Guadalfeo and Adra submarine deltas evolution in response to sediment supply variations

The Guadalfeo and the Adra submarine deltas off the northern coast of the Alboran Sea have been built up under the direct influence of short and mountainous rivers. The area is subjected to strong climatic seasonality, with sporadic winter torrential floods and high summer aridity. In addition numer...

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Detalles Bibliográficos
Autores: Mendes, I., Lobo, Francisco José, Ferreira, Ó., López-González, Nieves, Bárcenas-Gascón, Patricia, Fernández-Salas, L. M.
Tipo de recurso: otro
Estado:Versión publicada
Fecha de publicación:2015
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/320528
Acceso en línea:http://hdl.handle.net/10261/320528
Access Level:acceso abierto
Palabra clave:Centro Oceanográfico de Málaga
benthic foraminifera
Medio Marino
climatic variability
Human impact
deltaic environments
Alboran Sea
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spelling Guadalfeo and Adra submarine deltas evolution in response to sediment supply variationsEvolución de los deltas submarinos de los ríos Guadalfeo y Adra en respuesta a las variaciones de los aportes sedimentariosMendes, I.Lobo, Francisco JoséFerreira, Ó.López-González, NievesBárcenas-Gascón, PatriciaFernández-Salas, L. M.Centro Oceanográfico de Málagabenthic foraminiferaMedio Marinoclimatic variabilityHuman impactdeltaic environmentsAlboran SeaThe Guadalfeo and the Adra submarine deltas off the northern coast of the Alboran Sea have been built up under the direct influence of short and mountainous rivers. The area is subjected to strong climatic seasonality, with sporadic winter torrential floods and high summer aridity. In addition numerous anthropogenic activities have affected these systems, mostly during the last two centuries. In order to decode the influence of climatic variability and anthropogenic impacts on sediment supplies during the recent past, five sediment cores were collected from the Guadalfeo and Adra submarine deltas. Benthic foraminiferal and sedimentological analyses, combined with radiocarbon dating, were performed. The impact of torrential floods alternating with periods of low rainfall or dry periods were recorded in the Adra and Guadalfeo prodeltas. Periods with low abundance of benthic foraminifera and high amounts of coarse-grained sediments, were interpreted as the result of enhanced sediment supply to the shelf triggered by major flood events. On the other hand, periods with high amounts of fine-grained sediments and high abundances of colonizers and opportunistic foraminiferal species indicate the establishment of new environments with distinct ecological constraints. These environments were driven by lower sediment supplies during low rainfall or dry periods. The most recent sedimentation seems to reflect the human interventions in the rivers basins, such as deviation of the main river courses and dams construction, which reduced the sediment input and promoted the deposition of shallow-water submarine deltas.Ediciones Sia GrafDíaz-del-Río-Español, V. (Víctor)Bárcenas-Gascón, P. (Patricia)Fernández-Salas, L.M. (Luis Miguel)López-González, N. (Nieves)Palomino, D. (Desirée)Rueda, J.L. (José Luis)Sánchez-Guillamón, O. (Olga)Vázquez, J.T. (Juan Tomás)202320232015info:eu-repo/semantics/otherhttp://purl.org/coar/resource_type/c_3248Publisher's versioninfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bookParthttp://hdl.handle.net/10261/320528reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Málagainfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3205282026-05-22T06:33:51Z
dc.title.none.fl_str_mv Guadalfeo and Adra submarine deltas evolution in response to sediment supply variations
Evolución de los deltas submarinos de los ríos Guadalfeo y Adra en respuesta a las variaciones de los aportes sedimentarios
title Guadalfeo and Adra submarine deltas evolution in response to sediment supply variations
spellingShingle Guadalfeo and Adra submarine deltas evolution in response to sediment supply variations
Mendes, I.
Centro Oceanográfico de Málaga
benthic foraminifera
Medio Marino
climatic variability
Human impact
deltaic environments
Alboran Sea
title_short Guadalfeo and Adra submarine deltas evolution in response to sediment supply variations
title_full Guadalfeo and Adra submarine deltas evolution in response to sediment supply variations
title_fullStr Guadalfeo and Adra submarine deltas evolution in response to sediment supply variations
title_full_unstemmed Guadalfeo and Adra submarine deltas evolution in response to sediment supply variations
title_sort Guadalfeo and Adra submarine deltas evolution in response to sediment supply variations
dc.creator.none.fl_str_mv Mendes, I.
Lobo, Francisco José
Ferreira, Ó.
López-González, Nieves
Bárcenas-Gascón, Patricia
Fernández-Salas, L. M.
author Mendes, I.
author_facet Mendes, I.
Lobo, Francisco José
Ferreira, Ó.
López-González, Nieves
Bárcenas-Gascón, Patricia
Fernández-Salas, L. M.
author_role author
author2 Lobo, Francisco José
Ferreira, Ó.
López-González, Nieves
Bárcenas-Gascón, Patricia
Fernández-Salas, L. M.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Díaz-del-Río-Español, V. (Víctor)
Bárcenas-Gascón, P. (Patricia)
Fernández-Salas, L.M. (Luis Miguel)
López-González, N. (Nieves)
Palomino, D. (Desirée)
Rueda, J.L. (José Luis)
Sánchez-Guillamón, O. (Olga)
Vázquez, J.T. (Juan Tomás)
dc.subject.none.fl_str_mv Centro Oceanográfico de Málaga
benthic foraminifera
Medio Marino
climatic variability
Human impact
deltaic environments
Alboran Sea
topic Centro Oceanográfico de Málaga
benthic foraminifera
Medio Marino
climatic variability
Human impact
deltaic environments
Alboran Sea
description The Guadalfeo and the Adra submarine deltas off the northern coast of the Alboran Sea have been built up under the direct influence of short and mountainous rivers. The area is subjected to strong climatic seasonality, with sporadic winter torrential floods and high summer aridity. In addition numerous anthropogenic activities have affected these systems, mostly during the last two centuries. In order to decode the influence of climatic variability and anthropogenic impacts on sediment supplies during the recent past, five sediment cores were collected from the Guadalfeo and Adra submarine deltas. Benthic foraminiferal and sedimentological analyses, combined with radiocarbon dating, were performed. The impact of torrential floods alternating with periods of low rainfall or dry periods were recorded in the Adra and Guadalfeo prodeltas. Periods with low abundance of benthic foraminifera and high amounts of coarse-grained sediments, were interpreted as the result of enhanced sediment supply to the shelf triggered by major flood events. On the other hand, periods with high amounts of fine-grained sediments and high abundances of colonizers and opportunistic foraminiferal species indicate the establishment of new environments with distinct ecological constraints. These environments were driven by lower sediment supplies during low rainfall or dry periods. The most recent sedimentation seems to reflect the human interventions in the rivers basins, such as deviation of the main river courses and dams construction, which reduced the sediment input and promoted the deposition of shallow-water submarine deltas.
publishDate 2015
dc.date.none.fl_str_mv 2015
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/other
http://purl.org/coar/resource_type/c_3248
Publisher's version
info:eu-repo/semantics/publishedVersion
dc.type.openaire.fl_str_mv info:eu-repo/semantics/bookPart
format other
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/320528
url http://hdl.handle.net/10261/320528
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Málaga
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Ediciones Sia Graf
publisher.none.fl_str_mv Ediciones Sia Graf
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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