Changes in sediment accumulation rates within NW Mediterranean submarine canyons caused by bottom trawling activities

Changes in sediment accumulation rates within NW Mediterranean submarine canyons caused by bottom trawling activities

Submarine Canyon Dynamics in the Mediterranean and Tributary Seas - An integrated geological, oceanographic and biological perspective, 15-18 April 2015, Sorrento, Italy.-- 8 pages, 5 figures

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Main Authors: Puig, Pere, Masqué, Pere, Martín, Jacobo, Paradis Vilar, Sarah, Juan Díaz, Xènia, Toro, Miguel, Palanques, Albert
Other Authors: European Commission
Format: capítulo de libro biblioteca
Published: Commission Internationale pour l'Exploration Scientifique de la mer Méditerranée
Online Access:http://hdl.handle.net/10261/130786
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100002809
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spelling dig-icm-es-10261-1307862022-09-21T09:18:34Z Changes in sediment accumulation rates within NW Mediterranean submarine canyons caused by bottom trawling activities Puig, Pere Masqué, Pere Martín, Jacobo Paradis Vilar, Sarah Juan Díaz, Xènia Toro, Miguel Palanques, Albert European Commission Generalitat de Catalunya Submarine Canyon Dynamics in the Mediterranean and Tributary Seas - An integrated geological, oceanographic and biological perspective, 15-18 April 2015, Sorrento, Italy.-- 8 pages, 5 figures The disturbance of the marine sedimentary environments by commercial bottom trawling is a matter of concern. The direct physical effects of this fishing technique include scraping and ploughing of the seabed and increases of the near-bottom water turbidity by sediment resuspension. However, the quantification of the sediment that has been resuspended by this anthropogenic activity over the years and has been ultimately transferred along and across the margin remains largely unaddressed. The analysis of sediment accumulation rates from sediment cores collected along the axes of several submarine canyons in the Catalan margin (northwestern Mediterranean) has allowed to estimate the contribution of bottom trawling to the present-day sediment dynamics. 210Pb chronologies, occasionally supported by 137Cs dating, indicate a rapid increase of sediment accumulation rates since the 1960-70s, along with a strong impulse in the industrialization of the trawling fleets of this region. Such increase has been associated to the enhanced delivery of sediment resuspended by trawlers from shelf and upper slope trawling grounds towards submarine canyons, as a consequence of the rapid technical development at that time, in terms of engine power and gear size. This change has been observed in La Fonera (or Palamós) Canyon (one of the most prominent canyons of the region) at depths greater than 1700 m, while in other canyons not so deeply incised it is restricted to shallower regions (-1000 m in depth) closer to fishing grounds. Two sampling sites from La Fonera and Foix submarine canyons that exhibited high sediment accumulation rates (0.6-0.7 cm y-1) were revisited several years after the first chronological analyses. These two new cores revealed a second and even more significant increase of sediment accumulation rates in both canyons which occurred circa 2000 and reached values higher than 2 cm y-1. This second change at the beginning of the 21st century has been attributed to a preferential displacement of the trawling fleet towards slope fishing grounds surrounding submarine canyons, and to new technical improvements in trawling vessels, presumably related to subsidies and aids provided by the European Commission to the fishing industry This work was funded by the HERMIONE and PERSEUS projects (7FP Grant agreements: 226354 and 287600) and the Generalitat de Catalunya grants (2014 SGR 1356 and 1642) Peer Reviewed 2015 2016-04-05T08:26:21Z capítulo de libro http://purl.org/coar/resource_type/c_5794 issn: 1726-5886 Submarine canyon dynamics in the Mediterranean and tributary seas- An integrated geological, oceanographic and biological perspective: 71-78 (2015) CIESM Workshop Monographs 47: 71-78 (2015) http://hdl.handle.net/10261/130786 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100002809 #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/226354 http://www.ciesm.org/online/monographs/Sorrento15.html Sí none Commission Internationale pour l'Exploration Scientifique de la mer Méditerranée
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
description Submarine Canyon Dynamics in the Mediterranean and Tributary Seas - An integrated geological, oceanographic and biological perspective, 15-18 April 2015, Sorrento, Italy.-- 8 pages, 5 figures
author2 European Commission
author_facet European Commission
Puig, Pere
Masqué, Pere
Martín, Jacobo
Paradis Vilar, Sarah
Juan Díaz, Xènia
Toro, Miguel
Palanques, Albert
format capítulo de libro
author Puig, Pere
Masqué, Pere
Martín, Jacobo
Paradis Vilar, Sarah
Juan Díaz, Xènia
Toro, Miguel
Palanques, Albert
spellingShingle Puig, Pere
Masqué, Pere
Martín, Jacobo
Paradis Vilar, Sarah
Juan Díaz, Xènia
Toro, Miguel
Palanques, Albert
Changes in sediment accumulation rates within NW Mediterranean submarine canyons caused by bottom trawling activities
author_sort Puig, Pere
title Changes in sediment accumulation rates within NW Mediterranean submarine canyons caused by bottom trawling activities
title_short Changes in sediment accumulation rates within NW Mediterranean submarine canyons caused by bottom trawling activities
title_full Changes in sediment accumulation rates within NW Mediterranean submarine canyons caused by bottom trawling activities
title_fullStr Changes in sediment accumulation rates within NW Mediterranean submarine canyons caused by bottom trawling activities
title_full_unstemmed Changes in sediment accumulation rates within NW Mediterranean submarine canyons caused by bottom trawling activities
title_sort changes in sediment accumulation rates within nw mediterranean submarine canyons caused by bottom trawling activities
publisher Commission Internationale pour l'Exploration Scientifique de la mer Méditerranée
url http://hdl.handle.net/10261/130786
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100002809
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AT masquepere changesinsedimentaccumulationrateswithinnwmediterraneansubmarinecanyonscausedbybottomtrawlingactivities
AT martinjacobo changesinsedimentaccumulationrateswithinnwmediterraneansubmarinecanyonscausedbybottomtrawlingactivities
AT paradisvilarsarah changesinsedimentaccumulationrateswithinnwmediterraneansubmarinecanyonscausedbybottomtrawlingactivities
AT juandiazxenia changesinsedimentaccumulationrateswithinnwmediterraneansubmarinecanyonscausedbybottomtrawlingactivities
AT toromiguel changesinsedimentaccumulationrateswithinnwmediterraneansubmarinecanyonscausedbybottomtrawlingactivities
AT palanquesalbert changesinsedimentaccumulationrateswithinnwmediterraneansubmarinecanyonscausedbybottomtrawlingactivities
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