期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 605, 期 -, 页码 589-597出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2017.06.148
关键词
Biomagnification; Trophic magnification factor (TMF); Deep-sea; Stable isotopes; Body size; Predator: Prey mass ratio (PPMR)
资金
- Ministry of Science and Innovation, Spanish Government [CTM2010-21810-CO3-01]
- Spanish Ministry of Economy and Competitiveness, Comunidad de Madrid (Spain) [AGL2012-37201, S2013/ABI-3028 - AVANSECAL]
- European funding from FEDER programs [AGL2012-37201, S2013/ABI-3028 - AVANSECAL]
- Ministry of Education, Culture and Sports [12/00851]
Polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and polychlorinated dibenzo-pdioxins and -furans (PCDD/Fs) were measured in a temperate, deep-sea ecosystem, the Aviles 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 (delta N-15). 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 delta N-15, 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. (C) 2017 Elsevier B.V. All rights reserved.
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