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Title

Biomagnification of persistent organic pollutants in a deep-sea, temperate food web

AuthorsRomero-Romero, Sonia ; Herrero, Laura ; Fernández Martín, Mario Antonio ; Gómara, B. ; Acuña Fernández, José Luis
KeywordsDeep-sea
Trophic magnification factor (TMF)
Biomagnification
Predator: Prey mass ratio (PPMR)
Body size
Stable isotopes
Issue Date2017
PublisherElsevier
CitationScience of the Total Environment 605-606: 589-597 (2017)
AbstractPolychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and polychlorinated dibenzo-p-dioxins and -furans (PCDD/Fs) were measured in a temperate, deep-sea ecosystem, the Avilés submarine Canyon (AC; Cantabrian Sea, Southern Bay of Biscay). There was an increase of contaminant concentration with the trophic level of the organisms, as calculated from stable nitrogen isotope data (δN). Such biomagnification was only significant for the pelagic food web and its magnitude was highly dependent on the type of top predators included in the analysis. The trophic magnification factor (TMF) for PCB-153 in the pelagic food web (spanning four trophic levels) was 6.2 or 2.2, depending on whether homeotherm top predators (cetaceans and seabirds) were included or not in the analysis, respectively. Since body size is significantly correlated with δN, it can be used as a proxy to estimate trophic magnification, what can potentially lead to a simple and convenient method to calculate the TMF. In spite of their lower biomagnification, deep-sea fishes showed higher concentrations than their shallower counterparts, although those differences were not significant. In summary, the AC fauna exhibits contaminant levels comparable or lower than those reported in other systems.
Publisher version (URL)http://dx.doi.org/10.1016/j.scitotenv.2017.06.148
URIhttp://hdl.handle.net/10261/162030
DOIhttp://dx.doi.org/10.1016/j.scitotenv.2017.06.148
Identifiersdoi: 10.1016/j.scitotenv.2017.06.148
issn: 0048-9697
e-issn: 1879-1026
Appears in Collections:(IQOG) Artículos
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