Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9485170 | Progress in Oceanography | 2005 | 31 Pages |
Abstract
In the canyon, suspended sediment concentration, downward particle fluxes, chlorophyll and particulate C and N were significantly higher up-canyon from about 1200Â m depth than offshore, defining, along with the different hydrodynamics, two canyon domains: one from the canyon head to about 1200Â m depth more affected by the canyon confinement and the other deeper than 1200Â m depth more controlled by the mean flow and the shelf-slope front. The higher near-bottom downward total mass fluxes were recorded in the canyon axis at 1200Â m depth along with sharp turbidity increases and are related to sediment gravity flows. During the deployment period, the increase in downward particle fluxes occurred by mid-November, when a severe storm took place. On the canyon walls at 1200Â m depth, suspended sediment concentrations, downward particle fluxes, chlorophyll and particulate C and N were higher on the southern wall than on the northern wall inversely to the current's energy. This could be caused by an upward water supply on the southern canyon wall and/or the mean flow interacting with the canyon bathymetry. In the swimmers collected by the sediment traps, the dominant species was an elasipod holothurian, which has not been recorded in other canyons or elsewhere in the Mediterranean, indicating particular speciation.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geology
Authors
Albert Palanques, Emilio GarcÃa-Ladona, Damià Gomis, Jacobo MartÃn, Marta Marcos, Ananda Pascual, Pere Puig, Josep-Maria Gili, Mikhail Emelianov, Sebastià Monserrat, Jorge Guillén, JoaquÃn Tintoré, Mariona Segura, Antoni Jordi, Simón Ruiz,