Modern sedimentation patterns and human impacts on the Barcelona continental shelf (NE Spain).
Seafloor sediments were collected from the Barcelona continental shelf, NE Spain, to determine the textural characteristics and sedimentary processes related to different depositional systems and human pressures. The Barcelona continental shelf is principally influenced by the discharge of the Llobr...
| Autores: | , , , , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2009 |
| País: | España |
| Recursos: | Universidad de Barcelona |
| Repositório: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/16901 |
| Acesso em linha: | https://hdl.handle.net/2445/16901 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Plataforma continental Sediments marins Influència de l'home en la natura Barcelona (Catalunya) Continental shelf Marine sediments Effect of human beings on nature Barcelona (Catalonia) |
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Modern sedimentation patterns and human impacts on the Barcelona continental shelf (NE Spain).Liquete García, CaminoLucchi, R. G.Garcia-Orellana, JordiCanals Artigas, MiquelMasqué, PerePasqual Mas, CatalinaLavoie, CarolinePlataforma continentalSediments marinsInfluència de l'home en la naturaBarcelona (Catalunya)Continental shelfMarine sedimentsEffect of human beings on natureBarcelona (Catalonia)Seafloor sediments were collected from the Barcelona continental shelf, NE Spain, to determine the textural characteristics and sedimentary processes related to different depositional systems and human pressures. The Barcelona continental shelf is principally influenced by the discharge of the Llobregat and Besòs rivers, and also by anthropogenic modifications such as the diversion of the Llobregat River or the enlargement of the Port of Barcelona. Sedimentological, physical and biogeochemical properties of 14 sediment cores and grabs indicate the presence of three distinct depositional environments linked to river-influenced, marine-influenced and mixed sedimentation. Sedimentological results have been used to groundtruth available backscatter data. The river-influenced environment, mainly associated to the Llobregat River input, does not reach the shelf edge as the prevailing oceanographic currents deflect sediments south-westward. Riverine sediments are fine-grained, with abundant plant debris, micas and relatively high organic carbon content. The associated sedimentary features are the Holocene prodelta and two modern mud patches. The marine-influenced environment extends north-easterly over the middle and outer shelf and on the upper continental slope. The sediments are coarser grained with abundant bioclasts and lower organic carbon content. Mixed sedimentation is present between the river- and marine-influenced areas. In addition, 210Pb, 226Ra and 137Cs radiometric analyses were used to estimate accumulation rates as well as to identify sites with disturbed sedimentation. Relatively high sediment accumulation rates (up to 0.70-1.03 g·cm-2·yr-1 equivalent to 6.4-10 mm·yr-1) are estimated on the Llobregat prodelta while moderate rates (0.21-0.46 g·cm-2·yr-1 or 1.6-3.6 mm·yr-1) are found between the Besòs and the Llobregat outlets. Two sediment cores show a sharp change from river-influenced to marine-dominated conditions that occurred in the mid- 1960s. This is interpreted as a significant regression (~2.5 km in 40 years) of the river-influenced domain that may be associated to the extension of the Port of Barcelona and the canalization of the Besòs River, amongst other reasons. Other important human impacts observed in the Barcelona continental shelf are (i) sediment mixing by dredging, ship anchoring and trawling; and (ii) possible organic pollution associated to river and sewage discharges.Universitat de Barcelona (UB). Institut de Ciències de la Terra Jaume Almera (ICTJA). Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDEA). Universitat Autonònoma de Barcelona (UAB). Consejo Superior de Investigaciones Científicas (CSIC)2009info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/16901Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: http://doi.org/10.1344/105.000001528Geologica Acta, 2009, vol. 8, núm. 2, p. 169-187http://doi.org/10.1344/105.000001528cc by-sa (c) Liquete et al., 2009http://creativecommons.org/licenses/by-sa/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/169012026-05-27T06:46:51Z |
| dc.title.none.fl_str_mv |
Modern sedimentation patterns and human impacts on the Barcelona continental shelf (NE Spain). |
| title |
Modern sedimentation patterns and human impacts on the Barcelona continental shelf (NE Spain). |
| spellingShingle |
Modern sedimentation patterns and human impacts on the Barcelona continental shelf (NE Spain). Liquete García, Camino Plataforma continental Sediments marins Influència de l'home en la natura Barcelona (Catalunya) Continental shelf Marine sediments Effect of human beings on nature Barcelona (Catalonia) |
| title_short |
Modern sedimentation patterns and human impacts on the Barcelona continental shelf (NE Spain). |
| title_full |
Modern sedimentation patterns and human impacts on the Barcelona continental shelf (NE Spain). |
| title_fullStr |
Modern sedimentation patterns and human impacts on the Barcelona continental shelf (NE Spain). |
| title_full_unstemmed |
Modern sedimentation patterns and human impacts on the Barcelona continental shelf (NE Spain). |
| title_sort |
Modern sedimentation patterns and human impacts on the Barcelona continental shelf (NE Spain). |
| dc.creator.none.fl_str_mv |
Liquete García, Camino Lucchi, R. G. Garcia-Orellana, Jordi Canals Artigas, Miquel Masqué, Pere Pasqual Mas, Catalina Lavoie, Caroline |
| author |
Liquete García, Camino |
| author_facet |
Liquete García, Camino Lucchi, R. G. Garcia-Orellana, Jordi Canals Artigas, Miquel Masqué, Pere Pasqual Mas, Catalina Lavoie, Caroline |
| author_role |
author |
| author2 |
Lucchi, R. G. Garcia-Orellana, Jordi Canals Artigas, Miquel Masqué, Pere Pasqual Mas, Catalina Lavoie, Caroline |
| author2_role |
author author author author author author |
| dc.subject.none.fl_str_mv |
Plataforma continental Sediments marins Influència de l'home en la natura Barcelona (Catalunya) Continental shelf Marine sediments Effect of human beings on nature Barcelona (Catalonia) |
| topic |
Plataforma continental Sediments marins Influència de l'home en la natura Barcelona (Catalunya) Continental shelf Marine sediments Effect of human beings on nature Barcelona (Catalonia) |
| description |
Seafloor sediments were collected from the Barcelona continental shelf, NE Spain, to determine the textural characteristics and sedimentary processes related to different depositional systems and human pressures. The Barcelona continental shelf is principally influenced by the discharge of the Llobregat and Besòs rivers, and also by anthropogenic modifications such as the diversion of the Llobregat River or the enlargement of the Port of Barcelona. Sedimentological, physical and biogeochemical properties of 14 sediment cores and grabs indicate the presence of three distinct depositional environments linked to river-influenced, marine-influenced and mixed sedimentation. Sedimentological results have been used to groundtruth available backscatter data. The river-influenced environment, mainly associated to the Llobregat River input, does not reach the shelf edge as the prevailing oceanographic currents deflect sediments south-westward. Riverine sediments are fine-grained, with abundant plant debris, micas and relatively high organic carbon content. The associated sedimentary features are the Holocene prodelta and two modern mud patches. The marine-influenced environment extends north-easterly over the middle and outer shelf and on the upper continental slope. The sediments are coarser grained with abundant bioclasts and lower organic carbon content. Mixed sedimentation is present between the river- and marine-influenced areas. In addition, 210Pb, 226Ra and 137Cs radiometric analyses were used to estimate accumulation rates as well as to identify sites with disturbed sedimentation. Relatively high sediment accumulation rates (up to 0.70-1.03 g·cm-2·yr-1 equivalent to 6.4-10 mm·yr-1) are estimated on the Llobregat prodelta while moderate rates (0.21-0.46 g·cm-2·yr-1 or 1.6-3.6 mm·yr-1) are found between the Besòs and the Llobregat outlets. Two sediment cores show a sharp change from river-influenced to marine-dominated conditions that occurred in the mid- 1960s. This is interpreted as a significant regression (~2.5 km in 40 years) of the river-influenced domain that may be associated to the extension of the Port of Barcelona and the canalization of the Besòs River, amongst other reasons. Other important human impacts observed in the Barcelona continental shelf are (i) sediment mixing by dredging, ship anchoring and trawling; and (ii) possible organic pollution associated to river and sewage discharges. |
| publishDate |
2009 |
| dc.date.none.fl_str_mv |
2009 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/16901 |
| url |
https://hdl.handle.net/2445/16901 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Reproducció del document publicat a: http://doi.org/10.1344/105.000001528 Geologica Acta, 2009, vol. 8, núm. 2, p. 169-187 http://doi.org/10.1344/105.000001528 |
| dc.rights.none.fl_str_mv |
cc by-sa (c) Liquete et al., 2009 http://creativecommons.org/licenses/by-sa/3.0/es/ info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
cc by-sa (c) Liquete et al., 2009 http://creativecommons.org/licenses/by-sa/3.0/es/ |
| eu_rights_str_mv |
openAccess |
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application/pdf |
| dc.publisher.none.fl_str_mv |
Universitat de Barcelona (UB). Institut de Ciències de la Terra Jaume Almera (ICTJA). Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDEA). Universitat Autonònoma de Barcelona (UAB). Consejo Superior de Investigaciones Científicas (CSIC) |
| publisher.none.fl_str_mv |
Universitat de Barcelona (UB). Institut de Ciències de la Terra Jaume Almera (ICTJA). Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDEA). Universitat Autonònoma de Barcelona (UAB). Consejo Superior de Investigaciones Científicas (CSIC) |
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Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) reponame:Dipòsit Digital de la UB instname:Universidad de Barcelona |
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Universidad de Barcelona |
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Dipòsit Digital de la UB |
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Dipòsit Digital de la UB |
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