English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/97799
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
Exportar a otros formatos:
Title

Fish farming enhances biomass and nutrient loss in Posidonia oceanica (L.) Delile

AuthorsApostolaki, Eugenia T.; Marbà, Núria ; Holmer, Marianne; Karakassis, Ioannis
Issue Date2009
PublisherAcademic Press
CitationEstuarine, Coastal and Shelf Science 81(3): 390-400 (2009)
AbstractFish farming impact on the seasonal biomass, carbon and nutrient (nitrogen and phosphorus) balance of the endemic Mediterranean seagrass Posidonia oceanica was assessed in the Aegean Sea (Greece) in order to detect changes in magnitude and fate of seagrass production and nutrient incorporation with organic loading of the meadows. Phosphorus concentration in the leaves, rhizomes and roots was enhanced under the cages throughout the study. Standing biomass was diminished by 64% and carbon, nitrogen and phosphorus standing stock by 64%, 61% and 48%, respectively, under the cages in relation to those at the control. Seagrass production decreased by 68% and element (C, N, P) incorporation by 67%, 58% and 58%, respectively, under the cages. Leaf shedding was reduced by 81% and loss of elements (C, N, and P) through shedding by 82%, 74% and 72%, respectively, under the cages. Leaf and element (C, N, P) residual loss rate, accounting for grazing and mechanical breakage of leaves, was decreased by 79%, 85%, 100% and 96%, respectively, at the control station. At the control station, 13.98 g C m-2 yr-1, 1.91 g N m-2 yr-1 and 0.05 g P m-2 yr-1 were produced in excess of export and loss. In contrast, under the cages 12.69 g C m-2 yr-1, 0.31 g N m-2 yr-1 and 0.04 g P m-2 yr-1 were released from the meadow. Organic loading due to fish farm discharges transformed the seagrass meadow under the cages from a typical sink to a source of organic carbon and nutrients. © 2008 Elsevier Ltd. All rights reserved.
URIhttp://hdl.handle.net/10261/97799
DOI10.1016/j.ecss.2008.11.014
Identifiersdoi: 10.1016/j.ecss.2008.11.014
issn: 0272-7714
Appears in Collections:(IMEDEA) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe 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.