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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/103377
Ver los metadatos del registro completo
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oai:ri.conicet.gov.ar:11336/103377 |
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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 Técnicas2025-09-29T10:46:37Zoai: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:34982025-09-29 10:46:38.185CONICET 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_ |
1844614508335595520 |
score |
13.070432 |