Modern diatom assemblages in surface sediments from meso-macrotidal estuaries of Patagonia, Argentina

Autores
Espinosa, Marcela Alcira; Isla, Federico Ignacio
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The composition and distribution of diatom assemblages from surface sediments in the littoral zone of meso and macrotidal estuaries from Patagonia (Argentina) were studied with the aim to recover modern data on diatom distribution applicable to future paleoenvironmental reconstructions in coastal areas of Southern South America. Twenty-seven sites were selected to cover the maximum spatial distribution along the Negro, Chubut, Santa Cruz valleys and San Julián Bay. Salinity, water temperature, pH, sediment grain size and organic matter content were measured. Multivariate methods (cluster, CCA and NMDS analysis) were explored to analyse the relation between biotic and abiotic data. The results showed that the spatial distribution and species composition of diatom assemblages are strongly related to salinity and temperature. The diatom assemblages of riverine conditions (without salt-wedge influence) were characterized by high abundances of the freshwater diatom species Cocconeis placentula, C. euglypta and Aulacoseira granulata, meanwhile high abundances of marine and marine-brackish species such as Paralia sulcata, Rhaphoneis amphiceros, Delphineis surirella and Diploneis interrupta were characteristic of estuarine conditions (i.e. under salt-wedge influence). As temperature is directly related to latitude there are differences between northern and southern Patagonian communities. Different proportions or combinations of the taxa produce the distinction between assemblages. In southern estuaries with lower temperatures, the diatom assemblages are less diverse.
Fil: Espinosa, Marcela Alcira. 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. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Isla, Federico Ignacio. 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. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Materia
ENVIRONMENTAL PROXIES
SALINITY CHANGES
DIATOMS
SEDIMENTS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/108319
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/108319
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Modern diatom assemblages in surface sediments from meso-macrotidal estuaries of Patagonia, ArgentinaEspinosa, Marcela AlciraIsla, Federico IgnacioENVIRONMENTAL PROXIESSALINITY CHANGESDIATOMSSEDIMENTShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The composition and distribution of diatom assemblages from surface sediments in the littoral zone of meso and macrotidal estuaries from Patagonia (Argentina) were studied with the aim to recover modern data on diatom distribution applicable to future paleoenvironmental reconstructions in coastal areas of Southern South America. Twenty-seven sites were selected to cover the maximum spatial distribution along the Negro, Chubut, Santa Cruz valleys and San Julián Bay. Salinity, water temperature, pH, sediment grain size and organic matter content were measured. Multivariate methods (cluster, CCA and NMDS analysis) were explored to analyse the relation between biotic and abiotic data. The results showed that the spatial distribution and species composition of diatom assemblages are strongly related to salinity and temperature. The diatom assemblages of riverine conditions (without salt-wedge influence) were characterized by high abundances of the freshwater diatom species Cocconeis placentula, C. euglypta and Aulacoseira granulata, meanwhile high abundances of marine and marine-brackish species such as Paralia sulcata, Rhaphoneis amphiceros, Delphineis surirella and Diploneis interrupta were characteristic of estuarine conditions (i.e. under salt-wedge influence). As temperature is directly related to latitude there are differences between northern and southern Patagonian communities. Different proportions or combinations of the taxa produce the distinction between assemblages. In southern estuaries with lower temperatures, the diatom assemblages are less diverse.Fil: Espinosa, Marcela Alcira. 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. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Isla, Federico Ignacio. 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. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaPanamJAS2015-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/108319Espinosa, Marcela Alcira; Isla, Federico Ignacio; Modern diatom assemblages in surface sediments from meso-macrotidal estuaries of Patagonia, Argentina; PanamJAS; Pan-American Journal of Aquatic Sciences; 10; 1; 4-2015; 29-431809-9009CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://panamjas.org/pdf_artigos/PANAMJAS_10(1)_29-43.pdfinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:18:02Zoai:ri.conicet.gov.ar:11336/108319instacron: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 10:18:03.261CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Modern diatom assemblages in surface sediments from meso-macrotidal estuaries of Patagonia, Argentina
title Modern diatom assemblages in surface sediments from meso-macrotidal estuaries of Patagonia, Argentina
spellingShingle Modern diatom assemblages in surface sediments from meso-macrotidal estuaries of Patagonia, Argentina
Espinosa, Marcela Alcira
ENVIRONMENTAL PROXIES
SALINITY CHANGES
DIATOMS
SEDIMENTS
title_short Modern diatom assemblages in surface sediments from meso-macrotidal estuaries of Patagonia, Argentina
title_full Modern diatom assemblages in surface sediments from meso-macrotidal estuaries of Patagonia, Argentina
title_fullStr Modern diatom assemblages in surface sediments from meso-macrotidal estuaries of Patagonia, Argentina
title_full_unstemmed Modern diatom assemblages in surface sediments from meso-macrotidal estuaries of Patagonia, Argentina
title_sort Modern diatom assemblages in surface sediments from meso-macrotidal estuaries of Patagonia, Argentina
dc.creator.none.fl_str_mv Espinosa, Marcela Alcira
Isla, Federico Ignacio
author Espinosa, Marcela Alcira
author_facet Espinosa, Marcela Alcira
Isla, Federico Ignacio
author_role author
author2 Isla, Federico Ignacio
author2_role author
dc.subject.none.fl_str_mv ENVIRONMENTAL PROXIES
SALINITY CHANGES
DIATOMS
SEDIMENTS
topic ENVIRONMENTAL PROXIES
SALINITY CHANGES
DIATOMS
SEDIMENTS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The composition and distribution of diatom assemblages from surface sediments in the littoral zone of meso and macrotidal estuaries from Patagonia (Argentina) were studied with the aim to recover modern data on diatom distribution applicable to future paleoenvironmental reconstructions in coastal areas of Southern South America. Twenty-seven sites were selected to cover the maximum spatial distribution along the Negro, Chubut, Santa Cruz valleys and San Julián Bay. Salinity, water temperature, pH, sediment grain size and organic matter content were measured. Multivariate methods (cluster, CCA and NMDS analysis) were explored to analyse the relation between biotic and abiotic data. The results showed that the spatial distribution and species composition of diatom assemblages are strongly related to salinity and temperature. The diatom assemblages of riverine conditions (without salt-wedge influence) were characterized by high abundances of the freshwater diatom species Cocconeis placentula, C. euglypta and Aulacoseira granulata, meanwhile high abundances of marine and marine-brackish species such as Paralia sulcata, Rhaphoneis amphiceros, Delphineis surirella and Diploneis interrupta were characteristic of estuarine conditions (i.e. under salt-wedge influence). As temperature is directly related to latitude there are differences between northern and southern Patagonian communities. Different proportions or combinations of the taxa produce the distinction between assemblages. In southern estuaries with lower temperatures, the diatom assemblages are less diverse.
Fil: Espinosa, Marcela Alcira. 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. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Isla, Federico Ignacio. 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. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
description The composition and distribution of diatom assemblages from surface sediments in the littoral zone of meso and macrotidal estuaries from Patagonia (Argentina) were studied with the aim to recover modern data on diatom distribution applicable to future paleoenvironmental reconstructions in coastal areas of Southern South America. Twenty-seven sites were selected to cover the maximum spatial distribution along the Negro, Chubut, Santa Cruz valleys and San Julián Bay. Salinity, water temperature, pH, sediment grain size and organic matter content were measured. Multivariate methods (cluster, CCA and NMDS analysis) were explored to analyse the relation between biotic and abiotic data. The results showed that the spatial distribution and species composition of diatom assemblages are strongly related to salinity and temperature. The diatom assemblages of riverine conditions (without salt-wedge influence) were characterized by high abundances of the freshwater diatom species Cocconeis placentula, C. euglypta and Aulacoseira granulata, meanwhile high abundances of marine and marine-brackish species such as Paralia sulcata, Rhaphoneis amphiceros, Delphineis surirella and Diploneis interrupta were characteristic of estuarine conditions (i.e. under salt-wedge influence). As temperature is directly related to latitude there are differences between northern and southern Patagonian communities. Different proportions or combinations of the taxa produce the distinction between assemblages. In southern estuaries with lower temperatures, the diatom assemblages are less diverse.
publishDate 2015
dc.date.none.fl_str_mv 2015-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/108319
Espinosa, Marcela Alcira; Isla, Federico Ignacio; Modern diatom assemblages in surface sediments from meso-macrotidal estuaries of Patagonia, Argentina; PanamJAS; Pan-American Journal of Aquatic Sciences; 10; 1; 4-2015; 29-43
1809-9009
CONICET Digital
CONICET
url http://hdl.handle.net/11336/108319
identifier_str_mv Espinosa, Marcela Alcira; Isla, Federico Ignacio; Modern diatom assemblages in surface sediments from meso-macrotidal estuaries of Patagonia, Argentina; PanamJAS; Pan-American Journal of Aquatic Sciences; 10; 1; 4-2015; 29-43
1809-9009
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://panamjas.org/pdf_artigos/PANAMJAS_10(1)_29-43.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv PanamJAS
publisher.none.fl_str_mv PanamJAS
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str 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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score 13.070432

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