Tracing salmon-derived nutrients and contaminants in freshwater food webs across a pronounced spawner density gradient.
Environ Toxicol Chem
; 26(6): 1100-8, 2007 Jun.
Article
em En
| MEDLINE
| ID: mdl-17571673
ABSTRACT
Many have demonstrated that anadromous Pacific salmon are significant vectors of nutrients from the ocean to freshwaters. Recently. however, it has been recognized that salmon spawners also input significant quantities of contaminants. The objectives of this paper are to delineate the extent to which salmon-derived nutrients are integrated into the freshwater food web using delta(15)N and delta(13)C and to assess the influence of the salmon pathway in the accumulation of contaminants in rainbow trout (Oncorhynchus mykiss). We found that the delta(15)N and delta(13)C of food web components were related positively and significantly to sockeye salmon (Oncorhynchus nerka) spawner density. Contaminant concentrations in rainbow trout also positively and significantly were related to sockeye salmon spawner density. These data suggest that the anadromous salmon nutrient and contaminant pathways are related and significantly impact the contaminant burden of resident fish.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
/
Cadeia Alimentar
Limite:
Animals
Idioma:
En
Ano de publicação:
2007
Tipo de documento:
Article