The rise of C4 grasses in Argentina: Linking grassland transition to the South American summer Monsoon using sediments, paleosols, phytoliths and isotopes
- Autores
- Hyland, E. G.; Cotton, Jennifer M.; Ghosh, Adit; Hauswirth, S. C.; Littleton, S.; Azmi, Iffat; Insel, Nadja; Raigemborn, María Sol; Tineo, David
- Año de publicación
- 2023
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- The expansion of C4 grasses is one of the most dramatic ecological changes in the past 65 million years. Beginning in the late Miocene (~10-5 Ma), these tropical and subtropical grasses began to spread and now cover roughly 25% of the Earth´s surface. C4 grasses include economically and ecologically important crops, but the environmental conditions that drove this global expansion are poorly understood. In this study, we aim to determine the drivers of C4 grass expansion in central South America (Argentina). We hypothesize that this expansion was driven by the strengthening of the South American Summer Monsoon (SASM), which occurred as a result of regional climatic change related to local tectonic and global climatic processes. Using sedimentology/stratigraphy, paleopedology and geochemistry, phytolith and carbon isotope reconstructions, and biomarkers, we present paired reconstructions of environmental and climatic conditions and the abundance of C4 grasses across 7 sites in northern and central Argentina to assess the timing of this ecological transition in South America during the late Miocene-Pliocene. We find that in the absence of temperature and atmospheric CO2 changes, regional hydrologic change is likely the driver of C4 grass abundances in the Miocene. In northwest and central Argentina, our data suggests that increased precipitation seasonality brought about by the intensification of the South American Monsoon drove the expansion of C4 grasses, at least in the more humid regions. These results are supported by Community Earth System Model simulations that suggest an increase in summer precipitation along the eastern foothills of the Andes in Argentina between 8 and 3 Ma. Our data does not show a correlation between fire frequency and C4 grass abundance in Argentina, unlike other regions where this may drive the expansion. We also note that we only find moderate to high abundances of C4 grasses in areas where proxy-based precipitation estimates exceed ~500 mm/yr, and do not observe C4 grasses at sites with modern elevations higher than ~3,000 feet or behind rain shadows, showing that tectonically driven conditions are important controls on the distribution and spread of C4 grasses.
Fil: Hyland, E. G.. North Carolina State University; Estados Unidos
Fil: Cotton, Jennifer M.. California State University; Estados Unidos
Fil: Ghosh, Adit. University of Southern California; Estados Unidos
Fil: Hauswirth, S. C.. California State University; Estados Unidos
Fil: Littleton, S.. California State University; Estados Unidos
Fil: Azmi, Iffat. North Carolina State University; Estados Unidos
Fil: Insel, Nadja. Northeastern Illinois University (northeastern Illinois);
Fil: Raigemborn, María Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Tineo, David. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
XVIII Reunión Argentina de Sedimentología y IX Congreso Latinoamericano de Sedimentología
La Plata
Argentina
Asociación Sedimentológica Argentina - Materia
-
C4 GRASSES
SOUTH AMERICAN SUMMER MONSOON
ARGENTINA
SEDIMENTS, PALEOSOLS, PHYTOLITHS AND ISOTOPES - 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:11336/233992
Ver los metadatos del registro completo
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The rise of C4 grasses in Argentina: Linking grassland transition to the South American summer Monsoon using sediments, paleosols, phytoliths and isotopesHyland, E. G.Cotton, Jennifer M.Ghosh, AditHauswirth, S. C.Littleton, S.Azmi, IffatInsel, NadjaRaigemborn, María SolTineo, DavidC4 GRASSESSOUTH AMERICAN SUMMER MONSOONARGENTINASEDIMENTS, PALEOSOLS, PHYTOLITHS AND ISOTOPEShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The expansion of C4 grasses is one of the most dramatic ecological changes in the past 65 million years. Beginning in the late Miocene (~10-5 Ma), these tropical and subtropical grasses began to spread and now cover roughly 25% of the Earth´s surface. C4 grasses include economically and ecologically important crops, but the environmental conditions that drove this global expansion are poorly understood. In this study, we aim to determine the drivers of C4 grass expansion in central South America (Argentina). We hypothesize that this expansion was driven by the strengthening of the South American Summer Monsoon (SASM), which occurred as a result of regional climatic change related to local tectonic and global climatic processes. Using sedimentology/stratigraphy, paleopedology and geochemistry, phytolith and carbon isotope reconstructions, and biomarkers, we present paired reconstructions of environmental and climatic conditions and the abundance of C4 grasses across 7 sites in northern and central Argentina to assess the timing of this ecological transition in South America during the late Miocene-Pliocene. We find that in the absence of temperature and atmospheric CO2 changes, regional hydrologic change is likely the driver of C4 grass abundances in the Miocene. In northwest and central Argentina, our data suggests that increased precipitation seasonality brought about by the intensification of the South American Monsoon drove the expansion of C4 grasses, at least in the more humid regions. These results are supported by Community Earth System Model simulations that suggest an increase in summer precipitation along the eastern foothills of the Andes in Argentina between 8 and 3 Ma. Our data does not show a correlation between fire frequency and C4 grass abundance in Argentina, unlike other regions where this may drive the expansion. We also note that we only find moderate to high abundances of C4 grasses in areas where proxy-based precipitation estimates exceed ~500 mm/yr, and do not observe C4 grasses at sites with modern elevations higher than ~3,000 feet or behind rain shadows, showing that tectonically driven conditions are important controls on the distribution and spread of C4 grasses.Fil: Hyland, E. G.. North Carolina State University; Estados UnidosFil: Cotton, Jennifer M.. California State University; Estados UnidosFil: Ghosh, Adit. University of Southern California; Estados UnidosFil: Hauswirth, S. C.. California State University; Estados UnidosFil: Littleton, S.. California State University; Estados UnidosFil: Azmi, Iffat. North Carolina State University; Estados UnidosFil: Insel, Nadja. Northeastern Illinois University (northeastern Illinois);Fil: Raigemborn, María Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Tineo, David. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaXVIII Reunión Argentina de Sedimentología y IX Congreso Latinoamericano de SedimentologíaLa PlataArgentinaAsociación Sedimentológica ArgentinaAsociación Sedimentológica ArgentinaLizzoli, SabrinaIsla, Manuel FermínLópez, ManuelMoyano Paz, DamiánRaigemborn, María Sol2023info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/233992The rise of C4 grasses in Argentina: Linking grassland transition to the South American summer Monsoon using sediments, paleosols, phytoliths and isotopes; XVIII Reunión Argentina de Sedimentología y IX Congreso Latinoamericano de Sedimentología; La Plata; Argentina; 2023; 32-32978-631-90299-0-1CONICET DigitalCONICETengNacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:47:22Zoai:ri.conicet.gov.ar:11336/233992instacron: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 09:47:22.823CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
The rise of C4 grasses in Argentina: Linking grassland transition to the South American summer Monsoon using sediments, paleosols, phytoliths and isotopes |
title |
The rise of C4 grasses in Argentina: Linking grassland transition to the South American summer Monsoon using sediments, paleosols, phytoliths and isotopes |
spellingShingle |
The rise of C4 grasses in Argentina: Linking grassland transition to the South American summer Monsoon using sediments, paleosols, phytoliths and isotopes Hyland, E. G. C4 GRASSES SOUTH AMERICAN SUMMER MONSOON ARGENTINA SEDIMENTS, PALEOSOLS, PHYTOLITHS AND ISOTOPES |
title_short |
The rise of C4 grasses in Argentina: Linking grassland transition to the South American summer Monsoon using sediments, paleosols, phytoliths and isotopes |
title_full |
The rise of C4 grasses in Argentina: Linking grassland transition to the South American summer Monsoon using sediments, paleosols, phytoliths and isotopes |
title_fullStr |
The rise of C4 grasses in Argentina: Linking grassland transition to the South American summer Monsoon using sediments, paleosols, phytoliths and isotopes |
title_full_unstemmed |
The rise of C4 grasses in Argentina: Linking grassland transition to the South American summer Monsoon using sediments, paleosols, phytoliths and isotopes |
title_sort |
The rise of C4 grasses in Argentina: Linking grassland transition to the South American summer Monsoon using sediments, paleosols, phytoliths and isotopes |
dc.creator.none.fl_str_mv |
Hyland, E. G. Cotton, Jennifer M. Ghosh, Adit Hauswirth, S. C. Littleton, S. Azmi, Iffat Insel, Nadja Raigemborn, María Sol Tineo, David |
author |
Hyland, E. G. |
author_facet |
Hyland, E. G. Cotton, Jennifer M. Ghosh, Adit Hauswirth, S. C. Littleton, S. Azmi, Iffat Insel, Nadja Raigemborn, María Sol Tineo, David |
author_role |
author |
author2 |
Cotton, Jennifer M. Ghosh, Adit Hauswirth, S. C. Littleton, S. Azmi, Iffat Insel, Nadja Raigemborn, María Sol Tineo, David |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Lizzoli, Sabrina Isla, Manuel Fermín López, Manuel Moyano Paz, Damián Raigemborn, María Sol |
dc.subject.none.fl_str_mv |
C4 GRASSES SOUTH AMERICAN SUMMER MONSOON ARGENTINA SEDIMENTS, PALEOSOLS, PHYTOLITHS AND ISOTOPES |
topic |
C4 GRASSES SOUTH AMERICAN SUMMER MONSOON ARGENTINA SEDIMENTS, PALEOSOLS, PHYTOLITHS AND ISOTOPES |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The expansion of C4 grasses is one of the most dramatic ecological changes in the past 65 million years. Beginning in the late Miocene (~10-5 Ma), these tropical and subtropical grasses began to spread and now cover roughly 25% of the Earth´s surface. C4 grasses include economically and ecologically important crops, but the environmental conditions that drove this global expansion are poorly understood. In this study, we aim to determine the drivers of C4 grass expansion in central South America (Argentina). We hypothesize that this expansion was driven by the strengthening of the South American Summer Monsoon (SASM), which occurred as a result of regional climatic change related to local tectonic and global climatic processes. Using sedimentology/stratigraphy, paleopedology and geochemistry, phytolith and carbon isotope reconstructions, and biomarkers, we present paired reconstructions of environmental and climatic conditions and the abundance of C4 grasses across 7 sites in northern and central Argentina to assess the timing of this ecological transition in South America during the late Miocene-Pliocene. We find that in the absence of temperature and atmospheric CO2 changes, regional hydrologic change is likely the driver of C4 grass abundances in the Miocene. In northwest and central Argentina, our data suggests that increased precipitation seasonality brought about by the intensification of the South American Monsoon drove the expansion of C4 grasses, at least in the more humid regions. These results are supported by Community Earth System Model simulations that suggest an increase in summer precipitation along the eastern foothills of the Andes in Argentina between 8 and 3 Ma. Our data does not show a correlation between fire frequency and C4 grass abundance in Argentina, unlike other regions where this may drive the expansion. We also note that we only find moderate to high abundances of C4 grasses in areas where proxy-based precipitation estimates exceed ~500 mm/yr, and do not observe C4 grasses at sites with modern elevations higher than ~3,000 feet or behind rain shadows, showing that tectonically driven conditions are important controls on the distribution and spread of C4 grasses. Fil: Hyland, E. G.. North Carolina State University; Estados Unidos Fil: Cotton, Jennifer M.. California State University; Estados Unidos Fil: Ghosh, Adit. University of Southern California; Estados Unidos Fil: Hauswirth, S. C.. California State University; Estados Unidos Fil: Littleton, S.. California State University; Estados Unidos Fil: Azmi, Iffat. North Carolina State University; Estados Unidos Fil: Insel, Nadja. Northeastern Illinois University (northeastern Illinois); Fil: Raigemborn, María Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina Fil: Tineo, David. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina XVIII Reunión Argentina de Sedimentología y IX Congreso Latinoamericano de Sedimentología La Plata Argentina Asociación Sedimentológica Argentina |
description |
The expansion of C4 grasses is one of the most dramatic ecological changes in the past 65 million years. Beginning in the late Miocene (~10-5 Ma), these tropical and subtropical grasses began to spread and now cover roughly 25% of the Earth´s surface. C4 grasses include economically and ecologically important crops, but the environmental conditions that drove this global expansion are poorly understood. In this study, we aim to determine the drivers of C4 grass expansion in central South America (Argentina). We hypothesize that this expansion was driven by the strengthening of the South American Summer Monsoon (SASM), which occurred as a result of regional climatic change related to local tectonic and global climatic processes. Using sedimentology/stratigraphy, paleopedology and geochemistry, phytolith and carbon isotope reconstructions, and biomarkers, we present paired reconstructions of environmental and climatic conditions and the abundance of C4 grasses across 7 sites in northern and central Argentina to assess the timing of this ecological transition in South America during the late Miocene-Pliocene. We find that in the absence of temperature and atmospheric CO2 changes, regional hydrologic change is likely the driver of C4 grass abundances in the Miocene. In northwest and central Argentina, our data suggests that increased precipitation seasonality brought about by the intensification of the South American Monsoon drove the expansion of C4 grasses, at least in the more humid regions. These results are supported by Community Earth System Model simulations that suggest an increase in summer precipitation along the eastern foothills of the Andes in Argentina between 8 and 3 Ma. Our data does not show a correlation between fire frequency and C4 grass abundance in Argentina, unlike other regions where this may drive the expansion. We also note that we only find moderate to high abundances of C4 grasses in areas where proxy-based precipitation estimates exceed ~500 mm/yr, and do not observe C4 grasses at sites with modern elevations higher than ~3,000 feet or behind rain shadows, showing that tectonically driven conditions are important controls on the distribution and spread of C4 grasses. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/conferenceObject Reunión Book http://purl.org/coar/resource_type/c_5794 info:ar-repo/semantics/documentoDeConferencia |
status_str |
publishedVersion |
format |
conferenceObject |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/233992 The rise of C4 grasses in Argentina: Linking grassland transition to the South American summer Monsoon using sediments, paleosols, phytoliths and isotopes; XVIII Reunión Argentina de Sedimentología y IX Congreso Latinoamericano de Sedimentología; La Plata; Argentina; 2023; 32-32 978-631-90299-0-1 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/233992 |
identifier_str_mv |
The rise of C4 grasses in Argentina: Linking grassland transition to the South American summer Monsoon using sediments, paleosols, phytoliths and isotopes; XVIII Reunión Argentina de Sedimentología y IX Congreso Latinoamericano de Sedimentología; La Plata; Argentina; 2023; 32-32 978-631-90299-0-1 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.coverage.none.fl_str_mv |
Nacional |
dc.publisher.none.fl_str_mv |
Asociación Sedimentológica Argentina |
publisher.none.fl_str_mv |
Asociación Sedimentológica Argentina |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.070432 |