly different, continent-specific environmental conditions (arid grasslands versus ash-laden forests) triggered convergent cheek-tooth evolution in Cenozoic herbivores. Hypsodonty evolution is an important example where the present is an insufficient key to the past, and contextual information from fossils is vital for understanding processes of adaptation. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013 |
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/10915/85547 |
url |
http://sedici.unlp.edu.ar/handle/10915/85547 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/2041-1723 info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms2508 |
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 |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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application/pdf |
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