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Título: | Biomagnification of persistent organic pollutants in a deep-sea, temperate food web |
Autor: | Romero-Romero, Sonia CSIC; Herrero, Laura CSIC ORCID; Fernández Martín, Mario Antonio ; Gómara, Belén CSIC ORCID ; Acuña Fernández, José Luis | Palabras clave: | Deep-sea Trophic magnification factor (TMF) Biomagnification Predator: Prey mass ratio (PPMR) Body size Stable isotopes |
Fecha de publicación: | 2017 | Editor: | Elsevier | Citación: | Science of the Total Environment 605-606: 589-597 (2017) | Resumen: | Polychlorinated 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. | Versión del editor: | http://dx.doi.org/10.1016/j.scitotenv.2017.06.148 | URI: | http://hdl.handle.net/10261/162030 | DOI: | 10.1016/j.scitotenv.2017.06.148 | Identificadores: | doi: 10.1016/j.scitotenv.2017.06.148 issn: 0048-9697 e-issn: 1879-1026 |
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