English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/50807
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

Benthicepelagic coupling and postdepositional processes as revealed by the distribution of opal in sediments: The case of the Rı´a de Vigo (NW Iberian Peninsula)

AuthorsBernárdez, Patricia CSIC ORCID; Francés, G.; Prego, R. CSIC ORCID
KeywordsOpal
Surface and subsurface sediments
Biosiliceous flux
Ría
Galicia
Issue Date2006
PublisherElsevier
CitationEstuarine Coastal and Shelf Science 68: 271-281 (2006)
AbstractOpal concentrations in dry bulk sediment were measured in 43 sampling stations in the Ría de Vigo at 0e1, 1e2, 4e5, 10e11 and 14e15 cm sediment depths. The amount of opal was correlated with the biogenic silicon flux to the sediment obtained by means of a box model. The biosiliceous flux to the sediment (annual mean) is in good agreement with the content of opal found in the uppermost oxic layer, revealing that pelagic primary production is the main factor controlling the biogenic silica content in surface sediments. This correlation is illustrated by the equation: Opal (wt.%) ¼ 0.103BSiF þ 0.414 (R2 ¼ 0.95) where BSiF is the biogenic silicon flux to the sediment in g Si m-2 year-1. In the innermost part of the ría, i.e. San Simón Inlet, the content of opal is higher than predicted by the equation, since other biogenic silica sources to the sediment may be involved, as benthic diatoms proliferation or freshwater diatoms input. Elevated percentages recorded in the inner ría in the subsuperficial sediment respond to the establishment of suboxiceanoxic conditions that enhance the preservation of opal. The input of faecal pellets to the surface sediment derived from mussel rafts also controls the opal distribution and concentration in the ría.
Description11 páginas, 5 figuras, 1 tabla
Publisher version (URL)http://dx.doi.org/10.1016/j.ecss.2006.02.008
URIhttp://hdl.handle.net/10261/50807
DOIhttp://dx.doi.org/10.1016/j.ecss.2006.02.008
ISSN0272-7714
Appears in Collections:(IIM) Artículos
Files in This Item:
File Description SizeFormat 
Benthic_pelagic_coupling.pdf5,9 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.