Assessing food availability in postglacial environments: Comparing assemblages from El Paso and Hoyada Verde formations, Pennsylvanian from Central Western argentinean basins

Autores
Halpern, Karen; Sterren, Andrea Fabiana; Cisterna, Gabriela Adriana
Año de publicación
2022
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The brachiopod and bivalve assemblages from coeval glacio-marine deposits of the Hoyada Verde and El Paso formations (late Serpukhovian–Bashkirian, Calingasta-Uspallata basin) have been thoroughly studied from taxonomic, biostratigraphic, and classical paleoecological views. Given their close geographical location, the marked compositional differences still raise some questions. Preliminary analysis suggests that it could be related to their bathymetrical preferences. Body size structure is highly sensitive to food availability and, therefore, an excellent study model for understanding the environmental context in which organisms developed. We hypothesize that a large influx of detritus in the water column sustains larger body sizes. This contribution aims to evaluate body size on local and regional scales. For that, 166 specimens were measured from articles previously published and the body size distribution was estimated using a geometric mean index by genus and an occurrences database. No significant differences between assemblages’ body size distributions were recognized, but bivalves seem to be smaller than brachiopods in Hoyada Verde, suggesting resource partitioning. From a stratigraphic point of view, both localities record an increase of body size in the lower part of the sections and then remain stable in the middle and upper parts. Minor variations detected along the sections could be indicating changes in food influx. On average, taxa in El Paso are smaller than in Hoyada Verde pointing to less food availability. Further, the dominance of detritivorous bivalves in El Paso also suggests oligotrophic conditions: brachiopods would intake from the water column while bivalves directly from the substrate.
Fil: Halpern, Karen. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Geología de Costas y del Cuaternario. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto de Geología de Costas y del Cuaternario; Argentina
Fil: Sterren, Andrea Fabiana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Cisterna, Gabriela Adriana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina. Universidad Nacional de La Rioja; Argentina
XII Congreso de la Asociación Paleontológica Argentina
Ciudad Autónoma de Buenos Aires
Argentina
Asociación Paleontológica Argentina
Materia
BRACHIOPODS
BIVALVES
BODY SIZE
PENNSYLVANIAN GLACIAL ENVIRONMENTS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/237829
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Assessing food availability in postglacial environments: Comparing assemblages from El Paso and Hoyada Verde formations, Pennsylvanian from Central Western argentinean basinsHalpern, KarenSterren, Andrea FabianaCisterna, Gabriela AdrianaBRACHIOPODSBIVALVESBODY SIZEPENNSYLVANIAN GLACIAL ENVIRONMENTShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The brachiopod and bivalve assemblages from coeval glacio-marine deposits of the Hoyada Verde and El Paso formations (late Serpukhovian–Bashkirian, Calingasta-Uspallata basin) have been thoroughly studied from taxonomic, biostratigraphic, and classical paleoecological views. Given their close geographical location, the marked compositional differences still raise some questions. Preliminary analysis suggests that it could be related to their bathymetrical preferences. Body size structure is highly sensitive to food availability and, therefore, an excellent study model for understanding the environmental context in which organisms developed. We hypothesize that a large influx of detritus in the water column sustains larger body sizes. This contribution aims to evaluate body size on local and regional scales. For that, 166 specimens were measured from articles previously published and the body size distribution was estimated using a geometric mean index by genus and an occurrences database. No significant differences between assemblages’ body size distributions were recognized, but bivalves seem to be smaller than brachiopods in Hoyada Verde, suggesting resource partitioning. From a stratigraphic point of view, both localities record an increase of body size in the lower part of the sections and then remain stable in the middle and upper parts. Minor variations detected along the sections could be indicating changes in food influx. On average, taxa in El Paso are smaller than in Hoyada Verde pointing to less food availability. Further, the dominance of detritivorous bivalves in El Paso also suggests oligotrophic conditions: brachiopods would intake from the water column while bivalves directly from the substrate.Fil: Halpern, Karen. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Geología de Costas y del Cuaternario. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto de Geología de Costas y del Cuaternario; ArgentinaFil: Sterren, Andrea Fabiana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Cisterna, Gabriela Adriana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina. Universidad Nacional de La Rioja; ArgentinaXII Congreso de la Asociación Paleontológica ArgentinaCiudad Autónoma de Buenos AiresArgentinaAsociación Paleontológica ArgentinaAsociación Paleontológica Argentina2022info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/237829Assessing food availability in postglacial environments: Comparing assemblages from El Paso and Hoyada Verde formations, Pennsylvanian from Central Western argentinean basins; XII Congreso de la Asociación Paleontológica Argentina; Ciudad Autónoma de Buenos Aires; Argentina; 2021; 53-542469-0228CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.peapaleontologica.org.ar/index.php/peapa/article/view/422info:eu-repo/semantics/altIdentifier/doi/10.5710/PEAPA.23.03.2022.422Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:31:13Zoai:ri.conicet.gov.ar:11336/237829instacron: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:34982025-10-15 14:31:13.369CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Assessing food availability in postglacial environments: Comparing assemblages from El Paso and Hoyada Verde formations, Pennsylvanian from Central Western argentinean basins
title Assessing food availability in postglacial environments: Comparing assemblages from El Paso and Hoyada Verde formations, Pennsylvanian from Central Western argentinean basins
spellingShingle Assessing food availability in postglacial environments: Comparing assemblages from El Paso and Hoyada Verde formations, Pennsylvanian from Central Western argentinean basins
Halpern, Karen
BRACHIOPODS
BIVALVES
BODY SIZE
PENNSYLVANIAN GLACIAL ENVIRONMENTS
title_short Assessing food availability in postglacial environments: Comparing assemblages from El Paso and Hoyada Verde formations, Pennsylvanian from Central Western argentinean basins
title_full Assessing food availability in postglacial environments: Comparing assemblages from El Paso and Hoyada Verde formations, Pennsylvanian from Central Western argentinean basins
title_fullStr Assessing food availability in postglacial environments: Comparing assemblages from El Paso and Hoyada Verde formations, Pennsylvanian from Central Western argentinean basins
title_full_unstemmed Assessing food availability in postglacial environments: Comparing assemblages from El Paso and Hoyada Verde formations, Pennsylvanian from Central Western argentinean basins
title_sort Assessing food availability in postglacial environments: Comparing assemblages from El Paso and Hoyada Verde formations, Pennsylvanian from Central Western argentinean basins
dc.creator.none.fl_str_mv Halpern, Karen
Sterren, Andrea Fabiana
Cisterna, Gabriela Adriana
author Halpern, Karen
author_facet Halpern, Karen
Sterren, Andrea Fabiana
Cisterna, Gabriela Adriana
author_role author
author2 Sterren, Andrea Fabiana
Cisterna, Gabriela Adriana
author2_role author
author
dc.subject.none.fl_str_mv BRACHIOPODS
BIVALVES
BODY SIZE
PENNSYLVANIAN GLACIAL ENVIRONMENTS
topic BRACHIOPODS
BIVALVES
BODY SIZE
PENNSYLVANIAN GLACIAL ENVIRONMENTS
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 brachiopod and bivalve assemblages from coeval glacio-marine deposits of the Hoyada Verde and El Paso formations (late Serpukhovian–Bashkirian, Calingasta-Uspallata basin) have been thoroughly studied from taxonomic, biostratigraphic, and classical paleoecological views. Given their close geographical location, the marked compositional differences still raise some questions. Preliminary analysis suggests that it could be related to their bathymetrical preferences. Body size structure is highly sensitive to food availability and, therefore, an excellent study model for understanding the environmental context in which organisms developed. We hypothesize that a large influx of detritus in the water column sustains larger body sizes. This contribution aims to evaluate body size on local and regional scales. For that, 166 specimens were measured from articles previously published and the body size distribution was estimated using a geometric mean index by genus and an occurrences database. No significant differences between assemblages’ body size distributions were recognized, but bivalves seem to be smaller than brachiopods in Hoyada Verde, suggesting resource partitioning. From a stratigraphic point of view, both localities record an increase of body size in the lower part of the sections and then remain stable in the middle and upper parts. Minor variations detected along the sections could be indicating changes in food influx. On average, taxa in El Paso are smaller than in Hoyada Verde pointing to less food availability. Further, the dominance of detritivorous bivalves in El Paso also suggests oligotrophic conditions: brachiopods would intake from the water column while bivalves directly from the substrate.
Fil: Halpern, Karen. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Geología de Costas y del Cuaternario. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto de Geología de Costas y del Cuaternario; Argentina
Fil: Sterren, Andrea Fabiana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Cisterna, Gabriela Adriana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina. Universidad Nacional de La Rioja; Argentina
XII Congreso de la Asociación Paleontológica Argentina
Ciudad Autónoma de Buenos Aires
Argentina
Asociación Paleontológica Argentina
description The brachiopod and bivalve assemblages from coeval glacio-marine deposits of the Hoyada Verde and El Paso formations (late Serpukhovian–Bashkirian, Calingasta-Uspallata basin) have been thoroughly studied from taxonomic, biostratigraphic, and classical paleoecological views. Given their close geographical location, the marked compositional differences still raise some questions. Preliminary analysis suggests that it could be related to their bathymetrical preferences. Body size structure is highly sensitive to food availability and, therefore, an excellent study model for understanding the environmental context in which organisms developed. We hypothesize that a large influx of detritus in the water column sustains larger body sizes. This contribution aims to evaluate body size on local and regional scales. For that, 166 specimens were measured from articles previously published and the body size distribution was estimated using a geometric mean index by genus and an occurrences database. No significant differences between assemblages’ body size distributions were recognized, but bivalves seem to be smaller than brachiopods in Hoyada Verde, suggesting resource partitioning. From a stratigraphic point of view, both localities record an increase of body size in the lower part of the sections and then remain stable in the middle and upper parts. Minor variations detected along the sections could be indicating changes in food influx. On average, taxa in El Paso are smaller than in Hoyada Verde pointing to less food availability. Further, the dominance of detritivorous bivalves in El Paso also suggests oligotrophic conditions: brachiopods would intake from the water column while bivalves directly from the substrate.
publishDate 2022
dc.date.none.fl_str_mv 2022
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Congreso
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info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/237829
Assessing food availability in postglacial environments: Comparing assemblages from El Paso and Hoyada Verde formations, Pennsylvanian from Central Western argentinean basins; XII Congreso de la Asociación Paleontológica Argentina; Ciudad Autónoma de Buenos Aires; Argentina; 2021; 53-54
2469-0228
CONICET Digital
CONICET
url http://hdl.handle.net/11336/237829
identifier_str_mv Assessing food availability in postglacial environments: Comparing assemblages from El Paso and Hoyada Verde formations, Pennsylvanian from Central Western argentinean basins; XII Congreso de la Asociación Paleontológica Argentina; Ciudad Autónoma de Buenos Aires; Argentina; 2021; 53-54
2469-0228
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.peapaleontologica.org.ar/index.php/peapa/article/view/422
info:eu-repo/semantics/altIdentifier/doi/10.5710/PEAPA.23.03.2022.422
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application/pdf
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dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Asociación Paleontológica Argentina
publisher.none.fl_str_mv Asociación Paleontológica Argentina
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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