English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/130957
COMPARTIR / IMPACTO:
Estadísticas
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:
Título

Toxicity of seabird guano to sea urchin embryos and interaction with Cu and Pb

AutorRial, Diego ; Santos-Echeandía, Juan ; Álvarez-Salgado, Xosé Antón ; Jordi, Antoni ; Tovar-Sánchez, Antonio ; Bellas, J.
Palabras claveAntagonism
Joint toxicity
Response surface
Sea urchin embryo
Seabird guano
Trace metals
Fecha de publicación2016
EditorElsevier
CitaciónChemosphere 145: 384-393 (2016)
ResumenGuano is an important source of marine-derived nutrients to seabird nesting areas. Seabirds usually present high levels of metals and other contaminants because the bioaccumulation processes and biotic depositions can increase the concentration of pollutants in the receiving environments. The objectives of this study were to investigate: the toxicity of seabird guano and the joint toxicity of guano, Cu and Pb by using the sea urchin embryo-larval bioassay. In a first experiment, aqueous extracts of guano were prepared at two loading rates (0.462 and 1.952 g L−1) and toxicity to sea-urchin embryos was tested. Toxicity was low and not dependent of the load of guano used (EC50 0.42 ± 0.03 g L−1). Trace metal concentrations were also low either in guano or in aqueous extracts of guano and the toxicity of extracts were apparently related to dissolved organic matter. In a second experiment, the toxicity of Cu–Pb mixtures in artificial seawater and in extracts of guano (at two loadings: 0.015 and 0.073 g L−1), was tested. According to individual fittings, Cu added to extracts of guano showed less toxicity than when dissolved in artificial seawater. The response surfaces obtained for mixtures of Cu and Pb in artificial seawater, and in 0.015 g L−1 and 0.073 g L−1 of guano, were better described by Independent Action model adapted to describe antagonism, than by the other proposed models. This implied accepting that EC50 for Cu and Pb increased with the load of guano and with a greater interaction for Cu than for Pb
Descripción10 páginas, 3 figuras, 3 tablas
Versión del editorhttp://dx.doi.org/10.1016/j.chemosphere.2015.11.064
URIhttp://hdl.handle.net/10261/130957
DOI10.1016/j.chemosphere.2015.11.064
ISSN0045-6535
E-ISSN1879-1298
Aparece en las colecciones: (IIM) Artículos
(IMEDEA) Artículos
(ICMAN) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Toxicity_seabird_guano.pdf1,8 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.