Influence of hydraulic conditions over dunes on the distribution of the benthic macroinvertebrates in a large sand bed river

Autores
Amsler, Mario Luis; Blettler, Martin Cesar Maria; Ezcurra, Ines Delia
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This study aims to relate the flow structure over mobile dunes recorded on the channel bed of the Paraná River (Argentina) with the spatial distribution of the benthic macroinvertebrates. The following main conclusions have been obtained: (1) the dunes found in the active channel could be considered as hydraulic biotopes at a mesohabitat scale: the bed forms in the thalweg region are subjected to higher shear stresses with low benthic densities; (2) differences in benthic densities were also recorded at within-dunes microhabitat scales: the largest densities were found in the dune troughs where small bed shear stresses occur and minimum densities on the low stoss side of dunes where turbulent agitation near the bottom strongly disturb the bed particles; (3) superimposed dunes on larger dunes may be considered as another microhabitat of still smaller dimensions. Summarizing, multiscale approaches are needed if a comprehensive understanding linking hydrodynamics and morphodynamics processes with benthic ecology is intended.
Fil: Amsler, Mario Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Fil: Blettler, Martin Cesar Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Fil: Ezcurra, Ines Delia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Materia
SHEAR STRESS
SAND DUNES
HYDRAULIC BIOTOPE
BENTHIC MACROINVERTEBRATES
MIDDLE PARANÁ RIVER
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/103377
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Influence of hydraulic conditions over dunes on the distribution of the benthic macroinvertebrates in a large sand bed riverAmsler, Mario LuisBlettler, Martin Cesar MariaEzcurra, Ines DeliaSHEAR STRESSSAND DUNESHYDRAULIC BIOTOPEBENTHIC MACROINVERTEBRATESMIDDLE PARANÁ RIVERhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1This study aims to relate the flow structure over mobile dunes recorded on the channel bed of the Paraná River (Argentina) with the spatial distribution of the benthic macroinvertebrates. The following main conclusions have been obtained: (1) the dunes found in the active channel could be considered as hydraulic biotopes at a mesohabitat scale: the bed forms in the thalweg region are subjected to higher shear stresses with low benthic densities; (2) differences in benthic densities were also recorded at within-dunes microhabitat scales: the largest densities were found in the dune troughs where small bed shear stresses occur and minimum densities on the low stoss side of dunes where turbulent agitation near the bottom strongly disturb the bed particles; (3) superimposed dunes on larger dunes may be considered as another microhabitat of still smaller dimensions. Summarizing, multiscale approaches are needed if a comprehensive understanding linking hydrodynamics and morphodynamics processes with benthic ecology is intended.Fil: Amsler, Mario Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; ArgentinaFil: Blettler, Martin Cesar Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; ArgentinaFil: Ezcurra, Ines Delia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; ArgentinaAmerican Geophysical Union2009-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/103377Amsler, Mario Luis; Blettler, Martin Cesar Maria; Ezcurra, Ines Delia; Influence of hydraulic conditions over dunes on the distribution of the benthic macroinvertebrates in a large sand bed river; American Geophysical Union; Water Resources Research; 45; 6; 6-2009; 1-150043-1397CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1029/2008WR007537info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:20:00Zoai:ri.conicet.gov.ar:11336/103377instacron: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:34982025-10-22 12:20:01.138CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Influence of hydraulic conditions over dunes on the distribution of the benthic macroinvertebrates in a large sand bed river
title Influence of hydraulic conditions over dunes on the distribution of the benthic macroinvertebrates in a large sand bed river
spellingShingle Influence of hydraulic conditions over dunes on the distribution of the benthic macroinvertebrates in a large sand bed river
Amsler, Mario Luis
SHEAR STRESS
SAND DUNES
HYDRAULIC BIOTOPE
BENTHIC MACROINVERTEBRATES
MIDDLE PARANÁ RIVER
title_short Influence of hydraulic conditions over dunes on the distribution of the benthic macroinvertebrates in a large sand bed river
title_full Influence of hydraulic conditions over dunes on the distribution of the benthic macroinvertebrates in a large sand bed river
title_fullStr Influence of hydraulic conditions over dunes on the distribution of the benthic macroinvertebrates in a large sand bed river
title_full_unstemmed Influence of hydraulic conditions over dunes on the distribution of the benthic macroinvertebrates in a large sand bed river
title_sort Influence of hydraulic conditions over dunes on the distribution of the benthic macroinvertebrates in a large sand bed river
dc.creator.none.fl_str_mv Amsler, Mario Luis
Blettler, Martin Cesar Maria
Ezcurra, Ines Delia
author Amsler, Mario Luis
author_facet Amsler, Mario Luis
Blettler, Martin Cesar Maria
Ezcurra, Ines Delia
author_role author
author2 Blettler, Martin Cesar Maria
Ezcurra, Ines Delia
author2_role author
author
dc.subject.none.fl_str_mv SHEAR STRESS
SAND DUNES
HYDRAULIC BIOTOPE
BENTHIC MACROINVERTEBRATES
MIDDLE PARANÁ RIVER
topic SHEAR STRESS
SAND DUNES
HYDRAULIC BIOTOPE
BENTHIC MACROINVERTEBRATES
MIDDLE PARANÁ RIVER
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv This study aims to relate the flow structure over mobile dunes recorded on the channel bed of the Paraná River (Argentina) with the spatial distribution of the benthic macroinvertebrates. The following main conclusions have been obtained: (1) the dunes found in the active channel could be considered as hydraulic biotopes at a mesohabitat scale: the bed forms in the thalweg region are subjected to higher shear stresses with low benthic densities; (2) differences in benthic densities were also recorded at within-dunes microhabitat scales: the largest densities were found in the dune troughs where small bed shear stresses occur and minimum densities on the low stoss side of dunes where turbulent agitation near the bottom strongly disturb the bed particles; (3) superimposed dunes on larger dunes may be considered as another microhabitat of still smaller dimensions. Summarizing, multiscale approaches are needed if a comprehensive understanding linking hydrodynamics and morphodynamics processes with benthic ecology is intended.
Fil: Amsler, Mario Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Fil: Blettler, Martin Cesar Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Fil: Ezcurra, Ines Delia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
description This study aims to relate the flow structure over mobile dunes recorded on the channel bed of the Paraná River (Argentina) with the spatial distribution of the benthic macroinvertebrates. The following main conclusions have been obtained: (1) the dunes found in the active channel could be considered as hydraulic biotopes at a mesohabitat scale: the bed forms in the thalweg region are subjected to higher shear stresses with low benthic densities; (2) differences in benthic densities were also recorded at within-dunes microhabitat scales: the largest densities were found in the dune troughs where small bed shear stresses occur and minimum densities on the low stoss side of dunes where turbulent agitation near the bottom strongly disturb the bed particles; (3) superimposed dunes on larger dunes may be considered as another microhabitat of still smaller dimensions. Summarizing, multiscale approaches are needed if a comprehensive understanding linking hydrodynamics and morphodynamics processes with benthic ecology is intended.
publishDate 2009
dc.date.none.fl_str_mv 2009-06
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/11336/103377
Amsler, Mario Luis; Blettler, Martin Cesar Maria; Ezcurra, Ines Delia; Influence of hydraulic conditions over dunes on the distribution of the benthic macroinvertebrates in a large sand bed river; American Geophysical Union; Water Resources Research; 45; 6; 6-2009; 1-15
0043-1397
CONICET Digital
CONICET
url http://hdl.handle.net/11336/103377
identifier_str_mv Amsler, Mario Luis; Blettler, Martin Cesar Maria; Ezcurra, Ines Delia; Influence of hydraulic conditions over dunes on the distribution of the benthic macroinvertebrates in a large sand bed river; American Geophysical Union; Water Resources Research; 45; 6; 6-2009; 1-15
0043-1397
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1029/2008WR007537
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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
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
_version_ 1846782643467714560
score 12.982451

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