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dc.contributor.author
Ruffo Rey, Lautaro Julián
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dc.date.available
2024-03-01T13:54:05Z
dc.date.issued
2021-12
dc.identifier.citation
Ruffo Rey, Lautaro Julián; Vegetation dynamics of Cerro de Las Cabras Formation (Middle Triassic) from palynological assemblages and the Eco-Guild model: New paleoenvironmental and paleoclimatic interpretations; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 112; 12-2021; 1-19
dc.identifier.issn
0895-9811
dc.identifier.uri
http://hdl.handle.net/11336/229110
dc.description.abstract
The Cerro de Las Cabras Formation provides a great opportunity for advancing the understanding of Middle Triassic paleoclimates and terrestrial ecosystems. Previous palynological studies conducted at the type locality suggest it developed in a humid and warm environment, however, other lines of evidence would indicate rather semiarid conditions during its deposition. In order to test the first hypothesis, these same palynofloras are re-studied with a new methodological approach. The presented Eco-Guild model provides a conceptual framework for identifying the main abiotic factors that rule vegetation dynamics and composition. It incorporates the moisture requirement, temperature preference, adaptive strategy and body size of parent plants into the context of ecological successions.for their statistical analysis. The paleoecological re-study of palynofloras led to the identification of four palynophases (Woodland “A”,“B″, Riparian Forest “A”,“B″, Palustrine, Lacustrine “A”,“B″) related to two distinct plant zonations: a riverine zonation characterized by ruderal plants living in ephemeral to intermittent fluvial streams, and a lacustrine zonation which is subdivided into a stress-tolerant plant community related to standing water bodies of alkaline-saline conditions, and a plant association linked to small freshwater bodies in the surrounding floodplain area. Around these wetland areas were mesophytic forests of gymnosperms. On an individual scale, this whole ecosystem developed in a highly stressed environment but without major disturbance episodes. However, in stratigraphic terms, it developed under highly fluctuating climatic circumstances. Furthermore, at the middle part of the studied section a significant pulse of moistness was detected, which would be coincident to a major humidity episode occurred during the late Anisian–early Ladinian in central-western Argentina. These results would confirm for the first time the presence of this climatic event in the Uspallata Group (Cacheuta Sub-basin), thereby improving the knowledge regarding the paleoclimatic evolution of southwestern Gondwana during the Middle Triassic.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
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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
MIDDLE TRIASSIC
dc.subject
PALEOCLIMATES
dc.subject
PALEOECOLOGY
dc.subject
PALYNOLOGY
dc.subject
SOUTHWESTERN GONDWANA
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
Vegetation dynamics of Cerro de Las Cabras Formation (Middle Triassic) from palynological assemblages and the Eco-Guild model: New paleoenvironmental and paleoclimatic interpretations
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-03-01T13:30:34Z
dc.journal.volume
112
dc.journal.pagination
1-19
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Ruffo Rey, Lautaro Julián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
dc.journal.title
Journal of South American Earth Sciences
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jsames.2021.103629
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